* [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
[not found] <1429255769-13639-1-git-send-email-boris.brezillon@free-electrons.com>
2015-04-17 7:29 ` Boris Brezillon
2015-04-17 7:29 ` Boris Brezillon
@ 2015-04-17 7:29 ` Boris Brezillon
1 sibling, 0 replies; 18+ messages in thread
From: Boris Brezillon @ 2015-04-17 7:29 UTC (permalink / raw)
To: Mike Turquette
Cc: Mikko Perttunen, Boris Brezillon, Jonathan Corbet, Shawn Guo,
ascha Hauer, David Brown, Daniel Walker, Bryan Huntsman,
Tony Lindgren, Paul Walmsley, Liviu Dudau, Sudeep Holla,
Lorenzo Pieralisi, Ralf Baechle, Max Filippov, Heiko Stuebner,
Sylwester Nawrocki, Tomasz Figa, Barry Song, Viresh Kumar
Clock rates are stored in an unsigned long field, but ->round_rate()
(which returns a rounded rate from a requested one) returns a long
value (errors are reported using negative error codes), which can lead
to long overflow if the clock rate exceed 2Ghz.
Change ->round_rate() prototype to return 0 or an error code, and pass the
requested rate as a pointer so that it can be adjusted depending on
hardware capabilities.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
CC: Jonathan Corbet <corbet@lwn.net>
CC: Shawn Guo <shawn.guo@linaro.org>
CC: ascha Hauer <kernel@pengutronix.de>
CC: David Brown <davidb@codeaurora.org>
CC: Daniel Walker <dwalker@fifo99.com>
CC: Bryan Huntsman <bryanh@codeaurora.org>
CC: Tony Lindgren <tony@atomide.com>
CC: Paul Walmsley <paul@pwsan.com>
CC: Liviu Dudau <liviu.dudau@arm.com>
CC: Sudeep Holla <sudeep.holla@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: Max Filippov <jcmvbkbc@gmail.com>
CC: Heiko Stuebner <heiko@sntech.de>
CC: Sylwester Nawrocki <s.nawrocki@samsung.com>
CC: Tomasz Figa <tomasz.figa@gmail.com>
CC: Barry Song <baohua@kernel.org>
CC: Viresh Kumar <viresh.linux@gmail.com>
CC: "Emilio López" <emilio@elopez.com.ar>
CC: Maxime Ripard <maxime.ripard@free-electrons.com>
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CC: Stephen Warren <swarren@wwwdotorg.org>
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CC: Tero Kristo <t-kristo@ti.com>
CC: Ulf Hansson <ulf.hansson@linaro.org>
CC: Michal Simek <michal.simek@xilinx.com>
CC: Philipp Zabel <p.zabel@pengutronix.de>
CC: linux-doc@vger.kernel.org
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Documentation/clk.txt | 4 +-
arch/arm/mach-imx/clk-busy.c | 2 +-
arch/arm/mach-imx/clk-cpu.c | 12 +++-
arch/arm/mach-imx/clk-fixup-div.c | 2 +-
arch/arm/mach-imx/clk-pfd.c | 11 ++--
arch/arm/mach-imx/clk-pllv2.c | 8 ++-
arch/arm/mach-imx/clk-pllv3.c | 46 +++++++------
arch/arm/mach-msm/clock-pcom.c | 4 +-
arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c | 13 ++--
arch/arm/mach-omap2/clkt_clksel.c | 6 +-
arch/arm/mach-omap2/clkt_dpll.c | 21 +++---
arch/arm/mach-omap2/clock.h | 4 +-
arch/arm/mach-omap2/dpll3xxx.c | 27 +++++---
arch/arm/mach-omap2/dpll44xx.c | 26 +++++---
arch/arm/mach-vexpress/spc.c | 11 +++-
arch/mips/alchemy/common/clock.c | 13 ++--
drivers/clk/at91/clk-h32mx.c | 24 ++++---
drivers/clk/at91/clk-peripheral.c | 31 +++++----
drivers/clk/at91/clk-pll.c | 14 ++--
drivers/clk/at91/clk-plldiv.c | 22 ++++---
drivers/clk/at91/clk-smd.c | 24 ++++---
drivers/clk/at91/clk-usb.c | 34 ++++++----
drivers/clk/clk-axi-clkgen.c | 5 +-
drivers/clk/clk-cdce706.c | 46 ++++++-------
drivers/clk/clk-composite.c | 23 ++++---
drivers/clk/clk-divider.c | 16 +++--
drivers/clk/clk-fixed-factor.c | 7 +-
drivers/clk/clk-fractional-divider.c | 16 +++--
drivers/clk/clk-highbank.c | 18 +++---
drivers/clk/clk-si5351.c | 96 ++++++++++++++--------------
drivers/clk/clk-si570.c | 14 ++--
drivers/clk/clk-u300.c | 65 ++++++++++---------
drivers/clk/clk-vt8500.c | 27 ++++----
drivers/clk/clk-wm831x.c | 11 ++--
drivers/clk/clk-xgene.c | 11 ++--
drivers/clk/clk.c | 15 +++--
drivers/clk/mmp/clk-frac.c | 14 ++--
drivers/clk/mvebu/clk-corediv.c | 7 +-
drivers/clk/mvebu/clk-cpu.c | 9 +--
drivers/clk/mxs/clk-div.c | 4 +-
drivers/clk/mxs/clk-frac.c | 11 ++--
drivers/clk/mxs/clk-ref.c | 11 ++--
drivers/clk/qcom/clk-regmap-divider.c | 4 +-
drivers/clk/rockchip/clk-pll.c | 13 ++--
drivers/clk/samsung/clk-pll.c | 13 ++--
drivers/clk/shmobile/clk-div6.c | 7 +-
drivers/clk/shmobile/clk-rcar-gen2.c | 9 +--
drivers/clk/sirf/clk-common.c | 18 +++---
drivers/clk/spear/clk-aux-synth.c | 10 ++-
drivers/clk/spear/clk-frac-synth.c | 10 ++-
drivers/clk/spear/clk-gpt-synth.c | 10 ++-
drivers/clk/spear/clk-vco-pll.c | 20 ++++--
drivers/clk/st/clk-flexgen.c | 11 ++--
drivers/clk/st/clkgen-fsyn.c | 21 +++---
drivers/clk/st/clkgen-mux.c | 2 +-
drivers/clk/sunxi/clk-factors.c | 14 ++--
drivers/clk/tegra/clk-audio-sync.c | 8 +--
drivers/clk/tegra/clk-divider.c | 19 ++++--
drivers/clk/tegra/clk-periph.c | 4 +-
drivers/clk/tegra/clk-pll.c | 39 ++++++-----
drivers/clk/ti/clk-dra7-atl.c | 9 +--
drivers/clk/ti/composite.c | 4 +-
drivers/clk/ti/divider.c | 9 +--
drivers/clk/ux500/clk-prcmu.c | 13 +++-
drivers/clk/versatile/clk-icst.c | 9 +--
drivers/clk/versatile/clk-vexpress-osc.c | 12 ++--
drivers/clk/zynq/pll.c | 7 +-
drivers/gpu/drm/imx/imx-tve.c | 15 +++--
drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c | 7 +-
drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c | 7 +-
drivers/media/platform/omap3isp/isp.c | 6 +-
drivers/rtc/rtc-hym8563.c | 14 ++--
include/linux/clk-provider.h | 6 +-
include/linux/clk/ti.h | 12 ++--
74 files changed, 672 insertions(+), 475 deletions(-)
diff --git a/Documentation/clk.txt b/Documentation/clk.txt
index 0e4f90a..fca8b7a 100644
--- a/Documentation/clk.txt
+++ b/Documentation/clk.txt
@@ -68,8 +68,8 @@ the operations defined in clk.h:
int (*is_enabled)(struct clk_hw *hw);
unsigned long (*recalc_rate)(struct clk_hw *hw,
unsigned long parent_rate);
- long (*round_rate)(struct clk_hw *hw,
- unsigned long rate,
+ int (*round_rate)(struct clk_hw *hw,
+ unsigned long *rate,
unsigned long *parent_rate);
long (*determine_rate)(struct clk_hw *hw,
unsigned long rate,
diff --git a/arch/arm/mach-imx/clk-busy.c b/arch/arm/mach-imx/clk-busy.c
index 4bb1bc4..f8c67e9 100644
--- a/arch/arm/mach-imx/clk-busy.c
+++ b/arch/arm/mach-imx/clk-busy.c
@@ -51,7 +51,7 @@ static unsigned long clk_busy_divider_recalc_rate(struct clk_hw *hw,
return busy->div_ops->recalc_rate(&busy->div.hw, parent_rate);
}
-static long clk_busy_divider_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_busy_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_busy_divider *busy = to_clk_busy_divider(hw);
diff --git a/arch/arm/mach-imx/clk-cpu.c b/arch/arm/mach-imx/clk-cpu.c
index aa1c345..f6af2d8 100644
--- a/arch/arm/mach-imx/clk-cpu.c
+++ b/arch/arm/mach-imx/clk-cpu.c
@@ -34,12 +34,18 @@ static unsigned long clk_cpu_recalc_rate(struct clk_hw *hw,
return clk_get_rate(cpu->div);
}
-static long clk_cpu_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_cpu_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_cpu *cpu = to_clk_cpu(hw);
+ long ret;
- return clk_round_rate(cpu->pll, rate);
+ ret = clk_round_rate(cpu->pll, *rate);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
}
static int clk_cpu_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/arm/mach-imx/clk-fixup-div.c b/arch/arm/mach-imx/clk-fixup-div.c
index 21db020..c2f4f00 100644
--- a/arch/arm/mach-imx/clk-fixup-div.c
+++ b/arch/arm/mach-imx/clk-fixup-div.c
@@ -48,7 +48,7 @@ static unsigned long clk_fixup_div_recalc_rate(struct clk_hw *hw,
return fixup_div->ops->recalc_rate(&fixup_div->divider.hw, parent_rate);
}
-static long clk_fixup_div_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_fixup_div_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_fixup_div *fixup_div = to_clk_fixup_div(hw);
diff --git a/arch/arm/mach-imx/clk-pfd.c b/arch/arm/mach-imx/clk-pfd.c
index 0b0f6f6..449fb7a 100644
--- a/arch/arm/mach-imx/clk-pfd.c
+++ b/arch/arm/mach-imx/clk-pfd.c
@@ -68,14 +68,14 @@ static unsigned long clk_pfd_recalc_rate(struct clk_hw *hw,
return tmp;
}
-static long clk_pfd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_pfd_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
u64 tmp = *prate;
u8 frac;
- tmp = tmp * 18 + rate / 2;
- do_div(tmp, rate);
+ tmp = tmp * 18 + *rate / 2;
+ do_div(tmp, *rate);
frac = tmp;
if (frac < 12)
frac = 12;
@@ -85,7 +85,8 @@ static long clk_pfd_round_rate(struct clk_hw *hw, unsigned long rate,
tmp *= 18;
do_div(tmp, frac);
- return tmp;
+ *rate = tmp;
+ return 0;
}
static int clk_pfd_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/arm/mach-imx/clk-pllv2.c b/arch/arm/mach-imx/clk-pllv2.c
index 20889d5..6b48bf5 100644
--- a/arch/arm/mach-imx/clk-pllv2.c
+++ b/arch/arm/mach-imx/clk-pllv2.c
@@ -180,14 +180,16 @@ static int clk_pllv2_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
-static long clk_pllv2_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pllv2_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
u32 dp_op, dp_mfd, dp_mfn;
- __clk_pllv2_set_rate(rate, *prate, &dp_op, &dp_mfd, &dp_mfn);
- return __clk_pllv2_recalc_rate(*prate, MXC_PLL_DP_CTL_DPDCK0_2_EN,
+ __clk_pllv2_set_rate(*rate, *prate, &dp_op, &dp_mfd, &dp_mfn);
+ *rate = __clk_pllv2_recalc_rate(*prate, MXC_PLL_DP_CTL_DPDCK0_2_EN,
dp_op, dp_mfd, dp_mfn);
+
+ return 0;
}
static int clk_pllv2_prepare(struct clk_hw *hw)
diff --git a/arch/arm/mach-imx/clk-pllv3.c b/arch/arm/mach-imx/clk-pllv3.c
index 641ebc5..4d8f4eb 100644
--- a/arch/arm/mach-imx/clk-pllv3.c
+++ b/arch/arm/mach-imx/clk-pllv3.c
@@ -104,13 +104,15 @@ static unsigned long clk_pllv3_recalc_rate(struct clk_hw *hw,
return (div == 1) ? parent_rate * 22 : parent_rate * 20;
}
-static long clk_pllv3_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_pllv3_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long parent_rate = *prate;
- return (rate >= parent_rate * 22) ? parent_rate * 22 :
- parent_rate * 20;
+ *rate = (*rate >= parent_rate * 22) ? parent_rate * 22 :
+ parent_rate * 20;
+
+ return 0;
}
static int clk_pllv3_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -151,21 +153,23 @@ static unsigned long clk_pllv3_sys_recalc_rate(struct clk_hw *hw,
return parent_rate * div / 2;
}
-static long clk_pllv3_sys_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_pllv3_sys_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long parent_rate = *prate;
unsigned long min_rate = parent_rate * 54 / 2;
unsigned long max_rate = parent_rate * 108 / 2;
u32 div;
- if (rate > max_rate)
- rate = max_rate;
- else if (rate < min_rate)
- rate = min_rate;
- div = rate * 2 / parent_rate;
+ if (*rate > max_rate)
+ *rate = max_rate;
+ else if (*rate < min_rate)
+ *rate = min_rate;
+ div = *rate * 2 / parent_rate;
- return parent_rate * div / 2;
+ *rate = parent_rate * div / 2;
+
+ return 0;
}
static int clk_pllv3_sys_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -207,7 +211,7 @@ static unsigned long clk_pllv3_av_recalc_rate(struct clk_hw *hw,
return (parent_rate * div) + ((parent_rate / mfd) * mfn);
}
-static long clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
unsigned long parent_rate = *prate;
@@ -217,18 +221,20 @@ static long clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long rate,
u32 mfn, mfd = 1000000;
s64 temp64;
- if (rate > max_rate)
- rate = max_rate;
- else if (rate < min_rate)
- rate = min_rate;
+ if (*rate > max_rate)
+ *rate = max_rate;
+ else if (*rate < min_rate)
+ *rate = min_rate;
- div = rate / parent_rate;
- temp64 = (u64) (rate - div * parent_rate);
+ div = *rate / parent_rate;
+ temp64 = (u64) (*rate - div * parent_rate);
temp64 *= mfd;
do_div(temp64, parent_rate);
mfn = temp64;
- return parent_rate * div + parent_rate / mfd * mfn;
+ *rate = parent_rate * div + parent_rate / mfd * mfn;
+
+ return 0;
}
static int clk_pllv3_av_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/arm/mach-msm/clock-pcom.c b/arch/arm/mach-msm/clock-pcom.c
index f5b69d7..118c288 100644
--- a/arch/arm/mach-msm/clock-pcom.c
+++ b/arch/arm/mach-msm/clock-pcom.c
@@ -109,11 +109,11 @@ static int pc_clk_is_enabled(struct clk_hw *hw)
return id;
}
-static long pc_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int pc_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *p_rate)
{
/* Not really supported; pc_clk_set_rate() does rounding on it's own. */
- return rate;
+ return 0;
}
static struct clk_ops clk_ops_pcom = {
diff --git a/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c b/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
index 85e0b0c0..2829a6f 100644
--- a/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
+++ b/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
@@ -71,8 +71,8 @@ unsigned long omap2_table_mpu_recalc(struct clk_hw *clk,
* Some might argue L3-DDR, others ARM, others IVA. This code is simple and
* just uses the ARM rates.
*/
-long omap2_round_to_table_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+int omap2_round_to_table_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
const struct prcm_config *ptr;
long highest_rate;
@@ -88,10 +88,15 @@ long omap2_round_to_table_rate(struct clk_hw *hw, unsigned long rate,
highest_rate = ptr->mpu_speed;
/* Can check only after xtal frequency check */
- if (ptr->mpu_speed <= rate)
+ if (ptr->mpu_speed <= *rate)
break;
}
- return highest_rate;
+
+ if (highest_rate < 0)
+ return highest_rate;
+
+ *rate = highest_rate;
+ return 0;
}
/* Sets basic clocks based on the specified rate */
diff --git a/arch/arm/mach-omap2/clkt_clksel.c b/arch/arm/mach-omap2/clkt_clksel.c
index 7ee2610..b932276 100644
--- a/arch/arm/mach-omap2/clkt_clksel.c
+++ b/arch/arm/mach-omap2/clkt_clksel.c
@@ -385,13 +385,15 @@ unsigned long omap2_clksel_recalc(struct clk_hw *hw, unsigned long parent_rate)
*
* Returns the rounded clock rate or returns 0xffffffff on error.
*/
-long omap2_clksel_round_rate(struct clk_hw *hw, unsigned long target_rate,
+int omap2_clksel_round_rate(struct clk_hw *hw, unsigned long *target_rate,
unsigned long *parent_rate)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
u32 new_div;
- return omap2_clksel_round_rate_div(clk, target_rate, &new_div);
+ *target_rate = omap2_clksel_round_rate_div(clk, *target_rate,
+ &new_div);
+ return 0;
}
/**
diff --git a/arch/arm/mach-omap2/clkt_dpll.c b/arch/arm/mach-omap2/clkt_dpll.c
index f251a14..7dac6b3 100644
--- a/arch/arm/mach-omap2/clkt_dpll.c
+++ b/arch/arm/mach-omap2/clkt_dpll.c
@@ -280,7 +280,7 @@ unsigned long omap2_get_dpll_rate(struct clk_hw_omap *clk)
* (expensive) function again. Returns ~0 if the target rate cannot
* be rounded, or the rounded rate upon success.
*/
-long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
+int omap2_dpll_round_rate(struct clk_hw *hw, unsigned long *target_rate,
unsigned long *parent_rate)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
@@ -295,16 +295,16 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
const char *clk_name;
if (!clk || !clk->dpll_data)
- return ~0;
+ return -EINVAL;
dd = clk->dpll_data;
ref_rate = __clk_get_rate(dd->clk_ref);
clk_name = __clk_get_name(hw->clk);
pr_debug("clock: %s: starting DPLL round_rate, target rate %lu\n",
- clk_name, target_rate);
+ clk_name, *target_rate);
- scaled_rt_rp = target_rate / (ref_rate / DPLL_SCALE_FACTOR);
+ scaled_rt_rp = *target_rate / (ref_rate / DPLL_SCALE_FACTOR);
scaled_max_m = dd->max_multiplier * DPLL_SCALE_FACTOR;
dd->last_rounded_rate = 0;
@@ -330,7 +330,7 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
if (m > scaled_max_m)
break;
- r = _dpll_test_mult(&m, n, &new_rate, target_rate,
+ r = _dpll_test_mult(&m, n, &new_rate, *target_rate,
ref_rate);
/* m can't be set low enough for this n - try with a larger n */
@@ -338,7 +338,7 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
continue;
/* skip rates above our target rate */
- delta = target_rate - new_rate;
+ delta = *target_rate - new_rate;
if (delta < 0)
continue;
@@ -357,14 +357,15 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
if (prev_min_delta == LONG_MAX) {
pr_debug("clock: %s: cannot round to rate %lu\n",
- clk_name, target_rate);
- return ~0;
+ clk_name, *target_rate);
+ return -EINVAL;
}
dd->last_rounded_m = min_delta_m;
dd->last_rounded_n = min_delta_n;
- dd->last_rounded_rate = target_rate - prev_min_delta;
+ dd->last_rounded_rate = *target_rate - prev_min_delta;
- return dd->last_rounded_rate;
+ *target_rate = dd->last_rounded_rate;
+ return 0;
}
diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h
index a56742f..cfe41b7 100644
--- a/arch/arm/mach-omap2/clock.h
+++ b/arch/arm/mach-omap2/clock.h
@@ -194,8 +194,8 @@ u32 omap2_clksel_round_rate_div(struct clk_hw_omap *clk,
u32 *new_div);
u8 omap2_clksel_find_parent_index(struct clk_hw *hw);
unsigned long omap2_clksel_recalc(struct clk_hw *hw, unsigned long parent_rate);
-long omap2_clksel_round_rate(struct clk_hw *hw, unsigned long target_rate,
- unsigned long *parent_rate);
+int omap2_clksel_round_rate(struct clk_hw *hw, unsigned long *target_rate,
+ unsigned long *parent_rate);
int omap2_clksel_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate);
int omap2_clksel_set_parent(struct clk_hw *hw, u8 field_val);
diff --git a/arch/arm/mach-omap2/dpll3xxx.c b/arch/arm/mach-omap2/dpll3xxx.c
index 44e57ec..7a6fb45 100644
--- a/arch/arm/mach-omap2/dpll3xxx.c
+++ b/arch/arm/mach-omap2/dpll3xxx.c
@@ -480,6 +480,7 @@ long omap3_noncore_dpll_determine_rate(struct clk_hw *hw, unsigned long rate,
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
struct dpll_data *dd;
+ int ret;
if (!hw || !rate)
return -EINVAL;
@@ -492,7 +493,10 @@ long omap3_noncore_dpll_determine_rate(struct clk_hw *hw, unsigned long rate,
(dd->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
*best_parent_clk = __clk_get_hw(dd->clk_bypass);
} else {
- rate = omap2_dpll_round_rate(hw, rate, best_parent_rate);
+ ret = omap2_dpll_round_rate(hw, &rate, best_parent_rate);
+ if (ret)
+ return ret;
+
*best_parent_clk = __clk_get_hw(dd->clk_ref);
}
@@ -768,27 +772,33 @@ int omap3_clkoutx2_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
-long omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long rate,
+int omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
const struct dpll_data *dd;
u32 v;
struct clk_hw_omap *pclk = NULL;
- if (!*prate)
+ if (!*prate) {
+ *rate = 0;
return 0;
+ }
pclk = omap3_find_clkoutx2_dpll(hw);
- if (!pclk)
+ if (!pclk) {
+ *rate = 0;
return 0;
+ }
dd = pclk->dpll_data;
/* TYPE J does not have a clkoutx2 */
if (dd->flags & DPLL_J_TYPE) {
- *prate = __clk_round_rate(__clk_get_parent(pclk->hw.clk), rate);
- return *prate;
+ *prate = __clk_round_rate(__clk_get_parent(pclk->hw.clk),
+ *rate);
+ *rate = *prate;
+ return 0;
}
WARN_ON(!dd->enable_mask);
@@ -803,12 +813,13 @@ long omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long rate,
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
unsigned long best_parent;
- best_parent = (rate / 2);
+ best_parent = (*rate / 2);
*prate = __clk_round_rate(__clk_get_parent(hw->clk),
best_parent);
}
- return *prate * 2;
+ *rate = *prate * 2;
+ return 0;
}
/* OMAP3/4 non-CORE DPLL clkops */
diff --git a/arch/arm/mach-omap2/dpll44xx.c b/arch/arm/mach-omap2/dpll44xx.c
index f231be0..afd3284 100644
--- a/arch/arm/mach-omap2/dpll44xx.c
+++ b/arch/arm/mach-omap2/dpll44xx.c
@@ -146,11 +146,12 @@ unsigned long omap4_dpll_regm4xen_recalc(struct clk_hw *hw,
* M-dividers) upon success, -EINVAL if @clk is null or not a DPLL, or
* ~0 if an error occurred in omap2_dpll_round_rate().
*/
-long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
- unsigned long target_rate,
- unsigned long *parent_rate)
+int omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
+ unsigned long *target_rate,
+ unsigned long *parent_rate)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
+ unsigned long rate = *target_rate;
struct dpll_data *dd;
long r;
@@ -166,7 +167,7 @@ long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
* target rate without using the 4X multiplier.
*/
r = omap2_dpll_round_rate(hw, target_rate, NULL);
- if (r != ~0)
+ if (!r)
goto out;
/*
@@ -174,9 +175,9 @@ long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
* this time see if using the 4X multiplier can help. Enabling the
* 4X multiplier is equivalent to dividing the target rate by 4.
*/
- r = omap2_dpll_round_rate(hw, target_rate / OMAP4430_REGM4XEN_MULT,
- NULL);
- if (r == ~0)
+ rate = *target_rate / OMAP4430_REGM4XEN_MULT;
+ r = omap2_dpll_round_rate(hw, &rate, NULL);
+ if (r)
return r;
dd->last_rounded_rate *= OMAP4430_REGM4XEN_MULT;
@@ -184,8 +185,9 @@ long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
out:
omap4_dpll_lpmode_recalc(dd);
+ *target_rate = dd->last_rounded_rate;
- return dd->last_rounded_rate;
+ return 0;
}
/**
@@ -209,6 +211,7 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw, unsigned long rate,
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
struct dpll_data *dd;
+ int ret;
if (!hw || !rate)
return -EINVAL;
@@ -221,8 +224,11 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw, unsigned long rate,
(dd->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
*best_parent_clk = __clk_get_hw(dd->clk_bypass);
} else {
- rate = omap4_dpll_regm4xen_round_rate(hw, rate,
- best_parent_rate);
+ ret = omap4_dpll_regm4xen_round_rate(hw, &rate,
+ best_parent_rate);
+ if (ret)
+ return ret;
+
*best_parent_clk = __clk_get_hw(dd->clk_ref);
}
diff --git a/arch/arm/mach-vexpress/spc.c b/arch/arm/mach-vexpress/spc.c
index f61158c..774ac3b 100644
--- a/arch/arm/mach-vexpress/spc.c
+++ b/arch/arm/mach-vexpress/spc.c
@@ -507,12 +507,19 @@ static unsigned long spc_recalc_rate(struct clk_hw *hw,
return freq * 1000;
}
-static long spc_round_rate(struct clk_hw *hw, unsigned long drate,
+static int spc_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *parent_rate)
{
struct clk_spc *spc = to_clk_spc(hw);
+ long ret;
- return ve_spc_round_performance(spc->cluster, drate);
+ ret = ve_spc_round_performance(spc->cluster, *drate);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+
+ return 0;
}
static int spc_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/mips/alchemy/common/clock.c b/arch/mips/alchemy/common/clock.c
index 6a98d2c..d697d8f 100644
--- a/arch/mips/alchemy/common/clock.c
+++ b/arch/mips/alchemy/common/clock.c
@@ -202,24 +202,27 @@ static int alchemy_clk_aux_setr(struct clk_hw *hw,
return 0;
}
-static long alchemy_clk_aux_roundr(struct clk_hw *hw,
- unsigned long rate,
+static int alchemy_clk_aux_roundr(struct clk_hw *hw,
+ unsigned long *rate,
unsigned long *parent_rate)
{
struct alchemy_auxpll_clk *a = to_auxpll_clk(hw);
unsigned long mult;
- if (!rate || !*parent_rate)
+ if (!*rate || !*parent_rate) {
+ *rate = 0;
return 0;
+ }
- mult = rate / (*parent_rate);
+ mult = *rate / (*parent_rate);
if (mult && (mult < 7))
mult = 7;
if (mult > a->maxmult)
mult = a->maxmult;
- return (*parent_rate) * mult;
+ *rate = (*parent_rate) * mult;
+ return 0;
}
static struct clk_ops alchemy_clkops_aux = {
diff --git a/drivers/clk/at91/clk-h32mx.c b/drivers/clk/at91/clk-h32mx.c
index 152dcb3..e48f31e 100644
--- a/drivers/clk/at91/clk-h32mx.c
+++ b/drivers/clk/at91/clk-h32mx.c
@@ -49,21 +49,25 @@ static unsigned long clk_sama5d4_h32mx_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
-static long clk_sama5d4_h32mx_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_sama5d4_h32mx_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
- if (rate > *parent_rate)
- return *parent_rate;
- div = *parent_rate / 2;
- if (rate < div)
- return div;
+ if (*rate > *parent_rate) {
+ *rate = *parent_rate;
+ return 0;
+ }
- if (rate - div < *parent_rate - rate)
- return div;
+ div = *parent_rate / 2;
+ if (*rate < div || (*rate - div) < (*parent_rate - *rate)) {
+ *rate = div;
+ return 0;
+ }
- return *parent_rate;
+ *rate = *parent_rate;
+ return 0;
}
static int clk_sama5d4_h32mx_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/at91/clk-peripheral.c b/drivers/clk/at91/clk-peripheral.c
index 597fed4..d990ae0 100644
--- a/drivers/clk/at91/clk-peripheral.c
+++ b/drivers/clk/at91/clk-peripheral.c
@@ -227,9 +227,9 @@ clk_sam9x5_peripheral_recalc_rate(struct clk_hw *hw,
return parent_rate >> periph->div;
}
-static long clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long *parent_rate)
+static int clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
int shift = 0;
unsigned long best_rate;
@@ -238,8 +238,10 @@ static long clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
unsigned long cur_diff;
struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw);
- if (periph->id < PERIPHERAL_ID_MIN || !periph->range.max)
- return *parent_rate;
+ if (periph->id < PERIPHERAL_ID_MIN || !periph->range.max) {
+ *rate = *parent_rate;
+ return 0;
+ }
if (periph->range.max) {
for (; shift < PERIPHERAL_MAX_SHIFT; shift++) {
@@ -249,28 +251,31 @@ static long clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
}
}
- if (rate >= cur_rate)
- return cur_rate;
+ if (*rate >= cur_rate) {
+ *rate = cur_rate;
+ return 0;
+ }
- best_diff = cur_rate - rate;
+ best_diff = cur_rate - *rate;
best_rate = cur_rate;
for (; shift < PERIPHERAL_MAX_SHIFT; shift++) {
cur_rate = *parent_rate >> shift;
- if (cur_rate < rate)
- cur_diff = rate - cur_rate;
+ if (cur_rate < *rate)
+ cur_diff = *rate - cur_rate;
else
- cur_diff = cur_rate - rate;
+ cur_diff = cur_rate - *rate;
if (cur_diff < best_diff) {
best_diff = cur_diff;
best_rate = cur_rate;
}
- if (!best_diff || cur_rate < rate)
+ if (!best_diff || cur_rate < *rate)
break;
}
- return best_rate;
+ *rate = best_rate;
+ return 0;
}
static int clk_sam9x5_peripheral_set_rate(struct clk_hw *hw,
diff --git a/drivers/clk/at91/clk-pll.c b/drivers/clk/at91/clk-pll.c
index 6ec79db..e7754eb 100644
--- a/drivers/clk/at91/clk-pll.c
+++ b/drivers/clk/at91/clk-pll.c
@@ -260,13 +260,19 @@ static long clk_pll_get_best_div_mul(struct clk_pll *pll, unsigned long rate,
return bestrate;
}
-static long clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct clk_pll *pll = to_clk_pll(hw);
+ long ret;
- return clk_pll_get_best_div_mul(pll, rate, *parent_rate,
- NULL, NULL, NULL);
+ ret = clk_pll_get_best_div_mul(pll, *rate, *parent_rate,
+ NULL, NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
}
static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/at91/clk-plldiv.c b/drivers/clk/at91/clk-plldiv.c
index ea22656..c267214 100644
--- a/drivers/clk/at91/clk-plldiv.c
+++ b/drivers/clk/at91/clk-plldiv.c
@@ -36,21 +36,23 @@ static unsigned long clk_plldiv_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
-static long clk_plldiv_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_plldiv_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
- if (rate > *parent_rate)
- return *parent_rate;
- div = *parent_rate / 2;
- if (rate < div)
- return div;
+ if (*rate > *parent_rate) {
+ *rate = *parent_rate;
+ return 0;
+ }
- if (rate - div < *parent_rate - rate)
- return div;
+ div = *parent_rate / 2;
+ if (*rate < div || (*rate - div) < (*parent_rate - *rate))
+ *rate = div;
+ else
+ *rate = *parent_rate;
- return *parent_rate;
+ return 0;
}
static int clk_plldiv_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/at91/clk-smd.c b/drivers/clk/at91/clk-smd.c
index 144d47e..cd0f6d2 100644
--- a/drivers/clk/at91/clk-smd.c
+++ b/drivers/clk/at91/clk-smd.c
@@ -43,26 +43,32 @@ static unsigned long at91sam9x5_clk_smd_recalc_rate(struct clk_hw *hw,
return parent_rate / (smddiv + 1);
}
-static long at91sam9x5_clk_smd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int at91sam9x5_clk_smd_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
unsigned long bestrate;
unsigned long tmp;
- if (rate >= *parent_rate)
- return *parent_rate;
+ if (*rate >= *parent_rate) {
+ *rate = *parent_rate;
+ return 0;
+ }
- div = *parent_rate / rate;
- if (div > SMD_MAX_DIV)
- return *parent_rate / (SMD_MAX_DIV + 1);
+ div = *parent_rate / *rate;
+ if (div > SMD_MAX_DIV) {
+ *rate = *parent_rate / (SMD_MAX_DIV + 1);
+ return 0;
+ }
bestrate = *parent_rate / div;
tmp = *parent_rate / (div + 1);
- if (bestrate - rate > rate - tmp)
+ if (bestrate - *rate > *rate - tmp)
bestrate = tmp;
- return bestrate;
+ *rate = bestrate;
+ return 0;
}
static int at91sam9x5_clk_smd_set_parent(struct clk_hw *hw, u8 index)
diff --git a/drivers/clk/at91/clk-usb.c b/drivers/clk/at91/clk-usb.c
index a23ac0c..02599e6 100644
--- a/drivers/clk/at91/clk-usb.c
+++ b/drivers/clk/at91/clk-usb.c
@@ -56,22 +56,26 @@ static unsigned long at91sam9x5_clk_usb_recalc_rate(struct clk_hw *hw,
return DIV_ROUND_CLOSEST(parent_rate, (usbdiv + 1));
}
-static long at91sam9x5_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int at91sam9x5_clk_usb_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
- if (!rate)
+ if (!*rate)
return -EINVAL;
- if (rate >= *parent_rate)
- return *parent_rate;
+ if (*rate >= *parent_rate) {
+ *rate = *parent_rate;
+ return 0;
+ }
- div = DIV_ROUND_CLOSEST(*parent_rate, rate);
+ div = DIV_ROUND_CLOSEST(*parent_rate, *rate);
if (div > SAM9X5_USB_MAX_DIV + 1)
div = SAM9X5_USB_MAX_DIV + 1;
- return DIV_ROUND_CLOSEST(*parent_rate, div);
+ *rate = DIV_ROUND_CLOSEST(*parent_rate, div);
+ return 0;
}
static int at91sam9x5_clk_usb_set_parent(struct clk_hw *hw, u8 index)
@@ -235,8 +239,9 @@ static unsigned long at91rm9200_clk_usb_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long at91rm9200_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int at91rm9200_clk_usb_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
struct at91rm9200_clk_usb *usb = to_at91rm9200_clk_usb(hw);
struct clk *parent = __clk_get_parent(hw->clk);
@@ -252,13 +257,13 @@ static long at91rm9200_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
if (!usb->divisors[i])
continue;
- tmp_parent_rate = rate * usb->divisors[i];
+ tmp_parent_rate = *rate * usb->divisors[i];
tmp_parent_rate = __clk_round_rate(parent, tmp_parent_rate);
tmprate = DIV_ROUND_CLOSEST(tmp_parent_rate, usb->divisors[i]);
- if (tmprate < rate)
- tmpdiff = rate - tmprate;
+ if (tmprate < *rate)
+ tmpdiff = *rate - tmprate;
else
- tmpdiff = tmprate - rate;
+ tmpdiff = tmprate - *rate;
if (bestdiff < 0 || bestdiff > tmpdiff) {
bestrate = tmprate;
@@ -270,7 +275,8 @@ static long at91rm9200_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
break;
}
- return bestrate;
+ *rate = bestrate;
+ return 0;
}
static int at91rm9200_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-axi-clkgen.c b/drivers/clk/clk-axi-clkgen.c
index e619285..3509d50 100644
--- a/drivers/clk/clk-axi-clkgen.c
+++ b/drivers/clk/clk-axi-clkgen.c
@@ -405,7 +405,7 @@ static int axi_clkgen_set_rate(struct clk_hw *clk_hw,
return 0;
}
-static long axi_clkgen_round_rate(struct clk_hw *hw, unsigned long rate,
+static int axi_clkgen_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
unsigned int d, m, dout;
@@ -415,7 +415,8 @@ static long axi_clkgen_round_rate(struct clk_hw *hw, unsigned long rate,
if (d == 0 || dout == 0 || m == 0)
return -EINVAL;
- return *parent_rate / d * m / dout;
+ *rate = *parent_rate / d * m / dout;
+ return 0;
}
static unsigned long axi_clkgen_recalc_rate(struct clk_hw *clk_hw,
diff --git a/drivers/clk/clk-cdce706.c b/drivers/clk/clk-cdce706.c
index c386ad2..f110959 100644
--- a/drivers/clk/clk-cdce706.c
+++ b/drivers/clk/clk-cdce706.c
@@ -187,8 +187,8 @@ static unsigned long cdce706_pll_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long cdce706_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cdce706_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct cdce706_hw_data *hwd = to_hw_data(hw);
unsigned long mul, div;
@@ -196,9 +196,9 @@ static long cdce706_pll_round_rate(struct clk_hw *hw, unsigned long rate,
dev_dbg(&hwd->dev_data->client->dev,
"%s, rate: %lu, parent_rate: %lu\n",
- __func__, rate, *parent_rate);
+ __func__, *rate, *parent_rate);
- rational_best_approximation(rate, *parent_rate,
+ rational_best_approximation(*rate, *parent_rate,
CDCE706_PLL_N_MAX, CDCE706_PLL_M_MAX,
&mul, &div);
hwd->mul = mul;
@@ -210,7 +210,8 @@ static long cdce706_pll_round_rate(struct clk_hw *hw, unsigned long rate,
res = (u64)*parent_rate * hwd->mul;
do_div(res, hwd->div);
- return res;
+ *rate = res;
+ return 0;
}
static int cdce706_pll_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -292,8 +293,8 @@ static unsigned long cdce706_divider_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cdce706_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct cdce706_hw_data *hwd = to_hw_data(hw);
struct cdce706_dev_data *cdce = hwd->dev_data;
@@ -301,31 +302,31 @@ static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
dev_dbg(&hwd->dev_data->client->dev,
"%s, rate: %lu, parent_rate: %lu\n",
- __func__, rate, *parent_rate);
+ __func__, *rate, *parent_rate);
- rational_best_approximation(rate, *parent_rate,
+ rational_best_approximation(*rate, *parent_rate,
1, CDCE706_DIVIDER_DIVIDER_MAX,
&mul, &div);
if (!mul)
div = CDCE706_DIVIDER_DIVIDER_MAX;
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
- unsigned long best_diff = rate;
+ unsigned long best_diff = *rate;
unsigned long best_div = 0;
struct clk *gp_clk = cdce->clkin_clk[cdce->clkin[0].parent];
unsigned long gp_rate = gp_clk ? clk_get_rate(gp_clk) : 0;
- for (div = CDCE706_PLL_FREQ_MIN / rate; best_diff &&
- div <= CDCE706_PLL_FREQ_MAX / rate; ++div) {
+ for (div = CDCE706_PLL_FREQ_MIN / *rate; best_diff &&
+ div <= CDCE706_PLL_FREQ_MAX / *rate; ++div) {
unsigned long n, m;
unsigned long diff;
unsigned long div_rate;
u64 div_rate64;
- if (rate * div < CDCE706_PLL_FREQ_MIN)
+ if (*rate * div < CDCE706_PLL_FREQ_MIN)
continue;
- rational_best_approximation(rate * div, gp_rate,
+ rational_best_approximation(*rate * div, gp_rate,
CDCE706_PLL_N_MAX,
CDCE706_PLL_M_MAX,
&n, &m);
@@ -333,7 +334,7 @@ static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
do_div(div_rate64, m);
do_div(div_rate64, div);
div_rate = div_rate64;
- diff = max(div_rate, rate) - min(div_rate, rate);
+ diff = max(div_rate, *rate) - min(div_rate, *rate);
if (diff < best_diff) {
best_diff = diff;
@@ -348,8 +349,8 @@ static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
dev_dbg(&hwd->dev_data->client->dev,
"%s, altering parent rate: %lu -> %lu\n",
- __func__, *parent_rate, rate * div);
- *parent_rate = rate * div;
+ __func__, *parent_rate, *rate * div);
+ *parent_rate = *rate * div;
}
hwd->div = div;
@@ -357,7 +358,8 @@ static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
"%s, divider: %d, div: %lu\n",
__func__, hwd->idx, div);
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int cdce706_divider_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -425,11 +427,11 @@ static unsigned long cdce706_clkout_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
-static long cdce706_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cdce706_clkout_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
- *parent_rate = rate;
- return rate;
+ *parent_rate = *rate;
+ return 0;
}
static int cdce706_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c
index 956b7e5..f56a71d 100644
--- a/drivers/clk/clk-composite.c
+++ b/drivers/clk/clk-composite.c
@@ -68,10 +68,10 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
struct clk_hw *mux_hw = composite->mux_hw;
struct clk *parent;
unsigned long parent_rate;
- long tmp_rate, best_rate = 0;
+ unsigned long tmp_rate, best_rate = 0;
unsigned long rate_diff;
unsigned long best_rate_diff = ULONG_MAX;
- int i;
+ int ret, i;
if (rate_hw && rate_ops && rate_ops->determine_rate) {
__clk_hw_set_clk(rate_hw, hw);
@@ -88,8 +88,12 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
*best_parent_p = __clk_get_hw(parent);
*best_parent_rate = __clk_get_rate(parent);
- return rate_ops->round_rate(rate_hw, rate,
- best_parent_rate);
+ ret = rate_ops->round_rate(rate_hw, &rate,
+ best_parent_rate);
+ if (ret)
+ return ret;
+
+ return rate;
}
for (i = 0; i < __clk_get_num_parents(mux_hw->clk); i++) {
@@ -99,9 +103,10 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
parent_rate = __clk_get_rate(parent);
- tmp_rate = rate_ops->round_rate(rate_hw, rate,
- &parent_rate);
- if (tmp_rate < 0)
+ tmp_rate = rate;
+ ret = rate_ops->round_rate(rate_hw, &tmp_rate,
+ &parent_rate);
+ if (ret < 0)
continue;
rate_diff = abs(rate - tmp_rate);
@@ -130,8 +135,8 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
}
}
-static long clk_composite_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_composite_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_composite *composite = to_clk_composite(hw);
const struct clk_ops *rate_ops = composite->rate_ops;
diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index 25006a8..f646a0c 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -329,19 +329,20 @@ static int clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
return bestdiv;
}
-long divider_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate, const struct clk_div_table *table,
- u8 width, unsigned long flags)
+int divider_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate, const struct clk_div_table *table,
+ u8 width, unsigned long flags)
{
int div;
- div = clk_divider_bestdiv(hw, rate, prate, table, width, flags);
+ div = clk_divider_bestdiv(hw, *rate, prate, table, width, flags);
- return DIV_ROUND_UP(*prate, div);
+ *rate = DIV_ROUND_UP(*prate, div);
+ return 0;
}
EXPORT_SYMBOL_GPL(divider_round_rate);
-static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_divider *divider = to_clk_divider(hw);
@@ -352,7 +353,8 @@ static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
bestdiv = readl(divider->reg) >> divider->shift;
bestdiv &= div_mask(divider->width);
bestdiv = _get_div(divider->table, bestdiv, divider->flags);
- return DIV_ROUND_UP(*prate, bestdiv);
+ *rate = DIV_ROUND_UP(*prate, bestdiv);
+ return 0;
}
return divider_round_rate(hw, rate, prate, divider->table,
diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.c
index d9e3f67..ff936d0 100644
--- a/drivers/clk/clk-fixed-factor.c
+++ b/drivers/clk/clk-fixed-factor.c
@@ -36,7 +36,7 @@ static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
return (unsigned long)rate;
}
-static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_factor_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_fixed_factor *fix = to_clk_fixed_factor(hw);
@@ -44,12 +44,13 @@ static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
unsigned long best_parent;
- best_parent = (rate / fix->mult) * fix->div;
+ best_parent = (*rate / fix->mult) * fix->div;
*prate = __clk_round_rate(__clk_get_parent(hw->clk),
best_parent);
}
- return (*prate / fix->div) * fix->mult;
+ *rate = (*prate / fix->div) * fix->mult;
+ return 0;
}
static int clk_factor_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c
index 6aa72d9..1f1ba3e 100644
--- a/drivers/clk/clk-fractional-divider.c
+++ b/drivers/clk/clk-fractional-divider.c
@@ -45,24 +45,26 @@ static unsigned long clk_fd_recalc_rate(struct clk_hw *hw,
return ret;
}
-static long clk_fd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_fd_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_fractional_divider *fd = to_clk_fd(hw);
unsigned maxn = (fd->nmask >> fd->nshift) + 1;
unsigned div;
- if (!rate || rate >= *prate)
- return *prate;
+ if (!*rate || *rate >= *prate) {
+ *rate = *prate;
+ return 0;
+ }
- div = gcd(*prate, rate);
+ div = gcd(*prate, *rate);
while ((*prate / div) > maxn) {
div <<= 1;
- rate <<= 1;
+ *rate <<= 1;
}
- return rate;
+ return 0;
}
static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-highbank.c b/drivers/clk/clk-highbank.c
index 2e7e9d9..f26d1b0 100644
--- a/drivers/clk/clk-highbank.c
+++ b/drivers/clk/clk-highbank.c
@@ -142,15 +142,16 @@ static void clk_pll_calc(unsigned long rate, unsigned long ref_freq,
*pdivf = divf;
}
-static long clk_pll_round_rate(struct clk_hw *hwclk, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_pll_round_rate(struct clk_hw *hwclk, unsigned long *rate,
+ unsigned long *parent_rate)
{
u32 divq, divf;
unsigned long ref_freq = *parent_rate;
- clk_pll_calc(rate, ref_freq, &divq, &divf);
+ clk_pll_calc(*rate, ref_freq, &divq, &divf);
- return (ref_freq * (divf + 1)) / (1 << divq);
+ *rate = (ref_freq * (divf + 1)) / (1 << divq);
+ return 0;
}
static int clk_pll_set_rate(struct clk_hw *hwclk, unsigned long rate,
@@ -239,16 +240,17 @@ static unsigned long clk_periclk_recalc_rate(struct clk_hw *hwclk,
return parent_rate / div;
}
-static long clk_periclk_round_rate(struct clk_hw *hwclk, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_periclk_round_rate(struct clk_hw *hwclk, unsigned long *rate,
+ unsigned long *parent_rate)
{
u32 div;
- div = *parent_rate / rate;
+ div = *parent_rate / *rate;
div++;
div &= ~0x1;
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int clk_periclk_set_rate(struct clk_hw *hwclk, unsigned long rate,
diff --git a/drivers/clk/clk-si5351.c b/drivers/clk/clk-si5351.c
index 3b2a66f..8fad555 100644
--- a/drivers/clk/clk-si5351.c
+++ b/drivers/clk/clk-si5351.c
@@ -446,30 +446,30 @@ static unsigned long si5351_pll_recalc_rate(struct clk_hw *hw,
return (unsigned long)rate;
}
-static long si5351_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int si5351_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct si5351_hw_data *hwdata =
container_of(hw, struct si5351_hw_data, hw);
unsigned long rfrac, denom, a, b, c;
unsigned long long lltmp;
- if (rate < SI5351_PLL_VCO_MIN)
- rate = SI5351_PLL_VCO_MIN;
- if (rate > SI5351_PLL_VCO_MAX)
- rate = SI5351_PLL_VCO_MAX;
+ if (*rate < SI5351_PLL_VCO_MIN)
+ *rate = SI5351_PLL_VCO_MIN;
+ if (*rate > SI5351_PLL_VCO_MAX)
+ *rate = SI5351_PLL_VCO_MAX;
/* determine integer part of feedback equation */
- a = rate / *parent_rate;
+ a = *rate / *parent_rate;
if (a < SI5351_PLL_A_MIN)
- rate = *parent_rate * SI5351_PLL_A_MIN;
+ *rate = *parent_rate * SI5351_PLL_A_MIN;
if (a > SI5351_PLL_A_MAX)
- rate = *parent_rate * SI5351_PLL_A_MAX;
+ *rate = *parent_rate * SI5351_PLL_A_MAX;
/* find best approximation for b/c = fVCO mod fIN */
denom = 1000 * 1000;
- lltmp = rate % (*parent_rate);
+ lltmp = *rate % (*parent_rate);
lltmp *= denom;
do_div(lltmp, *parent_rate);
rfrac = (unsigned long)lltmp;
@@ -492,15 +492,15 @@ static long si5351_pll_round_rate(struct clk_hw *hw, unsigned long rate,
lltmp *= b;
do_div(lltmp, c);
- rate = (unsigned long)lltmp;
- rate += *parent_rate * a;
+ *rate = (unsigned long)lltmp;
+ *rate += *parent_rate * a;
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: a = %lu, b = %lu, c = %lu, parent_rate = %lu, rate = %lu\n",
__func__, __clk_get_name(hwdata->hw.clk), a, b, c,
- *parent_rate, rate);
+ *parent_rate, *rate);
- return rate;
+ return 0;
}
static int si5351_pll_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -639,8 +639,8 @@ static unsigned long si5351_msynth_recalc_rate(struct clk_hw *hw,
return (unsigned long)rate;
}
-static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int si5351_msynth_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct si5351_hw_data *hwdata =
container_of(hw, struct si5351_hw_data, hw);
@@ -649,17 +649,17 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
int divby4;
/* multisync6-7 can only handle freqencies < 150MHz */
- if (hwdata->num >= 6 && rate > SI5351_MULTISYNTH67_MAX_FREQ)
- rate = SI5351_MULTISYNTH67_MAX_FREQ;
+ if (hwdata->num >= 6 && *rate > SI5351_MULTISYNTH67_MAX_FREQ)
+ *rate = SI5351_MULTISYNTH67_MAX_FREQ;
/* multisync frequency is 1MHz .. 160MHz */
- if (rate > SI5351_MULTISYNTH_MAX_FREQ)
- rate = SI5351_MULTISYNTH_MAX_FREQ;
- if (rate < SI5351_MULTISYNTH_MIN_FREQ)
- rate = SI5351_MULTISYNTH_MIN_FREQ;
+ if (*rate > SI5351_MULTISYNTH_MAX_FREQ)
+ *rate = SI5351_MULTISYNTH_MAX_FREQ;
+ if (*rate < SI5351_MULTISYNTH_MIN_FREQ)
+ *rate = SI5351_MULTISYNTH_MIN_FREQ;
divby4 = 0;
- if (rate > SI5351_MULTISYNTH_DIVBY4_FREQ)
+ if (*rate > SI5351_MULTISYNTH_DIVBY4_FREQ)
divby4 = 1;
/* multisync can set pll */
@@ -670,7 +670,7 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
*/
if (divby4 == 0) {
lltmp = SI5351_PLL_VCO_MAX;
- do_div(lltmp, rate);
+ do_div(lltmp, *rate);
a = (unsigned long)lltmp;
} else
a = 4;
@@ -678,18 +678,18 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
b = 0;
c = 1;
- *parent_rate = a * rate;
+ *parent_rate = a * *rate;
} else {
unsigned long rfrac, denom;
/* disable divby4 */
if (divby4) {
- rate = SI5351_MULTISYNTH_DIVBY4_FREQ;
+ *rate = SI5351_MULTISYNTH_DIVBY4_FREQ;
divby4 = 0;
}
/* determine integer part of divider equation */
- a = *parent_rate / rate;
+ a = *parent_rate / *rate;
if (a < SI5351_MULTISYNTH_A_MIN)
a = SI5351_MULTISYNTH_A_MIN;
if (hwdata->num >= 6 && a > SI5351_MULTISYNTH67_A_MAX)
@@ -699,9 +699,9 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
/* find best approximation for b/c = fVCO mod fOUT */
denom = 1000 * 1000;
- lltmp = (*parent_rate) % rate;
+ lltmp = (*parent_rate) % *rate;
lltmp *= denom;
- do_div(lltmp, rate);
+ do_div(lltmp, *rate);
rfrac = (unsigned long)lltmp;
b = 0;
@@ -716,7 +716,7 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
lltmp = *parent_rate;
lltmp *= c;
do_div(lltmp, a * c + b);
- rate = (unsigned long)lltmp;
+ *rate = (unsigned long)lltmp;
/* calculate parameters */
if (divby4) {
@@ -734,9 +734,9 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: a = %lu, b = %lu, c = %lu, divby4 = %d, parent_rate = %lu, rate = %lu\n",
__func__, __clk_get_name(hwdata->hw.clk), a, b, c, divby4,
- *parent_rate, rate);
+ *parent_rate, *rate);
- return rate;
+ return 0;
}
static int si5351_msynth_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -983,57 +983,57 @@ static unsigned long si5351_clkout_recalc_rate(struct clk_hw *hw,
return parent_rate >> rdiv;
}
-static long si5351_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int si5351_clkout_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct si5351_hw_data *hwdata =
container_of(hw, struct si5351_hw_data, hw);
unsigned char rdiv;
/* clkout6/7 can only handle output freqencies < 150MHz */
- if (hwdata->num >= 6 && rate > SI5351_CLKOUT67_MAX_FREQ)
- rate = SI5351_CLKOUT67_MAX_FREQ;
+ if (hwdata->num >= 6 && *rate > SI5351_CLKOUT67_MAX_FREQ)
+ *rate = SI5351_CLKOUT67_MAX_FREQ;
/* clkout freqency is 8kHz - 160MHz */
- if (rate > SI5351_CLKOUT_MAX_FREQ)
- rate = SI5351_CLKOUT_MAX_FREQ;
- if (rate < SI5351_CLKOUT_MIN_FREQ)
- rate = SI5351_CLKOUT_MIN_FREQ;
+ if (*rate > SI5351_CLKOUT_MAX_FREQ)
+ *rate = SI5351_CLKOUT_MAX_FREQ;
+ if (*rate < SI5351_CLKOUT_MIN_FREQ)
+ *rate = SI5351_CLKOUT_MIN_FREQ;
/* request frequency if multisync master */
if (__clk_get_flags(hwdata->hw.clk) & CLK_SET_RATE_PARENT) {
/* use r divider for frequencies below 1MHz */
rdiv = SI5351_OUTPUT_CLK_DIV_1;
- while (rate < SI5351_MULTISYNTH_MIN_FREQ &&
+ while (*rate < SI5351_MULTISYNTH_MIN_FREQ &&
rdiv < SI5351_OUTPUT_CLK_DIV_128) {
rdiv += 1;
- rate *= 2;
+ *rate *= 2;
}
- *parent_rate = rate;
+ *parent_rate = *rate;
} else {
unsigned long new_rate, new_err, err;
/* round to closed rdiv */
rdiv = SI5351_OUTPUT_CLK_DIV_1;
new_rate = *parent_rate;
- err = abs(new_rate - rate);
+ err = abs(new_rate - *rate);
do {
new_rate >>= 1;
- new_err = abs(new_rate - rate);
+ new_err = abs(new_rate - *rate);
if (new_err > err || rdiv == SI5351_OUTPUT_CLK_DIV_128)
break;
rdiv++;
err = new_err;
} while (1);
}
- rate = *parent_rate >> rdiv;
+ *rate = *parent_rate >> rdiv;
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: rdiv = %u, parent_rate = %lu, rate = %lu\n",
__func__, __clk_get_name(hwdata->hw.clk), (1 << rdiv),
- *parent_rate, rate);
+ *parent_rate, *rate);
- return rate;
+ return 0;
}
static int si5351_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-si570.c b/drivers/clk/clk-si570.c
index fc167b3..0680863 100644
--- a/drivers/clk/clk-si570.c
+++ b/drivers/clk/clk-si570.c
@@ -245,7 +245,7 @@ static unsigned long si570_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long si570_round_rate(struct clk_hw *hw, unsigned long rate,
+static int si570_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
int err;
@@ -253,26 +253,26 @@ static long si570_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned int n1, hs_div;
struct clk_si570 *data = to_clk_si570(hw);
- if (!rate)
+ if (!*rate)
return 0;
- if (div64_u64(abs(rate - data->frequency) * 10000LL,
+ if (div64_u64(abs(*rate - data->frequency) * 10000LL,
data->frequency) < 35) {
- rfreq = div64_u64((data->rfreq * rate) +
+ rfreq = div64_u64((data->rfreq * *rate) +
div64_u64(data->frequency, 2), data->frequency);
n1 = data->n1;
hs_div = data->hs_div;
} else {
- err = si570_calc_divs(rate, data, &rfreq, &n1, &hs_div);
+ err = si570_calc_divs(*rate, data, &rfreq, &n1, &hs_div);
if (err) {
dev_err(&data->i2c_client->dev,
"unable to round rate\n");
- return 0;
+ *rate = 0;
}
}
- return rate;
+ return 0;
}
/**
diff --git a/drivers/clk/clk-u300.c b/drivers/clk/clk-u300.c
index 406bfc1..5e3163b 100644
--- a/drivers/clk/clk-u300.c
+++ b/drivers/clk/clk-u300.c
@@ -628,22 +628,27 @@ syscon_clk_recalc_rate(struct clk_hw *hw,
}
}
-static long
-syscon_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int
+syscon_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_syscon *sclk = to_syscon(hw);
- if (sclk->clk_val != U300_SYSCON_SBCER_CPU_CLK_EN)
- return *prate;
+ if (sclk->clk_val != U300_SYSCON_SBCER_CPU_CLK_EN) {
+ *rate = *prate;
+ return 0;
+ }
/* We really only support setting the rate of the CPU clock */
- if (rate <= 13000000)
- return 13000000;
- if (rate <= 52000000)
- return 52000000;
- if (rate <= 104000000)
- return 104000000;
- return 208000000;
+ if (*rate <= 13000000)
+ *rate = 13000000;
+ else if (*rate <= 52000000)
+ *rate = 52000000;
+ else if (*rate <= 104000000)
+ *rate = 104000000;
+ else
+ *rate = 208000000;
+
+ return 0;
}
static int syscon_clk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -1037,26 +1042,28 @@ mclk_clk_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
-static long
-mclk_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int
+mclk_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
- if (rate <= 18900000)
- return 18900000;
- if (rate <= 20800000)
- return 20800000;
- if (rate <= 23100000)
- return 23100000;
- if (rate <= 26000000)
- return 26000000;
- if (rate <= 29700000)
- return 29700000;
- if (rate <= 34700000)
- return 34700000;
- if (rate <= 41600000)
- return 41600000;
- /* Highest rate */
- return 52000000;
+ if (*rate <= 18900000)
+ *rate = 18900000;
+ else if (*rate <= 20800000)
+ *rate = 20800000;
+ else if (*rate <= 23100000)
+ *rate = 23100000;
+ else if (*rate <= 26000000)
+ *rate = 26000000;
+ else if (*rate <= 29700000)
+ *rate = 29700000;
+ else if (*rate <= 34700000)
+ *rate = 34700000;
+ else if (*rate <= 41600000)
+ *rate = 41600000;
+ else
+ *rate = 52000000;
+
+ return 0;
}
static int mclk_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-vt8500.c b/drivers/clk/clk-vt8500.c
index 37e9288..221eec3 100644
--- a/drivers/clk/clk-vt8500.c
+++ b/drivers/clk/clk-vt8500.c
@@ -137,19 +137,19 @@ static unsigned long vt8500_dclk_recalc_rate(struct clk_hw *hw,
return parent_rate / div;
}
-static long vt8500_dclk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int vt8500_dclk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_device *cdev = to_clk_device(hw);
u32 divisor;
- if (rate == 0)
+ if (*rate == 0)
return 0;
- divisor = *prate / rate;
+ divisor = *prate / *rate;
/* If prate / rate would be decimal, incr the divisor */
- if (rate * divisor < *prate)
+ if (*rate * divisor < *prate)
divisor++;
/*
@@ -160,7 +160,8 @@ static long vt8500_dclk_round_rate(struct clk_hw *hw, unsigned long rate,
divisor = 64 * ((divisor / 64) + 1);
}
- return *prate / divisor;
+ *rate = *prate / divisor;
+ return 0;
}
static int vt8500_dclk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -579,8 +580,8 @@ static int vtwm_pll_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
-static long vtwm_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int vtwm_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_pll *pll = to_clk_pll(hw);
u32 filter, mul, div1, div2;
@@ -588,26 +589,28 @@ static long vtwm_pll_round_rate(struct clk_hw *hw, unsigned long rate,
switch (pll->type) {
case PLL_TYPE_VT8500:
- vt8500_find_pll_bits(rate, *prate, &mul, &div1);
+ vt8500_find_pll_bits(*rate, *prate, &mul, &div1);
round_rate = VT8500_BITS_TO_FREQ(*prate, mul, div1);
break;
case PLL_TYPE_WM8650:
- wm8650_find_pll_bits(rate, *prate, &mul, &div1, &div2);
+ wm8650_find_pll_bits(*rate, *prate, &mul, &div1, &div2);
round_rate = WM8650_BITS_TO_FREQ(*prate, mul, div1, div2);
break;
case PLL_TYPE_WM8750:
- wm8750_find_pll_bits(rate, *prate, &filter, &mul, &div1, &div2);
+ wm8750_find_pll_bits(*rate, *prate, &filter, &mul, &div1,
+ &div2);
round_rate = WM8750_BITS_TO_FREQ(*prate, mul, div1, div2);
break;
case PLL_TYPE_WM8850:
- wm8850_find_pll_bits(rate, *prate, &mul, &div1, &div2);
+ wm8850_find_pll_bits(*rate, *prate, &mul, &div1, &div2);
round_rate = WM8850_BITS_TO_FREQ(*prate, mul, div1, div2);
break;
default:
round_rate = 0;
}
- return round_rate;
+ *rate = round_rate;
+ return 0;
}
static unsigned long vtwm_pll_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/clk-wm831x.c b/drivers/clk/clk-wm831x.c
index ef67719..23db1b5 100644
--- a/drivers/clk/clk-wm831x.c
+++ b/drivers/clk/clk-wm831x.c
@@ -142,18 +142,19 @@ static unsigned long wm831x_fll_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long wm831x_fll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *unused)
+static int wm831x_fll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *unused)
{
int best = 0;
int i;
for (i = 0; i < ARRAY_SIZE(wm831x_fll_auto_rates); i++)
- if (abs(wm831x_fll_auto_rates[i] - rate) <
- abs(wm831x_fll_auto_rates[best] - rate))
+ if (abs(wm831x_fll_auto_rates[i] - *rate) <
+ abs(wm831x_fll_auto_rates[best] - *rate))
best = i;
- return wm831x_fll_auto_rates[best];
+ *rate = wm831x_fll_auto_rates[best];
+ return 0;
}
static int wm831x_fll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-xgene.c b/drivers/clk/clk-xgene.c
index dd8a62d..27460e3 100644
--- a/drivers/clk/clk-xgene.c
+++ b/drivers/clk/clk-xgene.c
@@ -367,7 +367,7 @@ static int xgene_clk_set_rate(struct clk_hw *hw, unsigned long rate,
return parent_rate / divider_save;
}
-static long xgene_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int xgene_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct xgene_clk *pclk = to_xgene_clk(hw);
@@ -376,14 +376,15 @@ static long xgene_clk_round_rate(struct clk_hw *hw, unsigned long rate,
if (pclk->param.divider_reg) {
/* Let's compute the divider */
- if (rate > parent_rate)
- rate = parent_rate;
- divider = parent_rate / rate; /* Rounded down */
+ if (*rate > parent_rate)
+ *rate = parent_rate;
+ divider = parent_rate / *rate; /* Rounded down */
} else {
divider = 1;
}
- return parent_rate / divider;
+ *rate = parent_rate / divider;
+ return 0;
}
const struct clk_ops xgene_clk_ops = {
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index fa5a00e..1462ddc 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1146,9 +1146,12 @@ static unsigned long clk_core_round_rate_nolock(struct clk_core *clk,
return clk->ops->determine_rate(clk->hw, rate,
min_rate, max_rate,
&parent_rate, &parent_hw);
- } else if (clk->ops->round_rate)
- return clk->ops->round_rate(clk->hw, rate, &parent_rate);
- else if (clk->flags & CLK_SET_RATE_PARENT)
+ } else if (clk->ops->round_rate) {
+ if (clk->ops->round_rate(clk->hw, &rate, &parent_rate))
+ return 0;
+
+ return rate;
+ } else if (clk->flags & CLK_SET_RATE_PARENT)
return clk_core_round_rate_nolock(clk->parent, rate, min_rate,
max_rate);
else
@@ -1640,8 +1643,10 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *clk,
&parent_hw);
parent = parent_hw ? parent_hw->core : NULL;
} else if (clk->ops->round_rate) {
- new_rate = clk->ops->round_rate(clk->hw, rate,
- &best_parent_rate);
+ if (clk->ops->round_rate(clk->hw, &new_rate,
+ &best_parent_rate))
+ return NULL;
+
if (new_rate < min_rate || new_rate > max_rate)
return NULL;
} else if (!parent || !(clk->flags & CLK_SET_RATE_PARENT)) {
diff --git a/drivers/clk/mmp/clk-frac.c b/drivers/clk/mmp/clk-frac.c
index 584a992..6652983 100644
--- a/drivers/clk/mmp/clk-frac.c
+++ b/drivers/clk/mmp/clk-frac.c
@@ -24,7 +24,7 @@
#define to_clk_factor(hw) container_of(hw, struct mmp_clk_factor, hw)
-static long clk_factor_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_factor_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct mmp_clk_factor *factor = to_clk_factor(hw);
@@ -35,17 +35,19 @@ static long clk_factor_round_rate(struct clk_hw *hw, unsigned long drate,
prev_rate = rate;
rate = (((*prate / 10000) * factor->ftbl[i].den) /
(factor->ftbl[i].num * factor->masks->factor)) * 10000;
- if (rate > drate)
+ if (rate > *drate)
break;
}
if ((i == 0) || (i == factor->ftbl_cnt)) {
- return rate;
+ *drate = rate;
} else {
- if ((drate - prev_rate) > (rate - drate))
- return rate;
+ if ((*drate - prev_rate) > (rate - *drate))
+ *drate = rate;
else
- return prev_rate;
+ *drate = prev_rate;
}
+
+ return 0;
}
static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/mvebu/clk-corediv.c b/drivers/clk/mvebu/clk-corediv.c
index d1e5863..c5aee2f 100644
--- a/drivers/clk/mvebu/clk-corediv.c
+++ b/drivers/clk/mvebu/clk-corediv.c
@@ -132,19 +132,20 @@ static unsigned long clk_corediv_recalc_rate(struct clk_hw *hwclk,
return parent_rate / div;
}
-static long clk_corediv_round_rate(struct clk_hw *hwclk, unsigned long rate,
+static int clk_corediv_round_rate(struct clk_hw *hwclk, unsigned long *rate,
unsigned long *parent_rate)
{
/* Valid ratio are 1:4, 1:5, 1:6 and 1:8 */
u32 div;
- div = *parent_rate / rate;
+ div = *parent_rate / *rate;
if (div < 4)
div = 4;
else if (div > 6)
div = 8;
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int clk_corediv_set_rate(struct clk_hw *hwclk, unsigned long rate,
diff --git a/drivers/clk/mvebu/clk-cpu.c b/drivers/clk/mvebu/clk-cpu.c
index 3821a88..0279b50 100644
--- a/drivers/clk/mvebu/clk-cpu.c
+++ b/drivers/clk/mvebu/clk-cpu.c
@@ -57,19 +57,20 @@ static unsigned long clk_cpu_recalc_rate(struct clk_hw *hwclk,
return parent_rate / div;
}
-static long clk_cpu_round_rate(struct clk_hw *hwclk, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_cpu_round_rate(struct clk_hw *hwclk, unsigned long *rate,
+ unsigned long *parent_rate)
{
/* Valid ratio are 1:1, 1:2 and 1:3 */
u32 div;
- div = *parent_rate / rate;
+ div = *parent_rate / *rate;
if (div == 0)
div = 1;
else if (div > 3)
div = 3;
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int clk_cpu_off_set_rate(struct clk_hw *hwclk, unsigned long rate,
diff --git a/drivers/clk/mxs/clk-div.c b/drivers/clk/mxs/clk-div.c
index 90e1da9..3677e51 100644
--- a/drivers/clk/mxs/clk-div.c
+++ b/drivers/clk/mxs/clk-div.c
@@ -47,8 +47,8 @@ static unsigned long clk_div_recalc_rate(struct clk_hw *hw,
return div->ops->recalc_rate(&div->divider.hw, parent_rate);
}
-static long clk_div_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_div_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_div *div = to_clk_div(hw);
diff --git a/drivers/clk/mxs/clk-frac.c b/drivers/clk/mxs/clk-frac.c
index e6aa6b5..86fc3bb 100644
--- a/drivers/clk/mxs/clk-frac.c
+++ b/drivers/clk/mxs/clk-frac.c
@@ -49,18 +49,18 @@ static unsigned long clk_frac_recalc_rate(struct clk_hw *hw,
return (parent_rate >> frac->width) * div;
}
-static long clk_frac_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_frac_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_frac *frac = to_clk_frac(hw);
unsigned long parent_rate = *prate;
u32 div;
u64 tmp;
- if (rate > parent_rate)
+ if (*rate > parent_rate)
return -EINVAL;
- tmp = rate;
+ tmp = *rate;
tmp <<= frac->width;
do_div(tmp, parent_rate);
div = tmp;
@@ -68,7 +68,8 @@ static long clk_frac_round_rate(struct clk_hw *hw, unsigned long rate,
if (!div)
return -EINVAL;
- return (parent_rate >> frac->width) * div;
+ *rate = (parent_rate >> frac->width) * div;
+ return 0;
}
static int clk_frac_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/mxs/clk-ref.c b/drivers/clk/mxs/clk-ref.c
index 4adeed6..e0d6529 100644
--- a/drivers/clk/mxs/clk-ref.c
+++ b/drivers/clk/mxs/clk-ref.c
@@ -64,15 +64,15 @@ static unsigned long clk_ref_recalc_rate(struct clk_hw *hw,
return tmp;
}
-static long clk_ref_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_ref_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long parent_rate = *prate;
u64 tmp = parent_rate;
u8 frac;
- tmp = tmp * 18 + rate / 2;
- do_div(tmp, rate);
+ tmp = tmp * 18 + *rate / 2;
+ do_div(tmp, *rate);
frac = tmp;
if (frac < 18)
@@ -83,8 +83,9 @@ static long clk_ref_round_rate(struct clk_hw *hw, unsigned long rate,
tmp = parent_rate;
tmp *= 18;
do_div(tmp, frac);
+ *rate = tmp;
- return tmp;
+ return 0;
}
static int clk_ref_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/qcom/clk-regmap-divider.c b/drivers/clk/qcom/clk-regmap-divider.c
index 5348491..1720da4 100644
--- a/drivers/clk/qcom/clk-regmap-divider.c
+++ b/drivers/clk/qcom/clk-regmap-divider.c
@@ -23,8 +23,8 @@ static inline struct clk_regmap_div *to_clk_regmap_div(struct clk_hw *hw)
return container_of(to_clk_regmap(hw), struct clk_regmap_div, clkr);
}
-static long div_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int div_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_regmap_div *divider = to_clk_regmap_div(hw);
diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
index f8d3baf..bd408ef 100644
--- a/drivers/clk/rockchip/clk-pll.c
+++ b/drivers/clk/rockchip/clk-pll.c
@@ -63,8 +63,8 @@ static const struct rockchip_pll_rate_table *rockchip_get_pll_settings(
return NULL;
}
-static long rockchip_pll_round_rate(struct clk_hw *hw,
- unsigned long drate, unsigned long *prate)
+static int rockchip_pll_round_rate(struct clk_hw *hw,
+ unsigned long *drate, unsigned long *prate)
{
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
const struct rockchip_pll_rate_table *rate_table = pll->rate_table;
@@ -72,12 +72,15 @@ static long rockchip_pll_round_rate(struct clk_hw *hw,
/* Assumming rate_table is in descending order */
for (i = 0; i < pll->rate_count; i++) {
- if (drate >= rate_table[i].rate)
- return rate_table[i].rate;
+ if (*drate >= rate_table[i].rate) {
+ *drate = rate_table[i].rate;
+ return 0;
+ }
}
/* return minimum supported value */
- return rate_table[i - 1].rate;
+ *drate = rate_table[i - 1].rate;
+ return 0;
}
/*
diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c
index 9d70e5c..0128de2 100644
--- a/drivers/clk/samsung/clk-pll.c
+++ b/drivers/clk/samsung/clk-pll.c
@@ -42,8 +42,8 @@ static const struct samsung_pll_rate_table *samsung_get_pll_settings(
return NULL;
}
-static long samsung_pll_round_rate(struct clk_hw *hw,
- unsigned long drate, unsigned long *prate)
+static int samsung_pll_round_rate(struct clk_hw *hw,
+ unsigned long *drate, unsigned long *prate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
const struct samsung_pll_rate_table *rate_table = pll->rate_table;
@@ -51,12 +51,15 @@ static long samsung_pll_round_rate(struct clk_hw *hw,
/* Assumming rate_table is in descending order */
for (i = 0; i < pll->rate_count; i++) {
- if (drate >= rate_table[i].rate)
- return rate_table[i].rate;
+ if (*drate >= rate_table[i].rate) {
+ *drate = rate_table[i].rate;
+ return 0;
+ }
}
/* return minimum supported value */
- return rate_table[i - 1].rate;
+ *drate = rate_table[i - 1].rate;
+ return 0;
}
/*
diff --git a/drivers/clk/shmobile/clk-div6.c b/drivers/clk/shmobile/clk-div6.c
index 036a692..d31ae3d 100644
--- a/drivers/clk/shmobile/clk-div6.c
+++ b/drivers/clk/shmobile/clk-div6.c
@@ -97,12 +97,13 @@ static unsigned int cpg_div6_clock_calc_div(unsigned long rate,
return clamp_t(unsigned int, div, 1, 64);
}
-static long cpg_div6_clock_round_rate(struct clk_hw *hw, unsigned long rate,
+static int cpg_div6_clock_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- unsigned int div = cpg_div6_clock_calc_div(rate, *parent_rate);
+ unsigned int div = cpg_div6_clock_calc_div(*rate, *parent_rate);
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int cpg_div6_clock_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/shmobile/clk-rcar-gen2.c b/drivers/clk/shmobile/clk-rcar-gen2.c
index acfb6d7..57581a9 100644
--- a/drivers/clk/shmobile/clk-rcar-gen2.c
+++ b/drivers/clk/shmobile/clk-rcar-gen2.c
@@ -68,8 +68,8 @@ static unsigned long cpg_z_clk_recalc_rate(struct clk_hw *hw,
return div_u64((u64)parent_rate * mult, 32);
}
-static long cpg_z_clk_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cpg_z_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long prate = *parent_rate;
unsigned int mult;
@@ -77,10 +77,11 @@ static long cpg_z_clk_round_rate(struct clk_hw *hw, unsigned long rate,
if (!prate)
prate = 1;
- mult = div_u64((u64)rate * 32, prate);
+ mult = div_u64((u64)*rate * 32, prate);
mult = clamp(mult, 1U, 32U);
- return *parent_rate / 32 * mult;
+ *rate = *parent_rate / 32 * mult;
+ return 0;
}
static int cpg_z_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/sirf/clk-common.c b/drivers/clk/sirf/clk-common.c
index 37af51c..68a7889 100644
--- a/drivers/clk/sirf/clk-common.c
+++ b/drivers/clk/sirf/clk-common.c
@@ -91,7 +91,7 @@ static unsigned long pll_clk_recalc_rate(struct clk_hw *hw,
}
}
-static long pll_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int pll_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
unsigned long fin, nf, nr, od;
@@ -101,9 +101,9 @@ static long pll_clk_round_rate(struct clk_hw *hw, unsigned long rate,
* fout = fin * nf / (nr * od);
* set od = 1, nr = fin/MHz, so fout = nf * MHz
*/
- rate = rate - rate % MHZ;
+ *rate = *rate - *rate % MHZ;
- nf = rate / MHZ;
+ nf = *rate / MHZ;
if (nf > BIT(13))
nf = BIT(13);
if (nf < 1)
@@ -119,7 +119,8 @@ static long pll_clk_round_rate(struct clk_hw *hw, unsigned long rate,
dividend = (u64)fin * nf;
do_div(dividend, nr * od);
- return (long)dividend;
+ *rate = dividend;
+ return 0;
}
static int pll_clk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -158,7 +159,7 @@ static int pll_clk_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
-static long cpu_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int cpu_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
/*
@@ -347,7 +348,7 @@ static unsigned long dmn_clk_recalc_rate(struct clk_hw *hw,
}
}
-static long dmn_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int dmn_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
unsigned long fin;
@@ -355,7 +356,7 @@ static long dmn_clk_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned bits = (strcmp(hw->init->name, "mem") == 0) ? 3 : 4;
fin = *parent_rate;
- ratio = fin / rate;
+ ratio = fin / *rate;
if (ratio < 2)
ratio = 2;
@@ -365,7 +366,8 @@ static long dmn_clk_round_rate(struct clk_hw *hw, unsigned long rate,
wait = (ratio >> 1) - 1;
hold = ratio - wait - 2;
- return fin / (wait + hold + 2);
+ *rate = fin / (wait + hold + 2);
+ return 0;
}
static int dmn_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/spear/clk-aux-synth.c b/drivers/clk/spear/clk-aux-synth.c
index bdfb442..1a93f6a 100644
--- a/drivers/clk/spear/clk-aux-synth.c
+++ b/drivers/clk/spear/clk-aux-synth.c
@@ -52,14 +52,20 @@ static unsigned long aux_calc_rate(struct clk_hw *hw, unsigned long prate,
(rtbl[index].yscale * eq)) * 10000;
}
-static long clk_aux_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_aux_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_aux *aux = to_clk_aux(hw);
int unused;
+ long ret;
- return clk_round_rate_index(hw, drate, *prate, aux_calc_rate,
+ ret = clk_round_rate_index(hw, *drate, *prate, aux_calc_rate,
aux->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_aux_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/spear/clk-frac-synth.c b/drivers/clk/spear/clk-frac-synth.c
index dffd4ce..d4098c8 100644
--- a/drivers/clk/spear/clk-frac-synth.c
+++ b/drivers/clk/spear/clk-frac-synth.c
@@ -55,14 +55,20 @@ static unsigned long frac_calc_rate(struct clk_hw *hw, unsigned long prate,
return prate;
}
-static long clk_frac_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_frac_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_frac *frac = to_clk_frac(hw);
int unused;
+ long ret;
- return clk_round_rate_index(hw, drate, *prate, frac_calc_rate,
+ ret = clk_round_rate_index(hw, *drate, *prate, frac_calc_rate,
frac->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_frac_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/spear/clk-gpt-synth.c b/drivers/clk/spear/clk-gpt-synth.c
index 1afc18c..ea3328b 100644
--- a/drivers/clk/spear/clk-gpt-synth.c
+++ b/drivers/clk/spear/clk-gpt-synth.c
@@ -42,14 +42,20 @@ static unsigned long gpt_calc_rate(struct clk_hw *hw, unsigned long prate,
return prate;
}
-static long clk_gpt_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_gpt_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_gpt *gpt = to_clk_gpt(hw);
int unused;
+ long ret;
- return clk_round_rate_index(hw, drate, *prate, gpt_calc_rate,
+ ret = clk_round_rate_index(hw, *drate, *prate, gpt_calc_rate,
gpt->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_gpt_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/spear/clk-vco-pll.c b/drivers/clk/spear/clk-vco-pll.c
index 1b9b65b..08b1411 100644
--- a/drivers/clk/spear/clk-vco-pll.c
+++ b/drivers/clk/spear/clk-vco-pll.c
@@ -113,12 +113,18 @@ static long clk_pll_round_rate_index(struct clk_hw *hw, unsigned long drate,
return rate;
}
-static long clk_pll_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_pll_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
int unused;
+ long ret;
- return clk_pll_round_rate_index(hw, drate, prate, &unused);
+ ret = clk_pll_round_rate_index(hw, *drate, prate, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_pll_recalc_rate(struct clk_hw *hw, unsigned long
@@ -179,14 +185,20 @@ static inline unsigned long vco_calc_rate(struct clk_hw *hw,
return pll_calc_rate(vco->rtbl, prate, index, NULL);
}
-static long clk_vco_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_vco_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_vco *vco = to_clk_vco(hw);
int unused;
+ long ret;
- return clk_round_rate_index(hw, drate, *prate, vco_calc_rate,
+ ret = clk_round_rate_index(hw, *drate, *prate, vco_calc_rate,
vco->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_vco_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/st/clk-flexgen.c b/drivers/clk/st/clk-flexgen.c
index bf12a25..d04278b 100644
--- a/drivers/clk/st/clk-flexgen.c
+++ b/drivers/clk/st/clk-flexgen.c
@@ -100,20 +100,21 @@ clk_best_div(unsigned long parent_rate, unsigned long rate)
return parent_rate / rate + ((rate > (2*(parent_rate % rate))) ? 0 : 1);
}
-static long flexgen_round_rate(struct clk_hw *hw, unsigned long rate,
+static int flexgen_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
unsigned long div;
/* Round div according to exact prate and wished rate */
- div = clk_best_div(*prate, rate);
+ div = clk_best_div(*prate, *rate);
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
- *prate = rate * div;
- return rate;
+ *prate = *rate * div;
+ return 0;
}
- return *prate / div;
+ *rate = *prate / div;
+ return 0;
}
unsigned long flexgen_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/st/clkgen-fsyn.c b/drivers/clk/st/clkgen-fsyn.c
index af94ed8..7c70049 100644
--- a/drivers/clk/st/clkgen-fsyn.c
+++ b/drivers/clk/st/clkgen-fsyn.c
@@ -548,21 +548,22 @@ int clk_fs660c32_vco_get_params(unsigned long input,
return 0;
}
-static long quadfs_pll_fs660c32_round_rate(struct clk_hw *hw, unsigned long rate
- , unsigned long *prate)
+static int quadfs_pll_fs660c32_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *prate)
{
struct stm_fs params;
- if (!clk_fs660c32_vco_get_params(*prate, rate, ¶ms))
- clk_fs660c32_vco_get_rate(*prate, ¶ms, &rate);
+ if (!clk_fs660c32_vco_get_params(*prate, *rate, ¶ms))
+ clk_fs660c32_vco_get_rate(*prate, ¶ms, rate);
pr_debug("%s: %s new rate %ld [sdiv=0x%x,md=0x%x,pe=0x%x,nsdiv3=%u]\n",
__func__, __clk_get_name(hw->clk),
- rate, (unsigned int)params.sdiv,
+ *rate, (unsigned int)params.sdiv,
(unsigned int)params.mdiv,
(unsigned int)params.pe, (unsigned int)params.nsdiv);
- return rate;
+ return 0;
}
static int quadfs_pll_fs660c32_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -953,19 +954,19 @@ static unsigned long quadfs_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long quadfs_round_rate(struct clk_hw *hw, unsigned long rate,
+static int quadfs_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct stm_fs params;
- rate = quadfs_find_best_rate(hw, rate, *prate, ¶ms);
+ *rate = quadfs_find_best_rate(hw, *rate, *prate, ¶ms);
pr_debug("%s: %s new rate %ld [sdiv=0x%x,md=0x%x,pe=0x%x,nsdiv3=%u]\n",
__func__, __clk_get_name(hw->clk),
- rate, (unsigned int)params.sdiv, (unsigned int)params.mdiv,
+ *rate, (unsigned int)params.sdiv, (unsigned int)params.mdiv,
(unsigned int)params.pe, (unsigned int)params.nsdiv);
- return rate;
+ return 0;
}
diff --git a/drivers/clk/st/clkgen-mux.c b/drivers/clk/st/clkgen-mux.c
index 9a15ec3..2bbcb7b 100644
--- a/drivers/clk/st/clkgen-mux.c
+++ b/drivers/clk/st/clkgen-mux.c
@@ -190,7 +190,7 @@ static int clkgena_divmux_set_rate(struct clk_hw *hw, unsigned long rate,
return clk_divider_ops.set_rate(div_hw, rate, parent_rate);
}
-static long clkgena_divmux_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clkgena_divmux_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clkgena_divmux *genamux = to_clkgena_divmux(hw);
diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factors.c
index 8c20190..5865300 100644
--- a/drivers/clk/sunxi/clk-factors.c
+++ b/drivers/clk/sunxi/clk-factors.c
@@ -69,14 +69,17 @@ static unsigned long clk_factors_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long clk_factors_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_factors_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct clk_factors *factors = to_clk_factors(hw);
- factors->get_factors((u32 *)&rate, (u32)*parent_rate,
+ u32 tmp_rate = *rate;
+
+ factors->get_factors(&tmp_rate, (u32)*parent_rate,
NULL, NULL, NULL, NULL);
- return rate;
+ *rate = tmp_rate;
+ return 0;
}
static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
@@ -100,7 +103,8 @@ static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
else
parent_rate = __clk_get_rate(parent);
- child_rate = clk_factors_round_rate(hw, rate, &parent_rate);
+ child_rate = rate;
+ clk_factors_round_rate(hw, &child_rate, &parent_rate);
if (child_rate <= rate && child_rate > best_child_rate) {
best_parent = parent;
diff --git a/drivers/clk/tegra/clk-audio-sync.c b/drivers/clk/tegra/clk-audio-sync.c
index c0f7843..0224256 100644
--- a/drivers/clk/tegra/clk-audio-sync.c
+++ b/drivers/clk/tegra/clk-audio-sync.c
@@ -28,15 +28,15 @@ static unsigned long clk_sync_source_recalc_rate(struct clk_hw *hw,
return sync->rate;
}
-static long clk_sync_source_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_sync_source_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct tegra_clk_sync_source *sync = to_clk_sync_source(hw);
- if (rate > sync->max_rate)
+ if (*rate > sync->max_rate)
return -EINVAL;
else
- return rate;
+ return 0;
}
static int clk_sync_source_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/tegra/clk-divider.c b/drivers/clk/tegra/clk-divider.c
index 59a5714..9e5ca82 100644
--- a/drivers/clk/tegra/clk-divider.c
+++ b/drivers/clk/tegra/clk-divider.c
@@ -85,23 +85,28 @@ static unsigned long clk_frac_div_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long clk_frac_div_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_frac_div_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_frac_div *divider = to_clk_frac_div(hw);
int div, mul;
unsigned long output_rate = *prate;
- if (!rate)
- return output_rate;
+ if (!*rate) {
+ *rate = output_rate;
+ return 0;
+ }
- div = get_div(divider, rate, output_rate);
- if (div < 0)
- return *prate;
+ div = get_div(divider, *rate, output_rate);
+ if (div < 0) {
+ *rate = *prate;
+ return 0;
+ }
mul = get_mul(divider);
- return DIV_ROUND_UP(output_rate * mul, div + mul);
+ *rate = DIV_ROUND_UP(output_rate * mul, div + mul);
+ return 0;
}
static int clk_frac_div_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/tegra/clk-periph.c b/drivers/clk/tegra/clk-periph.c
index d84ae49..5a262f5 100644
--- a/drivers/clk/tegra/clk-periph.c
+++ b/drivers/clk/tegra/clk-periph.c
@@ -56,8 +56,8 @@ static unsigned long clk_periph_recalc_rate(struct clk_hw *hw,
return div_ops->recalc_rate(div_hw, parent_rate);
}
-static long clk_periph_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_periph_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct tegra_clk_periph *periph = to_clk_periph(hw);
const struct clk_ops *div_ops = periph->div_ops;
diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c
index bfef9ab..a73bdb3 100644
--- a/drivers/clk/tegra/clk-pll.c
+++ b/drivers/clk/tegra/clk-pll.c
@@ -623,24 +623,29 @@ static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
return ret;
}
-static long clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
struct tegra_clk_pll_freq_table cfg;
- if (pll->params->flags & TEGRA_PLL_FIXED)
- return pll->params->fixed_rate;
+ if (pll->params->flags & TEGRA_PLL_FIXED) {
+ *rate = pll->params->fixed_rate;
+ return 0;
+ }
/* PLLM is used for memory; we do not change rate */
- if (pll->params->flags & TEGRA_PLLM)
- return __clk_get_rate(hw->clk);
+ if (pll->params->flags & TEGRA_PLLM) {
+ *rate = __clk_get_rate(hw->clk);
+ return 0;
+ }
- if (_get_table_rate(hw, &cfg, rate, *prate) &&
- _calc_rate(hw, &cfg, rate, *prate))
+ if (_get_table_rate(hw, &cfg, *rate, *prate) &&
+ _calc_rate(hw, &cfg, *rate, *prate))
return -EINVAL;
- return cfg.output_rate;
+ *rate = cfg.output_rate;
+ return 0;
}
static unsigned long clk_pll_recalc_rate(struct clk_hw *hw,
@@ -1001,25 +1006,28 @@ static int clk_pllxc_set_rate(struct clk_hw *hw, unsigned long rate,
return ret;
}
-static long clk_pll_ramp_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pll_ramp_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_pll_freq_table cfg;
int ret = 0, p_div;
u64 output_rate = *prate;
- ret = _pll_ramp_calc_pll(hw, &cfg, rate, *prate);
+ ret = _pll_ramp_calc_pll(hw, &cfg, *rate, *prate);
if (ret < 0)
return ret;
p_div = _hw_to_p_div(hw, cfg.p);
- if (p_div < 0)
- return p_div;
+ if (p_div < 0) {
+ *rate = p_div;
+ return 0;
+ }
output_rate *= cfg.n;
do_div(output_rate, cfg.m * p_div);
- return output_rate;
+ *rate = output_rate;
+ return 0;
}
static int clk_pllm_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -1272,12 +1280,13 @@ static unsigned long clk_pllre_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long clk_pllre_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pllre_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
- return _pllre_calc_rate(pll, NULL, rate, *prate);
+ *rate = _pllre_calc_rate(pll, NULL, *rate, *prate);
+ return 0;
}
static int clk_plle_tegra114_enable(struct clk_hw *hw)
diff --git a/drivers/clk/ti/clk-dra7-atl.c b/drivers/clk/ti/clk-dra7-atl.c
index 59bb4b3..cdf1d17 100644
--- a/drivers/clk/ti/clk-dra7-atl.c
+++ b/drivers/clk/ti/clk-dra7-atl.c
@@ -124,16 +124,17 @@ static unsigned long atl_clk_recalc_rate(struct clk_hw *hw,
return parent_rate / cdesc->divider;
}
-static long atl_clk_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int atl_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned divider;
- divider = (*parent_rate + rate / 2) / rate;
+ divider = (*parent_rate + *rate / 2) / *rate;
if (divider > DRA7_ATL_DIVIDER_MASK + 1)
divider = DRA7_ATL_DIVIDER_MASK + 1;
- return *parent_rate / divider;
+ *rate = *parent_rate / divider;
+ return 0;
}
static int atl_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/ti/composite.c b/drivers/clk/ti/composite.c
index 3654f61..eddad41 100644
--- a/drivers/clk/ti/composite.c
+++ b/drivers/clk/ti/composite.c
@@ -36,8 +36,8 @@ static unsigned long ti_composite_recalc_rate(struct clk_hw *hw,
return ti_clk_divider_ops.recalc_rate(hw, parent_rate);
}
-static long ti_composite_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int ti_composite_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
return -EINVAL;
}
diff --git a/drivers/clk/ti/divider.c b/drivers/clk/ti/divider.c
index ff5f117..6044251 100644
--- a/drivers/clk/ti/divider.c
+++ b/drivers/clk/ti/divider.c
@@ -200,13 +200,14 @@ static int ti_clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
return bestdiv;
}
-static long ti_clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int ti_clk_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
int div;
- div = ti_clk_divider_bestdiv(hw, rate, prate);
+ div = ti_clk_divider_bestdiv(hw, *rate, prate);
- return DIV_ROUND_UP(*prate, div);
+ *rate = DIV_ROUND_UP(*prate, div);
+ return 0;
}
static int ti_clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/ux500/clk-prcmu.c b/drivers/clk/ux500/clk-prcmu.c
index bf63c96..1e1aa2d 100644
--- a/drivers/clk/ux500/clk-prcmu.c
+++ b/drivers/clk/ux500/clk-prcmu.c
@@ -80,11 +80,18 @@ static unsigned long clk_prcmu_recalc_rate(struct clk_hw *hw,
return prcmu_clock_rate(clk->cg_sel);
}
-static long clk_prcmu_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_prcmu_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
- return prcmu_round_clock_rate(clk->cg_sel, rate);
+ long ret;
+
+ ret = prcmu_round_clock_rate(clk->cg_sel, *rate);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
}
static int clk_prcmu_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/versatile/clk-icst.c b/drivers/clk/versatile/clk-icst.c
index bc96f10..6404e61 100644
--- a/drivers/clk/versatile/clk-icst.c
+++ b/drivers/clk/versatile/clk-icst.c
@@ -91,14 +91,15 @@ static unsigned long icst_recalc_rate(struct clk_hw *hw,
return icst->rate;
}
-static long icst_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int icst_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_icst *icst = to_icst(hw);
struct icst_vco vco;
- vco = icst_hz_to_vco(icst->params, rate);
- return icst_hz(icst->params, vco);
+ vco = icst_hz_to_vco(icst->params, *rate);
+ *rate = icst_hz(icst->params, vco);
+ return 0;
}
static int icst_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/versatile/clk-vexpress-osc.c b/drivers/clk/versatile/clk-vexpress-osc.c
index 765f1e0..b507758 100644
--- a/drivers/clk/versatile/clk-vexpress-osc.c
+++ b/drivers/clk/versatile/clk-vexpress-osc.c
@@ -39,18 +39,18 @@ static unsigned long vexpress_osc_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long vexpress_osc_round_rate(struct clk_hw *hw, unsigned long rate,
+static int vexpress_osc_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
struct vexpress_osc *osc = to_vexpress_osc(hw);
- if (WARN_ON(osc->rate_min && rate < osc->rate_min))
- rate = osc->rate_min;
+ if (WARN_ON(osc->rate_min && *rate < osc->rate_min))
+ *rate = osc->rate_min;
- if (WARN_ON(osc->rate_max && rate > osc->rate_max))
- rate = osc->rate_max;
+ if (WARN_ON(osc->rate_max && *rate > osc->rate_max))
+ *rate = osc->rate_max;
- return rate;
+ return 0;
}
static int vexpress_osc_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/zynq/pll.c b/drivers/clk/zynq/pll.c
index 00d72fb..b62d298 100644
--- a/drivers/clk/zynq/pll.c
+++ b/drivers/clk/zynq/pll.c
@@ -60,18 +60,19 @@ struct zynq_pll {
* @prate: Clock frequency of parent clock
* Returns frequency closest to @rate the hardware can generate.
*/
-static long zynq_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int zynq_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
u32 fbdiv;
- fbdiv = DIV_ROUND_CLOSEST(rate, *prate);
+ fbdiv = DIV_ROUND_CLOSEST(*rate, *prate);
if (fbdiv < PLL_FBDIV_MIN)
fbdiv = PLL_FBDIV_MIN;
else if (fbdiv > PLL_FBDIV_MAX)
fbdiv = PLL_FBDIV_MAX;
- return *prate * fbdiv;
+ *rate = *prate * fbdiv;
+ return 0;
}
/**
diff --git a/drivers/gpu/drm/imx/imx-tve.c b/drivers/gpu/drm/imx/imx-tve.c
index 4216e47..0695428 100644
--- a/drivers/gpu/drm/imx/imx-tve.c
+++ b/drivers/gpu/drm/imx/imx-tve.c
@@ -423,17 +423,20 @@ static unsigned long clk_tve_di_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_tve_di_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long div;
- div = *prate / rate;
+ div = *prate / *rate;
if (div >= 4)
- return *prate / 4;
+ *rate = *prate / 4;
else if (div >= 2)
- return *prate / 2;
- return *prate;
+ *rate = *prate / 2;
+ else
+ *rate = *prate;
+
+ return 0;
}
static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c
index eeed006..97cdcb4 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c
@@ -336,11 +336,12 @@ static unsigned long hdmi_pll_recalc_rate(struct clk_hw *hw,
return phy_8960->pixclk;
}
-static long hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int hdmi_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- const struct pll_rate *pll_rate = find_rate(rate);
- return pll_rate->rate;
+ const struct pll_rate *pll_rate = find_rate(*rate);
+ *rate = pll_rate->rate;
+ return 0;
}
static int hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c
index ce42459..c89b109 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c
@@ -109,11 +109,12 @@ static unsigned long mpd4_lvds_pll_recalc_rate(struct clk_hw *hw,
return lvds_pll->pixclk;
}
-static long mpd4_lvds_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int mpd4_lvds_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- const struct pll_rate *pll_rate = find_rate(rate);
- return pll_rate->rate;
+ const struct pll_rate *pll_rate = find_rate(*rate);
+ *rate = pll_rate->rate;
+ return 0;
}
static int mpd4_lvds_pll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c
index deca809..4d5ba85 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -231,11 +231,11 @@ static u32 isp_xclk_calc_divider(unsigned long *rate, unsigned long parent_rate)
return divider;
}
-static long isp_xclk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int isp_xclk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- isp_xclk_calc_divider(&rate, *parent_rate);
- return rate;
+ isp_xclk_calc_divider(rate, *parent_rate);
+ return 0;
}
static int isp_xclk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
index b936bb4..5e6f5a5 100644
--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -316,15 +316,19 @@ static unsigned long hym8563_clkout_recalc_rate(struct clk_hw *hw,
return clkout_rates[ret];
}
-static long hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
int i;
- for (i = 0; i < ARRAY_SIZE(clkout_rates); i++)
- if (clkout_rates[i] <= rate)
- return clkout_rates[i];
+ for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) {
+ if (clkout_rates[i] <= *rate) {
+ *rate = clkout_rates[i];
+ return 0;
+ }
+ }
+ *rate = 0;
return 0;
}
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 5591ea7..1213b0b 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -173,8 +173,8 @@ struct clk_ops {
void (*disable_unused)(struct clk_hw *hw);
unsigned long (*recalc_rate)(struct clk_hw *hw,
unsigned long parent_rate);
- long (*round_rate)(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate);
+ int (*round_rate)(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate);
long (*determine_rate)(struct clk_hw *hw,
unsigned long rate,
unsigned long min_rate,
@@ -365,7 +365,7 @@ extern const struct clk_ops clk_divider_ops;
unsigned long divider_recalc_rate(struct clk_hw *hw, unsigned long parent_rate,
unsigned int val, const struct clk_div_table *table,
unsigned long flags);
-long divider_round_rate(struct clk_hw *hw, unsigned long rate,
+int divider_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate, const struct clk_div_table *table,
u8 width, unsigned long flags);
int divider_get_val(unsigned long rate, unsigned long parent_rate,
diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h
index 6784400..3b2406c 100644
--- a/include/linux/clk/ti.h
+++ b/include/linux/clk/ti.h
@@ -277,9 +277,9 @@ long omap3_noncore_dpll_determine_rate(struct clk_hw *hw,
struct clk_hw **best_parent_clk);
unsigned long omap4_dpll_regm4xen_recalc(struct clk_hw *hw,
unsigned long parent_rate);
-long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
- unsigned long target_rate,
- unsigned long *parent_rate);
+int omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
+ unsigned long *target_rate,
+ unsigned long *parent_rate);
long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw,
unsigned long rate,
unsigned long min_rate,
@@ -288,14 +288,14 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw,
struct clk_hw **best_parent_clk);
u8 omap2_init_dpll_parent(struct clk_hw *hw);
unsigned long omap3_dpll_recalc(struct clk_hw *hw, unsigned long parent_rate);
-long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
- unsigned long *parent_rate);
+int omap2_dpll_round_rate(struct clk_hw *hw, unsigned long *target_rate,
+ unsigned long *parent_rate);
void omap2_init_clk_clkdm(struct clk_hw *clk);
unsigned long omap3_clkoutx2_recalc(struct clk_hw *hw,
unsigned long parent_rate);
int omap3_clkoutx2_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate);
-long omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long rate,
+int omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate);
int omap2_clkops_enable_clkdm(struct clk_hw *hw);
void omap2_clkops_disable_clkdm(struct clk_hw *hw);
--
1.9.1
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
@ 2015-04-17 7:29 ` Boris Brezillon
0 siblings, 0 replies; 18+ messages in thread
From: Boris Brezillon @ 2015-04-17 7:29 UTC (permalink / raw)
To: Mike Turquette
Cc: Mikko Perttunen, Boris Brezillon, Jonathan Corbet, Shawn Guo,
ascha Hauer, David Brown, Daniel Walker, Bryan Huntsman,
Tony Lindgren, Paul Walmsley, Liviu Dudau, Sudeep Holla,
Lorenzo Pieralisi, Ralf Baechle, Max Filippov, Heiko Stuebner,
Sylwester Nawrocki, Tomasz Figa, Barry Song, Viresh Kumar,
Emilio López, Maxime Ripard, Peter De Schrijver,
Prashant Gaikwad, Stephen Warren, Thierry Reding,
Alexandre Courbot, Tero Kristo, Ulf Hansson, Michal Simek,
Philipp Zabel, linux-doc, linux-kernel, linux-arm-kernel,
linux-arm-msm, linux-omap, linux-mips, patches, linux-rockchip,
linux-samsung-soc, spear-devel, linux-tegra, dri-devel,
linux-media, rtc-linux
Clock rates are stored in an unsigned long field, but ->round_rate()
(which returns a rounded rate from a requested one) returns a long
value (errors are reported using negative error codes), which can lead
to long overflow if the clock rate exceed 2Ghz.
Change ->round_rate() prototype to return 0 or an error code, and pass the
requested rate as a pointer so that it can be adjusted depending on
hardware capabilities.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
CC: Jonathan Corbet <corbet@lwn.net>
CC: Shawn Guo <shawn.guo@linaro.org>
CC: ascha Hauer <kernel@pengutronix.de>
CC: David Brown <davidb@codeaurora.org>
CC: Daniel Walker <dwalker@fifo99.com>
CC: Bryan Huntsman <bryanh@codeaurora.org>
CC: Tony Lindgren <tony@atomide.com>
CC: Paul Walmsley <paul@pwsan.com>
CC: Liviu Dudau <liviu.dudau@arm.com>
CC: Sudeep Holla <sudeep.holla@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: Max Filippov <jcmvbkbc@gmail.com>
CC: Heiko Stuebner <heiko@sntech.de>
CC: Sylwester Nawrocki <s.nawrocki@samsung.com>
CC: Tomasz Figa <tomasz.figa@gmail.com>
CC: Barry Song <baohua@kernel.org>
CC: Viresh Kumar <viresh.linux@gmail.com>
CC: "Emilio López" <emilio@elopez.com.ar>
CC: Maxime Ripard <maxime.ripard@free-electrons.com>
CC: Peter De Schrijver <pdeschrijver@nvidia.com>
CC: Prashant Gaikwad <pgaikwad@nvidia.com>
CC: Stephen Warren <swarren@wwwdotorg.org>
CC: Thierry Reding <thierry.reding@gmail.com>
CC: Alexandre Courbot <gnurou@gmail.com>
CC: Tero Kristo <t-kristo@ti.com>
CC: Ulf Hansson <ulf.hansson@linaro.org>
CC: Michal Simek <michal.simek@xilinx.com>
CC: Philipp Zabel <p.zabel@pengutronix.de>
CC: linux-doc@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-arm-msm@vger.kernel.org
CC: linux-omap@vger.kernel.org
CC: linux-mips@linux-mips.org
CC: patches@opensource.wolfsonmicro.com
CC: linux-rockchip@lists.infradead.org
CC: linux-samsung-soc@vger.kernel.org
CC: spear-devel@list.st.com
CC: linux-tegra@vger.kernel.org
CC: dri-devel@lists.freedesktop.org
CC: linux-media@vger.kernel.org
CC: rtc-linux@googlegroups.com
Documentation/clk.txt | 4 +-
arch/arm/mach-imx/clk-busy.c | 2 +-
arch/arm/mach-imx/clk-cpu.c | 12 +++-
arch/arm/mach-imx/clk-fixup-div.c | 2 +-
arch/arm/mach-imx/clk-pfd.c | 11 ++--
arch/arm/mach-imx/clk-pllv2.c | 8 ++-
arch/arm/mach-imx/clk-pllv3.c | 46 +++++++------
arch/arm/mach-msm/clock-pcom.c | 4 +-
arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c | 13 ++--
arch/arm/mach-omap2/clkt_clksel.c | 6 +-
arch/arm/mach-omap2/clkt_dpll.c | 21 +++---
arch/arm/mach-omap2/clock.h | 4 +-
arch/arm/mach-omap2/dpll3xxx.c | 27 +++++---
arch/arm/mach-omap2/dpll44xx.c | 26 +++++---
arch/arm/mach-vexpress/spc.c | 11 +++-
arch/mips/alchemy/common/clock.c | 13 ++--
drivers/clk/at91/clk-h32mx.c | 24 ++++---
drivers/clk/at91/clk-peripheral.c | 31 +++++----
drivers/clk/at91/clk-pll.c | 14 ++--
drivers/clk/at91/clk-plldiv.c | 22 ++++---
drivers/clk/at91/clk-smd.c | 24 ++++---
drivers/clk/at91/clk-usb.c | 34 ++++++----
drivers/clk/clk-axi-clkgen.c | 5 +-
drivers/clk/clk-cdce706.c | 46 ++++++-------
drivers/clk/clk-composite.c | 23 ++++---
drivers/clk/clk-divider.c | 16 +++--
drivers/clk/clk-fixed-factor.c | 7 +-
drivers/clk/clk-fractional-divider.c | 16 +++--
drivers/clk/clk-highbank.c | 18 +++---
drivers/clk/clk-si5351.c | 96 ++++++++++++++--------------
drivers/clk/clk-si570.c | 14 ++--
drivers/clk/clk-u300.c | 65 ++++++++++---------
drivers/clk/clk-vt8500.c | 27 ++++----
drivers/clk/clk-wm831x.c | 11 ++--
drivers/clk/clk-xgene.c | 11 ++--
drivers/clk/clk.c | 15 +++--
drivers/clk/mmp/clk-frac.c | 14 ++--
drivers/clk/mvebu/clk-corediv.c | 7 +-
drivers/clk/mvebu/clk-cpu.c | 9 +--
drivers/clk/mxs/clk-div.c | 4 +-
drivers/clk/mxs/clk-frac.c | 11 ++--
drivers/clk/mxs/clk-ref.c | 11 ++--
drivers/clk/qcom/clk-regmap-divider.c | 4 +-
drivers/clk/rockchip/clk-pll.c | 13 ++--
drivers/clk/samsung/clk-pll.c | 13 ++--
drivers/clk/shmobile/clk-div6.c | 7 +-
drivers/clk/shmobile/clk-rcar-gen2.c | 9 +--
drivers/clk/sirf/clk-common.c | 18 +++---
drivers/clk/spear/clk-aux-synth.c | 10 ++-
drivers/clk/spear/clk-frac-synth.c | 10 ++-
drivers/clk/spear/clk-gpt-synth.c | 10 ++-
drivers/clk/spear/clk-vco-pll.c | 20 ++++--
drivers/clk/st/clk-flexgen.c | 11 ++--
drivers/clk/st/clkgen-fsyn.c | 21 +++---
drivers/clk/st/clkgen-mux.c | 2 +-
drivers/clk/sunxi/clk-factors.c | 14 ++--
drivers/clk/tegra/clk-audio-sync.c | 8 +--
drivers/clk/tegra/clk-divider.c | 19 ++++--
drivers/clk/tegra/clk-periph.c | 4 +-
drivers/clk/tegra/clk-pll.c | 39 ++++++-----
drivers/clk/ti/clk-dra7-atl.c | 9 +--
drivers/clk/ti/composite.c | 4 +-
drivers/clk/ti/divider.c | 9 +--
drivers/clk/ux500/clk-prcmu.c | 13 +++-
drivers/clk/versatile/clk-icst.c | 9 +--
drivers/clk/versatile/clk-vexpress-osc.c | 12 ++--
drivers/clk/zynq/pll.c | 7 +-
drivers/gpu/drm/imx/imx-tve.c | 15 +++--
drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c | 7 +-
drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c | 7 +-
drivers/media/platform/omap3isp/isp.c | 6 +-
drivers/rtc/rtc-hym8563.c | 14 ++--
include/linux/clk-provider.h | 6 +-
include/linux/clk/ti.h | 12 ++--
74 files changed, 672 insertions(+), 475 deletions(-)
diff --git a/Documentation/clk.txt b/Documentation/clk.txt
index 0e4f90a..fca8b7a 100644
--- a/Documentation/clk.txt
+++ b/Documentation/clk.txt
@@ -68,8 +68,8 @@ the operations defined in clk.h:
int (*is_enabled)(struct clk_hw *hw);
unsigned long (*recalc_rate)(struct clk_hw *hw,
unsigned long parent_rate);
- long (*round_rate)(struct clk_hw *hw,
- unsigned long rate,
+ int (*round_rate)(struct clk_hw *hw,
+ unsigned long *rate,
unsigned long *parent_rate);
long (*determine_rate)(struct clk_hw *hw,
unsigned long rate,
diff --git a/arch/arm/mach-imx/clk-busy.c b/arch/arm/mach-imx/clk-busy.c
index 4bb1bc4..f8c67e9 100644
--- a/arch/arm/mach-imx/clk-busy.c
+++ b/arch/arm/mach-imx/clk-busy.c
@@ -51,7 +51,7 @@ static unsigned long clk_busy_divider_recalc_rate(struct clk_hw *hw,
return busy->div_ops->recalc_rate(&busy->div.hw, parent_rate);
}
-static long clk_busy_divider_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_busy_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_busy_divider *busy = to_clk_busy_divider(hw);
diff --git a/arch/arm/mach-imx/clk-cpu.c b/arch/arm/mach-imx/clk-cpu.c
index aa1c345..f6af2d8 100644
--- a/arch/arm/mach-imx/clk-cpu.c
+++ b/arch/arm/mach-imx/clk-cpu.c
@@ -34,12 +34,18 @@ static unsigned long clk_cpu_recalc_rate(struct clk_hw *hw,
return clk_get_rate(cpu->div);
}
-static long clk_cpu_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_cpu_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_cpu *cpu = to_clk_cpu(hw);
+ long ret;
- return clk_round_rate(cpu->pll, rate);
+ ret = clk_round_rate(cpu->pll, *rate);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
}
static int clk_cpu_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/arm/mach-imx/clk-fixup-div.c b/arch/arm/mach-imx/clk-fixup-div.c
index 21db020..c2f4f00 100644
--- a/arch/arm/mach-imx/clk-fixup-div.c
+++ b/arch/arm/mach-imx/clk-fixup-div.c
@@ -48,7 +48,7 @@ static unsigned long clk_fixup_div_recalc_rate(struct clk_hw *hw,
return fixup_div->ops->recalc_rate(&fixup_div->divider.hw, parent_rate);
}
-static long clk_fixup_div_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_fixup_div_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_fixup_div *fixup_div = to_clk_fixup_div(hw);
diff --git a/arch/arm/mach-imx/clk-pfd.c b/arch/arm/mach-imx/clk-pfd.c
index 0b0f6f6..449fb7a 100644
--- a/arch/arm/mach-imx/clk-pfd.c
+++ b/arch/arm/mach-imx/clk-pfd.c
@@ -68,14 +68,14 @@ static unsigned long clk_pfd_recalc_rate(struct clk_hw *hw,
return tmp;
}
-static long clk_pfd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_pfd_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
u64 tmp = *prate;
u8 frac;
- tmp = tmp * 18 + rate / 2;
- do_div(tmp, rate);
+ tmp = tmp * 18 + *rate / 2;
+ do_div(tmp, *rate);
frac = tmp;
if (frac < 12)
frac = 12;
@@ -85,7 +85,8 @@ static long clk_pfd_round_rate(struct clk_hw *hw, unsigned long rate,
tmp *= 18;
do_div(tmp, frac);
- return tmp;
+ *rate = tmp;
+ return 0;
}
static int clk_pfd_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/arm/mach-imx/clk-pllv2.c b/arch/arm/mach-imx/clk-pllv2.c
index 20889d5..6b48bf5 100644
--- a/arch/arm/mach-imx/clk-pllv2.c
+++ b/arch/arm/mach-imx/clk-pllv2.c
@@ -180,14 +180,16 @@ static int clk_pllv2_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
-static long clk_pllv2_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pllv2_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
u32 dp_op, dp_mfd, dp_mfn;
- __clk_pllv2_set_rate(rate, *prate, &dp_op, &dp_mfd, &dp_mfn);
- return __clk_pllv2_recalc_rate(*prate, MXC_PLL_DP_CTL_DPDCK0_2_EN,
+ __clk_pllv2_set_rate(*rate, *prate, &dp_op, &dp_mfd, &dp_mfn);
+ *rate = __clk_pllv2_recalc_rate(*prate, MXC_PLL_DP_CTL_DPDCK0_2_EN,
dp_op, dp_mfd, dp_mfn);
+
+ return 0;
}
static int clk_pllv2_prepare(struct clk_hw *hw)
diff --git a/arch/arm/mach-imx/clk-pllv3.c b/arch/arm/mach-imx/clk-pllv3.c
index 641ebc5..4d8f4eb 100644
--- a/arch/arm/mach-imx/clk-pllv3.c
+++ b/arch/arm/mach-imx/clk-pllv3.c
@@ -104,13 +104,15 @@ static unsigned long clk_pllv3_recalc_rate(struct clk_hw *hw,
return (div == 1) ? parent_rate * 22 : parent_rate * 20;
}
-static long clk_pllv3_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_pllv3_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long parent_rate = *prate;
- return (rate >= parent_rate * 22) ? parent_rate * 22 :
- parent_rate * 20;
+ *rate = (*rate >= parent_rate * 22) ? parent_rate * 22 :
+ parent_rate * 20;
+
+ return 0;
}
static int clk_pllv3_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -151,21 +153,23 @@ static unsigned long clk_pllv3_sys_recalc_rate(struct clk_hw *hw,
return parent_rate * div / 2;
}
-static long clk_pllv3_sys_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_pllv3_sys_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long parent_rate = *prate;
unsigned long min_rate = parent_rate * 54 / 2;
unsigned long max_rate = parent_rate * 108 / 2;
u32 div;
- if (rate > max_rate)
- rate = max_rate;
- else if (rate < min_rate)
- rate = min_rate;
- div = rate * 2 / parent_rate;
+ if (*rate > max_rate)
+ *rate = max_rate;
+ else if (*rate < min_rate)
+ *rate = min_rate;
+ div = *rate * 2 / parent_rate;
- return parent_rate * div / 2;
+ *rate = parent_rate * div / 2;
+
+ return 0;
}
static int clk_pllv3_sys_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -207,7 +211,7 @@ static unsigned long clk_pllv3_av_recalc_rate(struct clk_hw *hw,
return (parent_rate * div) + ((parent_rate / mfd) * mfn);
}
-static long clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
unsigned long parent_rate = *prate;
@@ -217,18 +221,20 @@ static long clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long rate,
u32 mfn, mfd = 1000000;
s64 temp64;
- if (rate > max_rate)
- rate = max_rate;
- else if (rate < min_rate)
- rate = min_rate;
+ if (*rate > max_rate)
+ *rate = max_rate;
+ else if (*rate < min_rate)
+ *rate = min_rate;
- div = rate / parent_rate;
- temp64 = (u64) (rate - div * parent_rate);
+ div = *rate / parent_rate;
+ temp64 = (u64) (*rate - div * parent_rate);
temp64 *= mfd;
do_div(temp64, parent_rate);
mfn = temp64;
- return parent_rate * div + parent_rate / mfd * mfn;
+ *rate = parent_rate * div + parent_rate / mfd * mfn;
+
+ return 0;
}
static int clk_pllv3_av_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/arm/mach-msm/clock-pcom.c b/arch/arm/mach-msm/clock-pcom.c
index f5b69d7..118c288 100644
--- a/arch/arm/mach-msm/clock-pcom.c
+++ b/arch/arm/mach-msm/clock-pcom.c
@@ -109,11 +109,11 @@ static int pc_clk_is_enabled(struct clk_hw *hw)
return id;
}
-static long pc_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int pc_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *p_rate)
{
/* Not really supported; pc_clk_set_rate() does rounding on it's own. */
- return rate;
+ return 0;
}
static struct clk_ops clk_ops_pcom = {
diff --git a/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c b/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
index 85e0b0c0..2829a6f 100644
--- a/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
+++ b/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
@@ -71,8 +71,8 @@ unsigned long omap2_table_mpu_recalc(struct clk_hw *clk,
* Some might argue L3-DDR, others ARM, others IVA. This code is simple and
* just uses the ARM rates.
*/
-long omap2_round_to_table_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+int omap2_round_to_table_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
const struct prcm_config *ptr;
long highest_rate;
@@ -88,10 +88,15 @@ long omap2_round_to_table_rate(struct clk_hw *hw, unsigned long rate,
highest_rate = ptr->mpu_speed;
/* Can check only after xtal frequency check */
- if (ptr->mpu_speed <= rate)
+ if (ptr->mpu_speed <= *rate)
break;
}
- return highest_rate;
+
+ if (highest_rate < 0)
+ return highest_rate;
+
+ *rate = highest_rate;
+ return 0;
}
/* Sets basic clocks based on the specified rate */
diff --git a/arch/arm/mach-omap2/clkt_clksel.c b/arch/arm/mach-omap2/clkt_clksel.c
index 7ee2610..b932276 100644
--- a/arch/arm/mach-omap2/clkt_clksel.c
+++ b/arch/arm/mach-omap2/clkt_clksel.c
@@ -385,13 +385,15 @@ unsigned long omap2_clksel_recalc(struct clk_hw *hw, unsigned long parent_rate)
*
* Returns the rounded clock rate or returns 0xffffffff on error.
*/
-long omap2_clksel_round_rate(struct clk_hw *hw, unsigned long target_rate,
+int omap2_clksel_round_rate(struct clk_hw *hw, unsigned long *target_rate,
unsigned long *parent_rate)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
u32 new_div;
- return omap2_clksel_round_rate_div(clk, target_rate, &new_div);
+ *target_rate = omap2_clksel_round_rate_div(clk, *target_rate,
+ &new_div);
+ return 0;
}
/**
diff --git a/arch/arm/mach-omap2/clkt_dpll.c b/arch/arm/mach-omap2/clkt_dpll.c
index f251a14..7dac6b3 100644
--- a/arch/arm/mach-omap2/clkt_dpll.c
+++ b/arch/arm/mach-omap2/clkt_dpll.c
@@ -280,7 +280,7 @@ unsigned long omap2_get_dpll_rate(struct clk_hw_omap *clk)
* (expensive) function again. Returns ~0 if the target rate cannot
* be rounded, or the rounded rate upon success.
*/
-long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
+int omap2_dpll_round_rate(struct clk_hw *hw, unsigned long *target_rate,
unsigned long *parent_rate)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
@@ -295,16 +295,16 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
const char *clk_name;
if (!clk || !clk->dpll_data)
- return ~0;
+ return -EINVAL;
dd = clk->dpll_data;
ref_rate = __clk_get_rate(dd->clk_ref);
clk_name = __clk_get_name(hw->clk);
pr_debug("clock: %s: starting DPLL round_rate, target rate %lu\n",
- clk_name, target_rate);
+ clk_name, *target_rate);
- scaled_rt_rp = target_rate / (ref_rate / DPLL_SCALE_FACTOR);
+ scaled_rt_rp = *target_rate / (ref_rate / DPLL_SCALE_FACTOR);
scaled_max_m = dd->max_multiplier * DPLL_SCALE_FACTOR;
dd->last_rounded_rate = 0;
@@ -330,7 +330,7 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
if (m > scaled_max_m)
break;
- r = _dpll_test_mult(&m, n, &new_rate, target_rate,
+ r = _dpll_test_mult(&m, n, &new_rate, *target_rate,
ref_rate);
/* m can't be set low enough for this n - try with a larger n */
@@ -338,7 +338,7 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
continue;
/* skip rates above our target rate */
- delta = target_rate - new_rate;
+ delta = *target_rate - new_rate;
if (delta < 0)
continue;
@@ -357,14 +357,15 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
if (prev_min_delta == LONG_MAX) {
pr_debug("clock: %s: cannot round to rate %lu\n",
- clk_name, target_rate);
- return ~0;
+ clk_name, *target_rate);
+ return -EINVAL;
}
dd->last_rounded_m = min_delta_m;
dd->last_rounded_n = min_delta_n;
- dd->last_rounded_rate = target_rate - prev_min_delta;
+ dd->last_rounded_rate = *target_rate - prev_min_delta;
- return dd->last_rounded_rate;
+ *target_rate = dd->last_rounded_rate;
+ return 0;
}
diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h
index a56742f..cfe41b7 100644
--- a/arch/arm/mach-omap2/clock.h
+++ b/arch/arm/mach-omap2/clock.h
@@ -194,8 +194,8 @@ u32 omap2_clksel_round_rate_div(struct clk_hw_omap *clk,
u32 *new_div);
u8 omap2_clksel_find_parent_index(struct clk_hw *hw);
unsigned long omap2_clksel_recalc(struct clk_hw *hw, unsigned long parent_rate);
-long omap2_clksel_round_rate(struct clk_hw *hw, unsigned long target_rate,
- unsigned long *parent_rate);
+int omap2_clksel_round_rate(struct clk_hw *hw, unsigned long *target_rate,
+ unsigned long *parent_rate);
int omap2_clksel_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate);
int omap2_clksel_set_parent(struct clk_hw *hw, u8 field_val);
diff --git a/arch/arm/mach-omap2/dpll3xxx.c b/arch/arm/mach-omap2/dpll3xxx.c
index 44e57ec..7a6fb45 100644
--- a/arch/arm/mach-omap2/dpll3xxx.c
+++ b/arch/arm/mach-omap2/dpll3xxx.c
@@ -480,6 +480,7 @@ long omap3_noncore_dpll_determine_rate(struct clk_hw *hw, unsigned long rate,
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
struct dpll_data *dd;
+ int ret;
if (!hw || !rate)
return -EINVAL;
@@ -492,7 +493,10 @@ long omap3_noncore_dpll_determine_rate(struct clk_hw *hw, unsigned long rate,
(dd->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
*best_parent_clk = __clk_get_hw(dd->clk_bypass);
} else {
- rate = omap2_dpll_round_rate(hw, rate, best_parent_rate);
+ ret = omap2_dpll_round_rate(hw, &rate, best_parent_rate);
+ if (ret)
+ return ret;
+
*best_parent_clk = __clk_get_hw(dd->clk_ref);
}
@@ -768,27 +772,33 @@ int omap3_clkoutx2_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
-long omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long rate,
+int omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
const struct dpll_data *dd;
u32 v;
struct clk_hw_omap *pclk = NULL;
- if (!*prate)
+ if (!*prate) {
+ *rate = 0;
return 0;
+ }
pclk = omap3_find_clkoutx2_dpll(hw);
- if (!pclk)
+ if (!pclk) {
+ *rate = 0;
return 0;
+ }
dd = pclk->dpll_data;
/* TYPE J does not have a clkoutx2 */
if (dd->flags & DPLL_J_TYPE) {
- *prate = __clk_round_rate(__clk_get_parent(pclk->hw.clk), rate);
- return *prate;
+ *prate = __clk_round_rate(__clk_get_parent(pclk->hw.clk),
+ *rate);
+ *rate = *prate;
+ return 0;
}
WARN_ON(!dd->enable_mask);
@@ -803,12 +813,13 @@ long omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long rate,
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
unsigned long best_parent;
- best_parent = (rate / 2);
+ best_parent = (*rate / 2);
*prate = __clk_round_rate(__clk_get_parent(hw->clk),
best_parent);
}
- return *prate * 2;
+ *rate = *prate * 2;
+ return 0;
}
/* OMAP3/4 non-CORE DPLL clkops */
diff --git a/arch/arm/mach-omap2/dpll44xx.c b/arch/arm/mach-omap2/dpll44xx.c
index f231be0..afd3284 100644
--- a/arch/arm/mach-omap2/dpll44xx.c
+++ b/arch/arm/mach-omap2/dpll44xx.c
@@ -146,11 +146,12 @@ unsigned long omap4_dpll_regm4xen_recalc(struct clk_hw *hw,
* M-dividers) upon success, -EINVAL if @clk is null or not a DPLL, or
* ~0 if an error occurred in omap2_dpll_round_rate().
*/
-long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
- unsigned long target_rate,
- unsigned long *parent_rate)
+int omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
+ unsigned long *target_rate,
+ unsigned long *parent_rate)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
+ unsigned long rate = *target_rate;
struct dpll_data *dd;
long r;
@@ -166,7 +167,7 @@ long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
* target rate without using the 4X multiplier.
*/
r = omap2_dpll_round_rate(hw, target_rate, NULL);
- if (r != ~0)
+ if (!r)
goto out;
/*
@@ -174,9 +175,9 @@ long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
* this time see if using the 4X multiplier can help. Enabling the
* 4X multiplier is equivalent to dividing the target rate by 4.
*/
- r = omap2_dpll_round_rate(hw, target_rate / OMAP4430_REGM4XEN_MULT,
- NULL);
- if (r == ~0)
+ rate = *target_rate / OMAP4430_REGM4XEN_MULT;
+ r = omap2_dpll_round_rate(hw, &rate, NULL);
+ if (r)
return r;
dd->last_rounded_rate *= OMAP4430_REGM4XEN_MULT;
@@ -184,8 +185,9 @@ long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
out:
omap4_dpll_lpmode_recalc(dd);
+ *target_rate = dd->last_rounded_rate;
- return dd->last_rounded_rate;
+ return 0;
}
/**
@@ -209,6 +211,7 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw, unsigned long rate,
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
struct dpll_data *dd;
+ int ret;
if (!hw || !rate)
return -EINVAL;
@@ -221,8 +224,11 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw, unsigned long rate,
(dd->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
*best_parent_clk = __clk_get_hw(dd->clk_bypass);
} else {
- rate = omap4_dpll_regm4xen_round_rate(hw, rate,
- best_parent_rate);
+ ret = omap4_dpll_regm4xen_round_rate(hw, &rate,
+ best_parent_rate);
+ if (ret)
+ return ret;
+
*best_parent_clk = __clk_get_hw(dd->clk_ref);
}
diff --git a/arch/arm/mach-vexpress/spc.c b/arch/arm/mach-vexpress/spc.c
index f61158c..774ac3b 100644
--- a/arch/arm/mach-vexpress/spc.c
+++ b/arch/arm/mach-vexpress/spc.c
@@ -507,12 +507,19 @@ static unsigned long spc_recalc_rate(struct clk_hw *hw,
return freq * 1000;
}
-static long spc_round_rate(struct clk_hw *hw, unsigned long drate,
+static int spc_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *parent_rate)
{
struct clk_spc *spc = to_clk_spc(hw);
+ long ret;
- return ve_spc_round_performance(spc->cluster, drate);
+ ret = ve_spc_round_performance(spc->cluster, *drate);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+
+ return 0;
}
static int spc_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/mips/alchemy/common/clock.c b/arch/mips/alchemy/common/clock.c
index 6a98d2c..d697d8f 100644
--- a/arch/mips/alchemy/common/clock.c
+++ b/arch/mips/alchemy/common/clock.c
@@ -202,24 +202,27 @@ static int alchemy_clk_aux_setr(struct clk_hw *hw,
return 0;
}
-static long alchemy_clk_aux_roundr(struct clk_hw *hw,
- unsigned long rate,
+static int alchemy_clk_aux_roundr(struct clk_hw *hw,
+ unsigned long *rate,
unsigned long *parent_rate)
{
struct alchemy_auxpll_clk *a = to_auxpll_clk(hw);
unsigned long mult;
- if (!rate || !*parent_rate)
+ if (!*rate || !*parent_rate) {
+ *rate = 0;
return 0;
+ }
- mult = rate / (*parent_rate);
+ mult = *rate / (*parent_rate);
if (mult && (mult < 7))
mult = 7;
if (mult > a->maxmult)
mult = a->maxmult;
- return (*parent_rate) * mult;
+ *rate = (*parent_rate) * mult;
+ return 0;
}
static struct clk_ops alchemy_clkops_aux = {
diff --git a/drivers/clk/at91/clk-h32mx.c b/drivers/clk/at91/clk-h32mx.c
index 152dcb3..e48f31e 100644
--- a/drivers/clk/at91/clk-h32mx.c
+++ b/drivers/clk/at91/clk-h32mx.c
@@ -49,21 +49,25 @@ static unsigned long clk_sama5d4_h32mx_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
-static long clk_sama5d4_h32mx_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_sama5d4_h32mx_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
- if (rate > *parent_rate)
- return *parent_rate;
- div = *parent_rate / 2;
- if (rate < div)
- return div;
+ if (*rate > *parent_rate) {
+ *rate = *parent_rate;
+ return 0;
+ }
- if (rate - div < *parent_rate - rate)
- return div;
+ div = *parent_rate / 2;
+ if (*rate < div || (*rate - div) < (*parent_rate - *rate)) {
+ *rate = div;
+ return 0;
+ }
- return *parent_rate;
+ *rate = *parent_rate;
+ return 0;
}
static int clk_sama5d4_h32mx_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/at91/clk-peripheral.c b/drivers/clk/at91/clk-peripheral.c
index 597fed4..d990ae0 100644
--- a/drivers/clk/at91/clk-peripheral.c
+++ b/drivers/clk/at91/clk-peripheral.c
@@ -227,9 +227,9 @@ clk_sam9x5_peripheral_recalc_rate(struct clk_hw *hw,
return parent_rate >> periph->div;
}
-static long clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long *parent_rate)
+static int clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
int shift = 0;
unsigned long best_rate;
@@ -238,8 +238,10 @@ static long clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
unsigned long cur_diff;
struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw);
- if (periph->id < PERIPHERAL_ID_MIN || !periph->range.max)
- return *parent_rate;
+ if (periph->id < PERIPHERAL_ID_MIN || !periph->range.max) {
+ *rate = *parent_rate;
+ return 0;
+ }
if (periph->range.max) {
for (; shift < PERIPHERAL_MAX_SHIFT; shift++) {
@@ -249,28 +251,31 @@ static long clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
}
}
- if (rate >= cur_rate)
- return cur_rate;
+ if (*rate >= cur_rate) {
+ *rate = cur_rate;
+ return 0;
+ }
- best_diff = cur_rate - rate;
+ best_diff = cur_rate - *rate;
best_rate = cur_rate;
for (; shift < PERIPHERAL_MAX_SHIFT; shift++) {
cur_rate = *parent_rate >> shift;
- if (cur_rate < rate)
- cur_diff = rate - cur_rate;
+ if (cur_rate < *rate)
+ cur_diff = *rate - cur_rate;
else
- cur_diff = cur_rate - rate;
+ cur_diff = cur_rate - *rate;
if (cur_diff < best_diff) {
best_diff = cur_diff;
best_rate = cur_rate;
}
- if (!best_diff || cur_rate < rate)
+ if (!best_diff || cur_rate < *rate)
break;
}
- return best_rate;
+ *rate = best_rate;
+ return 0;
}
static int clk_sam9x5_peripheral_set_rate(struct clk_hw *hw,
diff --git a/drivers/clk/at91/clk-pll.c b/drivers/clk/at91/clk-pll.c
index 6ec79db..e7754eb 100644
--- a/drivers/clk/at91/clk-pll.c
+++ b/drivers/clk/at91/clk-pll.c
@@ -260,13 +260,19 @@ static long clk_pll_get_best_div_mul(struct clk_pll *pll, unsigned long rate,
return bestrate;
}
-static long clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct clk_pll *pll = to_clk_pll(hw);
+ long ret;
- return clk_pll_get_best_div_mul(pll, rate, *parent_rate,
- NULL, NULL, NULL);
+ ret = clk_pll_get_best_div_mul(pll, *rate, *parent_rate,
+ NULL, NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
}
static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/at91/clk-plldiv.c b/drivers/clk/at91/clk-plldiv.c
index ea22656..c267214 100644
--- a/drivers/clk/at91/clk-plldiv.c
+++ b/drivers/clk/at91/clk-plldiv.c
@@ -36,21 +36,23 @@ static unsigned long clk_plldiv_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
-static long clk_plldiv_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_plldiv_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
- if (rate > *parent_rate)
- return *parent_rate;
- div = *parent_rate / 2;
- if (rate < div)
- return div;
+ if (*rate > *parent_rate) {
+ *rate = *parent_rate;
+ return 0;
+ }
- if (rate - div < *parent_rate - rate)
- return div;
+ div = *parent_rate / 2;
+ if (*rate < div || (*rate - div) < (*parent_rate - *rate))
+ *rate = div;
+ else
+ *rate = *parent_rate;
- return *parent_rate;
+ return 0;
}
static int clk_plldiv_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/at91/clk-smd.c b/drivers/clk/at91/clk-smd.c
index 144d47e..cd0f6d2 100644
--- a/drivers/clk/at91/clk-smd.c
+++ b/drivers/clk/at91/clk-smd.c
@@ -43,26 +43,32 @@ static unsigned long at91sam9x5_clk_smd_recalc_rate(struct clk_hw *hw,
return parent_rate / (smddiv + 1);
}
-static long at91sam9x5_clk_smd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int at91sam9x5_clk_smd_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
unsigned long bestrate;
unsigned long tmp;
- if (rate >= *parent_rate)
- return *parent_rate;
+ if (*rate >= *parent_rate) {
+ *rate = *parent_rate;
+ return 0;
+ }
- div = *parent_rate / rate;
- if (div > SMD_MAX_DIV)
- return *parent_rate / (SMD_MAX_DIV + 1);
+ div = *parent_rate / *rate;
+ if (div > SMD_MAX_DIV) {
+ *rate = *parent_rate / (SMD_MAX_DIV + 1);
+ return 0;
+ }
bestrate = *parent_rate / div;
tmp = *parent_rate / (div + 1);
- if (bestrate - rate > rate - tmp)
+ if (bestrate - *rate > *rate - tmp)
bestrate = tmp;
- return bestrate;
+ *rate = bestrate;
+ return 0;
}
static int at91sam9x5_clk_smd_set_parent(struct clk_hw *hw, u8 index)
diff --git a/drivers/clk/at91/clk-usb.c b/drivers/clk/at91/clk-usb.c
index a23ac0c..02599e6 100644
--- a/drivers/clk/at91/clk-usb.c
+++ b/drivers/clk/at91/clk-usb.c
@@ -56,22 +56,26 @@ static unsigned long at91sam9x5_clk_usb_recalc_rate(struct clk_hw *hw,
return DIV_ROUND_CLOSEST(parent_rate, (usbdiv + 1));
}
-static long at91sam9x5_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int at91sam9x5_clk_usb_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
- if (!rate)
+ if (!*rate)
return -EINVAL;
- if (rate >= *parent_rate)
- return *parent_rate;
+ if (*rate >= *parent_rate) {
+ *rate = *parent_rate;
+ return 0;
+ }
- div = DIV_ROUND_CLOSEST(*parent_rate, rate);
+ div = DIV_ROUND_CLOSEST(*parent_rate, *rate);
if (div > SAM9X5_USB_MAX_DIV + 1)
div = SAM9X5_USB_MAX_DIV + 1;
- return DIV_ROUND_CLOSEST(*parent_rate, div);
+ *rate = DIV_ROUND_CLOSEST(*parent_rate, div);
+ return 0;
}
static int at91sam9x5_clk_usb_set_parent(struct clk_hw *hw, u8 index)
@@ -235,8 +239,9 @@ static unsigned long at91rm9200_clk_usb_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long at91rm9200_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int at91rm9200_clk_usb_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
struct at91rm9200_clk_usb *usb = to_at91rm9200_clk_usb(hw);
struct clk *parent = __clk_get_parent(hw->clk);
@@ -252,13 +257,13 @@ static long at91rm9200_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
if (!usb->divisors[i])
continue;
- tmp_parent_rate = rate * usb->divisors[i];
+ tmp_parent_rate = *rate * usb->divisors[i];
tmp_parent_rate = __clk_round_rate(parent, tmp_parent_rate);
tmprate = DIV_ROUND_CLOSEST(tmp_parent_rate, usb->divisors[i]);
- if (tmprate < rate)
- tmpdiff = rate - tmprate;
+ if (tmprate < *rate)
+ tmpdiff = *rate - tmprate;
else
- tmpdiff = tmprate - rate;
+ tmpdiff = tmprate - *rate;
if (bestdiff < 0 || bestdiff > tmpdiff) {
bestrate = tmprate;
@@ -270,7 +275,8 @@ static long at91rm9200_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
break;
}
- return bestrate;
+ *rate = bestrate;
+ return 0;
}
static int at91rm9200_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-axi-clkgen.c b/drivers/clk/clk-axi-clkgen.c
index e619285..3509d50 100644
--- a/drivers/clk/clk-axi-clkgen.c
+++ b/drivers/clk/clk-axi-clkgen.c
@@ -405,7 +405,7 @@ static int axi_clkgen_set_rate(struct clk_hw *clk_hw,
return 0;
}
-static long axi_clkgen_round_rate(struct clk_hw *hw, unsigned long rate,
+static int axi_clkgen_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
unsigned int d, m, dout;
@@ -415,7 +415,8 @@ static long axi_clkgen_round_rate(struct clk_hw *hw, unsigned long rate,
if (d == 0 || dout == 0 || m == 0)
return -EINVAL;
- return *parent_rate / d * m / dout;
+ *rate = *parent_rate / d * m / dout;
+ return 0;
}
static unsigned long axi_clkgen_recalc_rate(struct clk_hw *clk_hw,
diff --git a/drivers/clk/clk-cdce706.c b/drivers/clk/clk-cdce706.c
index c386ad2..f110959 100644
--- a/drivers/clk/clk-cdce706.c
+++ b/drivers/clk/clk-cdce706.c
@@ -187,8 +187,8 @@ static unsigned long cdce706_pll_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long cdce706_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cdce706_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct cdce706_hw_data *hwd = to_hw_data(hw);
unsigned long mul, div;
@@ -196,9 +196,9 @@ static long cdce706_pll_round_rate(struct clk_hw *hw, unsigned long rate,
dev_dbg(&hwd->dev_data->client->dev,
"%s, rate: %lu, parent_rate: %lu\n",
- __func__, rate, *parent_rate);
+ __func__, *rate, *parent_rate);
- rational_best_approximation(rate, *parent_rate,
+ rational_best_approximation(*rate, *parent_rate,
CDCE706_PLL_N_MAX, CDCE706_PLL_M_MAX,
&mul, &div);
hwd->mul = mul;
@@ -210,7 +210,8 @@ static long cdce706_pll_round_rate(struct clk_hw *hw, unsigned long rate,
res = (u64)*parent_rate * hwd->mul;
do_div(res, hwd->div);
- return res;
+ *rate = res;
+ return 0;
}
static int cdce706_pll_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -292,8 +293,8 @@ static unsigned long cdce706_divider_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cdce706_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct cdce706_hw_data *hwd = to_hw_data(hw);
struct cdce706_dev_data *cdce = hwd->dev_data;
@@ -301,31 +302,31 @@ static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
dev_dbg(&hwd->dev_data->client->dev,
"%s, rate: %lu, parent_rate: %lu\n",
- __func__, rate, *parent_rate);
+ __func__, *rate, *parent_rate);
- rational_best_approximation(rate, *parent_rate,
+ rational_best_approximation(*rate, *parent_rate,
1, CDCE706_DIVIDER_DIVIDER_MAX,
&mul, &div);
if (!mul)
div = CDCE706_DIVIDER_DIVIDER_MAX;
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
- unsigned long best_diff = rate;
+ unsigned long best_diff = *rate;
unsigned long best_div = 0;
struct clk *gp_clk = cdce->clkin_clk[cdce->clkin[0].parent];
unsigned long gp_rate = gp_clk ? clk_get_rate(gp_clk) : 0;
- for (div = CDCE706_PLL_FREQ_MIN / rate; best_diff &&
- div <= CDCE706_PLL_FREQ_MAX / rate; ++div) {
+ for (div = CDCE706_PLL_FREQ_MIN / *rate; best_diff &&
+ div <= CDCE706_PLL_FREQ_MAX / *rate; ++div) {
unsigned long n, m;
unsigned long diff;
unsigned long div_rate;
u64 div_rate64;
- if (rate * div < CDCE706_PLL_FREQ_MIN)
+ if (*rate * div < CDCE706_PLL_FREQ_MIN)
continue;
- rational_best_approximation(rate * div, gp_rate,
+ rational_best_approximation(*rate * div, gp_rate,
CDCE706_PLL_N_MAX,
CDCE706_PLL_M_MAX,
&n, &m);
@@ -333,7 +334,7 @@ static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
do_div(div_rate64, m);
do_div(div_rate64, div);
div_rate = div_rate64;
- diff = max(div_rate, rate) - min(div_rate, rate);
+ diff = max(div_rate, *rate) - min(div_rate, *rate);
if (diff < best_diff) {
best_diff = diff;
@@ -348,8 +349,8 @@ static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
dev_dbg(&hwd->dev_data->client->dev,
"%s, altering parent rate: %lu -> %lu\n",
- __func__, *parent_rate, rate * div);
- *parent_rate = rate * div;
+ __func__, *parent_rate, *rate * div);
+ *parent_rate = *rate * div;
}
hwd->div = div;
@@ -357,7 +358,8 @@ static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
"%s, divider: %d, div: %lu\n",
__func__, hwd->idx, div);
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int cdce706_divider_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -425,11 +427,11 @@ static unsigned long cdce706_clkout_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
-static long cdce706_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cdce706_clkout_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
- *parent_rate = rate;
- return rate;
+ *parent_rate = *rate;
+ return 0;
}
static int cdce706_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c
index 956b7e5..f56a71d 100644
--- a/drivers/clk/clk-composite.c
+++ b/drivers/clk/clk-composite.c
@@ -68,10 +68,10 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
struct clk_hw *mux_hw = composite->mux_hw;
struct clk *parent;
unsigned long parent_rate;
- long tmp_rate, best_rate = 0;
+ unsigned long tmp_rate, best_rate = 0;
unsigned long rate_diff;
unsigned long best_rate_diff = ULONG_MAX;
- int i;
+ int ret, i;
if (rate_hw && rate_ops && rate_ops->determine_rate) {
__clk_hw_set_clk(rate_hw, hw);
@@ -88,8 +88,12 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
*best_parent_p = __clk_get_hw(parent);
*best_parent_rate = __clk_get_rate(parent);
- return rate_ops->round_rate(rate_hw, rate,
- best_parent_rate);
+ ret = rate_ops->round_rate(rate_hw, &rate,
+ best_parent_rate);
+ if (ret)
+ return ret;
+
+ return rate;
}
for (i = 0; i < __clk_get_num_parents(mux_hw->clk); i++) {
@@ -99,9 +103,10 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
parent_rate = __clk_get_rate(parent);
- tmp_rate = rate_ops->round_rate(rate_hw, rate,
- &parent_rate);
- if (tmp_rate < 0)
+ tmp_rate = rate;
+ ret = rate_ops->round_rate(rate_hw, &tmp_rate,
+ &parent_rate);
+ if (ret < 0)
continue;
rate_diff = abs(rate - tmp_rate);
@@ -130,8 +135,8 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
}
}
-static long clk_composite_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_composite_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_composite *composite = to_clk_composite(hw);
const struct clk_ops *rate_ops = composite->rate_ops;
diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index 25006a8..f646a0c 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -329,19 +329,20 @@ static int clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
return bestdiv;
}
-long divider_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate, const struct clk_div_table *table,
- u8 width, unsigned long flags)
+int divider_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate, const struct clk_div_table *table,
+ u8 width, unsigned long flags)
{
int div;
- div = clk_divider_bestdiv(hw, rate, prate, table, width, flags);
+ div = clk_divider_bestdiv(hw, *rate, prate, table, width, flags);
- return DIV_ROUND_UP(*prate, div);
+ *rate = DIV_ROUND_UP(*prate, div);
+ return 0;
}
EXPORT_SYMBOL_GPL(divider_round_rate);
-static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_divider *divider = to_clk_divider(hw);
@@ -352,7 +353,8 @@ static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
bestdiv = readl(divider->reg) >> divider->shift;
bestdiv &= div_mask(divider->width);
bestdiv = _get_div(divider->table, bestdiv, divider->flags);
- return DIV_ROUND_UP(*prate, bestdiv);
+ *rate = DIV_ROUND_UP(*prate, bestdiv);
+ return 0;
}
return divider_round_rate(hw, rate, prate, divider->table,
diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.c
index d9e3f67..ff936d0 100644
--- a/drivers/clk/clk-fixed-factor.c
+++ b/drivers/clk/clk-fixed-factor.c
@@ -36,7 +36,7 @@ static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
return (unsigned long)rate;
}
-static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_factor_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_fixed_factor *fix = to_clk_fixed_factor(hw);
@@ -44,12 +44,13 @@ static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
unsigned long best_parent;
- best_parent = (rate / fix->mult) * fix->div;
+ best_parent = (*rate / fix->mult) * fix->div;
*prate = __clk_round_rate(__clk_get_parent(hw->clk),
best_parent);
}
- return (*prate / fix->div) * fix->mult;
+ *rate = (*prate / fix->div) * fix->mult;
+ return 0;
}
static int clk_factor_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c
index 6aa72d9..1f1ba3e 100644
--- a/drivers/clk/clk-fractional-divider.c
+++ b/drivers/clk/clk-fractional-divider.c
@@ -45,24 +45,26 @@ static unsigned long clk_fd_recalc_rate(struct clk_hw *hw,
return ret;
}
-static long clk_fd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_fd_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_fractional_divider *fd = to_clk_fd(hw);
unsigned maxn = (fd->nmask >> fd->nshift) + 1;
unsigned div;
- if (!rate || rate >= *prate)
- return *prate;
+ if (!*rate || *rate >= *prate) {
+ *rate = *prate;
+ return 0;
+ }
- div = gcd(*prate, rate);
+ div = gcd(*prate, *rate);
while ((*prate / div) > maxn) {
div <<= 1;
- rate <<= 1;
+ *rate <<= 1;
}
- return rate;
+ return 0;
}
static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-highbank.c b/drivers/clk/clk-highbank.c
index 2e7e9d9..f26d1b0 100644
--- a/drivers/clk/clk-highbank.c
+++ b/drivers/clk/clk-highbank.c
@@ -142,15 +142,16 @@ static void clk_pll_calc(unsigned long rate, unsigned long ref_freq,
*pdivf = divf;
}
-static long clk_pll_round_rate(struct clk_hw *hwclk, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_pll_round_rate(struct clk_hw *hwclk, unsigned long *rate,
+ unsigned long *parent_rate)
{
u32 divq, divf;
unsigned long ref_freq = *parent_rate;
- clk_pll_calc(rate, ref_freq, &divq, &divf);
+ clk_pll_calc(*rate, ref_freq, &divq, &divf);
- return (ref_freq * (divf + 1)) / (1 << divq);
+ *rate = (ref_freq * (divf + 1)) / (1 << divq);
+ return 0;
}
static int clk_pll_set_rate(struct clk_hw *hwclk, unsigned long rate,
@@ -239,16 +240,17 @@ static unsigned long clk_periclk_recalc_rate(struct clk_hw *hwclk,
return parent_rate / div;
}
-static long clk_periclk_round_rate(struct clk_hw *hwclk, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_periclk_round_rate(struct clk_hw *hwclk, unsigned long *rate,
+ unsigned long *parent_rate)
{
u32 div;
- div = *parent_rate / rate;
+ div = *parent_rate / *rate;
div++;
div &= ~0x1;
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int clk_periclk_set_rate(struct clk_hw *hwclk, unsigned long rate,
diff --git a/drivers/clk/clk-si5351.c b/drivers/clk/clk-si5351.c
index 3b2a66f..8fad555 100644
--- a/drivers/clk/clk-si5351.c
+++ b/drivers/clk/clk-si5351.c
@@ -446,30 +446,30 @@ static unsigned long si5351_pll_recalc_rate(struct clk_hw *hw,
return (unsigned long)rate;
}
-static long si5351_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int si5351_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct si5351_hw_data *hwdata =
container_of(hw, struct si5351_hw_data, hw);
unsigned long rfrac, denom, a, b, c;
unsigned long long lltmp;
- if (rate < SI5351_PLL_VCO_MIN)
- rate = SI5351_PLL_VCO_MIN;
- if (rate > SI5351_PLL_VCO_MAX)
- rate = SI5351_PLL_VCO_MAX;
+ if (*rate < SI5351_PLL_VCO_MIN)
+ *rate = SI5351_PLL_VCO_MIN;
+ if (*rate > SI5351_PLL_VCO_MAX)
+ *rate = SI5351_PLL_VCO_MAX;
/* determine integer part of feedback equation */
- a = rate / *parent_rate;
+ a = *rate / *parent_rate;
if (a < SI5351_PLL_A_MIN)
- rate = *parent_rate * SI5351_PLL_A_MIN;
+ *rate = *parent_rate * SI5351_PLL_A_MIN;
if (a > SI5351_PLL_A_MAX)
- rate = *parent_rate * SI5351_PLL_A_MAX;
+ *rate = *parent_rate * SI5351_PLL_A_MAX;
/* find best approximation for b/c = fVCO mod fIN */
denom = 1000 * 1000;
- lltmp = rate % (*parent_rate);
+ lltmp = *rate % (*parent_rate);
lltmp *= denom;
do_div(lltmp, *parent_rate);
rfrac = (unsigned long)lltmp;
@@ -492,15 +492,15 @@ static long si5351_pll_round_rate(struct clk_hw *hw, unsigned long rate,
lltmp *= b;
do_div(lltmp, c);
- rate = (unsigned long)lltmp;
- rate += *parent_rate * a;
+ *rate = (unsigned long)lltmp;
+ *rate += *parent_rate * a;
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: a = %lu, b = %lu, c = %lu, parent_rate = %lu, rate = %lu\n",
__func__, __clk_get_name(hwdata->hw.clk), a, b, c,
- *parent_rate, rate);
+ *parent_rate, *rate);
- return rate;
+ return 0;
}
static int si5351_pll_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -639,8 +639,8 @@ static unsigned long si5351_msynth_recalc_rate(struct clk_hw *hw,
return (unsigned long)rate;
}
-static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int si5351_msynth_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct si5351_hw_data *hwdata =
container_of(hw, struct si5351_hw_data, hw);
@@ -649,17 +649,17 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
int divby4;
/* multisync6-7 can only handle freqencies < 150MHz */
- if (hwdata->num >= 6 && rate > SI5351_MULTISYNTH67_MAX_FREQ)
- rate = SI5351_MULTISYNTH67_MAX_FREQ;
+ if (hwdata->num >= 6 && *rate > SI5351_MULTISYNTH67_MAX_FREQ)
+ *rate = SI5351_MULTISYNTH67_MAX_FREQ;
/* multisync frequency is 1MHz .. 160MHz */
- if (rate > SI5351_MULTISYNTH_MAX_FREQ)
- rate = SI5351_MULTISYNTH_MAX_FREQ;
- if (rate < SI5351_MULTISYNTH_MIN_FREQ)
- rate = SI5351_MULTISYNTH_MIN_FREQ;
+ if (*rate > SI5351_MULTISYNTH_MAX_FREQ)
+ *rate = SI5351_MULTISYNTH_MAX_FREQ;
+ if (*rate < SI5351_MULTISYNTH_MIN_FREQ)
+ *rate = SI5351_MULTISYNTH_MIN_FREQ;
divby4 = 0;
- if (rate > SI5351_MULTISYNTH_DIVBY4_FREQ)
+ if (*rate > SI5351_MULTISYNTH_DIVBY4_FREQ)
divby4 = 1;
/* multisync can set pll */
@@ -670,7 +670,7 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
*/
if (divby4 == 0) {
lltmp = SI5351_PLL_VCO_MAX;
- do_div(lltmp, rate);
+ do_div(lltmp, *rate);
a = (unsigned long)lltmp;
} else
a = 4;
@@ -678,18 +678,18 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
b = 0;
c = 1;
- *parent_rate = a * rate;
+ *parent_rate = a * *rate;
} else {
unsigned long rfrac, denom;
/* disable divby4 */
if (divby4) {
- rate = SI5351_MULTISYNTH_DIVBY4_FREQ;
+ *rate = SI5351_MULTISYNTH_DIVBY4_FREQ;
divby4 = 0;
}
/* determine integer part of divider equation */
- a = *parent_rate / rate;
+ a = *parent_rate / *rate;
if (a < SI5351_MULTISYNTH_A_MIN)
a = SI5351_MULTISYNTH_A_MIN;
if (hwdata->num >= 6 && a > SI5351_MULTISYNTH67_A_MAX)
@@ -699,9 +699,9 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
/* find best approximation for b/c = fVCO mod fOUT */
denom = 1000 * 1000;
- lltmp = (*parent_rate) % rate;
+ lltmp = (*parent_rate) % *rate;
lltmp *= denom;
- do_div(lltmp, rate);
+ do_div(lltmp, *rate);
rfrac = (unsigned long)lltmp;
b = 0;
@@ -716,7 +716,7 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
lltmp = *parent_rate;
lltmp *= c;
do_div(lltmp, a * c + b);
- rate = (unsigned long)lltmp;
+ *rate = (unsigned long)lltmp;
/* calculate parameters */
if (divby4) {
@@ -734,9 +734,9 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: a = %lu, b = %lu, c = %lu, divby4 = %d, parent_rate = %lu, rate = %lu\n",
__func__, __clk_get_name(hwdata->hw.clk), a, b, c, divby4,
- *parent_rate, rate);
+ *parent_rate, *rate);
- return rate;
+ return 0;
}
static int si5351_msynth_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -983,57 +983,57 @@ static unsigned long si5351_clkout_recalc_rate(struct clk_hw *hw,
return parent_rate >> rdiv;
}
-static long si5351_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int si5351_clkout_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct si5351_hw_data *hwdata =
container_of(hw, struct si5351_hw_data, hw);
unsigned char rdiv;
/* clkout6/7 can only handle output freqencies < 150MHz */
- if (hwdata->num >= 6 && rate > SI5351_CLKOUT67_MAX_FREQ)
- rate = SI5351_CLKOUT67_MAX_FREQ;
+ if (hwdata->num >= 6 && *rate > SI5351_CLKOUT67_MAX_FREQ)
+ *rate = SI5351_CLKOUT67_MAX_FREQ;
/* clkout freqency is 8kHz - 160MHz */
- if (rate > SI5351_CLKOUT_MAX_FREQ)
- rate = SI5351_CLKOUT_MAX_FREQ;
- if (rate < SI5351_CLKOUT_MIN_FREQ)
- rate = SI5351_CLKOUT_MIN_FREQ;
+ if (*rate > SI5351_CLKOUT_MAX_FREQ)
+ *rate = SI5351_CLKOUT_MAX_FREQ;
+ if (*rate < SI5351_CLKOUT_MIN_FREQ)
+ *rate = SI5351_CLKOUT_MIN_FREQ;
/* request frequency if multisync master */
if (__clk_get_flags(hwdata->hw.clk) & CLK_SET_RATE_PARENT) {
/* use r divider for frequencies below 1MHz */
rdiv = SI5351_OUTPUT_CLK_DIV_1;
- while (rate < SI5351_MULTISYNTH_MIN_FREQ &&
+ while (*rate < SI5351_MULTISYNTH_MIN_FREQ &&
rdiv < SI5351_OUTPUT_CLK_DIV_128) {
rdiv += 1;
- rate *= 2;
+ *rate *= 2;
}
- *parent_rate = rate;
+ *parent_rate = *rate;
} else {
unsigned long new_rate, new_err, err;
/* round to closed rdiv */
rdiv = SI5351_OUTPUT_CLK_DIV_1;
new_rate = *parent_rate;
- err = abs(new_rate - rate);
+ err = abs(new_rate - *rate);
do {
new_rate >>= 1;
- new_err = abs(new_rate - rate);
+ new_err = abs(new_rate - *rate);
if (new_err > err || rdiv == SI5351_OUTPUT_CLK_DIV_128)
break;
rdiv++;
err = new_err;
} while (1);
}
- rate = *parent_rate >> rdiv;
+ *rate = *parent_rate >> rdiv;
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: rdiv = %u, parent_rate = %lu, rate = %lu\n",
__func__, __clk_get_name(hwdata->hw.clk), (1 << rdiv),
- *parent_rate, rate);
+ *parent_rate, *rate);
- return rate;
+ return 0;
}
static int si5351_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-si570.c b/drivers/clk/clk-si570.c
index fc167b3..0680863 100644
--- a/drivers/clk/clk-si570.c
+++ b/drivers/clk/clk-si570.c
@@ -245,7 +245,7 @@ static unsigned long si570_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long si570_round_rate(struct clk_hw *hw, unsigned long rate,
+static int si570_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
int err;
@@ -253,26 +253,26 @@ static long si570_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned int n1, hs_div;
struct clk_si570 *data = to_clk_si570(hw);
- if (!rate)
+ if (!*rate)
return 0;
- if (div64_u64(abs(rate - data->frequency) * 10000LL,
+ if (div64_u64(abs(*rate - data->frequency) * 10000LL,
data->frequency) < 35) {
- rfreq = div64_u64((data->rfreq * rate) +
+ rfreq = div64_u64((data->rfreq * *rate) +
div64_u64(data->frequency, 2), data->frequency);
n1 = data->n1;
hs_div = data->hs_div;
} else {
- err = si570_calc_divs(rate, data, &rfreq, &n1, &hs_div);
+ err = si570_calc_divs(*rate, data, &rfreq, &n1, &hs_div);
if (err) {
dev_err(&data->i2c_client->dev,
"unable to round rate\n");
- return 0;
+ *rate = 0;
}
}
- return rate;
+ return 0;
}
/**
diff --git a/drivers/clk/clk-u300.c b/drivers/clk/clk-u300.c
index 406bfc1..5e3163b 100644
--- a/drivers/clk/clk-u300.c
+++ b/drivers/clk/clk-u300.c
@@ -628,22 +628,27 @@ syscon_clk_recalc_rate(struct clk_hw *hw,
}
}
-static long
-syscon_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int
+syscon_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_syscon *sclk = to_syscon(hw);
- if (sclk->clk_val != U300_SYSCON_SBCER_CPU_CLK_EN)
- return *prate;
+ if (sclk->clk_val != U300_SYSCON_SBCER_CPU_CLK_EN) {
+ *rate = *prate;
+ return 0;
+ }
/* We really only support setting the rate of the CPU clock */
- if (rate <= 13000000)
- return 13000000;
- if (rate <= 52000000)
- return 52000000;
- if (rate <= 104000000)
- return 104000000;
- return 208000000;
+ if (*rate <= 13000000)
+ *rate = 13000000;
+ else if (*rate <= 52000000)
+ *rate = 52000000;
+ else if (*rate <= 104000000)
+ *rate = 104000000;
+ else
+ *rate = 208000000;
+
+ return 0;
}
static int syscon_clk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -1037,26 +1042,28 @@ mclk_clk_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
-static long
-mclk_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int
+mclk_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
- if (rate <= 18900000)
- return 18900000;
- if (rate <= 20800000)
- return 20800000;
- if (rate <= 23100000)
- return 23100000;
- if (rate <= 26000000)
- return 26000000;
- if (rate <= 29700000)
- return 29700000;
- if (rate <= 34700000)
- return 34700000;
- if (rate <= 41600000)
- return 41600000;
- /* Highest rate */
- return 52000000;
+ if (*rate <= 18900000)
+ *rate = 18900000;
+ else if (*rate <= 20800000)
+ *rate = 20800000;
+ else if (*rate <= 23100000)
+ *rate = 23100000;
+ else if (*rate <= 26000000)
+ *rate = 26000000;
+ else if (*rate <= 29700000)
+ *rate = 29700000;
+ else if (*rate <= 34700000)
+ *rate = 34700000;
+ else if (*rate <= 41600000)
+ *rate = 41600000;
+ else
+ *rate = 52000000;
+
+ return 0;
}
static int mclk_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-vt8500.c b/drivers/clk/clk-vt8500.c
index 37e9288..221eec3 100644
--- a/drivers/clk/clk-vt8500.c
+++ b/drivers/clk/clk-vt8500.c
@@ -137,19 +137,19 @@ static unsigned long vt8500_dclk_recalc_rate(struct clk_hw *hw,
return parent_rate / div;
}
-static long vt8500_dclk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int vt8500_dclk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_device *cdev = to_clk_device(hw);
u32 divisor;
- if (rate == 0)
+ if (*rate == 0)
return 0;
- divisor = *prate / rate;
+ divisor = *prate / *rate;
/* If prate / rate would be decimal, incr the divisor */
- if (rate * divisor < *prate)
+ if (*rate * divisor < *prate)
divisor++;
/*
@@ -160,7 +160,8 @@ static long vt8500_dclk_round_rate(struct clk_hw *hw, unsigned long rate,
divisor = 64 * ((divisor / 64) + 1);
}
- return *prate / divisor;
+ *rate = *prate / divisor;
+ return 0;
}
static int vt8500_dclk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -579,8 +580,8 @@ static int vtwm_pll_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
-static long vtwm_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int vtwm_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_pll *pll = to_clk_pll(hw);
u32 filter, mul, div1, div2;
@@ -588,26 +589,28 @@ static long vtwm_pll_round_rate(struct clk_hw *hw, unsigned long rate,
switch (pll->type) {
case PLL_TYPE_VT8500:
- vt8500_find_pll_bits(rate, *prate, &mul, &div1);
+ vt8500_find_pll_bits(*rate, *prate, &mul, &div1);
round_rate = VT8500_BITS_TO_FREQ(*prate, mul, div1);
break;
case PLL_TYPE_WM8650:
- wm8650_find_pll_bits(rate, *prate, &mul, &div1, &div2);
+ wm8650_find_pll_bits(*rate, *prate, &mul, &div1, &div2);
round_rate = WM8650_BITS_TO_FREQ(*prate, mul, div1, div2);
break;
case PLL_TYPE_WM8750:
- wm8750_find_pll_bits(rate, *prate, &filter, &mul, &div1, &div2);
+ wm8750_find_pll_bits(*rate, *prate, &filter, &mul, &div1,
+ &div2);
round_rate = WM8750_BITS_TO_FREQ(*prate, mul, div1, div2);
break;
case PLL_TYPE_WM8850:
- wm8850_find_pll_bits(rate, *prate, &mul, &div1, &div2);
+ wm8850_find_pll_bits(*rate, *prate, &mul, &div1, &div2);
round_rate = WM8850_BITS_TO_FREQ(*prate, mul, div1, div2);
break;
default:
round_rate = 0;
}
- return round_rate;
+ *rate = round_rate;
+ return 0;
}
static unsigned long vtwm_pll_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/clk-wm831x.c b/drivers/clk/clk-wm831x.c
index ef67719..23db1b5 100644
--- a/drivers/clk/clk-wm831x.c
+++ b/drivers/clk/clk-wm831x.c
@@ -142,18 +142,19 @@ static unsigned long wm831x_fll_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long wm831x_fll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *unused)
+static int wm831x_fll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *unused)
{
int best = 0;
int i;
for (i = 0; i < ARRAY_SIZE(wm831x_fll_auto_rates); i++)
- if (abs(wm831x_fll_auto_rates[i] - rate) <
- abs(wm831x_fll_auto_rates[best] - rate))
+ if (abs(wm831x_fll_auto_rates[i] - *rate) <
+ abs(wm831x_fll_auto_rates[best] - *rate))
best = i;
- return wm831x_fll_auto_rates[best];
+ *rate = wm831x_fll_auto_rates[best];
+ return 0;
}
static int wm831x_fll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-xgene.c b/drivers/clk/clk-xgene.c
index dd8a62d..27460e3 100644
--- a/drivers/clk/clk-xgene.c
+++ b/drivers/clk/clk-xgene.c
@@ -367,7 +367,7 @@ static int xgene_clk_set_rate(struct clk_hw *hw, unsigned long rate,
return parent_rate / divider_save;
}
-static long xgene_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int xgene_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct xgene_clk *pclk = to_xgene_clk(hw);
@@ -376,14 +376,15 @@ static long xgene_clk_round_rate(struct clk_hw *hw, unsigned long rate,
if (pclk->param.divider_reg) {
/* Let's compute the divider */
- if (rate > parent_rate)
- rate = parent_rate;
- divider = parent_rate / rate; /* Rounded down */
+ if (*rate > parent_rate)
+ *rate = parent_rate;
+ divider = parent_rate / *rate; /* Rounded down */
} else {
divider = 1;
}
- return parent_rate / divider;
+ *rate = parent_rate / divider;
+ return 0;
}
const struct clk_ops xgene_clk_ops = {
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index fa5a00e..1462ddc 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1146,9 +1146,12 @@ static unsigned long clk_core_round_rate_nolock(struct clk_core *clk,
return clk->ops->determine_rate(clk->hw, rate,
min_rate, max_rate,
&parent_rate, &parent_hw);
- } else if (clk->ops->round_rate)
- return clk->ops->round_rate(clk->hw, rate, &parent_rate);
- else if (clk->flags & CLK_SET_RATE_PARENT)
+ } else if (clk->ops->round_rate) {
+ if (clk->ops->round_rate(clk->hw, &rate, &parent_rate))
+ return 0;
+
+ return rate;
+ } else if (clk->flags & CLK_SET_RATE_PARENT)
return clk_core_round_rate_nolock(clk->parent, rate, min_rate,
max_rate);
else
@@ -1640,8 +1643,10 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *clk,
&parent_hw);
parent = parent_hw ? parent_hw->core : NULL;
} else if (clk->ops->round_rate) {
- new_rate = clk->ops->round_rate(clk->hw, rate,
- &best_parent_rate);
+ if (clk->ops->round_rate(clk->hw, &new_rate,
+ &best_parent_rate))
+ return NULL;
+
if (new_rate < min_rate || new_rate > max_rate)
return NULL;
} else if (!parent || !(clk->flags & CLK_SET_RATE_PARENT)) {
diff --git a/drivers/clk/mmp/clk-frac.c b/drivers/clk/mmp/clk-frac.c
index 584a992..6652983 100644
--- a/drivers/clk/mmp/clk-frac.c
+++ b/drivers/clk/mmp/clk-frac.c
@@ -24,7 +24,7 @@
#define to_clk_factor(hw) container_of(hw, struct mmp_clk_factor, hw)
-static long clk_factor_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_factor_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct mmp_clk_factor *factor = to_clk_factor(hw);
@@ -35,17 +35,19 @@ static long clk_factor_round_rate(struct clk_hw *hw, unsigned long drate,
prev_rate = rate;
rate = (((*prate / 10000) * factor->ftbl[i].den) /
(factor->ftbl[i].num * factor->masks->factor)) * 10000;
- if (rate > drate)
+ if (rate > *drate)
break;
}
if ((i == 0) || (i == factor->ftbl_cnt)) {
- return rate;
+ *drate = rate;
} else {
- if ((drate - prev_rate) > (rate - drate))
- return rate;
+ if ((*drate - prev_rate) > (rate - *drate))
+ *drate = rate;
else
- return prev_rate;
+ *drate = prev_rate;
}
+
+ return 0;
}
static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/mvebu/clk-corediv.c b/drivers/clk/mvebu/clk-corediv.c
index d1e5863..c5aee2f 100644
--- a/drivers/clk/mvebu/clk-corediv.c
+++ b/drivers/clk/mvebu/clk-corediv.c
@@ -132,19 +132,20 @@ static unsigned long clk_corediv_recalc_rate(struct clk_hw *hwclk,
return parent_rate / div;
}
-static long clk_corediv_round_rate(struct clk_hw *hwclk, unsigned long rate,
+static int clk_corediv_round_rate(struct clk_hw *hwclk, unsigned long *rate,
unsigned long *parent_rate)
{
/* Valid ratio are 1:4, 1:5, 1:6 and 1:8 */
u32 div;
- div = *parent_rate / rate;
+ div = *parent_rate / *rate;
if (div < 4)
div = 4;
else if (div > 6)
div = 8;
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int clk_corediv_set_rate(struct clk_hw *hwclk, unsigned long rate,
diff --git a/drivers/clk/mvebu/clk-cpu.c b/drivers/clk/mvebu/clk-cpu.c
index 3821a88..0279b50 100644
--- a/drivers/clk/mvebu/clk-cpu.c
+++ b/drivers/clk/mvebu/clk-cpu.c
@@ -57,19 +57,20 @@ static unsigned long clk_cpu_recalc_rate(struct clk_hw *hwclk,
return parent_rate / div;
}
-static long clk_cpu_round_rate(struct clk_hw *hwclk, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_cpu_round_rate(struct clk_hw *hwclk, unsigned long *rate,
+ unsigned long *parent_rate)
{
/* Valid ratio are 1:1, 1:2 and 1:3 */
u32 div;
- div = *parent_rate / rate;
+ div = *parent_rate / *rate;
if (div == 0)
div = 1;
else if (div > 3)
div = 3;
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int clk_cpu_off_set_rate(struct clk_hw *hwclk, unsigned long rate,
diff --git a/drivers/clk/mxs/clk-div.c b/drivers/clk/mxs/clk-div.c
index 90e1da9..3677e51 100644
--- a/drivers/clk/mxs/clk-div.c
+++ b/drivers/clk/mxs/clk-div.c
@@ -47,8 +47,8 @@ static unsigned long clk_div_recalc_rate(struct clk_hw *hw,
return div->ops->recalc_rate(&div->divider.hw, parent_rate);
}
-static long clk_div_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_div_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_div *div = to_clk_div(hw);
diff --git a/drivers/clk/mxs/clk-frac.c b/drivers/clk/mxs/clk-frac.c
index e6aa6b5..86fc3bb 100644
--- a/drivers/clk/mxs/clk-frac.c
+++ b/drivers/clk/mxs/clk-frac.c
@@ -49,18 +49,18 @@ static unsigned long clk_frac_recalc_rate(struct clk_hw *hw,
return (parent_rate >> frac->width) * div;
}
-static long clk_frac_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_frac_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_frac *frac = to_clk_frac(hw);
unsigned long parent_rate = *prate;
u32 div;
u64 tmp;
- if (rate > parent_rate)
+ if (*rate > parent_rate)
return -EINVAL;
- tmp = rate;
+ tmp = *rate;
tmp <<= frac->width;
do_div(tmp, parent_rate);
div = tmp;
@@ -68,7 +68,8 @@ static long clk_frac_round_rate(struct clk_hw *hw, unsigned long rate,
if (!div)
return -EINVAL;
- return (parent_rate >> frac->width) * div;
+ *rate = (parent_rate >> frac->width) * div;
+ return 0;
}
static int clk_frac_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/mxs/clk-ref.c b/drivers/clk/mxs/clk-ref.c
index 4adeed6..e0d6529 100644
--- a/drivers/clk/mxs/clk-ref.c
+++ b/drivers/clk/mxs/clk-ref.c
@@ -64,15 +64,15 @@ static unsigned long clk_ref_recalc_rate(struct clk_hw *hw,
return tmp;
}
-static long clk_ref_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_ref_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long parent_rate = *prate;
u64 tmp = parent_rate;
u8 frac;
- tmp = tmp * 18 + rate / 2;
- do_div(tmp, rate);
+ tmp = tmp * 18 + *rate / 2;
+ do_div(tmp, *rate);
frac = tmp;
if (frac < 18)
@@ -83,8 +83,9 @@ static long clk_ref_round_rate(struct clk_hw *hw, unsigned long rate,
tmp = parent_rate;
tmp *= 18;
do_div(tmp, frac);
+ *rate = tmp;
- return tmp;
+ return 0;
}
static int clk_ref_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/qcom/clk-regmap-divider.c b/drivers/clk/qcom/clk-regmap-divider.c
index 5348491..1720da4 100644
--- a/drivers/clk/qcom/clk-regmap-divider.c
+++ b/drivers/clk/qcom/clk-regmap-divider.c
@@ -23,8 +23,8 @@ static inline struct clk_regmap_div *to_clk_regmap_div(struct clk_hw *hw)
return container_of(to_clk_regmap(hw), struct clk_regmap_div, clkr);
}
-static long div_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int div_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_regmap_div *divider = to_clk_regmap_div(hw);
diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
index f8d3baf..bd408ef 100644
--- a/drivers/clk/rockchip/clk-pll.c
+++ b/drivers/clk/rockchip/clk-pll.c
@@ -63,8 +63,8 @@ static const struct rockchip_pll_rate_table *rockchip_get_pll_settings(
return NULL;
}
-static long rockchip_pll_round_rate(struct clk_hw *hw,
- unsigned long drate, unsigned long *prate)
+static int rockchip_pll_round_rate(struct clk_hw *hw,
+ unsigned long *drate, unsigned long *prate)
{
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
const struct rockchip_pll_rate_table *rate_table = pll->rate_table;
@@ -72,12 +72,15 @@ static long rockchip_pll_round_rate(struct clk_hw *hw,
/* Assumming rate_table is in descending order */
for (i = 0; i < pll->rate_count; i++) {
- if (drate >= rate_table[i].rate)
- return rate_table[i].rate;
+ if (*drate >= rate_table[i].rate) {
+ *drate = rate_table[i].rate;
+ return 0;
+ }
}
/* return minimum supported value */
- return rate_table[i - 1].rate;
+ *drate = rate_table[i - 1].rate;
+ return 0;
}
/*
diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c
index 9d70e5c..0128de2 100644
--- a/drivers/clk/samsung/clk-pll.c
+++ b/drivers/clk/samsung/clk-pll.c
@@ -42,8 +42,8 @@ static const struct samsung_pll_rate_table *samsung_get_pll_settings(
return NULL;
}
-static long samsung_pll_round_rate(struct clk_hw *hw,
- unsigned long drate, unsigned long *prate)
+static int samsung_pll_round_rate(struct clk_hw *hw,
+ unsigned long *drate, unsigned long *prate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
const struct samsung_pll_rate_table *rate_table = pll->rate_table;
@@ -51,12 +51,15 @@ static long samsung_pll_round_rate(struct clk_hw *hw,
/* Assumming rate_table is in descending order */
for (i = 0; i < pll->rate_count; i++) {
- if (drate >= rate_table[i].rate)
- return rate_table[i].rate;
+ if (*drate >= rate_table[i].rate) {
+ *drate = rate_table[i].rate;
+ return 0;
+ }
}
/* return minimum supported value */
- return rate_table[i - 1].rate;
+ *drate = rate_table[i - 1].rate;
+ return 0;
}
/*
diff --git a/drivers/clk/shmobile/clk-div6.c b/drivers/clk/shmobile/clk-div6.c
index 036a692..d31ae3d 100644
--- a/drivers/clk/shmobile/clk-div6.c
+++ b/drivers/clk/shmobile/clk-div6.c
@@ -97,12 +97,13 @@ static unsigned int cpg_div6_clock_calc_div(unsigned long rate,
return clamp_t(unsigned int, div, 1, 64);
}
-static long cpg_div6_clock_round_rate(struct clk_hw *hw, unsigned long rate,
+static int cpg_div6_clock_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- unsigned int div = cpg_div6_clock_calc_div(rate, *parent_rate);
+ unsigned int div = cpg_div6_clock_calc_div(*rate, *parent_rate);
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int cpg_div6_clock_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/shmobile/clk-rcar-gen2.c b/drivers/clk/shmobile/clk-rcar-gen2.c
index acfb6d7..57581a9 100644
--- a/drivers/clk/shmobile/clk-rcar-gen2.c
+++ b/drivers/clk/shmobile/clk-rcar-gen2.c
@@ -68,8 +68,8 @@ static unsigned long cpg_z_clk_recalc_rate(struct clk_hw *hw,
return div_u64((u64)parent_rate * mult, 32);
}
-static long cpg_z_clk_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cpg_z_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long prate = *parent_rate;
unsigned int mult;
@@ -77,10 +77,11 @@ static long cpg_z_clk_round_rate(struct clk_hw *hw, unsigned long rate,
if (!prate)
prate = 1;
- mult = div_u64((u64)rate * 32, prate);
+ mult = div_u64((u64)*rate * 32, prate);
mult = clamp(mult, 1U, 32U);
- return *parent_rate / 32 * mult;
+ *rate = *parent_rate / 32 * mult;
+ return 0;
}
static int cpg_z_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/sirf/clk-common.c b/drivers/clk/sirf/clk-common.c
index 37af51c..68a7889 100644
--- a/drivers/clk/sirf/clk-common.c
+++ b/drivers/clk/sirf/clk-common.c
@@ -91,7 +91,7 @@ static unsigned long pll_clk_recalc_rate(struct clk_hw *hw,
}
}
-static long pll_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int pll_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
unsigned long fin, nf, nr, od;
@@ -101,9 +101,9 @@ static long pll_clk_round_rate(struct clk_hw *hw, unsigned long rate,
* fout = fin * nf / (nr * od);
* set od = 1, nr = fin/MHz, so fout = nf * MHz
*/
- rate = rate - rate % MHZ;
+ *rate = *rate - *rate % MHZ;
- nf = rate / MHZ;
+ nf = *rate / MHZ;
if (nf > BIT(13))
nf = BIT(13);
if (nf < 1)
@@ -119,7 +119,8 @@ static long pll_clk_round_rate(struct clk_hw *hw, unsigned long rate,
dividend = (u64)fin * nf;
do_div(dividend, nr * od);
- return (long)dividend;
+ *rate = dividend;
+ return 0;
}
static int pll_clk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -158,7 +159,7 @@ static int pll_clk_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
-static long cpu_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int cpu_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
/*
@@ -347,7 +348,7 @@ static unsigned long dmn_clk_recalc_rate(struct clk_hw *hw,
}
}
-static long dmn_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int dmn_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
unsigned long fin;
@@ -355,7 +356,7 @@ static long dmn_clk_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned bits = (strcmp(hw->init->name, "mem") == 0) ? 3 : 4;
fin = *parent_rate;
- ratio = fin / rate;
+ ratio = fin / *rate;
if (ratio < 2)
ratio = 2;
@@ -365,7 +366,8 @@ static long dmn_clk_round_rate(struct clk_hw *hw, unsigned long rate,
wait = (ratio >> 1) - 1;
hold = ratio - wait - 2;
- return fin / (wait + hold + 2);
+ *rate = fin / (wait + hold + 2);
+ return 0;
}
static int dmn_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/spear/clk-aux-synth.c b/drivers/clk/spear/clk-aux-synth.c
index bdfb442..1a93f6a 100644
--- a/drivers/clk/spear/clk-aux-synth.c
+++ b/drivers/clk/spear/clk-aux-synth.c
@@ -52,14 +52,20 @@ static unsigned long aux_calc_rate(struct clk_hw *hw, unsigned long prate,
(rtbl[index].yscale * eq)) * 10000;
}
-static long clk_aux_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_aux_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_aux *aux = to_clk_aux(hw);
int unused;
+ long ret;
- return clk_round_rate_index(hw, drate, *prate, aux_calc_rate,
+ ret = clk_round_rate_index(hw, *drate, *prate, aux_calc_rate,
aux->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_aux_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/spear/clk-frac-synth.c b/drivers/clk/spear/clk-frac-synth.c
index dffd4ce..d4098c8 100644
--- a/drivers/clk/spear/clk-frac-synth.c
+++ b/drivers/clk/spear/clk-frac-synth.c
@@ -55,14 +55,20 @@ static unsigned long frac_calc_rate(struct clk_hw *hw, unsigned long prate,
return prate;
}
-static long clk_frac_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_frac_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_frac *frac = to_clk_frac(hw);
int unused;
+ long ret;
- return clk_round_rate_index(hw, drate, *prate, frac_calc_rate,
+ ret = clk_round_rate_index(hw, *drate, *prate, frac_calc_rate,
frac->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_frac_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/spear/clk-gpt-synth.c b/drivers/clk/spear/clk-gpt-synth.c
index 1afc18c..ea3328b 100644
--- a/drivers/clk/spear/clk-gpt-synth.c
+++ b/drivers/clk/spear/clk-gpt-synth.c
@@ -42,14 +42,20 @@ static unsigned long gpt_calc_rate(struct clk_hw *hw, unsigned long prate,
return prate;
}
-static long clk_gpt_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_gpt_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_gpt *gpt = to_clk_gpt(hw);
int unused;
+ long ret;
- return clk_round_rate_index(hw, drate, *prate, gpt_calc_rate,
+ ret = clk_round_rate_index(hw, *drate, *prate, gpt_calc_rate,
gpt->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_gpt_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/spear/clk-vco-pll.c b/drivers/clk/spear/clk-vco-pll.c
index 1b9b65b..08b1411 100644
--- a/drivers/clk/spear/clk-vco-pll.c
+++ b/drivers/clk/spear/clk-vco-pll.c
@@ -113,12 +113,18 @@ static long clk_pll_round_rate_index(struct clk_hw *hw, unsigned long drate,
return rate;
}
-static long clk_pll_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_pll_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
int unused;
+ long ret;
- return clk_pll_round_rate_index(hw, drate, prate, &unused);
+ ret = clk_pll_round_rate_index(hw, *drate, prate, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_pll_recalc_rate(struct clk_hw *hw, unsigned long
@@ -179,14 +185,20 @@ static inline unsigned long vco_calc_rate(struct clk_hw *hw,
return pll_calc_rate(vco->rtbl, prate, index, NULL);
}
-static long clk_vco_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_vco_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_vco *vco = to_clk_vco(hw);
int unused;
+ long ret;
- return clk_round_rate_index(hw, drate, *prate, vco_calc_rate,
+ ret = clk_round_rate_index(hw, *drate, *prate, vco_calc_rate,
vco->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_vco_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/st/clk-flexgen.c b/drivers/clk/st/clk-flexgen.c
index bf12a25..d04278b 100644
--- a/drivers/clk/st/clk-flexgen.c
+++ b/drivers/clk/st/clk-flexgen.c
@@ -100,20 +100,21 @@ clk_best_div(unsigned long parent_rate, unsigned long rate)
return parent_rate / rate + ((rate > (2*(parent_rate % rate))) ? 0 : 1);
}
-static long flexgen_round_rate(struct clk_hw *hw, unsigned long rate,
+static int flexgen_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
unsigned long div;
/* Round div according to exact prate and wished rate */
- div = clk_best_div(*prate, rate);
+ div = clk_best_div(*prate, *rate);
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
- *prate = rate * div;
- return rate;
+ *prate = *rate * div;
+ return 0;
}
- return *prate / div;
+ *rate = *prate / div;
+ return 0;
}
unsigned long flexgen_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/st/clkgen-fsyn.c b/drivers/clk/st/clkgen-fsyn.c
index af94ed8..7c70049 100644
--- a/drivers/clk/st/clkgen-fsyn.c
+++ b/drivers/clk/st/clkgen-fsyn.c
@@ -548,21 +548,22 @@ int clk_fs660c32_vco_get_params(unsigned long input,
return 0;
}
-static long quadfs_pll_fs660c32_round_rate(struct clk_hw *hw, unsigned long rate
- , unsigned long *prate)
+static int quadfs_pll_fs660c32_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *prate)
{
struct stm_fs params;
- if (!clk_fs660c32_vco_get_params(*prate, rate, ¶ms))
- clk_fs660c32_vco_get_rate(*prate, ¶ms, &rate);
+ if (!clk_fs660c32_vco_get_params(*prate, *rate, ¶ms))
+ clk_fs660c32_vco_get_rate(*prate, ¶ms, rate);
pr_debug("%s: %s new rate %ld [sdiv=0x%x,md=0x%x,pe=0x%x,nsdiv3=%u]\n",
__func__, __clk_get_name(hw->clk),
- rate, (unsigned int)params.sdiv,
+ *rate, (unsigned int)params.sdiv,
(unsigned int)params.mdiv,
(unsigned int)params.pe, (unsigned int)params.nsdiv);
- return rate;
+ return 0;
}
static int quadfs_pll_fs660c32_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -953,19 +954,19 @@ static unsigned long quadfs_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long quadfs_round_rate(struct clk_hw *hw, unsigned long rate,
+static int quadfs_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct stm_fs params;
- rate = quadfs_find_best_rate(hw, rate, *prate, ¶ms);
+ *rate = quadfs_find_best_rate(hw, *rate, *prate, ¶ms);
pr_debug("%s: %s new rate %ld [sdiv=0x%x,md=0x%x,pe=0x%x,nsdiv3=%u]\n",
__func__, __clk_get_name(hw->clk),
- rate, (unsigned int)params.sdiv, (unsigned int)params.mdiv,
+ *rate, (unsigned int)params.sdiv, (unsigned int)params.mdiv,
(unsigned int)params.pe, (unsigned int)params.nsdiv);
- return rate;
+ return 0;
}
diff --git a/drivers/clk/st/clkgen-mux.c b/drivers/clk/st/clkgen-mux.c
index 9a15ec3..2bbcb7b 100644
--- a/drivers/clk/st/clkgen-mux.c
+++ b/drivers/clk/st/clkgen-mux.c
@@ -190,7 +190,7 @@ static int clkgena_divmux_set_rate(struct clk_hw *hw, unsigned long rate,
return clk_divider_ops.set_rate(div_hw, rate, parent_rate);
}
-static long clkgena_divmux_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clkgena_divmux_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clkgena_divmux *genamux = to_clkgena_divmux(hw);
diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factors.c
index 8c20190..5865300 100644
--- a/drivers/clk/sunxi/clk-factors.c
+++ b/drivers/clk/sunxi/clk-factors.c
@@ -69,14 +69,17 @@ static unsigned long clk_factors_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long clk_factors_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_factors_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct clk_factors *factors = to_clk_factors(hw);
- factors->get_factors((u32 *)&rate, (u32)*parent_rate,
+ u32 tmp_rate = *rate;
+
+ factors->get_factors(&tmp_rate, (u32)*parent_rate,
NULL, NULL, NULL, NULL);
- return rate;
+ *rate = tmp_rate;
+ return 0;
}
static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
@@ -100,7 +103,8 @@ static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
else
parent_rate = __clk_get_rate(parent);
- child_rate = clk_factors_round_rate(hw, rate, &parent_rate);
+ child_rate = rate;
+ clk_factors_round_rate(hw, &child_rate, &parent_rate);
if (child_rate <= rate && child_rate > best_child_rate) {
best_parent = parent;
diff --git a/drivers/clk/tegra/clk-audio-sync.c b/drivers/clk/tegra/clk-audio-sync.c
index c0f7843..0224256 100644
--- a/drivers/clk/tegra/clk-audio-sync.c
+++ b/drivers/clk/tegra/clk-audio-sync.c
@@ -28,15 +28,15 @@ static unsigned long clk_sync_source_recalc_rate(struct clk_hw *hw,
return sync->rate;
}
-static long clk_sync_source_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_sync_source_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct tegra_clk_sync_source *sync = to_clk_sync_source(hw);
- if (rate > sync->max_rate)
+ if (*rate > sync->max_rate)
return -EINVAL;
else
- return rate;
+ return 0;
}
static int clk_sync_source_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/tegra/clk-divider.c b/drivers/clk/tegra/clk-divider.c
index 59a5714..9e5ca82 100644
--- a/drivers/clk/tegra/clk-divider.c
+++ b/drivers/clk/tegra/clk-divider.c
@@ -85,23 +85,28 @@ static unsigned long clk_frac_div_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long clk_frac_div_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_frac_div_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_frac_div *divider = to_clk_frac_div(hw);
int div, mul;
unsigned long output_rate = *prate;
- if (!rate)
- return output_rate;
+ if (!*rate) {
+ *rate = output_rate;
+ return 0;
+ }
- div = get_div(divider, rate, output_rate);
- if (div < 0)
- return *prate;
+ div = get_div(divider, *rate, output_rate);
+ if (div < 0) {
+ *rate = *prate;
+ return 0;
+ }
mul = get_mul(divider);
- return DIV_ROUND_UP(output_rate * mul, div + mul);
+ *rate = DIV_ROUND_UP(output_rate * mul, div + mul);
+ return 0;
}
static int clk_frac_div_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/tegra/clk-periph.c b/drivers/clk/tegra/clk-periph.c
index d84ae49..5a262f5 100644
--- a/drivers/clk/tegra/clk-periph.c
+++ b/drivers/clk/tegra/clk-periph.c
@@ -56,8 +56,8 @@ static unsigned long clk_periph_recalc_rate(struct clk_hw *hw,
return div_ops->recalc_rate(div_hw, parent_rate);
}
-static long clk_periph_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_periph_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct tegra_clk_periph *periph = to_clk_periph(hw);
const struct clk_ops *div_ops = periph->div_ops;
diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c
index bfef9ab..a73bdb3 100644
--- a/drivers/clk/tegra/clk-pll.c
+++ b/drivers/clk/tegra/clk-pll.c
@@ -623,24 +623,29 @@ static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
return ret;
}
-static long clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
struct tegra_clk_pll_freq_table cfg;
- if (pll->params->flags & TEGRA_PLL_FIXED)
- return pll->params->fixed_rate;
+ if (pll->params->flags & TEGRA_PLL_FIXED) {
+ *rate = pll->params->fixed_rate;
+ return 0;
+ }
/* PLLM is used for memory; we do not change rate */
- if (pll->params->flags & TEGRA_PLLM)
- return __clk_get_rate(hw->clk);
+ if (pll->params->flags & TEGRA_PLLM) {
+ *rate = __clk_get_rate(hw->clk);
+ return 0;
+ }
- if (_get_table_rate(hw, &cfg, rate, *prate) &&
- _calc_rate(hw, &cfg, rate, *prate))
+ if (_get_table_rate(hw, &cfg, *rate, *prate) &&
+ _calc_rate(hw, &cfg, *rate, *prate))
return -EINVAL;
- return cfg.output_rate;
+ *rate = cfg.output_rate;
+ return 0;
}
static unsigned long clk_pll_recalc_rate(struct clk_hw *hw,
@@ -1001,25 +1006,28 @@ static int clk_pllxc_set_rate(struct clk_hw *hw, unsigned long rate,
return ret;
}
-static long clk_pll_ramp_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pll_ramp_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_pll_freq_table cfg;
int ret = 0, p_div;
u64 output_rate = *prate;
- ret = _pll_ramp_calc_pll(hw, &cfg, rate, *prate);
+ ret = _pll_ramp_calc_pll(hw, &cfg, *rate, *prate);
if (ret < 0)
return ret;
p_div = _hw_to_p_div(hw, cfg.p);
- if (p_div < 0)
- return p_div;
+ if (p_div < 0) {
+ *rate = p_div;
+ return 0;
+ }
output_rate *= cfg.n;
do_div(output_rate, cfg.m * p_div);
- return output_rate;
+ *rate = output_rate;
+ return 0;
}
static int clk_pllm_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -1272,12 +1280,13 @@ static unsigned long clk_pllre_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long clk_pllre_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pllre_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
- return _pllre_calc_rate(pll, NULL, rate, *prate);
+ *rate = _pllre_calc_rate(pll, NULL, *rate, *prate);
+ return 0;
}
static int clk_plle_tegra114_enable(struct clk_hw *hw)
diff --git a/drivers/clk/ti/clk-dra7-atl.c b/drivers/clk/ti/clk-dra7-atl.c
index 59bb4b3..cdf1d17 100644
--- a/drivers/clk/ti/clk-dra7-atl.c
+++ b/drivers/clk/ti/clk-dra7-atl.c
@@ -124,16 +124,17 @@ static unsigned long atl_clk_recalc_rate(struct clk_hw *hw,
return parent_rate / cdesc->divider;
}
-static long atl_clk_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int atl_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned divider;
- divider = (*parent_rate + rate / 2) / rate;
+ divider = (*parent_rate + *rate / 2) / *rate;
if (divider > DRA7_ATL_DIVIDER_MASK + 1)
divider = DRA7_ATL_DIVIDER_MASK + 1;
- return *parent_rate / divider;
+ *rate = *parent_rate / divider;
+ return 0;
}
static int atl_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/ti/composite.c b/drivers/clk/ti/composite.c
index 3654f61..eddad41 100644
--- a/drivers/clk/ti/composite.c
+++ b/drivers/clk/ti/composite.c
@@ -36,8 +36,8 @@ static unsigned long ti_composite_recalc_rate(struct clk_hw *hw,
return ti_clk_divider_ops.recalc_rate(hw, parent_rate);
}
-static long ti_composite_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int ti_composite_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
return -EINVAL;
}
diff --git a/drivers/clk/ti/divider.c b/drivers/clk/ti/divider.c
index ff5f117..6044251 100644
--- a/drivers/clk/ti/divider.c
+++ b/drivers/clk/ti/divider.c
@@ -200,13 +200,14 @@ static int ti_clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
return bestdiv;
}
-static long ti_clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int ti_clk_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
int div;
- div = ti_clk_divider_bestdiv(hw, rate, prate);
+ div = ti_clk_divider_bestdiv(hw, *rate, prate);
- return DIV_ROUND_UP(*prate, div);
+ *rate = DIV_ROUND_UP(*prate, div);
+ return 0;
}
static int ti_clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/ux500/clk-prcmu.c b/drivers/clk/ux500/clk-prcmu.c
index bf63c96..1e1aa2d 100644
--- a/drivers/clk/ux500/clk-prcmu.c
+++ b/drivers/clk/ux500/clk-prcmu.c
@@ -80,11 +80,18 @@ static unsigned long clk_prcmu_recalc_rate(struct clk_hw *hw,
return prcmu_clock_rate(clk->cg_sel);
}
-static long clk_prcmu_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_prcmu_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
- return prcmu_round_clock_rate(clk->cg_sel, rate);
+ long ret;
+
+ ret = prcmu_round_clock_rate(clk->cg_sel, *rate);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
}
static int clk_prcmu_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/versatile/clk-icst.c b/drivers/clk/versatile/clk-icst.c
index bc96f10..6404e61 100644
--- a/drivers/clk/versatile/clk-icst.c
+++ b/drivers/clk/versatile/clk-icst.c
@@ -91,14 +91,15 @@ static unsigned long icst_recalc_rate(struct clk_hw *hw,
return icst->rate;
}
-static long icst_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int icst_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_icst *icst = to_icst(hw);
struct icst_vco vco;
- vco = icst_hz_to_vco(icst->params, rate);
- return icst_hz(icst->params, vco);
+ vco = icst_hz_to_vco(icst->params, *rate);
+ *rate = icst_hz(icst->params, vco);
+ return 0;
}
static int icst_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/versatile/clk-vexpress-osc.c b/drivers/clk/versatile/clk-vexpress-osc.c
index 765f1e0..b507758 100644
--- a/drivers/clk/versatile/clk-vexpress-osc.c
+++ b/drivers/clk/versatile/clk-vexpress-osc.c
@@ -39,18 +39,18 @@ static unsigned long vexpress_osc_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long vexpress_osc_round_rate(struct clk_hw *hw, unsigned long rate,
+static int vexpress_osc_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
struct vexpress_osc *osc = to_vexpress_osc(hw);
- if (WARN_ON(osc->rate_min && rate < osc->rate_min))
- rate = osc->rate_min;
+ if (WARN_ON(osc->rate_min && *rate < osc->rate_min))
+ *rate = osc->rate_min;
- if (WARN_ON(osc->rate_max && rate > osc->rate_max))
- rate = osc->rate_max;
+ if (WARN_ON(osc->rate_max && *rate > osc->rate_max))
+ *rate = osc->rate_max;
- return rate;
+ return 0;
}
static int vexpress_osc_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/zynq/pll.c b/drivers/clk/zynq/pll.c
index 00d72fb..b62d298 100644
--- a/drivers/clk/zynq/pll.c
+++ b/drivers/clk/zynq/pll.c
@@ -60,18 +60,19 @@ struct zynq_pll {
* @prate: Clock frequency of parent clock
* Returns frequency closest to @rate the hardware can generate.
*/
-static long zynq_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int zynq_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
u32 fbdiv;
- fbdiv = DIV_ROUND_CLOSEST(rate, *prate);
+ fbdiv = DIV_ROUND_CLOSEST(*rate, *prate);
if (fbdiv < PLL_FBDIV_MIN)
fbdiv = PLL_FBDIV_MIN;
else if (fbdiv > PLL_FBDIV_MAX)
fbdiv = PLL_FBDIV_MAX;
- return *prate * fbdiv;
+ *rate = *prate * fbdiv;
+ return 0;
}
/**
diff --git a/drivers/gpu/drm/imx/imx-tve.c b/drivers/gpu/drm/imx/imx-tve.c
index 4216e47..0695428 100644
--- a/drivers/gpu/drm/imx/imx-tve.c
+++ b/drivers/gpu/drm/imx/imx-tve.c
@@ -423,17 +423,20 @@ static unsigned long clk_tve_di_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_tve_di_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long div;
- div = *prate / rate;
+ div = *prate / *rate;
if (div >= 4)
- return *prate / 4;
+ *rate = *prate / 4;
else if (div >= 2)
- return *prate / 2;
- return *prate;
+ *rate = *prate / 2;
+ else
+ *rate = *prate;
+
+ return 0;
}
static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c
index eeed006..97cdcb4 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c
@@ -336,11 +336,12 @@ static unsigned long hdmi_pll_recalc_rate(struct clk_hw *hw,
return phy_8960->pixclk;
}
-static long hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int hdmi_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- const struct pll_rate *pll_rate = find_rate(rate);
- return pll_rate->rate;
+ const struct pll_rate *pll_rate = find_rate(*rate);
+ *rate = pll_rate->rate;
+ return 0;
}
static int hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c
index ce42459..c89b109 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c
@@ -109,11 +109,12 @@ static unsigned long mpd4_lvds_pll_recalc_rate(struct clk_hw *hw,
return lvds_pll->pixclk;
}
-static long mpd4_lvds_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int mpd4_lvds_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- const struct pll_rate *pll_rate = find_rate(rate);
- return pll_rate->rate;
+ const struct pll_rate *pll_rate = find_rate(*rate);
+ *rate = pll_rate->rate;
+ return 0;
}
static int mpd4_lvds_pll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c
index deca809..4d5ba85 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -231,11 +231,11 @@ static u32 isp_xclk_calc_divider(unsigned long *rate, unsigned long parent_rate)
return divider;
}
-static long isp_xclk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int isp_xclk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- isp_xclk_calc_divider(&rate, *parent_rate);
- return rate;
+ isp_xclk_calc_divider(rate, *parent_rate);
+ return 0;
}
static int isp_xclk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
index b936bb4..5e6f5a5 100644
--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -316,15 +316,19 @@ static unsigned long hym8563_clkout_recalc_rate(struct clk_hw *hw,
return clkout_rates[ret];
}
-static long hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
int i;
- for (i = 0; i < ARRAY_SIZE(clkout_rates); i++)
- if (clkout_rates[i] <= rate)
- return clkout_rates[i];
+ for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) {
+ if (clkout_rates[i] <= *rate) {
+ *rate = clkout_rates[i];
+ return 0;
+ }
+ }
+ *rate = 0;
return 0;
}
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 5591ea7..1213b0b 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -173,8 +173,8 @@ struct clk_ops {
void (*disable_unused)(struct clk_hw *hw);
unsigned long (*recalc_rate)(struct clk_hw *hw,
unsigned long parent_rate);
- long (*round_rate)(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate);
+ int (*round_rate)(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate);
long (*determine_rate)(struct clk_hw *hw,
unsigned long rate,
unsigned long min_rate,
@@ -365,7 +365,7 @@ extern const struct clk_ops clk_divider_ops;
unsigned long divider_recalc_rate(struct clk_hw *hw, unsigned long parent_rate,
unsigned int val, const struct clk_div_table *table,
unsigned long flags);
-long divider_round_rate(struct clk_hw *hw, unsigned long rate,
+int divider_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate, const struct clk_div_table *table,
u8 width, unsigned long flags);
int divider_get_val(unsigned long rate, unsigned long parent_rate,
diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h
index 6784400..3b2406c 100644
--- a/include/linux/clk/ti.h
+++ b/include/linux/clk/ti.h
@@ -277,9 +277,9 @@ long omap3_noncore_dpll_determine_rate(struct clk_hw *hw,
struct clk_hw **best_parent_clk);
unsigned long omap4_dpll_regm4xen_recalc(struct clk_hw *hw,
unsigned long parent_rate);
-long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
- unsigned long target_rate,
- unsigned long *parent_rate);
+int omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
+ unsigned long *target_rate,
+ unsigned long *parent_rate);
long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw,
unsigned long rate,
unsigned long min_rate,
@@ -288,14 +288,14 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw,
struct clk_hw **best_parent_clk);
u8 omap2_init_dpll_parent(struct clk_hw *hw);
unsigned long omap3_dpll_recalc(struct clk_hw *hw, unsigned long parent_rate);
-long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
- unsigned long *parent_rate);
+int omap2_dpll_round_rate(struct clk_hw *hw, unsigned long *target_rate,
+ unsigned long *parent_rate);
void omap2_init_clk_clkdm(struct clk_hw *clk);
unsigned long omap3_clkoutx2_recalc(struct clk_hw *hw,
unsigned long parent_rate);
int omap3_clkoutx2_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate);
-long omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long rate,
+int omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate);
int omap2_clkops_enable_clkdm(struct clk_hw *hw);
void omap2_clkops_disable_clkdm(struct clk_hw *hw);
--
1.9.1
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [rtc-linux] [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
@ 2015-04-17 7:29 ` Boris Brezillon
0 siblings, 0 replies; 18+ messages in thread
From: Boris Brezillon @ 2015-04-17 7:29 UTC (permalink / raw)
To: Mike Turquette
Cc: Mikko Perttunen, Boris Brezillon, Jonathan Corbet, Shawn Guo,
ascha Hauer, David Brown, Daniel Walker, Bryan Huntsman,
Tony Lindgren, Paul Walmsley, Liviu Dudau, Sudeep Holla,
Lorenzo Pieralisi, Ralf Baechle, Max Filippov, Heiko Stuebner,
Sylwester Nawrocki, Tomasz Figa, Barry Song, Viresh Kumar,
Emilio López, Maxime Ripard, Peter De Schrijver,
Prashant Gaikwad, Stephen Warren, Thierry Reding,
Alexandre Courbot, Tero Kristo, Ulf Hansson, Michal Simek,
Philipp Zabel, linux-doc, linux-kernel, linux-arm-kernel,
linux-arm-msm, linux-omap, linux-mips, patches, linux-rockchip,
linux-samsung-soc, spear-devel, linux-tegra, dri-devel,
linux-media, rtc-linux
Clock rates are stored in an unsigned long field, but ->round_rate()
(which returns a rounded rate from a requested one) returns a long
value (errors are reported using negative error codes), which can lead
to long overflow if the clock rate exceed 2Ghz.
Change ->round_rate() prototype to return 0 or an error code, and pass the
requested rate as a pointer so that it can be adjusted depending on
hardware capabilities.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
CC: Jonathan Corbet <corbet@lwn.net>
CC: Shawn Guo <shawn.guo@linaro.org>
CC: ascha Hauer <kernel@pengutronix.de>
CC: David Brown <davidb@codeaurora.org>
CC: Daniel Walker <dwalker@fifo99.com>
CC: Bryan Huntsman <bryanh@codeaurora.org>
CC: Tony Lindgren <tony@atomide.com>
CC: Paul Walmsley <paul@pwsan.com>
CC: Liviu Dudau <liviu.dudau@arm.com>
CC: Sudeep Holla <sudeep.holla@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: Max Filippov <jcmvbkbc@gmail.com>
CC: Heiko Stuebner <heiko@sntech.de>
CC: Sylwester Nawrocki <s.nawrocki@samsung.com>=20
CC: Tomasz Figa <tomasz.figa@gmail.com>
CC: Barry Song <baohua@kernel.org>
CC: Viresh Kumar <viresh.linux@gmail.com>
CC: "Emilio L=C3=B3pez" <emilio@elopez.com.ar>
CC: Maxime Ripard <maxime.ripard@free-electrons.com>
CC: Peter De Schrijver <pdeschrijver@nvidia.com>
CC: Prashant Gaikwad <pgaikwad@nvidia.com>
CC: Stephen Warren <swarren@wwwdotorg.org>
CC: Thierry Reding <thierry.reding@gmail.com>
CC: Alexandre Courbot <gnurou@gmail.com>
CC: Tero Kristo <t-kristo@ti.com>
CC: Ulf Hansson <ulf.hansson@linaro.org>
CC: Michal Simek <michal.simek@xilinx.com>
CC: Philipp Zabel <p.zabel@pengutronix.de>
CC: linux-doc@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-arm-msm@vger.kernel.org
CC: linux-omap@vger.kernel.org
CC: linux-mips@linux-mips.org
CC: patches@opensource.wolfsonmicro.com
CC: linux-rockchip@lists.infradead.org
CC: linux-samsung-soc@vger.kernel.org
CC: spear-devel@list.st.com
CC: linux-tegra@vger.kernel.org
CC: dri-devel@lists.freedesktop.org
CC: linux-media@vger.kernel.org
CC: rtc-linux@googlegroups.com
Documentation/clk.txt | 4 +-
arch/arm/mach-imx/clk-busy.c | 2 +-
arch/arm/mach-imx/clk-cpu.c | 12 +++-
arch/arm/mach-imx/clk-fixup-div.c | 2 +-
arch/arm/mach-imx/clk-pfd.c | 11 ++--
arch/arm/mach-imx/clk-pllv2.c | 8 ++-
arch/arm/mach-imx/clk-pllv3.c | 46 +++++++------
arch/arm/mach-msm/clock-pcom.c | 4 +-
arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c | 13 ++--
arch/arm/mach-omap2/clkt_clksel.c | 6 +-
arch/arm/mach-omap2/clkt_dpll.c | 21 +++---
arch/arm/mach-omap2/clock.h | 4 +-
arch/arm/mach-omap2/dpll3xxx.c | 27 +++++---
arch/arm/mach-omap2/dpll44xx.c | 26 +++++---
arch/arm/mach-vexpress/spc.c | 11 +++-
arch/mips/alchemy/common/clock.c | 13 ++--
drivers/clk/at91/clk-h32mx.c | 24 ++++---
drivers/clk/at91/clk-peripheral.c | 31 +++++----
drivers/clk/at91/clk-pll.c | 14 ++--
drivers/clk/at91/clk-plldiv.c | 22 ++++---
drivers/clk/at91/clk-smd.c | 24 ++++---
drivers/clk/at91/clk-usb.c | 34 ++++++----
drivers/clk/clk-axi-clkgen.c | 5 +-
drivers/clk/clk-cdce706.c | 46 ++++++-------
drivers/clk/clk-composite.c | 23 ++++---
drivers/clk/clk-divider.c | 16 +++--
drivers/clk/clk-fixed-factor.c | 7 +-
drivers/clk/clk-fractional-divider.c | 16 +++--
drivers/clk/clk-highbank.c | 18 +++---
drivers/clk/clk-si5351.c | 96 ++++++++++++++----------=
----
drivers/clk/clk-si570.c | 14 ++--
drivers/clk/clk-u300.c | 65 ++++++++++---------
drivers/clk/clk-vt8500.c | 27 ++++----
drivers/clk/clk-wm831x.c | 11 ++--
drivers/clk/clk-xgene.c | 11 ++--
drivers/clk/clk.c | 15 +++--
drivers/clk/mmp/clk-frac.c | 14 ++--
drivers/clk/mvebu/clk-corediv.c | 7 +-
drivers/clk/mvebu/clk-cpu.c | 9 +--
drivers/clk/mxs/clk-div.c | 4 +-
drivers/clk/mxs/clk-frac.c | 11 ++--
drivers/clk/mxs/clk-ref.c | 11 ++--
drivers/clk/qcom/clk-regmap-divider.c | 4 +-
drivers/clk/rockchip/clk-pll.c | 13 ++--
drivers/clk/samsung/clk-pll.c | 13 ++--
drivers/clk/shmobile/clk-div6.c | 7 +-
drivers/clk/shmobile/clk-rcar-gen2.c | 9 +--
drivers/clk/sirf/clk-common.c | 18 +++---
drivers/clk/spear/clk-aux-synth.c | 10 ++-
drivers/clk/spear/clk-frac-synth.c | 10 ++-
drivers/clk/spear/clk-gpt-synth.c | 10 ++-
drivers/clk/spear/clk-vco-pll.c | 20 ++++--
drivers/clk/st/clk-flexgen.c | 11 ++--
drivers/clk/st/clkgen-fsyn.c | 21 +++---
drivers/clk/st/clkgen-mux.c | 2 +-
drivers/clk/sunxi/clk-factors.c | 14 ++--
drivers/clk/tegra/clk-audio-sync.c | 8 +--
drivers/clk/tegra/clk-divider.c | 19 ++++--
drivers/clk/tegra/clk-periph.c | 4 +-
drivers/clk/tegra/clk-pll.c | 39 ++++++-----
drivers/clk/ti/clk-dra7-atl.c | 9 +--
drivers/clk/ti/composite.c | 4 +-
drivers/clk/ti/divider.c | 9 +--
drivers/clk/ux500/clk-prcmu.c | 13 +++-
drivers/clk/versatile/clk-icst.c | 9 +--
drivers/clk/versatile/clk-vexpress-osc.c | 12 ++--
drivers/clk/zynq/pll.c | 7 +-
drivers/gpu/drm/imx/imx-tve.c | 15 +++--
drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c | 7 +-
drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c | 7 +-
drivers/media/platform/omap3isp/isp.c | 6 +-
drivers/rtc/rtc-hym8563.c | 14 ++--
include/linux/clk-provider.h | 6 +-
include/linux/clk/ti.h | 12 ++--
74 files changed, 672 insertions(+), 475 deletions(-)
diff --git a/Documentation/clk.txt b/Documentation/clk.txt
index 0e4f90a..fca8b7a 100644
--- a/Documentation/clk.txt
+++ b/Documentation/clk.txt
@@ -68,8 +68,8 @@ the operations defined in clk.h:
int (*is_enabled)(struct clk_hw *hw);
unsigned long (*recalc_rate)(struct clk_hw *hw,
unsigned long parent_rate);
- long (*round_rate)(struct clk_hw *hw,
- unsigned long rate,
+ int (*round_rate)(struct clk_hw *hw,
+ unsigned long *rate,
unsigned long *parent_rate);
long (*determine_rate)(struct clk_hw *hw,
unsigned long rate,
diff --git a/arch/arm/mach-imx/clk-busy.c b/arch/arm/mach-imx/clk-busy.c
index 4bb1bc4..f8c67e9 100644
--- a/arch/arm/mach-imx/clk-busy.c
+++ b/arch/arm/mach-imx/clk-busy.c
@@ -51,7 +51,7 @@ static unsigned long clk_busy_divider_recalc_rate(struct =
clk_hw *hw,
return busy->div_ops->recalc_rate(&busy->div.hw, parent_rate);
}
=20
-static long clk_busy_divider_round_rate(struct clk_hw *hw, unsigned long r=
ate,
+static int clk_busy_divider_round_rate(struct clk_hw *hw, unsigned long *r=
ate,
unsigned long *prate)
{
struct clk_busy_divider *busy =3D to_clk_busy_divider(hw);
diff --git a/arch/arm/mach-imx/clk-cpu.c b/arch/arm/mach-imx/clk-cpu.c
index aa1c345..f6af2d8 100644
--- a/arch/arm/mach-imx/clk-cpu.c
+++ b/arch/arm/mach-imx/clk-cpu.c
@@ -34,12 +34,18 @@ static unsigned long clk_cpu_recalc_rate(struct clk_hw =
*hw,
return clk_get_rate(cpu->div);
}
=20
-static long clk_cpu_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_cpu_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_cpu *cpu =3D to_clk_cpu(hw);
+ long ret;
=20
- return clk_round_rate(cpu->pll, rate);
+ ret =3D clk_round_rate(cpu->pll, *rate);
+ if (ret < 0)
+ return ret;
+
+ *rate =3D ret;
+ return 0;
}
=20
static int clk_cpu_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/arm/mach-imx/clk-fixup-div.c b/arch/arm/mach-imx/clk-fixu=
p-div.c
index 21db020..c2f4f00 100644
--- a/arch/arm/mach-imx/clk-fixup-div.c
+++ b/arch/arm/mach-imx/clk-fixup-div.c
@@ -48,7 +48,7 @@ static unsigned long clk_fixup_div_recalc_rate(struct clk=
_hw *hw,
return fixup_div->ops->recalc_rate(&fixup_div->divider.hw, parent_rate);
}
=20
-static long clk_fixup_div_round_rate(struct clk_hw *hw, unsigned long rate=
,
+static int clk_fixup_div_round_rate(struct clk_hw *hw, unsigned long *rate=
,
unsigned long *prate)
{
struct clk_fixup_div *fixup_div =3D to_clk_fixup_div(hw);
diff --git a/arch/arm/mach-imx/clk-pfd.c b/arch/arm/mach-imx/clk-pfd.c
index 0b0f6f6..449fb7a 100644
--- a/arch/arm/mach-imx/clk-pfd.c
+++ b/arch/arm/mach-imx/clk-pfd.c
@@ -68,14 +68,14 @@ static unsigned long clk_pfd_recalc_rate(struct clk_hw =
*hw,
return tmp;
}
=20
-static long clk_pfd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_pfd_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
u64 tmp =3D *prate;
u8 frac;
=20
- tmp =3D tmp * 18 + rate / 2;
- do_div(tmp, rate);
+ tmp =3D tmp * 18 + *rate / 2;
+ do_div(tmp, *rate);
frac =3D tmp;
if (frac < 12)
frac =3D 12;
@@ -85,7 +85,8 @@ static long clk_pfd_round_rate(struct clk_hw *hw, unsigne=
d long rate,
tmp *=3D 18;
do_div(tmp, frac);
=20
- return tmp;
+ *rate =3D tmp;
+ return 0;
}
=20
static int clk_pfd_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/arm/mach-imx/clk-pllv2.c b/arch/arm/mach-imx/clk-pllv2.c
index 20889d5..6b48bf5 100644
--- a/arch/arm/mach-imx/clk-pllv2.c
+++ b/arch/arm/mach-imx/clk-pllv2.c
@@ -180,14 +180,16 @@ static int clk_pllv2_set_rate(struct clk_hw *hw, unsi=
gned long rate,
return 0;
}
=20
-static long clk_pllv2_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pllv2_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
u32 dp_op, dp_mfd, dp_mfn;
=20
- __clk_pllv2_set_rate(rate, *prate, &dp_op, &dp_mfd, &dp_mfn);
- return __clk_pllv2_recalc_rate(*prate, MXC_PLL_DP_CTL_DPDCK0_2_EN,
+ __clk_pllv2_set_rate(*rate, *prate, &dp_op, &dp_mfd, &dp_mfn);
+ *rate =3D __clk_pllv2_recalc_rate(*prate, MXC_PLL_DP_CTL_DPDCK0_2_EN,
dp_op, dp_mfd, dp_mfn);
+
+ return 0;
}
=20
static int clk_pllv2_prepare(struct clk_hw *hw)
diff --git a/arch/arm/mach-imx/clk-pllv3.c b/arch/arm/mach-imx/clk-pllv3.c
index 641ebc5..4d8f4eb 100644
--- a/arch/arm/mach-imx/clk-pllv3.c
+++ b/arch/arm/mach-imx/clk-pllv3.c
@@ -104,13 +104,15 @@ static unsigned long clk_pllv3_recalc_rate(struct clk=
_hw *hw,
return (div =3D=3D 1) ? parent_rate * 22 : parent_rate * 20;
}
=20
-static long clk_pllv3_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_pllv3_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long parent_rate =3D *prate;
=20
- return (rate >=3D parent_rate * 22) ? parent_rate * 22 :
- parent_rate * 20;
+ *rate =3D (*rate >=3D parent_rate * 22) ? parent_rate * 22 :
+ parent_rate * 20;
+
+ return 0;
}
=20
static int clk_pllv3_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -151,21 +153,23 @@ static unsigned long clk_pllv3_sys_recalc_rate(struct=
clk_hw *hw,
return parent_rate * div / 2;
}
=20
-static long clk_pllv3_sys_round_rate(struct clk_hw *hw, unsigned long rate=
,
- unsigned long *prate)
+static int clk_pllv3_sys_round_rate(struct clk_hw *hw, unsigned long *rate=
,
+ unsigned long *prate)
{
unsigned long parent_rate =3D *prate;
unsigned long min_rate =3D parent_rate * 54 / 2;
unsigned long max_rate =3D parent_rate * 108 / 2;
u32 div;
=20
- if (rate > max_rate)
- rate =3D max_rate;
- else if (rate < min_rate)
- rate =3D min_rate;
- div =3D rate * 2 / parent_rate;
+ if (*rate > max_rate)
+ *rate =3D max_rate;
+ else if (*rate < min_rate)
+ *rate =3D min_rate;
+ div =3D *rate * 2 / parent_rate;
=20
- return parent_rate * div / 2;
+ *rate =3D parent_rate * div / 2;
+
+ return 0;
}
=20
static int clk_pllv3_sys_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -207,7 +211,7 @@ static unsigned long clk_pllv3_av_recalc_rate(struct cl=
k_hw *hw,
return (parent_rate * div) + ((parent_rate / mfd) * mfn);
}
=20
-static long clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
unsigned long parent_rate =3D *prate;
@@ -217,18 +221,20 @@ static long clk_pllv3_av_round_rate(struct clk_hw *hw=
, unsigned long rate,
u32 mfn, mfd =3D 1000000;
s64 temp64;
=20
- if (rate > max_rate)
- rate =3D max_rate;
- else if (rate < min_rate)
- rate =3D min_rate;
+ if (*rate > max_rate)
+ *rate =3D max_rate;
+ else if (*rate < min_rate)
+ *rate =3D min_rate;
=20
- div =3D rate / parent_rate;
- temp64 =3D (u64) (rate - div * parent_rate);
+ div =3D *rate / parent_rate;
+ temp64 =3D (u64) (*rate - div * parent_rate);
temp64 *=3D mfd;
do_div(temp64, parent_rate);
mfn =3D temp64;
=20
- return parent_rate * div + parent_rate / mfd * mfn;
+ *rate =3D parent_rate * div + parent_rate / mfd * mfn;
+
+ return 0;
}
=20
static int clk_pllv3_av_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/arm/mach-msm/clock-pcom.c b/arch/arm/mach-msm/clock-pcom.=
c
index f5b69d7..118c288 100644
--- a/arch/arm/mach-msm/clock-pcom.c
+++ b/arch/arm/mach-msm/clock-pcom.c
@@ -109,11 +109,11 @@ static int pc_clk_is_enabled(struct clk_hw *hw)
return id;
}
=20
-static long pc_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int pc_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *p_rate)
{
/* Not really supported; pc_clk_set_rate() does rounding on it's own. */
- return rate;
+ return 0;
}
=20
static struct clk_ops clk_ops_pcom =3D {
diff --git a/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c b/arch/arm/mach-o=
map2/clkt2xxx_virt_prcm_set.c
index 85e0b0c0..2829a6f 100644
--- a/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
+++ b/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
@@ -71,8 +71,8 @@ unsigned long omap2_table_mpu_recalc(struct clk_hw *clk,
* Some might argue L3-DDR, others ARM, others IVA. This code is simple an=
d
* just uses the ARM rates.
*/
-long omap2_round_to_table_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+int omap2_round_to_table_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
const struct prcm_config *ptr;
long highest_rate;
@@ -88,10 +88,15 @@ long omap2_round_to_table_rate(struct clk_hw *hw, unsig=
ned long rate,
highest_rate =3D ptr->mpu_speed;
=20
/* Can check only after xtal frequency check */
- if (ptr->mpu_speed <=3D rate)
+ if (ptr->mpu_speed <=3D *rate)
break;
}
- return highest_rate;
+
+ if (highest_rate < 0)
+ return highest_rate;
+
+ *rate =3D highest_rate;
+ return 0;
}
=20
/* Sets basic clocks based on the specified rate */
diff --git a/arch/arm/mach-omap2/clkt_clksel.c b/arch/arm/mach-omap2/clkt_c=
lksel.c
index 7ee2610..b932276 100644
--- a/arch/arm/mach-omap2/clkt_clksel.c
+++ b/arch/arm/mach-omap2/clkt_clksel.c
@@ -385,13 +385,15 @@ unsigned long omap2_clksel_recalc(struct clk_hw *hw, =
unsigned long parent_rate)
*
* Returns the rounded clock rate or returns 0xffffffff on error.
*/
-long omap2_clksel_round_rate(struct clk_hw *hw, unsigned long target_rate,
+int omap2_clksel_round_rate(struct clk_hw *hw, unsigned long *target_rate,
unsigned long *parent_rate)
{
struct clk_hw_omap *clk =3D to_clk_hw_omap(hw);
u32 new_div;
=20
- return omap2_clksel_round_rate_div(clk, target_rate, &new_div);
+ *target_rate =3D omap2_clksel_round_rate_div(clk, *target_rate,
+ &new_div);
+ return 0;
}
=20
/**
diff --git a/arch/arm/mach-omap2/clkt_dpll.c b/arch/arm/mach-omap2/clkt_dpl=
l.c
index f251a14..7dac6b3 100644
--- a/arch/arm/mach-omap2/clkt_dpll.c
+++ b/arch/arm/mach-omap2/clkt_dpll.c
@@ -280,7 +280,7 @@ unsigned long omap2_get_dpll_rate(struct clk_hw_omap *c=
lk)
* (expensive) function again. Returns ~0 if the target rate cannot
* be rounded, or the rounded rate upon success.
*/
-long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
+int omap2_dpll_round_rate(struct clk_hw *hw, unsigned long *target_rate,
unsigned long *parent_rate)
{
struct clk_hw_omap *clk =3D to_clk_hw_omap(hw);
@@ -295,16 +295,16 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigne=
d long target_rate,
const char *clk_name;
=20
if (!clk || !clk->dpll_data)
- return ~0;
+ return -EINVAL;
=20
dd =3D clk->dpll_data;
=20
ref_rate =3D __clk_get_rate(dd->clk_ref);
clk_name =3D __clk_get_name(hw->clk);
pr_debug("clock: %s: starting DPLL round_rate, target rate %lu\n",
- clk_name, target_rate);
+ clk_name, *target_rate);
=20
- scaled_rt_rp =3D target_rate / (ref_rate / DPLL_SCALE_FACTOR);
+ scaled_rt_rp =3D *target_rate / (ref_rate / DPLL_SCALE_FACTOR);
scaled_max_m =3D dd->max_multiplier * DPLL_SCALE_FACTOR;
=20
dd->last_rounded_rate =3D 0;
@@ -330,7 +330,7 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned =
long target_rate,
if (m > scaled_max_m)
break;
=20
- r =3D _dpll_test_mult(&m, n, &new_rate, target_rate,
+ r =3D _dpll_test_mult(&m, n, &new_rate, *target_rate,
ref_rate);
=20
/* m can't be set low enough for this n - try with a larger n */
@@ -338,7 +338,7 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned =
long target_rate,
continue;
=20
/* skip rates above our target rate */
- delta =3D target_rate - new_rate;
+ delta =3D *target_rate - new_rate;
if (delta < 0)
continue;
=20
@@ -357,14 +357,15 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigne=
d long target_rate,
=20
if (prev_min_delta =3D=3D LONG_MAX) {
pr_debug("clock: %s: cannot round to rate %lu\n",
- clk_name, target_rate);
- return ~0;
+ clk_name, *target_rate);
+ return -EINVAL;
}
=20
dd->last_rounded_m =3D min_delta_m;
dd->last_rounded_n =3D min_delta_n;
- dd->last_rounded_rate =3D target_rate - prev_min_delta;
+ dd->last_rounded_rate =3D *target_rate - prev_min_delta;
=20
- return dd->last_rounded_rate;
+ *target_rate =3D dd->last_rounded_rate;
+ return 0;
}
=20
diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h
index a56742f..cfe41b7 100644
--- a/arch/arm/mach-omap2/clock.h
+++ b/arch/arm/mach-omap2/clock.h
@@ -194,8 +194,8 @@ u32 omap2_clksel_round_rate_div(struct clk_hw_omap *clk=
,
u32 *new_div);
u8 omap2_clksel_find_parent_index(struct clk_hw *hw);
unsigned long omap2_clksel_recalc(struct clk_hw *hw, unsigned long parent_=
rate);
-long omap2_clksel_round_rate(struct clk_hw *hw, unsigned long target_rate,
- unsigned long *parent_rate);
+int omap2_clksel_round_rate(struct clk_hw *hw, unsigned long *target_rate,
+ unsigned long *parent_rate);
int omap2_clksel_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate);
int omap2_clksel_set_parent(struct clk_hw *hw, u8 field_val);
diff --git a/arch/arm/mach-omap2/dpll3xxx.c b/arch/arm/mach-omap2/dpll3xxx.=
c
index 44e57ec..7a6fb45 100644
--- a/arch/arm/mach-omap2/dpll3xxx.c
+++ b/arch/arm/mach-omap2/dpll3xxx.c
@@ -480,6 +480,7 @@ long omap3_noncore_dpll_determine_rate(struct clk_hw *h=
w, unsigned long rate,
{
struct clk_hw_omap *clk =3D to_clk_hw_omap(hw);
struct dpll_data *dd;
+ int ret;
=20
if (!hw || !rate)
return -EINVAL;
@@ -492,7 +493,10 @@ long omap3_noncore_dpll_determine_rate(struct clk_hw *=
hw, unsigned long rate,
(dd->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
*best_parent_clk =3D __clk_get_hw(dd->clk_bypass);
} else {
- rate =3D omap2_dpll_round_rate(hw, rate, best_parent_rate);
+ ret =3D omap2_dpll_round_rate(hw, &rate, best_parent_rate);
+ if (ret)
+ return ret;
+
*best_parent_clk =3D __clk_get_hw(dd->clk_ref);
}
=20
@@ -768,27 +772,33 @@ int omap3_clkoutx2_set_rate(struct clk_hw *hw, unsign=
ed long rate,
return 0;
}
=20
-long omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long rate,
+int omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
const struct dpll_data *dd;
u32 v;
struct clk_hw_omap *pclk =3D NULL;
=20
- if (!*prate)
+ if (!*prate) {
+ *rate =3D 0;
return 0;
+ }
=20
pclk =3D omap3_find_clkoutx2_dpll(hw);
=20
- if (!pclk)
+ if (!pclk) {
+ *rate =3D 0;
return 0;
+ }
=20
dd =3D pclk->dpll_data;
=20
/* TYPE J does not have a clkoutx2 */
if (dd->flags & DPLL_J_TYPE) {
- *prate =3D __clk_round_rate(__clk_get_parent(pclk->hw.clk), rate);
- return *prate;
+ *prate =3D __clk_round_rate(__clk_get_parent(pclk->hw.clk),
+ *rate);
+ *rate =3D *prate;
+ return 0;
}
=20
WARN_ON(!dd->enable_mask);
@@ -803,12 +813,13 @@ long omap3_clkoutx2_round_rate(struct clk_hw *hw, uns=
igned long rate,
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
unsigned long best_parent;
=20
- best_parent =3D (rate / 2);
+ best_parent =3D (*rate / 2);
*prate =3D __clk_round_rate(__clk_get_parent(hw->clk),
best_parent);
}
=20
- return *prate * 2;
+ *rate =3D *prate * 2;
+ return 0;
}
=20
/* OMAP3/4 non-CORE DPLL clkops */
diff --git a/arch/arm/mach-omap2/dpll44xx.c b/arch/arm/mach-omap2/dpll44xx.=
c
index f231be0..afd3284 100644
--- a/arch/arm/mach-omap2/dpll44xx.c
+++ b/arch/arm/mach-omap2/dpll44xx.c
@@ -146,11 +146,12 @@ unsigned long omap4_dpll_regm4xen_recalc(struct clk_h=
w *hw,
* M-dividers) upon success, -EINVAL if @clk is null or not a DPLL, or
* ~0 if an error occurred in omap2_dpll_round_rate().
*/
-long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
- unsigned long target_rate,
- unsigned long *parent_rate)
+int omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
+ unsigned long *target_rate,
+ unsigned long *parent_rate)
{
struct clk_hw_omap *clk =3D to_clk_hw_omap(hw);
+ unsigned long rate =3D *target_rate;
struct dpll_data *dd;
long r;
=20
@@ -166,7 +167,7 @@ long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
* target rate without using the 4X multiplier.
*/
r =3D omap2_dpll_round_rate(hw, target_rate, NULL);
- if (r !=3D ~0)
+ if (!r)
goto out;
=20
/*
@@ -174,9 +175,9 @@ long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
* this time see if using the 4X multiplier can help. Enabling the
* 4X multiplier is equivalent to dividing the target rate by 4.
*/
- r =3D omap2_dpll_round_rate(hw, target_rate / OMAP4430_REGM4XEN_MULT,
- NULL);
- if (r =3D=3D ~0)
+ rate =3D *target_rate / OMAP4430_REGM4XEN_MULT;
+ r =3D omap2_dpll_round_rate(hw, &rate, NULL);
+ if (r)
return r;
=20
dd->last_rounded_rate *=3D OMAP4430_REGM4XEN_MULT;
@@ -184,8 +185,9 @@ long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
=20
out:
omap4_dpll_lpmode_recalc(dd);
+ *target_rate =3D dd->last_rounded_rate;
=20
- return dd->last_rounded_rate;
+ return 0;
}
=20
/**
@@ -209,6 +211,7 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw *=
hw, unsigned long rate,
{
struct clk_hw_omap *clk =3D to_clk_hw_omap(hw);
struct dpll_data *dd;
+ int ret;
=20
if (!hw || !rate)
return -EINVAL;
@@ -221,8 +224,11 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw =
*hw, unsigned long rate,
(dd->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
*best_parent_clk =3D __clk_get_hw(dd->clk_bypass);
} else {
- rate =3D omap4_dpll_regm4xen_round_rate(hw, rate,
- best_parent_rate);
+ ret =3D omap4_dpll_regm4xen_round_rate(hw, &rate,
+ best_parent_rate);
+ if (ret)
+ return ret;
+
*best_parent_clk =3D __clk_get_hw(dd->clk_ref);
}
=20
diff --git a/arch/arm/mach-vexpress/spc.c b/arch/arm/mach-vexpress/spc.c
index f61158c..774ac3b 100644
--- a/arch/arm/mach-vexpress/spc.c
+++ b/arch/arm/mach-vexpress/spc.c
@@ -507,12 +507,19 @@ static unsigned long spc_recalc_rate(struct clk_hw *h=
w,
return freq * 1000;
}
=20
-static long spc_round_rate(struct clk_hw *hw, unsigned long drate,
+static int spc_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *parent_rate)
{
struct clk_spc *spc =3D to_clk_spc(hw);
+ long ret;
=20
- return ve_spc_round_performance(spc->cluster, drate);
+ ret =3D ve_spc_round_performance(spc->cluster, *drate);
+ if (ret < 0)
+ return ret;
+
+ *drate =3D ret;
+
+ return 0;
}
=20
static int spc_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/mips/alchemy/common/clock.c b/arch/mips/alchemy/common/cl=
ock.c
index 6a98d2c..d697d8f 100644
--- a/arch/mips/alchemy/common/clock.c
+++ b/arch/mips/alchemy/common/clock.c
@@ -202,24 +202,27 @@ static int alchemy_clk_aux_setr(struct clk_hw *hw,
return 0;
}
=20
-static long alchemy_clk_aux_roundr(struct clk_hw *hw,
- unsigned long rate,
+static int alchemy_clk_aux_roundr(struct clk_hw *hw,
+ unsigned long *rate,
unsigned long *parent_rate)
{
struct alchemy_auxpll_clk *a =3D to_auxpll_clk(hw);
unsigned long mult;
=20
- if (!rate || !*parent_rate)
+ if (!*rate || !*parent_rate) {
+ *rate =3D 0;
return 0;
+ }
=20
- mult =3D rate / (*parent_rate);
+ mult =3D *rate / (*parent_rate);
=20
if (mult && (mult < 7))
mult =3D 7;
if (mult > a->maxmult)
mult =3D a->maxmult;
=20
- return (*parent_rate) * mult;
+ *rate =3D (*parent_rate) * mult;
+ return 0;
}
=20
static struct clk_ops alchemy_clkops_aux =3D {
diff --git a/drivers/clk/at91/clk-h32mx.c b/drivers/clk/at91/clk-h32mx.c
index 152dcb3..e48f31e 100644
--- a/drivers/clk/at91/clk-h32mx.c
+++ b/drivers/clk/at91/clk-h32mx.c
@@ -49,21 +49,25 @@ static unsigned long clk_sama5d4_h32mx_recalc_rate(stru=
ct clk_hw *hw,
return parent_rate;
}
=20
-static long clk_sama5d4_h32mx_round_rate(struct clk_hw *hw, unsigned long =
rate,
- unsigned long *parent_rate)
+static int clk_sama5d4_h32mx_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
=20
- if (rate > *parent_rate)
- return *parent_rate;
- div =3D *parent_rate / 2;
- if (rate < div)
- return div;
+ if (*rate > *parent_rate) {
+ *rate =3D *parent_rate;
+ return 0;
+ }
=20
- if (rate - div < *parent_rate - rate)
- return div;
+ div =3D *parent_rate / 2;
+ if (*rate < div || (*rate - div) < (*parent_rate - *rate)) {
+ *rate =3D div;
+ return 0;
+ }
=20
- return *parent_rate;
+ *rate =3D *parent_rate;
+ return 0;
}
=20
static int clk_sama5d4_h32mx_set_rate(struct clk_hw *hw, unsigned long rat=
e,
diff --git a/drivers/clk/at91/clk-peripheral.c b/drivers/clk/at91/clk-perip=
heral.c
index 597fed4..d990ae0 100644
--- a/drivers/clk/at91/clk-peripheral.c
+++ b/drivers/clk/at91/clk-peripheral.c
@@ -227,9 +227,9 @@ clk_sam9x5_peripheral_recalc_rate(struct clk_hw *hw,
return parent_rate >> periph->div;
}
=20
-static long clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long *parent_rate)
+static int clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
int shift =3D 0;
unsigned long best_rate;
@@ -238,8 +238,10 @@ static long clk_sam9x5_peripheral_round_rate(struct cl=
k_hw *hw,
unsigned long cur_diff;
struct clk_sam9x5_peripheral *periph =3D to_clk_sam9x5_peripheral(hw);
=20
- if (periph->id < PERIPHERAL_ID_MIN || !periph->range.max)
- return *parent_rate;
+ if (periph->id < PERIPHERAL_ID_MIN || !periph->range.max) {
+ *rate =3D *parent_rate;
+ return 0;
+ }
=20
if (periph->range.max) {
for (; shift < PERIPHERAL_MAX_SHIFT; shift++) {
@@ -249,28 +251,31 @@ static long clk_sam9x5_peripheral_round_rate(struct c=
lk_hw *hw,
}
}
=20
- if (rate >=3D cur_rate)
- return cur_rate;
+ if (*rate >=3D cur_rate) {
+ *rate =3D cur_rate;
+ return 0;
+ }
=20
- best_diff =3D cur_rate - rate;
+ best_diff =3D cur_rate - *rate;
best_rate =3D cur_rate;
for (; shift < PERIPHERAL_MAX_SHIFT; shift++) {
cur_rate =3D *parent_rate >> shift;
- if (cur_rate < rate)
- cur_diff =3D rate - cur_rate;
+ if (cur_rate < *rate)
+ cur_diff =3D *rate - cur_rate;
else
- cur_diff =3D cur_rate - rate;
+ cur_diff =3D cur_rate - *rate;
=20
if (cur_diff < best_diff) {
best_diff =3D cur_diff;
best_rate =3D cur_rate;
}
=20
- if (!best_diff || cur_rate < rate)
+ if (!best_diff || cur_rate < *rate)
break;
}
=20
- return best_rate;
+ *rate =3D best_rate;
+ return 0;
}
=20
static int clk_sam9x5_peripheral_set_rate(struct clk_hw *hw,
diff --git a/drivers/clk/at91/clk-pll.c b/drivers/clk/at91/clk-pll.c
index 6ec79db..e7754eb 100644
--- a/drivers/clk/at91/clk-pll.c
+++ b/drivers/clk/at91/clk-pll.c
@@ -260,13 +260,19 @@ static long clk_pll_get_best_div_mul(struct clk_pll *=
pll, unsigned long rate,
return bestrate;
}
=20
-static long clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct clk_pll *pll =3D to_clk_pll(hw);
+ long ret;
=20
- return clk_pll_get_best_div_mul(pll, rate, *parent_rate,
- NULL, NULL, NULL);
+ ret =3D clk_pll_get_best_div_mul(pll, *rate, *parent_rate,
+ NULL, NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ *rate =3D ret;
+ return 0;
}
=20
static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/at91/clk-plldiv.c b/drivers/clk/at91/clk-plldiv.c
index ea22656..c267214 100644
--- a/drivers/clk/at91/clk-plldiv.c
+++ b/drivers/clk/at91/clk-plldiv.c
@@ -36,21 +36,23 @@ static unsigned long clk_plldiv_recalc_rate(struct clk_=
hw *hw,
return parent_rate;
}
=20
-static long clk_plldiv_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_plldiv_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
=20
- if (rate > *parent_rate)
- return *parent_rate;
- div =3D *parent_rate / 2;
- if (rate < div)
- return div;
+ if (*rate > *parent_rate) {
+ *rate =3D *parent_rate;
+ return 0;
+ }
=20
- if (rate - div < *parent_rate - rate)
- return div;
+ div =3D *parent_rate / 2;
+ if (*rate < div || (*rate - div) < (*parent_rate - *rate))
+ *rate =3D div;
+ else
+ *rate =3D *parent_rate;
=20
- return *parent_rate;
+ return 0;
}
=20
static int clk_plldiv_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/at91/clk-smd.c b/drivers/clk/at91/clk-smd.c
index 144d47e..cd0f6d2 100644
--- a/drivers/clk/at91/clk-smd.c
+++ b/drivers/clk/at91/clk-smd.c
@@ -43,26 +43,32 @@ static unsigned long at91sam9x5_clk_smd_recalc_rate(str=
uct clk_hw *hw,
return parent_rate / (smddiv + 1);
}
=20
-static long at91sam9x5_clk_smd_round_rate(struct clk_hw *hw, unsigned long=
rate,
- unsigned long *parent_rate)
+static int at91sam9x5_clk_smd_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
unsigned long bestrate;
unsigned long tmp;
=20
- if (rate >=3D *parent_rate)
- return *parent_rate;
+ if (*rate >=3D *parent_rate) {
+ *rate =3D *parent_rate;
+ return 0;
+ }
=20
- div =3D *parent_rate / rate;
- if (div > SMD_MAX_DIV)
- return *parent_rate / (SMD_MAX_DIV + 1);
+ div =3D *parent_rate / *rate;
+ if (div > SMD_MAX_DIV) {
+ *rate =3D *parent_rate / (SMD_MAX_DIV + 1);
+ return 0;
+ }
=20
bestrate =3D *parent_rate / div;
tmp =3D *parent_rate / (div + 1);
- if (bestrate - rate > rate - tmp)
+ if (bestrate - *rate > *rate - tmp)
bestrate =3D tmp;
=20
- return bestrate;
+ *rate =3D bestrate;
+ return 0;
}
=20
static int at91sam9x5_clk_smd_set_parent(struct clk_hw *hw, u8 index)
diff --git a/drivers/clk/at91/clk-usb.c b/drivers/clk/at91/clk-usb.c
index a23ac0c..02599e6 100644
--- a/drivers/clk/at91/clk-usb.c
+++ b/drivers/clk/at91/clk-usb.c
@@ -56,22 +56,26 @@ static unsigned long at91sam9x5_clk_usb_recalc_rate(str=
uct clk_hw *hw,
return DIV_ROUND_CLOSEST(parent_rate, (usbdiv + 1));
}
=20
-static long at91sam9x5_clk_usb_round_rate(struct clk_hw *hw, unsigned long=
rate,
- unsigned long *parent_rate)
+static int at91sam9x5_clk_usb_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
=20
- if (!rate)
+ if (!*rate)
return -EINVAL;
=20
- if (rate >=3D *parent_rate)
- return *parent_rate;
+ if (*rate >=3D *parent_rate) {
+ *rate =3D *parent_rate;
+ return 0;
+ }
=20
- div =3D DIV_ROUND_CLOSEST(*parent_rate, rate);
+ div =3D DIV_ROUND_CLOSEST(*parent_rate, *rate);
if (div > SAM9X5_USB_MAX_DIV + 1)
div =3D SAM9X5_USB_MAX_DIV + 1;
=20
- return DIV_ROUND_CLOSEST(*parent_rate, div);
+ *rate =3D DIV_ROUND_CLOSEST(*parent_rate, div);
+ return 0;
}
=20
static int at91sam9x5_clk_usb_set_parent(struct clk_hw *hw, u8 index)
@@ -235,8 +239,9 @@ static unsigned long at91rm9200_clk_usb_recalc_rate(str=
uct clk_hw *hw,
return 0;
}
=20
-static long at91rm9200_clk_usb_round_rate(struct clk_hw *hw, unsigned long=
rate,
- unsigned long *parent_rate)
+static int at91rm9200_clk_usb_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
struct at91rm9200_clk_usb *usb =3D to_at91rm9200_clk_usb(hw);
struct clk *parent =3D __clk_get_parent(hw->clk);
@@ -252,13 +257,13 @@ static long at91rm9200_clk_usb_round_rate(struct clk_=
hw *hw, unsigned long rate,
if (!usb->divisors[i])
continue;
=20
- tmp_parent_rate =3D rate * usb->divisors[i];
+ tmp_parent_rate =3D *rate * usb->divisors[i];
tmp_parent_rate =3D __clk_round_rate(parent, tmp_parent_rate);
tmprate =3D DIV_ROUND_CLOSEST(tmp_parent_rate, usb->divisors[i]);
- if (tmprate < rate)
- tmpdiff =3D rate - tmprate;
+ if (tmprate < *rate)
+ tmpdiff =3D *rate - tmprate;
else
- tmpdiff =3D tmprate - rate;
+ tmpdiff =3D tmprate - *rate;
=20
if (bestdiff < 0 || bestdiff > tmpdiff) {
bestrate =3D tmprate;
@@ -270,7 +275,8 @@ static long at91rm9200_clk_usb_round_rate(struct clk_hw=
*hw, unsigned long rate,
break;
}
=20
- return bestrate;
+ *rate =3D bestrate;
+ return 0;
}
=20
static int at91rm9200_clk_usb_set_rate(struct clk_hw *hw, unsigned long ra=
te,
diff --git a/drivers/clk/clk-axi-clkgen.c b/drivers/clk/clk-axi-clkgen.c
index e619285..3509d50 100644
--- a/drivers/clk/clk-axi-clkgen.c
+++ b/drivers/clk/clk-axi-clkgen.c
@@ -405,7 +405,7 @@ static int axi_clkgen_set_rate(struct clk_hw *clk_hw,
return 0;
}
=20
-static long axi_clkgen_round_rate(struct clk_hw *hw, unsigned long rate,
+static int axi_clkgen_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
unsigned int d, m, dout;
@@ -415,7 +415,8 @@ static long axi_clkgen_round_rate(struct clk_hw *hw, un=
signed long rate,
if (d =3D=3D 0 || dout =3D=3D 0 || m =3D=3D 0)
return -EINVAL;
=20
- return *parent_rate / d * m / dout;
+ *rate =3D *parent_rate / d * m / dout;
+ return 0;
}
=20
static unsigned long axi_clkgen_recalc_rate(struct clk_hw *clk_hw,
diff --git a/drivers/clk/clk-cdce706.c b/drivers/clk/clk-cdce706.c
index c386ad2..f110959 100644
--- a/drivers/clk/clk-cdce706.c
+++ b/drivers/clk/clk-cdce706.c
@@ -187,8 +187,8 @@ static unsigned long cdce706_pll_recalc_rate(struct clk=
_hw *hw,
return 0;
}
=20
-static long cdce706_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cdce706_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct cdce706_hw_data *hwd =3D to_hw_data(hw);
unsigned long mul, div;
@@ -196,9 +196,9 @@ static long cdce706_pll_round_rate(struct clk_hw *hw, u=
nsigned long rate,
=20
dev_dbg(&hwd->dev_data->client->dev,
"%s, rate: %lu, parent_rate: %lu\n",
- __func__, rate, *parent_rate);
+ __func__, *rate, *parent_rate);
=20
- rational_best_approximation(rate, *parent_rate,
+ rational_best_approximation(*rate, *parent_rate,
CDCE706_PLL_N_MAX, CDCE706_PLL_M_MAX,
&mul, &div);
hwd->mul =3D mul;
@@ -210,7 +210,8 @@ static long cdce706_pll_round_rate(struct clk_hw *hw, u=
nsigned long rate,
=20
res =3D (u64)*parent_rate * hwd->mul;
do_div(res, hwd->div);
- return res;
+ *rate =3D res;
+ return 0;
}
=20
static int cdce706_pll_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -292,8 +293,8 @@ static unsigned long cdce706_divider_recalc_rate(struct=
clk_hw *hw,
return 0;
}
=20
-static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long ra=
te,
- unsigned long *parent_rate)
+static int cdce706_divider_round_rate(struct clk_hw *hw, unsigned long *ra=
te,
+ unsigned long *parent_rate)
{
struct cdce706_hw_data *hwd =3D to_hw_data(hw);
struct cdce706_dev_data *cdce =3D hwd->dev_data;
@@ -301,31 +302,31 @@ static long cdce706_divider_round_rate(struct clk_hw =
*hw, unsigned long rate,
=20
dev_dbg(&hwd->dev_data->client->dev,
"%s, rate: %lu, parent_rate: %lu\n",
- __func__, rate, *parent_rate);
+ __func__, *rate, *parent_rate);
=20
- rational_best_approximation(rate, *parent_rate,
+ rational_best_approximation(*rate, *parent_rate,
1, CDCE706_DIVIDER_DIVIDER_MAX,
&mul, &div);
if (!mul)
div =3D CDCE706_DIVIDER_DIVIDER_MAX;
=20
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
- unsigned long best_diff =3D rate;
+ unsigned long best_diff =3D *rate;
unsigned long best_div =3D 0;
struct clk *gp_clk =3D cdce->clkin_clk[cdce->clkin[0].parent];
unsigned long gp_rate =3D gp_clk ? clk_get_rate(gp_clk) : 0;
=20
- for (div =3D CDCE706_PLL_FREQ_MIN / rate; best_diff &&
- div <=3D CDCE706_PLL_FREQ_MAX / rate; ++div) {
+ for (div =3D CDCE706_PLL_FREQ_MIN / *rate; best_diff &&
+ div <=3D CDCE706_PLL_FREQ_MAX / *rate; ++div) {
unsigned long n, m;
unsigned long diff;
unsigned long div_rate;
u64 div_rate64;
=20
- if (rate * div < CDCE706_PLL_FREQ_MIN)
+ if (*rate * div < CDCE706_PLL_FREQ_MIN)
continue;
=20
- rational_best_approximation(rate * div, gp_rate,
+ rational_best_approximation(*rate * div, gp_rate,
CDCE706_PLL_N_MAX,
CDCE706_PLL_M_MAX,
&n, &m);
@@ -333,7 +334,7 @@ static long cdce706_divider_round_rate(struct clk_hw *h=
w, unsigned long rate,
do_div(div_rate64, m);
do_div(div_rate64, div);
div_rate =3D div_rate64;
- diff =3D max(div_rate, rate) - min(div_rate, rate);
+ diff =3D max(div_rate, *rate) - min(div_rate, *rate);
=20
if (diff < best_diff) {
best_diff =3D diff;
@@ -348,8 +349,8 @@ static long cdce706_divider_round_rate(struct clk_hw *h=
w, unsigned long rate,
=20
dev_dbg(&hwd->dev_data->client->dev,
"%s, altering parent rate: %lu -> %lu\n",
- __func__, *parent_rate, rate * div);
- *parent_rate =3D rate * div;
+ __func__, *parent_rate, *rate * div);
+ *parent_rate =3D *rate * div;
}
hwd->div =3D div;
=20
@@ -357,7 +358,8 @@ static long cdce706_divider_round_rate(struct clk_hw *h=
w, unsigned long rate,
"%s, divider: %d, div: %lu\n",
__func__, hwd->idx, div);
=20
- return *parent_rate / div;
+ *rate =3D *parent_rate / div;
+ return 0;
}
=20
static int cdce706_divider_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -425,11 +427,11 @@ static unsigned long cdce706_clkout_recalc_rate(struc=
t clk_hw *hw,
return parent_rate;
}
=20
-static long cdce706_clkout_round_rate(struct clk_hw *hw, unsigned long rat=
e,
- unsigned long *parent_rate)
+static int cdce706_clkout_round_rate(struct clk_hw *hw, unsigned long *rat=
e,
+ unsigned long *parent_rate)
{
- *parent_rate =3D rate;
- return rate;
+ *parent_rate =3D *rate;
+ return 0;
}
=20
static int cdce706_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c
index 956b7e5..f56a71d 100644
--- a/drivers/clk/clk-composite.c
+++ b/drivers/clk/clk-composite.c
@@ -68,10 +68,10 @@ static long clk_composite_determine_rate(struct clk_hw =
*hw, unsigned long rate,
struct clk_hw *mux_hw =3D composite->mux_hw;
struct clk *parent;
unsigned long parent_rate;
- long tmp_rate, best_rate =3D 0;
+ unsigned long tmp_rate, best_rate =3D 0;
unsigned long rate_diff;
unsigned long best_rate_diff =3D ULONG_MAX;
- int i;
+ int ret, i;
=20
if (rate_hw && rate_ops && rate_ops->determine_rate) {
__clk_hw_set_clk(rate_hw, hw);
@@ -88,8 +88,12 @@ static long clk_composite_determine_rate(struct clk_hw *=
hw, unsigned long rate,
*best_parent_p =3D __clk_get_hw(parent);
*best_parent_rate =3D __clk_get_rate(parent);
=20
- return rate_ops->round_rate(rate_hw, rate,
- best_parent_rate);
+ ret =3D rate_ops->round_rate(rate_hw, &rate,
+ best_parent_rate);
+ if (ret)
+ return ret;
+
+ return rate;
}
=20
for (i =3D 0; i < __clk_get_num_parents(mux_hw->clk); i++) {
@@ -99,9 +103,10 @@ static long clk_composite_determine_rate(struct clk_hw =
*hw, unsigned long rate,
=20
parent_rate =3D __clk_get_rate(parent);
=20
- tmp_rate =3D rate_ops->round_rate(rate_hw, rate,
- &parent_rate);
- if (tmp_rate < 0)
+ tmp_rate =3D rate;
+ ret =3D rate_ops->round_rate(rate_hw, &tmp_rate,
+ &parent_rate);
+ if (ret < 0)
continue;
=20
rate_diff =3D abs(rate - tmp_rate);
@@ -130,8 +135,8 @@ static long clk_composite_determine_rate(struct clk_hw =
*hw, unsigned long rate,
}
}
=20
-static long clk_composite_round_rate(struct clk_hw *hw, unsigned long rate=
,
- unsigned long *prate)
+static int clk_composite_round_rate(struct clk_hw *hw, unsigned long *rate=
,
+ unsigned long *prate)
{
struct clk_composite *composite =3D to_clk_composite(hw);
const struct clk_ops *rate_ops =3D composite->rate_ops;
diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index 25006a8..f646a0c 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -329,19 +329,20 @@ static int clk_divider_bestdiv(struct clk_hw *hw, uns=
igned long rate,
return bestdiv;
}
=20
-long divider_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate, const struct clk_div_table *table,
- u8 width, unsigned long flags)
+int divider_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate, const struct clk_div_table *table,
+ u8 width, unsigned long flags)
{
int div;
=20
- div =3D clk_divider_bestdiv(hw, rate, prate, table, width, flags);
+ div =3D clk_divider_bestdiv(hw, *rate, prate, table, width, flags);
=20
- return DIV_ROUND_UP(*prate, div);
+ *rate =3D DIV_ROUND_UP(*prate, div);
+ return 0;
}
EXPORT_SYMBOL_GPL(divider_round_rate);
=20
-static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_divider *divider =3D to_clk_divider(hw);
@@ -352,7 +353,8 @@ static long clk_divider_round_rate(struct clk_hw *hw, u=
nsigned long rate,
bestdiv =3D readl(divider->reg) >> divider->shift;
bestdiv &=3D div_mask(divider->width);
bestdiv =3D _get_div(divider->table, bestdiv, divider->flags);
- return DIV_ROUND_UP(*prate, bestdiv);
+ *rate =3D DIV_ROUND_UP(*prate, bestdiv);
+ return 0;
}
=20
return divider_round_rate(hw, rate, prate, divider->table,
diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.=
c
index d9e3f67..ff936d0 100644
--- a/drivers/clk/clk-fixed-factor.c
+++ b/drivers/clk/clk-fixed-factor.c
@@ -36,7 +36,7 @@ static unsigned long clk_factor_recalc_rate(struct clk_hw=
*hw,
return (unsigned long)rate;
}
=20
-static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_factor_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_fixed_factor *fix =3D to_clk_fixed_factor(hw);
@@ -44,12 +44,13 @@ static long clk_factor_round_rate(struct clk_hw *hw, un=
signed long rate,
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
unsigned long best_parent;
=20
- best_parent =3D (rate / fix->mult) * fix->div;
+ best_parent =3D (*rate / fix->mult) * fix->div;
*prate =3D __clk_round_rate(__clk_get_parent(hw->clk),
best_parent);
}
=20
- return (*prate / fix->div) * fix->mult;
+ *rate =3D (*prate / fix->div) * fix->mult;
+ return 0;
}
=20
static int clk_factor_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractio=
nal-divider.c
index 6aa72d9..1f1ba3e 100644
--- a/drivers/clk/clk-fractional-divider.c
+++ b/drivers/clk/clk-fractional-divider.c
@@ -45,24 +45,26 @@ static unsigned long clk_fd_recalc_rate(struct clk_hw *=
hw,
return ret;
}
=20
-static long clk_fd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_fd_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_fractional_divider *fd =3D to_clk_fd(hw);
unsigned maxn =3D (fd->nmask >> fd->nshift) + 1;
unsigned div;
=20
- if (!rate || rate >=3D *prate)
- return *prate;
+ if (!*rate || *rate >=3D *prate) {
+ *rate =3D *prate;
+ return 0;
+ }
=20
- div =3D gcd(*prate, rate);
+ div =3D gcd(*prate, *rate);
=20
while ((*prate / div) > maxn) {
div <<=3D 1;
- rate <<=3D 1;
+ *rate <<=3D 1;
}
=20
- return rate;
+ return 0;
}
=20
static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-highbank.c b/drivers/clk/clk-highbank.c
index 2e7e9d9..f26d1b0 100644
--- a/drivers/clk/clk-highbank.c
+++ b/drivers/clk/clk-highbank.c
@@ -142,15 +142,16 @@ static void clk_pll_calc(unsigned long rate, unsigned=
long ref_freq,
*pdivf =3D divf;
}
=20
-static long clk_pll_round_rate(struct clk_hw *hwclk, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_pll_round_rate(struct clk_hw *hwclk, unsigned long *rate,
+ unsigned long *parent_rate)
{
u32 divq, divf;
unsigned long ref_freq =3D *parent_rate;
=20
- clk_pll_calc(rate, ref_freq, &divq, &divf);
+ clk_pll_calc(*rate, ref_freq, &divq, &divf);
=20
- return (ref_freq * (divf + 1)) / (1 << divq);
+ *rate =3D (ref_freq * (divf + 1)) / (1 << divq);
+ return 0;
}
=20
static int clk_pll_set_rate(struct clk_hw *hwclk, unsigned long rate,
@@ -239,16 +240,17 @@ static unsigned long clk_periclk_recalc_rate(struct c=
lk_hw *hwclk,
return parent_rate / div;
}
=20
-static long clk_periclk_round_rate(struct clk_hw *hwclk, unsigned long rat=
e,
- unsigned long *parent_rate)
+static int clk_periclk_round_rate(struct clk_hw *hwclk, unsigned long *rat=
e,
+ unsigned long *parent_rate)
{
u32 div;
=20
- div =3D *parent_rate / rate;
+ div =3D *parent_rate / *rate;
div++;
div &=3D ~0x1;
=20
- return *parent_rate / div;
+ *rate =3D *parent_rate / div;
+ return 0;
}
=20
static int clk_periclk_set_rate(struct clk_hw *hwclk, unsigned long rate,
diff --git a/drivers/clk/clk-si5351.c b/drivers/clk/clk-si5351.c
index 3b2a66f..8fad555 100644
--- a/drivers/clk/clk-si5351.c
+++ b/drivers/clk/clk-si5351.c
@@ -446,30 +446,30 @@ static unsigned long si5351_pll_recalc_rate(struct cl=
k_hw *hw,
return (unsigned long)rate;
}
=20
-static long si5351_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int si5351_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct si5351_hw_data *hwdata =3D
container_of(hw, struct si5351_hw_data, hw);
unsigned long rfrac, denom, a, b, c;
unsigned long long lltmp;
=20
- if (rate < SI5351_PLL_VCO_MIN)
- rate =3D SI5351_PLL_VCO_MIN;
- if (rate > SI5351_PLL_VCO_MAX)
- rate =3D SI5351_PLL_VCO_MAX;
+ if (*rate < SI5351_PLL_VCO_MIN)
+ *rate =3D SI5351_PLL_VCO_MIN;
+ if (*rate > SI5351_PLL_VCO_MAX)
+ *rate =3D SI5351_PLL_VCO_MAX;
=20
/* determine integer part of feedback equation */
- a =3D rate / *parent_rate;
+ a =3D *rate / *parent_rate;
=20
if (a < SI5351_PLL_A_MIN)
- rate =3D *parent_rate * SI5351_PLL_A_MIN;
+ *rate =3D *parent_rate * SI5351_PLL_A_MIN;
if (a > SI5351_PLL_A_MAX)
- rate =3D *parent_rate * SI5351_PLL_A_MAX;
+ *rate =3D *parent_rate * SI5351_PLL_A_MAX;
=20
/* find best approximation for b/c =3D fVCO mod fIN */
denom =3D 1000 * 1000;
- lltmp =3D rate % (*parent_rate);
+ lltmp =3D *rate % (*parent_rate);
lltmp *=3D denom;
do_div(lltmp, *parent_rate);
rfrac =3D (unsigned long)lltmp;
@@ -492,15 +492,15 @@ static long si5351_pll_round_rate(struct clk_hw *hw, =
unsigned long rate,
lltmp *=3D b;
do_div(lltmp, c);
=20
- rate =3D (unsigned long)lltmp;
- rate +=3D *parent_rate * a;
+ *rate =3D (unsigned long)lltmp;
+ *rate +=3D *parent_rate * a;
=20
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: a =3D %lu, b =3D %lu, c =3D %lu, parent_rate =3D %lu, rate =3D=
%lu\n",
__func__, __clk_get_name(hwdata->hw.clk), a, b, c,
- *parent_rate, rate);
+ *parent_rate, *rate);
=20
- return rate;
+ return 0;
}
=20
static int si5351_pll_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -639,8 +639,8 @@ static unsigned long si5351_msynth_recalc_rate(struct c=
lk_hw *hw,
return (unsigned long)rate;
}
=20
-static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate=
,
- unsigned long *parent_rate)
+static int si5351_msynth_round_rate(struct clk_hw *hw, unsigned long *rate=
,
+ unsigned long *parent_rate)
{
struct si5351_hw_data *hwdata =3D
container_of(hw, struct si5351_hw_data, hw);
@@ -649,17 +649,17 @@ static long si5351_msynth_round_rate(struct clk_hw *h=
w, unsigned long rate,
int divby4;
=20
/* multisync6-7 can only handle freqencies < 150MHz */
- if (hwdata->num >=3D 6 && rate > SI5351_MULTISYNTH67_MAX_FREQ)
- rate =3D SI5351_MULTISYNTH67_MAX_FREQ;
+ if (hwdata->num >=3D 6 && *rate > SI5351_MULTISYNTH67_MAX_FREQ)
+ *rate =3D SI5351_MULTISYNTH67_MAX_FREQ;
=20
/* multisync frequency is 1MHz .. 160MHz */
- if (rate > SI5351_MULTISYNTH_MAX_FREQ)
- rate =3D SI5351_MULTISYNTH_MAX_FREQ;
- if (rate < SI5351_MULTISYNTH_MIN_FREQ)
- rate =3D SI5351_MULTISYNTH_MIN_FREQ;
+ if (*rate > SI5351_MULTISYNTH_MAX_FREQ)
+ *rate =3D SI5351_MULTISYNTH_MAX_FREQ;
+ if (*rate < SI5351_MULTISYNTH_MIN_FREQ)
+ *rate =3D SI5351_MULTISYNTH_MIN_FREQ;
=20
divby4 =3D 0;
- if (rate > SI5351_MULTISYNTH_DIVBY4_FREQ)
+ if (*rate > SI5351_MULTISYNTH_DIVBY4_FREQ)
divby4 =3D 1;
=20
/* multisync can set pll */
@@ -670,7 +670,7 @@ static long si5351_msynth_round_rate(struct clk_hw *hw,=
unsigned long rate,
*/
if (divby4 =3D=3D 0) {
lltmp =3D SI5351_PLL_VCO_MAX;
- do_div(lltmp, rate);
+ do_div(lltmp, *rate);
a =3D (unsigned long)lltmp;
} else
a =3D 4;
@@ -678,18 +678,18 @@ static long si5351_msynth_round_rate(struct clk_hw *h=
w, unsigned long rate,
b =3D 0;
c =3D 1;
=20
- *parent_rate =3D a * rate;
+ *parent_rate =3D a * *rate;
} else {
unsigned long rfrac, denom;
=20
/* disable divby4 */
if (divby4) {
- rate =3D SI5351_MULTISYNTH_DIVBY4_FREQ;
+ *rate =3D SI5351_MULTISYNTH_DIVBY4_FREQ;
divby4 =3D 0;
}
=20
/* determine integer part of divider equation */
- a =3D *parent_rate / rate;
+ a =3D *parent_rate / *rate;
if (a < SI5351_MULTISYNTH_A_MIN)
a =3D SI5351_MULTISYNTH_A_MIN;
if (hwdata->num >=3D 6 && a > SI5351_MULTISYNTH67_A_MAX)
@@ -699,9 +699,9 @@ static long si5351_msynth_round_rate(struct clk_hw *hw,=
unsigned long rate,
=20
/* find best approximation for b/c =3D fVCO mod fOUT */
denom =3D 1000 * 1000;
- lltmp =3D (*parent_rate) % rate;
+ lltmp =3D (*parent_rate) % *rate;
lltmp *=3D denom;
- do_div(lltmp, rate);
+ do_div(lltmp, *rate);
rfrac =3D (unsigned long)lltmp;
=20
b =3D 0;
@@ -716,7 +716,7 @@ static long si5351_msynth_round_rate(struct clk_hw *hw,=
unsigned long rate,
lltmp =3D *parent_rate;
lltmp *=3D c;
do_div(lltmp, a * c + b);
- rate =3D (unsigned long)lltmp;
+ *rate =3D (unsigned long)lltmp;
=20
/* calculate parameters */
if (divby4) {
@@ -734,9 +734,9 @@ static long si5351_msynth_round_rate(struct clk_hw *hw,=
unsigned long rate,
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: a =3D %lu, b =3D %lu, c =3D %lu, divby4 =3D %d, parent_rate =
=3D %lu, rate =3D %lu\n",
__func__, __clk_get_name(hwdata->hw.clk), a, b, c, divby4,
- *parent_rate, rate);
+ *parent_rate, *rate);
=20
- return rate;
+ return 0;
}
=20
static int si5351_msynth_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -983,57 +983,57 @@ static unsigned long si5351_clkout_recalc_rate(struct=
clk_hw *hw,
return parent_rate >> rdiv;
}
=20
-static long si5351_clkout_round_rate(struct clk_hw *hw, unsigned long rate=
,
- unsigned long *parent_rate)
+static int si5351_clkout_round_rate(struct clk_hw *hw, unsigned long *rate=
,
+ unsigned long *parent_rate)
{
struct si5351_hw_data *hwdata =3D
container_of(hw, struct si5351_hw_data, hw);
unsigned char rdiv;
=20
/* clkout6/7 can only handle output freqencies < 150MHz */
- if (hwdata->num >=3D 6 && rate > SI5351_CLKOUT67_MAX_FREQ)
- rate =3D SI5351_CLKOUT67_MAX_FREQ;
+ if (hwdata->num >=3D 6 && *rate > SI5351_CLKOUT67_MAX_FREQ)
+ *rate =3D SI5351_CLKOUT67_MAX_FREQ;
=20
/* clkout freqency is 8kHz - 160MHz */
- if (rate > SI5351_CLKOUT_MAX_FREQ)
- rate =3D SI5351_CLKOUT_MAX_FREQ;
- if (rate < SI5351_CLKOUT_MIN_FREQ)
- rate =3D SI5351_CLKOUT_MIN_FREQ;
+ if (*rate > SI5351_CLKOUT_MAX_FREQ)
+ *rate =3D SI5351_CLKOUT_MAX_FREQ;
+ if (*rate < SI5351_CLKOUT_MIN_FREQ)
+ *rate =3D SI5351_CLKOUT_MIN_FREQ;
=20
/* request frequency if multisync master */
if (__clk_get_flags(hwdata->hw.clk) & CLK_SET_RATE_PARENT) {
/* use r divider for frequencies below 1MHz */
rdiv =3D SI5351_OUTPUT_CLK_DIV_1;
- while (rate < SI5351_MULTISYNTH_MIN_FREQ &&
+ while (*rate < SI5351_MULTISYNTH_MIN_FREQ &&
rdiv < SI5351_OUTPUT_CLK_DIV_128) {
rdiv +=3D 1;
- rate *=3D 2;
+ *rate *=3D 2;
}
- *parent_rate =3D rate;
+ *parent_rate =3D *rate;
} else {
unsigned long new_rate, new_err, err;
=20
/* round to closed rdiv */
rdiv =3D SI5351_OUTPUT_CLK_DIV_1;
new_rate =3D *parent_rate;
- err =3D abs(new_rate - rate);
+ err =3D abs(new_rate - *rate);
do {
new_rate >>=3D 1;
- new_err =3D abs(new_rate - rate);
+ new_err =3D abs(new_rate - *rate);
if (new_err > err || rdiv =3D=3D SI5351_OUTPUT_CLK_DIV_128)
break;
rdiv++;
err =3D new_err;
} while (1);
}
- rate =3D *parent_rate >> rdiv;
+ *rate =3D *parent_rate >> rdiv;
=20
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: rdiv =3D %u, parent_rate =3D %lu, rate =3D %lu\n",
__func__, __clk_get_name(hwdata->hw.clk), (1 << rdiv),
- *parent_rate, rate);
+ *parent_rate, *rate);
=20
- return rate;
+ return 0;
}
=20
static int si5351_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-si570.c b/drivers/clk/clk-si570.c
index fc167b3..0680863 100644
--- a/drivers/clk/clk-si570.c
+++ b/drivers/clk/clk-si570.c
@@ -245,7 +245,7 @@ static unsigned long si570_recalc_rate(struct clk_hw *h=
w,
return rate;
}
=20
-static long si570_round_rate(struct clk_hw *hw, unsigned long rate,
+static int si570_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
int err;
@@ -253,26 +253,26 @@ static long si570_round_rate(struct clk_hw *hw, unsig=
ned long rate,
unsigned int n1, hs_div;
struct clk_si570 *data =3D to_clk_si570(hw);
=20
- if (!rate)
+ if (!*rate)
return 0;
=20
- if (div64_u64(abs(rate - data->frequency) * 10000LL,
+ if (div64_u64(abs(*rate - data->frequency) * 10000LL,
data->frequency) < 35) {
- rfreq =3D div64_u64((data->rfreq * rate) +
+ rfreq =3D div64_u64((data->rfreq * *rate) +
div64_u64(data->frequency, 2), data->frequency);
n1 =3D data->n1;
hs_div =3D data->hs_div;
=20
} else {
- err =3D si570_calc_divs(rate, data, &rfreq, &n1, &hs_div);
+ err =3D si570_calc_divs(*rate, data, &rfreq, &n1, &hs_div);
if (err) {
dev_err(&data->i2c_client->dev,
"unable to round rate\n");
- return 0;
+ *rate =3D 0;
}
}
=20
- return rate;
+ return 0;
}
=20
/**
diff --git a/drivers/clk/clk-u300.c b/drivers/clk/clk-u300.c
index 406bfc1..5e3163b 100644
--- a/drivers/clk/clk-u300.c
+++ b/drivers/clk/clk-u300.c
@@ -628,22 +628,27 @@ syscon_clk_recalc_rate(struct clk_hw *hw,
}
}
=20
-static long
-syscon_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int
+syscon_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_syscon *sclk =3D to_syscon(hw);
=20
- if (sclk->clk_val !=3D U300_SYSCON_SBCER_CPU_CLK_EN)
- return *prate;
+ if (sclk->clk_val !=3D U300_SYSCON_SBCER_CPU_CLK_EN) {
+ *rate =3D *prate;
+ return 0;
+ }
/* We really only support setting the rate of the CPU clock */
- if (rate <=3D 13000000)
- return 13000000;
- if (rate <=3D 52000000)
- return 52000000;
- if (rate <=3D 104000000)
- return 104000000;
- return 208000000;
+ if (*rate <=3D 13000000)
+ *rate =3D 13000000;
+ else if (*rate <=3D 52000000)
+ *rate =3D 52000000;
+ else if (*rate <=3D 104000000)
+ *rate =3D 104000000;
+ else
+ *rate =3D 208000000;
+
+ return 0;
}
=20
static int syscon_clk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -1037,26 +1042,28 @@ mclk_clk_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
=20
-static long
-mclk_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int
+mclk_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
- if (rate <=3D 18900000)
- return 18900000;
- if (rate <=3D 20800000)
- return 20800000;
- if (rate <=3D 23100000)
- return 23100000;
- if (rate <=3D 26000000)
- return 26000000;
- if (rate <=3D 29700000)
- return 29700000;
- if (rate <=3D 34700000)
- return 34700000;
- if (rate <=3D 41600000)
- return 41600000;
- /* Highest rate */
- return 52000000;
+ if (*rate <=3D 18900000)
+ *rate =3D 18900000;
+ else if (*rate <=3D 20800000)
+ *rate =3D 20800000;
+ else if (*rate <=3D 23100000)
+ *rate =3D 23100000;
+ else if (*rate <=3D 26000000)
+ *rate =3D 26000000;
+ else if (*rate <=3D 29700000)
+ *rate =3D 29700000;
+ else if (*rate <=3D 34700000)
+ *rate =3D 34700000;
+ else if (*rate <=3D 41600000)
+ *rate =3D 41600000;
+ else
+ *rate =3D 52000000;
+
+ return 0;
}
=20
static int mclk_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-vt8500.c b/drivers/clk/clk-vt8500.c
index 37e9288..221eec3 100644
--- a/drivers/clk/clk-vt8500.c
+++ b/drivers/clk/clk-vt8500.c
@@ -137,19 +137,19 @@ static unsigned long vt8500_dclk_recalc_rate(struct c=
lk_hw *hw,
return parent_rate / div;
}
=20
-static long vt8500_dclk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int vt8500_dclk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_device *cdev =3D to_clk_device(hw);
u32 divisor;
=20
- if (rate =3D=3D 0)
+ if (*rate =3D=3D 0)
return 0;
=20
- divisor =3D *prate / rate;
+ divisor =3D *prate / *rate;
=20
/* If prate / rate would be decimal, incr the divisor */
- if (rate * divisor < *prate)
+ if (*rate * divisor < *prate)
divisor++;
=20
/*
@@ -160,7 +160,8 @@ static long vt8500_dclk_round_rate(struct clk_hw *hw, u=
nsigned long rate,
divisor =3D 64 * ((divisor / 64) + 1);
}
=20
- return *prate / divisor;
+ *rate =3D *prate / divisor;
+ return 0;
}
=20
static int vt8500_dclk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -579,8 +580,8 @@ static int vtwm_pll_set_rate(struct clk_hw *hw, unsigne=
d long rate,
return 0;
}
=20
-static long vtwm_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int vtwm_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_pll *pll =3D to_clk_pll(hw);
u32 filter, mul, div1, div2;
@@ -588,26 +589,28 @@ static long vtwm_pll_round_rate(struct clk_hw *hw, un=
signed long rate,
=20
switch (pll->type) {
case PLL_TYPE_VT8500:
- vt8500_find_pll_bits(rate, *prate, &mul, &div1);
+ vt8500_find_pll_bits(*rate, *prate, &mul, &div1);
round_rate =3D VT8500_BITS_TO_FREQ(*prate, mul, div1);
break;
case PLL_TYPE_WM8650:
- wm8650_find_pll_bits(rate, *prate, &mul, &div1, &div2);
+ wm8650_find_pll_bits(*rate, *prate, &mul, &div1, &div2);
round_rate =3D WM8650_BITS_TO_FREQ(*prate, mul, div1, div2);
break;
case PLL_TYPE_WM8750:
- wm8750_find_pll_bits(rate, *prate, &filter, &mul, &div1, &div2);
+ wm8750_find_pll_bits(*rate, *prate, &filter, &mul, &div1,
+ &div2);
round_rate =3D WM8750_BITS_TO_FREQ(*prate, mul, div1, div2);
break;
case PLL_TYPE_WM8850:
- wm8850_find_pll_bits(rate, *prate, &mul, &div1, &div2);
+ wm8850_find_pll_bits(*rate, *prate, &mul, &div1, &div2);
round_rate =3D WM8850_BITS_TO_FREQ(*prate, mul, div1, div2);
break;
default:
round_rate =3D 0;
}
=20
- return round_rate;
+ *rate =3D round_rate;
+ return 0;
}
=20
static unsigned long vtwm_pll_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/clk-wm831x.c b/drivers/clk/clk-wm831x.c
index ef67719..23db1b5 100644
--- a/drivers/clk/clk-wm831x.c
+++ b/drivers/clk/clk-wm831x.c
@@ -142,18 +142,19 @@ static unsigned long wm831x_fll_recalc_rate(struct cl=
k_hw *hw,
return 0;
}
=20
-static long wm831x_fll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *unused)
+static int wm831x_fll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *unused)
{
int best =3D 0;
int i;
=20
for (i =3D 0; i < ARRAY_SIZE(wm831x_fll_auto_rates); i++)
- if (abs(wm831x_fll_auto_rates[i] - rate) <
- abs(wm831x_fll_auto_rates[best] - rate))
+ if (abs(wm831x_fll_auto_rates[i] - *rate) <
+ abs(wm831x_fll_auto_rates[best] - *rate))
best =3D i;
=20
- return wm831x_fll_auto_rates[best];
+ *rate =3D wm831x_fll_auto_rates[best];
+ return 0;
}
=20
static int wm831x_fll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-xgene.c b/drivers/clk/clk-xgene.c
index dd8a62d..27460e3 100644
--- a/drivers/clk/clk-xgene.c
+++ b/drivers/clk/clk-xgene.c
@@ -367,7 +367,7 @@ static int xgene_clk_set_rate(struct clk_hw *hw, unsign=
ed long rate,
return parent_rate / divider_save;
}
=20
-static long xgene_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int xgene_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct xgene_clk *pclk =3D to_xgene_clk(hw);
@@ -376,14 +376,15 @@ static long xgene_clk_round_rate(struct clk_hw *hw, u=
nsigned long rate,
=20
if (pclk->param.divider_reg) {
/* Let's compute the divider */
- if (rate > parent_rate)
- rate =3D parent_rate;
- divider =3D parent_rate / rate; /* Rounded down */
+ if (*rate > parent_rate)
+ *rate =3D parent_rate;
+ divider =3D parent_rate / *rate; /* Rounded down */
} else {
divider =3D 1;
}
=20
- return parent_rate / divider;
+ *rate =3D parent_rate / divider;
+ return 0;
}
=20
const struct clk_ops xgene_clk_ops =3D {
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index fa5a00e..1462ddc 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1146,9 +1146,12 @@ static unsigned long clk_core_round_rate_nolock(stru=
ct clk_core *clk,
return clk->ops->determine_rate(clk->hw, rate,
min_rate, max_rate,
&parent_rate, &parent_hw);
- } else if (clk->ops->round_rate)
- return clk->ops->round_rate(clk->hw, rate, &parent_rate);
- else if (clk->flags & CLK_SET_RATE_PARENT)
+ } else if (clk->ops->round_rate) {
+ if (clk->ops->round_rate(clk->hw, &rate, &parent_rate))
+ return 0;
+
+ return rate;
+ } else if (clk->flags & CLK_SET_RATE_PARENT)
return clk_core_round_rate_nolock(clk->parent, rate, min_rate,
max_rate);
else
@@ -1640,8 +1643,10 @@ static struct clk_core *clk_calc_new_rates(struct cl=
k_core *clk,
&parent_hw);
parent =3D parent_hw ? parent_hw->core : NULL;
} else if (clk->ops->round_rate) {
- new_rate =3D clk->ops->round_rate(clk->hw, rate,
- &best_parent_rate);
+ if (clk->ops->round_rate(clk->hw, &new_rate,
+ &best_parent_rate))
+ return NULL;
+
if (new_rate < min_rate || new_rate > max_rate)
return NULL;
} else if (!parent || !(clk->flags & CLK_SET_RATE_PARENT)) {
diff --git a/drivers/clk/mmp/clk-frac.c b/drivers/clk/mmp/clk-frac.c
index 584a992..6652983 100644
--- a/drivers/clk/mmp/clk-frac.c
+++ b/drivers/clk/mmp/clk-frac.c
@@ -24,7 +24,7 @@
=20
#define to_clk_factor(hw) container_of(hw, struct mmp_clk_factor, hw)
=20
-static long clk_factor_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_factor_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct mmp_clk_factor *factor =3D to_clk_factor(hw);
@@ -35,17 +35,19 @@ static long clk_factor_round_rate(struct clk_hw *hw, un=
signed long drate,
prev_rate =3D rate;
rate =3D (((*prate / 10000) * factor->ftbl[i].den) /
(factor->ftbl[i].num * factor->masks->factor)) * 10000;
- if (rate > drate)
+ if (rate > *drate)
break;
}
if ((i =3D=3D 0) || (i =3D=3D factor->ftbl_cnt)) {
- return rate;
+ *drate =3D rate;
} else {
- if ((drate - prev_rate) > (rate - drate))
- return rate;
+ if ((*drate - prev_rate) > (rate - *drate))
+ *drate =3D rate;
else
- return prev_rate;
+ *drate =3D prev_rate;
}
+
+ return 0;
}
=20
static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/mvebu/clk-corediv.c b/drivers/clk/mvebu/clk-coredi=
v.c
index d1e5863..c5aee2f 100644
--- a/drivers/clk/mvebu/clk-corediv.c
+++ b/drivers/clk/mvebu/clk-corediv.c
@@ -132,19 +132,20 @@ static unsigned long clk_corediv_recalc_rate(struct c=
lk_hw *hwclk,
return parent_rate / div;
}
=20
-static long clk_corediv_round_rate(struct clk_hw *hwclk, unsigned long rat=
e,
+static int clk_corediv_round_rate(struct clk_hw *hwclk, unsigned long *rat=
e,
unsigned long *parent_rate)
{
/* Valid ratio are 1:4, 1:5, 1:6 and 1:8 */
u32 div;
=20
- div =3D *parent_rate / rate;
+ div =3D *parent_rate / *rate;
if (div < 4)
div =3D 4;
else if (div > 6)
div =3D 8;
=20
- return *parent_rate / div;
+ *rate =3D *parent_rate / div;
+ return 0;
}
=20
static int clk_corediv_set_rate(struct clk_hw *hwclk, unsigned long rate,
diff --git a/drivers/clk/mvebu/clk-cpu.c b/drivers/clk/mvebu/clk-cpu.c
index 3821a88..0279b50 100644
--- a/drivers/clk/mvebu/clk-cpu.c
+++ b/drivers/clk/mvebu/clk-cpu.c
@@ -57,19 +57,20 @@ static unsigned long clk_cpu_recalc_rate(struct clk_hw =
*hwclk,
return parent_rate / div;
}
=20
-static long clk_cpu_round_rate(struct clk_hw *hwclk, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_cpu_round_rate(struct clk_hw *hwclk, unsigned long *rate,
+ unsigned long *parent_rate)
{
/* Valid ratio are 1:1, 1:2 and 1:3 */
u32 div;
=20
- div =3D *parent_rate / rate;
+ div =3D *parent_rate / *rate;
if (div =3D=3D 0)
div =3D 1;
else if (div > 3)
div =3D 3;
=20
- return *parent_rate / div;
+ *rate =3D *parent_rate / div;
+ return 0;
}
=20
static int clk_cpu_off_set_rate(struct clk_hw *hwclk, unsigned long rate,
diff --git a/drivers/clk/mxs/clk-div.c b/drivers/clk/mxs/clk-div.c
index 90e1da9..3677e51 100644
--- a/drivers/clk/mxs/clk-div.c
+++ b/drivers/clk/mxs/clk-div.c
@@ -47,8 +47,8 @@ static unsigned long clk_div_recalc_rate(struct clk_hw *h=
w,
return div->ops->recalc_rate(&div->divider.hw, parent_rate);
}
=20
-static long clk_div_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_div_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_div *div =3D to_clk_div(hw);
=20
diff --git a/drivers/clk/mxs/clk-frac.c b/drivers/clk/mxs/clk-frac.c
index e6aa6b5..86fc3bb 100644
--- a/drivers/clk/mxs/clk-frac.c
+++ b/drivers/clk/mxs/clk-frac.c
@@ -49,18 +49,18 @@ static unsigned long clk_frac_recalc_rate(struct clk_hw=
*hw,
return (parent_rate >> frac->width) * div;
}
=20
-static long clk_frac_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_frac_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_frac *frac =3D to_clk_frac(hw);
unsigned long parent_rate =3D *prate;
u32 div;
u64 tmp;
=20
- if (rate > parent_rate)
+ if (*rate > parent_rate)
return -EINVAL;
=20
- tmp =3D rate;
+ tmp =3D *rate;
tmp <<=3D frac->width;
do_div(tmp, parent_rate);
div =3D tmp;
@@ -68,7 +68,8 @@ static long clk_frac_round_rate(struct clk_hw *hw, unsign=
ed long rate,
if (!div)
return -EINVAL;
=20
- return (parent_rate >> frac->width) * div;
+ *rate =3D (parent_rate >> frac->width) * div;
+ return 0;
}
=20
static int clk_frac_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/mxs/clk-ref.c b/drivers/clk/mxs/clk-ref.c
index 4adeed6..e0d6529 100644
--- a/drivers/clk/mxs/clk-ref.c
+++ b/drivers/clk/mxs/clk-ref.c
@@ -64,15 +64,15 @@ static unsigned long clk_ref_recalc_rate(struct clk_hw =
*hw,
return tmp;
}
=20
-static long clk_ref_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_ref_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long parent_rate =3D *prate;
u64 tmp =3D parent_rate;
u8 frac;
=20
- tmp =3D tmp * 18 + rate / 2;
- do_div(tmp, rate);
+ tmp =3D tmp * 18 + *rate / 2;
+ do_div(tmp, *rate);
frac =3D tmp;
=20
if (frac < 18)
@@ -83,8 +83,9 @@ static long clk_ref_round_rate(struct clk_hw *hw, unsigne=
d long rate,
tmp =3D parent_rate;
tmp *=3D 18;
do_div(tmp, frac);
+ *rate =3D tmp;
=20
- return tmp;
+ return 0;
}
=20
static int clk_ref_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/qcom/clk-regmap-divider.c b/drivers/clk/qcom/clk-r=
egmap-divider.c
index 5348491..1720da4 100644
--- a/drivers/clk/qcom/clk-regmap-divider.c
+++ b/drivers/clk/qcom/clk-regmap-divider.c
@@ -23,8 +23,8 @@ static inline struct clk_regmap_div *to_clk_regmap_div(st=
ruct clk_hw *hw)
return container_of(to_clk_regmap(hw), struct clk_regmap_div, clkr);
}
=20
-static long div_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int div_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_regmap_div *divider =3D to_clk_regmap_div(hw);
=20
diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.=
c
index f8d3baf..bd408ef 100644
--- a/drivers/clk/rockchip/clk-pll.c
+++ b/drivers/clk/rockchip/clk-pll.c
@@ -63,8 +63,8 @@ static const struct rockchip_pll_rate_table *rockchip_get=
_pll_settings(
return NULL;
}
=20
-static long rockchip_pll_round_rate(struct clk_hw *hw,
- unsigned long drate, unsigned long *prate)
+static int rockchip_pll_round_rate(struct clk_hw *hw,
+ unsigned long *drate, unsigned long *prate)
{
struct rockchip_clk_pll *pll =3D to_rockchip_clk_pll(hw);
const struct rockchip_pll_rate_table *rate_table =3D pll->rate_table;
@@ -72,12 +72,15 @@ static long rockchip_pll_round_rate(struct clk_hw *hw,
=20
/* Assumming rate_table is in descending order */
for (i =3D 0; i < pll->rate_count; i++) {
- if (drate >=3D rate_table[i].rate)
- return rate_table[i].rate;
+ if (*drate >=3D rate_table[i].rate) {
+ *drate =3D rate_table[i].rate;
+ return 0;
+ }
}
=20
/* return minimum supported value */
- return rate_table[i - 1].rate;
+ *drate =3D rate_table[i - 1].rate;
+ return 0;
}
=20
/*
diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c
index 9d70e5c..0128de2 100644
--- a/drivers/clk/samsung/clk-pll.c
+++ b/drivers/clk/samsung/clk-pll.c
@@ -42,8 +42,8 @@ static const struct samsung_pll_rate_table *samsung_get_p=
ll_settings(
return NULL;
}
=20
-static long samsung_pll_round_rate(struct clk_hw *hw,
- unsigned long drate, unsigned long *prate)
+static int samsung_pll_round_rate(struct clk_hw *hw,
+ unsigned long *drate, unsigned long *prate)
{
struct samsung_clk_pll *pll =3D to_clk_pll(hw);
const struct samsung_pll_rate_table *rate_table =3D pll->rate_table;
@@ -51,12 +51,15 @@ static long samsung_pll_round_rate(struct clk_hw *hw,
=20
/* Assumming rate_table is in descending order */
for (i =3D 0; i < pll->rate_count; i++) {
- if (drate >=3D rate_table[i].rate)
- return rate_table[i].rate;
+ if (*drate >=3D rate_table[i].rate) {
+ *drate =3D rate_table[i].rate;
+ return 0;
+ }
}
=20
/* return minimum supported value */
- return rate_table[i - 1].rate;
+ *drate =3D rate_table[i - 1].rate;
+ return 0;
}
=20
/*
diff --git a/drivers/clk/shmobile/clk-div6.c b/drivers/clk/shmobile/clk-div=
6.c
index 036a692..d31ae3d 100644
--- a/drivers/clk/shmobile/clk-div6.c
+++ b/drivers/clk/shmobile/clk-div6.c
@@ -97,12 +97,13 @@ static unsigned int cpg_div6_clock_calc_div(unsigned lo=
ng rate,
return clamp_t(unsigned int, div, 1, 64);
}
=20
-static long cpg_div6_clock_round_rate(struct clk_hw *hw, unsigned long rat=
e,
+static int cpg_div6_clock_round_rate(struct clk_hw *hw, unsigned long *rat=
e,
unsigned long *parent_rate)
{
- unsigned int div =3D cpg_div6_clock_calc_div(rate, *parent_rate);
+ unsigned int div =3D cpg_div6_clock_calc_div(*rate, *parent_rate);
=20
- return *parent_rate / div;
+ *rate =3D *parent_rate / div;
+ return 0;
}
=20
static int cpg_div6_clock_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/shmobile/clk-rcar-gen2.c b/drivers/clk/shmobile/cl=
k-rcar-gen2.c
index acfb6d7..57581a9 100644
--- a/drivers/clk/shmobile/clk-rcar-gen2.c
+++ b/drivers/clk/shmobile/clk-rcar-gen2.c
@@ -68,8 +68,8 @@ static unsigned long cpg_z_clk_recalc_rate(struct clk_hw =
*hw,
return div_u64((u64)parent_rate * mult, 32);
}
=20
-static long cpg_z_clk_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cpg_z_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long prate =3D *parent_rate;
unsigned int mult;
@@ -77,10 +77,11 @@ static long cpg_z_clk_round_rate(struct clk_hw *hw, uns=
igned long rate,
if (!prate)
prate =3D 1;
=20
- mult =3D div_u64((u64)rate * 32, prate);
+ mult =3D div_u64((u64)*rate * 32, prate);
mult =3D clamp(mult, 1U, 32U);
=20
- return *parent_rate / 32 * mult;
+ *rate =3D *parent_rate / 32 * mult;
+ return 0;
}
=20
static int cpg_z_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/sirf/clk-common.c b/drivers/clk/sirf/clk-common.c
index 37af51c..68a7889 100644
--- a/drivers/clk/sirf/clk-common.c
+++ b/drivers/clk/sirf/clk-common.c
@@ -91,7 +91,7 @@ static unsigned long pll_clk_recalc_rate(struct clk_hw *h=
w,
}
}
=20
-static long pll_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int pll_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
unsigned long fin, nf, nr, od;
@@ -101,9 +101,9 @@ static long pll_clk_round_rate(struct clk_hw *hw, unsig=
ned long rate,
* fout =3D fin * nf / (nr * od);
* set od =3D 1, nr =3D fin/MHz, so fout =3D nf * MHz
*/
- rate =3D rate - rate % MHZ;
+ *rate =3D *rate - *rate % MHZ;
=20
- nf =3D rate / MHZ;
+ nf =3D *rate / MHZ;
if (nf > BIT(13))
nf =3D BIT(13);
if (nf < 1)
@@ -119,7 +119,8 @@ static long pll_clk_round_rate(struct clk_hw *hw, unsig=
ned long rate,
dividend =3D (u64)fin * nf;
do_div(dividend, nr * od);
=20
- return (long)dividend;
+ *rate =3D dividend;
+ return 0;
}
=20
static int pll_clk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -158,7 +159,7 @@ static int pll_clk_set_rate(struct clk_hw *hw, unsigned=
long rate,
return 0;
}
=20
-static long cpu_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int cpu_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
/*
@@ -347,7 +348,7 @@ static unsigned long dmn_clk_recalc_rate(struct clk_hw =
*hw,
}
}
=20
-static long dmn_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int dmn_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
unsigned long fin;
@@ -355,7 +356,7 @@ static long dmn_clk_round_rate(struct clk_hw *hw, unsig=
ned long rate,
unsigned bits =3D (strcmp(hw->init->name, "mem") =3D=3D 0) ? 3 : 4;
=20
fin =3D *parent_rate;
- ratio =3D fin / rate;
+ ratio =3D fin / *rate;
=20
if (ratio < 2)
ratio =3D 2;
@@ -365,7 +366,8 @@ static long dmn_clk_round_rate(struct clk_hw *hw, unsig=
ned long rate,
wait =3D (ratio >> 1) - 1;
hold =3D ratio - wait - 2;
=20
- return fin / (wait + hold + 2);
+ *rate =3D fin / (wait + hold + 2);
+ return 0;
}
=20
static int dmn_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/spear/clk-aux-synth.c b/drivers/clk/spear/clk-aux-=
synth.c
index bdfb442..1a93f6a 100644
--- a/drivers/clk/spear/clk-aux-synth.c
+++ b/drivers/clk/spear/clk-aux-synth.c
@@ -52,14 +52,20 @@ static unsigned long aux_calc_rate(struct clk_hw *hw, u=
nsigned long prate,
(rtbl[index].yscale * eq)) * 10000;
}
=20
-static long clk_aux_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_aux_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_aux *aux =3D to_clk_aux(hw);
int unused;
+ long ret;
=20
- return clk_round_rate_index(hw, drate, *prate, aux_calc_rate,
+ ret =3D clk_round_rate_index(hw, *drate, *prate, aux_calc_rate,
aux->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate =3D ret;
+ return 0;
}
=20
static unsigned long clk_aux_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/spear/clk-frac-synth.c b/drivers/clk/spear/clk-fra=
c-synth.c
index dffd4ce..d4098c8 100644
--- a/drivers/clk/spear/clk-frac-synth.c
+++ b/drivers/clk/spear/clk-frac-synth.c
@@ -55,14 +55,20 @@ static unsigned long frac_calc_rate(struct clk_hw *hw, =
unsigned long prate,
return prate;
}
=20
-static long clk_frac_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_frac_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_frac *frac =3D to_clk_frac(hw);
int unused;
+ long ret;
=20
- return clk_round_rate_index(hw, drate, *prate, frac_calc_rate,
+ ret =3D clk_round_rate_index(hw, *drate, *prate, frac_calc_rate,
frac->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate =3D ret;
+ return 0;
}
=20
static unsigned long clk_frac_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/spear/clk-gpt-synth.c b/drivers/clk/spear/clk-gpt-=
synth.c
index 1afc18c..ea3328b 100644
--- a/drivers/clk/spear/clk-gpt-synth.c
+++ b/drivers/clk/spear/clk-gpt-synth.c
@@ -42,14 +42,20 @@ static unsigned long gpt_calc_rate(struct clk_hw *hw, u=
nsigned long prate,
return prate;
}
=20
-static long clk_gpt_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_gpt_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_gpt *gpt =3D to_clk_gpt(hw);
int unused;
+ long ret;
=20
- return clk_round_rate_index(hw, drate, *prate, gpt_calc_rate,
+ ret =3D clk_round_rate_index(hw, *drate, *prate, gpt_calc_rate,
gpt->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate =3D ret;
+ return 0;
}
=20
static unsigned long clk_gpt_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/spear/clk-vco-pll.c b/drivers/clk/spear/clk-vco-pl=
l.c
index 1b9b65b..08b1411 100644
--- a/drivers/clk/spear/clk-vco-pll.c
+++ b/drivers/clk/spear/clk-vco-pll.c
@@ -113,12 +113,18 @@ static long clk_pll_round_rate_index(struct clk_hw *h=
w, unsigned long drate,
return rate;
}
=20
-static long clk_pll_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_pll_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
int unused;
+ long ret;
=20
- return clk_pll_round_rate_index(hw, drate, prate, &unused);
+ ret =3D clk_pll_round_rate_index(hw, *drate, prate, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate =3D ret;
+ return 0;
}
=20
static unsigned long clk_pll_recalc_rate(struct clk_hw *hw, unsigned long
@@ -179,14 +185,20 @@ static inline unsigned long vco_calc_rate(struct clk_=
hw *hw,
return pll_calc_rate(vco->rtbl, prate, index, NULL);
}
=20
-static long clk_vco_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_vco_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_vco *vco =3D to_clk_vco(hw);
int unused;
+ long ret;
=20
- return clk_round_rate_index(hw, drate, *prate, vco_calc_rate,
+ ret =3D clk_round_rate_index(hw, *drate, *prate, vco_calc_rate,
vco->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate =3D ret;
+ return 0;
}
=20
static unsigned long clk_vco_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/st/clk-flexgen.c b/drivers/clk/st/clk-flexgen.c
index bf12a25..d04278b 100644
--- a/drivers/clk/st/clk-flexgen.c
+++ b/drivers/clk/st/clk-flexgen.c
@@ -100,20 +100,21 @@ clk_best_div(unsigned long parent_rate, unsigned long=
rate)
return parent_rate / rate + ((rate > (2*(parent_rate % rate))) ? 0 : 1);
}
=20
-static long flexgen_round_rate(struct clk_hw *hw, unsigned long rate,
+static int flexgen_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
unsigned long div;
=20
/* Round div according to exact prate and wished rate */
- div =3D clk_best_div(*prate, rate);
+ div =3D clk_best_div(*prate, *rate);
=20
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
- *prate =3D rate * div;
- return rate;
+ *prate =3D *rate * div;
+ return 0;
}
=20
- return *prate / div;
+ *rate =3D *prate / div;
+ return 0;
}
=20
unsigned long flexgen_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/st/clkgen-fsyn.c b/drivers/clk/st/clkgen-fsyn.c
index af94ed8..7c70049 100644
--- a/drivers/clk/st/clkgen-fsyn.c
+++ b/drivers/clk/st/clkgen-fsyn.c
@@ -548,21 +548,22 @@ int clk_fs660c32_vco_get_params(unsigned long input,
return 0;
}
=20
-static long quadfs_pll_fs660c32_round_rate(struct clk_hw *hw, unsigned lon=
g rate
- , unsigned long *prate)
+static int quadfs_pll_fs660c32_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *prate)
{
struct stm_fs params;
=20
- if (!clk_fs660c32_vco_get_params(*prate, rate, ¶ms))
- clk_fs660c32_vco_get_rate(*prate, ¶ms, &rate);
+ if (!clk_fs660c32_vco_get_params(*prate, *rate, ¶ms))
+ clk_fs660c32_vco_get_rate(*prate, ¶ms, rate);
=20
pr_debug("%s: %s new rate %ld [sdiv=3D0x%x,md=3D0x%x,pe=3D0x%x,nsdiv3=3D%=
u]\n",
__func__, __clk_get_name(hw->clk),
- rate, (unsigned int)params.sdiv,
+ *rate, (unsigned int)params.sdiv,
(unsigned int)params.mdiv,
(unsigned int)params.pe, (unsigned int)params.nsdiv);
=20
- return rate;
+ return 0;
}
=20
static int quadfs_pll_fs660c32_set_rate(struct clk_hw *hw, unsigned long r=
ate,
@@ -953,19 +954,19 @@ static unsigned long quadfs_recalc_rate(struct clk_hw=
*hw,
return rate;
}
=20
-static long quadfs_round_rate(struct clk_hw *hw, unsigned long rate,
+static int quadfs_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct stm_fs params;
=20
- rate =3D quadfs_find_best_rate(hw, rate, *prate, ¶ms);
+ *rate =3D quadfs_find_best_rate(hw, *rate, *prate, ¶ms);
=20
pr_debug("%s: %s new rate %ld [sdiv=3D0x%x,md=3D0x%x,pe=3D0x%x,nsdiv3=3D%=
u]\n",
__func__, __clk_get_name(hw->clk),
- rate, (unsigned int)params.sdiv, (unsigned int)params.mdiv,
+ *rate, (unsigned int)params.sdiv, (unsigned int)params.mdiv,
(unsigned int)params.pe, (unsigned int)params.nsdiv);
=20
- return rate;
+ return 0;
}
=20
=20
diff --git a/drivers/clk/st/clkgen-mux.c b/drivers/clk/st/clkgen-mux.c
index 9a15ec3..2bbcb7b 100644
--- a/drivers/clk/st/clkgen-mux.c
+++ b/drivers/clk/st/clkgen-mux.c
@@ -190,7 +190,7 @@ static int clkgena_divmux_set_rate(struct clk_hw *hw, u=
nsigned long rate,
return clk_divider_ops.set_rate(div_hw, rate, parent_rate);
}
=20
-static long clkgena_divmux_round_rate(struct clk_hw *hw, unsigned long rat=
e,
+static int clkgena_divmux_round_rate(struct clk_hw *hw, unsigned long *rat=
e,
unsigned long *prate)
{
struct clkgena_divmux *genamux =3D to_clkgena_divmux(hw);
diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factor=
s.c
index 8c20190..5865300 100644
--- a/drivers/clk/sunxi/clk-factors.c
+++ b/drivers/clk/sunxi/clk-factors.c
@@ -69,14 +69,17 @@ static unsigned long clk_factors_recalc_rate(struct clk=
_hw *hw,
return rate;
}
=20
-static long clk_factors_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_factors_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct clk_factors *factors =3D to_clk_factors(hw);
- factors->get_factors((u32 *)&rate, (u32)*parent_rate,
+ u32 tmp_rate =3D *rate;
+
+ factors->get_factors(&tmp_rate, (u32)*parent_rate,
NULL, NULL, NULL, NULL);
=20
- return rate;
+ *rate =3D tmp_rate;
+ return 0;
}
=20
static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long ra=
te,
@@ -100,7 +103,8 @@ static long clk_factors_determine_rate(struct clk_hw *h=
w, unsigned long rate,
else
parent_rate =3D __clk_get_rate(parent);
=20
- child_rate =3D clk_factors_round_rate(hw, rate, &parent_rate);
+ child_rate =3D rate;
+ clk_factors_round_rate(hw, &child_rate, &parent_rate);
=20
if (child_rate <=3D rate && child_rate > best_child_rate) {
best_parent =3D parent;
diff --git a/drivers/clk/tegra/clk-audio-sync.c b/drivers/clk/tegra/clk-aud=
io-sync.c
index c0f7843..0224256 100644
--- a/drivers/clk/tegra/clk-audio-sync.c
+++ b/drivers/clk/tegra/clk-audio-sync.c
@@ -28,15 +28,15 @@ static unsigned long clk_sync_source_recalc_rate(struct=
clk_hw *hw,
return sync->rate;
}
=20
-static long clk_sync_source_round_rate(struct clk_hw *hw, unsigned long ra=
te,
- unsigned long *prate)
+static int clk_sync_source_round_rate(struct clk_hw *hw, unsigned long *ra=
te,
+ unsigned long *prate)
{
struct tegra_clk_sync_source *sync =3D to_clk_sync_source(hw);
=20
- if (rate > sync->max_rate)
+ if (*rate > sync->max_rate)
return -EINVAL;
else
- return rate;
+ return 0;
}
=20
static int clk_sync_source_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/tegra/clk-divider.c b/drivers/clk/tegra/clk-divide=
r.c
index 59a5714..9e5ca82 100644
--- a/drivers/clk/tegra/clk-divider.c
+++ b/drivers/clk/tegra/clk-divider.c
@@ -85,23 +85,28 @@ static unsigned long clk_frac_div_recalc_rate(struct cl=
k_hw *hw,
return rate;
}
=20
-static long clk_frac_div_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_frac_div_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_frac_div *divider =3D to_clk_frac_div(hw);
int div, mul;
unsigned long output_rate =3D *prate;
=20
- if (!rate)
- return output_rate;
+ if (!*rate) {
+ *rate =3D output_rate;
+ return 0;
+ }
=20
- div =3D get_div(divider, rate, output_rate);
- if (div < 0)
- return *prate;
+ div =3D get_div(divider, *rate, output_rate);
+ if (div < 0) {
+ *rate =3D *prate;
+ return 0;
+ }
=20
mul =3D get_mul(divider);
=20
- return DIV_ROUND_UP(output_rate * mul, div + mul);
+ *rate =3D DIV_ROUND_UP(output_rate * mul, div + mul);
+ return 0;
}
=20
static int clk_frac_div_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/tegra/clk-periph.c b/drivers/clk/tegra/clk-periph.=
c
index d84ae49..5a262f5 100644
--- a/drivers/clk/tegra/clk-periph.c
+++ b/drivers/clk/tegra/clk-periph.c
@@ -56,8 +56,8 @@ static unsigned long clk_periph_recalc_rate(struct clk_hw=
*hw,
return div_ops->recalc_rate(div_hw, parent_rate);
}
=20
-static long clk_periph_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_periph_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct tegra_clk_periph *periph =3D to_clk_periph(hw);
const struct clk_ops *div_ops =3D periph->div_ops;
diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c
index bfef9ab..a73bdb3 100644
--- a/drivers/clk/tegra/clk-pll.c
+++ b/drivers/clk/tegra/clk-pll.c
@@ -623,24 +623,29 @@ static int clk_pll_set_rate(struct clk_hw *hw, unsign=
ed long rate,
return ret;
}
=20
-static long clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_pll *pll =3D to_clk_pll(hw);
struct tegra_clk_pll_freq_table cfg;
=20
- if (pll->params->flags & TEGRA_PLL_FIXED)
- return pll->params->fixed_rate;
+ if (pll->params->flags & TEGRA_PLL_FIXED) {
+ *rate =3D pll->params->fixed_rate;
+ return 0;
+ }
=20
/* PLLM is used for memory; we do not change rate */
- if (pll->params->flags & TEGRA_PLLM)
- return __clk_get_rate(hw->clk);
+ if (pll->params->flags & TEGRA_PLLM) {
+ *rate =3D __clk_get_rate(hw->clk);
+ return 0;
+ }
=20
- if (_get_table_rate(hw, &cfg, rate, *prate) &&
- _calc_rate(hw, &cfg, rate, *prate))
+ if (_get_table_rate(hw, &cfg, *rate, *prate) &&
+ _calc_rate(hw, &cfg, *rate, *prate))
return -EINVAL;
=20
- return cfg.output_rate;
+ *rate =3D cfg.output_rate;
+ return 0;
}
=20
static unsigned long clk_pll_recalc_rate(struct clk_hw *hw,
@@ -1001,25 +1006,28 @@ static int clk_pllxc_set_rate(struct clk_hw *hw, un=
signed long rate,
return ret;
}
=20
-static long clk_pll_ramp_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pll_ramp_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_pll_freq_table cfg;
int ret =3D 0, p_div;
u64 output_rate =3D *prate;
=20
- ret =3D _pll_ramp_calc_pll(hw, &cfg, rate, *prate);
+ ret =3D _pll_ramp_calc_pll(hw, &cfg, *rate, *prate);
if (ret < 0)
return ret;
=20
p_div =3D _hw_to_p_div(hw, cfg.p);
- if (p_div < 0)
- return p_div;
+ if (p_div < 0) {
+ *rate =3D p_div;
+ return 0;
+ }
=20
output_rate *=3D cfg.n;
do_div(output_rate, cfg.m * p_div);
=20
- return output_rate;
+ *rate =3D output_rate;
+ return 0;
}
=20
static int clk_pllm_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -1272,12 +1280,13 @@ static unsigned long clk_pllre_recalc_rate(struct c=
lk_hw *hw,
return rate;
}
=20
-static long clk_pllre_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pllre_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_pll *pll =3D to_clk_pll(hw);
=20
- return _pllre_calc_rate(pll, NULL, rate, *prate);
+ *rate =3D _pllre_calc_rate(pll, NULL, *rate, *prate);
+ return 0;
}
=20
static int clk_plle_tegra114_enable(struct clk_hw *hw)
diff --git a/drivers/clk/ti/clk-dra7-atl.c b/drivers/clk/ti/clk-dra7-atl.c
index 59bb4b3..cdf1d17 100644
--- a/drivers/clk/ti/clk-dra7-atl.c
+++ b/drivers/clk/ti/clk-dra7-atl.c
@@ -124,16 +124,17 @@ static unsigned long atl_clk_recalc_rate(struct clk_h=
w *hw,
return parent_rate / cdesc->divider;
}
=20
-static long atl_clk_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int atl_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned divider;
=20
- divider =3D (*parent_rate + rate / 2) / rate;
+ divider =3D (*parent_rate + *rate / 2) / *rate;
if (divider > DRA7_ATL_DIVIDER_MASK + 1)
divider =3D DRA7_ATL_DIVIDER_MASK + 1;
=20
- return *parent_rate / divider;
+ *rate =3D *parent_rate / divider;
+ return 0;
}
=20
static int atl_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/ti/composite.c b/drivers/clk/ti/composite.c
index 3654f61..eddad41 100644
--- a/drivers/clk/ti/composite.c
+++ b/drivers/clk/ti/composite.c
@@ -36,8 +36,8 @@ static unsigned long ti_composite_recalc_rate(struct clk_=
hw *hw,
return ti_clk_divider_ops.recalc_rate(hw, parent_rate);
}
=20
-static long ti_composite_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int ti_composite_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
return -EINVAL;
}
diff --git a/drivers/clk/ti/divider.c b/drivers/clk/ti/divider.c
index ff5f117..6044251 100644
--- a/drivers/clk/ti/divider.c
+++ b/drivers/clk/ti/divider.c
@@ -200,13 +200,14 @@ static int ti_clk_divider_bestdiv(struct clk_hw *hw, =
unsigned long rate,
return bestdiv;
}
=20
-static long ti_clk_divider_round_rate(struct clk_hw *hw, unsigned long rat=
e,
- unsigned long *prate)
+static int ti_clk_divider_round_rate(struct clk_hw *hw, unsigned long *rat=
e,
+ unsigned long *prate)
{
int div;
- div =3D ti_clk_divider_bestdiv(hw, rate, prate);
+ div =3D ti_clk_divider_bestdiv(hw, *rate, prate);
=20
- return DIV_ROUND_UP(*prate, div);
+ *rate =3D DIV_ROUND_UP(*prate, div);
+ return 0;
}
=20
static int ti_clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/ux500/clk-prcmu.c b/drivers/clk/ux500/clk-prcmu.c
index bf63c96..1e1aa2d 100644
--- a/drivers/clk/ux500/clk-prcmu.c
+++ b/drivers/clk/ux500/clk-prcmu.c
@@ -80,11 +80,18 @@ static unsigned long clk_prcmu_recalc_rate(struct clk_h=
w *hw,
return prcmu_clock_rate(clk->cg_sel);
}
=20
-static long clk_prcmu_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_prcmu_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct clk_prcmu *clk =3D to_clk_prcmu(hw);
- return prcmu_round_clock_rate(clk->cg_sel, rate);
+ long ret;
+
+ ret =3D prcmu_round_clock_rate(clk->cg_sel, *rate);
+ if (ret < 0)
+ return ret;
+
+ *rate =3D ret;
+ return 0;
}
=20
static int clk_prcmu_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/versatile/clk-icst.c b/drivers/clk/versatile/clk-i=
cst.c
index bc96f10..6404e61 100644
--- a/drivers/clk/versatile/clk-icst.c
+++ b/drivers/clk/versatile/clk-icst.c
@@ -91,14 +91,15 @@ static unsigned long icst_recalc_rate(struct clk_hw *hw=
,
return icst->rate;
}
=20
-static long icst_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int icst_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_icst *icst =3D to_icst(hw);
struct icst_vco vco;
=20
- vco =3D icst_hz_to_vco(icst->params, rate);
- return icst_hz(icst->params, vco);
+ vco =3D icst_hz_to_vco(icst->params, *rate);
+ *rate =3D icst_hz(icst->params, vco);
+ return 0;
}
=20
static int icst_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/versatile/clk-vexpress-osc.c b/drivers/clk/versati=
le/clk-vexpress-osc.c
index 765f1e0..b507758 100644
--- a/drivers/clk/versatile/clk-vexpress-osc.c
+++ b/drivers/clk/versatile/clk-vexpress-osc.c
@@ -39,18 +39,18 @@ static unsigned long vexpress_osc_recalc_rate(struct cl=
k_hw *hw,
return rate;
}
=20
-static long vexpress_osc_round_rate(struct clk_hw *hw, unsigned long rate,
+static int vexpress_osc_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
struct vexpress_osc *osc =3D to_vexpress_osc(hw);
=20
- if (WARN_ON(osc->rate_min && rate < osc->rate_min))
- rate =3D osc->rate_min;
+ if (WARN_ON(osc->rate_min && *rate < osc->rate_min))
+ *rate =3D osc->rate_min;
=20
- if (WARN_ON(osc->rate_max && rate > osc->rate_max))
- rate =3D osc->rate_max;
+ if (WARN_ON(osc->rate_max && *rate > osc->rate_max))
+ *rate =3D osc->rate_max;
=20
- return rate;
+ return 0;
}
=20
static int vexpress_osc_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/zynq/pll.c b/drivers/clk/zynq/pll.c
index 00d72fb..b62d298 100644
--- a/drivers/clk/zynq/pll.c
+++ b/drivers/clk/zynq/pll.c
@@ -60,18 +60,19 @@ struct zynq_pll {
* @prate: Clock frequency of parent clock
* Returns frequency closest to @rate the hardware can generate.
*/
-static long zynq_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int zynq_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
u32 fbdiv;
=20
- fbdiv =3D DIV_ROUND_CLOSEST(rate, *prate);
+ fbdiv =3D DIV_ROUND_CLOSEST(*rate, *prate);
if (fbdiv < PLL_FBDIV_MIN)
fbdiv =3D PLL_FBDIV_MIN;
else if (fbdiv > PLL_FBDIV_MAX)
fbdiv =3D PLL_FBDIV_MAX;
=20
- return *prate * fbdiv;
+ *rate =3D *prate * fbdiv;
+ return 0;
}
=20
/**
diff --git a/drivers/gpu/drm/imx/imx-tve.c b/drivers/gpu/drm/imx/imx-tve.c
index 4216e47..0695428 100644
--- a/drivers/gpu/drm/imx/imx-tve.c
+++ b/drivers/gpu/drm/imx/imx-tve.c
@@ -423,17 +423,20 @@ static unsigned long clk_tve_di_recalc_rate(struct cl=
k_hw *hw,
return 0;
}
=20
-static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_tve_di_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long div;
=20
- div =3D *prate / rate;
+ div =3D *prate / *rate;
if (div >=3D 4)
- return *prate / 4;
+ *rate =3D *prate / 4;
else if (div >=3D 2)
- return *prate / 2;
- return *prate;
+ *rate =3D *prate / 2;
+ else
+ *rate =3D *prate;
+
+ return 0;
}
=20
static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c b/drivers/gpu/drm/msm=
/hdmi/hdmi_phy_8960.c
index eeed006..97cdcb4 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c
@@ -336,11 +336,12 @@ static unsigned long hdmi_pll_recalc_rate(struct clk_=
hw *hw,
return phy_8960->pixclk;
}
=20
-static long hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int hdmi_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- const struct pll_rate *pll_rate =3D find_rate(rate);
- return pll_rate->rate;
+ const struct pll_rate *pll_rate =3D find_rate(*rate);
+ *rate =3D pll_rate->rate;
+ return 0;
}
=20
static int hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c b/drivers/gpu/drm=
/msm/mdp/mdp4/mdp4_lvds_pll.c
index ce42459..c89b109 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c
@@ -109,11 +109,12 @@ static unsigned long mpd4_lvds_pll_recalc_rate(struct=
clk_hw *hw,
return lvds_pll->pixclk;
}
=20
-static long mpd4_lvds_pll_round_rate(struct clk_hw *hw, unsigned long rate=
,
+static int mpd4_lvds_pll_round_rate(struct clk_hw *hw, unsigned long *rate=
,
unsigned long *parent_rate)
{
- const struct pll_rate *pll_rate =3D find_rate(rate);
- return pll_rate->rate;
+ const struct pll_rate *pll_rate =3D find_rate(*rate);
+ *rate =3D pll_rate->rate;
+ return 0;
}
=20
static int mpd4_lvds_pll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform=
/omap3isp/isp.c
index deca809..4d5ba85 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -231,11 +231,11 @@ static u32 isp_xclk_calc_divider(unsigned long *rate,=
unsigned long parent_rate)
return divider;
}
=20
-static long isp_xclk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int isp_xclk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- isp_xclk_calc_divider(&rate, *parent_rate);
- return rate;
+ isp_xclk_calc_divider(rate, *parent_rate);
+ return 0;
}
=20
static int isp_xclk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
index b936bb4..5e6f5a5 100644
--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -316,15 +316,19 @@ static unsigned long hym8563_clkout_recalc_rate(struc=
t clk_hw *hw,
return clkout_rates[ret];
}
=20
-static long hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long rat=
e,
- unsigned long *prate)
+static int hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long *rat=
e,
+ unsigned long *prate)
{
int i;
=20
- for (i =3D 0; i < ARRAY_SIZE(clkout_rates); i++)
- if (clkout_rates[i] <=3D rate)
- return clkout_rates[i];
+ for (i =3D 0; i < ARRAY_SIZE(clkout_rates); i++) {
+ if (clkout_rates[i] <=3D *rate) {
+ *rate =3D clkout_rates[i];
+ return 0;
+ }
+ }
=20
+ *rate =3D 0;
return 0;
}
=20
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 5591ea7..1213b0b 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -173,8 +173,8 @@ struct clk_ops {
void (*disable_unused)(struct clk_hw *hw);
unsigned long (*recalc_rate)(struct clk_hw *hw,
unsigned long parent_rate);
- long (*round_rate)(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate);
+ int (*round_rate)(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate);
long (*determine_rate)(struct clk_hw *hw,
unsigned long rate,
unsigned long min_rate,
@@ -365,7 +365,7 @@ extern const struct clk_ops clk_divider_ops;
unsigned long divider_recalc_rate(struct clk_hw *hw, unsigned long parent_=
rate,
unsigned int val, const struct clk_div_table *table,
unsigned long flags);
-long divider_round_rate(struct clk_hw *hw, unsigned long rate,
+int divider_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate, const struct clk_div_table *table,
u8 width, unsigned long flags);
int divider_get_val(unsigned long rate, unsigned long parent_rate,
diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h
index 6784400..3b2406c 100644
--- a/include/linux/clk/ti.h
+++ b/include/linux/clk/ti.h
@@ -277,9 +277,9 @@ long omap3_noncore_dpll_determine_rate(struct clk_hw *h=
w,
struct clk_hw **best_parent_clk);
unsigned long omap4_dpll_regm4xen_recalc(struct clk_hw *hw,
unsigned long parent_rate);
-long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
- unsigned long target_rate,
- unsigned long *parent_rate);
+int omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
+ unsigned long *target_rate,
+ unsigned long *parent_rate);
long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw,
unsigned long rate,
unsigned long min_rate,
@@ -288,14 +288,14 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw=
*hw,
struct clk_hw **best_parent_clk);
u8 omap2_init_dpll_parent(struct clk_hw *hw);
unsigned long omap3_dpll_recalc(struct clk_hw *hw, unsigned long parent_ra=
te);
-long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
- unsigned long *parent_rate);
+int omap2_dpll_round_rate(struct clk_hw *hw, unsigned long *target_rate,
+ unsigned long *parent_rate);
void omap2_init_clk_clkdm(struct clk_hw *clk);
unsigned long omap3_clkoutx2_recalc(struct clk_hw *hw,
unsigned long parent_rate);
int omap3_clkoutx2_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate);
-long omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long rate,
+int omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate);
int omap2_clkops_enable_clkdm(struct clk_hw *hw);
void omap2_clkops_disable_clkdm(struct clk_hw *hw);
--=20
1.9.1
--=20
--=20
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Please read http://groups.google.com/group/rtc-linux/web/checklist
before submitting a driver.
---=20
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^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
@ 2015-04-17 7:29 ` Boris Brezillon
0 siblings, 0 replies; 18+ messages in thread
From: Boris Brezillon @ 2015-04-17 7:29 UTC (permalink / raw)
To: linux-arm-kernel
Clock rates are stored in an unsigned long field, but ->round_rate()
(which returns a rounded rate from a requested one) returns a long
value (errors are reported using negative error codes), which can lead
to long overflow if the clock rate exceed 2Ghz.
Change ->round_rate() prototype to return 0 or an error code, and pass the
requested rate as a pointer so that it can be adjusted depending on
hardware capabilities.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
CC: Jonathan Corbet <corbet@lwn.net>
CC: Shawn Guo <shawn.guo@linaro.org>
CC: ascha Hauer <kernel@pengutronix.de>
CC: David Brown <davidb@codeaurora.org>
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CC: Bryan Huntsman <bryanh@codeaurora.org>
CC: Tony Lindgren <tony@atomide.com>
CC: Paul Walmsley <paul@pwsan.com>
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CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: Max Filippov <jcmvbkbc@gmail.com>
CC: Heiko Stuebner <heiko@sntech.de>
CC: Sylwester Nawrocki <s.nawrocki@samsung.com>
CC: Tomasz Figa <tomasz.figa@gmail.com>
CC: Barry Song <baohua@kernel.org>
CC: Viresh Kumar <viresh.linux@gmail.com>
CC: "Emilio L?pez" <emilio@elopez.com.ar>
CC: Maxime Ripard <maxime.ripard@free-electrons.com>
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CC: Ulf Hansson <ulf.hansson@linaro.org>
CC: Michal Simek <michal.simek@xilinx.com>
CC: Philipp Zabel <p.zabel@pengutronix.de>
CC: linux-doc at vger.kernel.org
CC: linux-kernel at vger.kernel.org
CC: linux-arm-kernel at lists.infradead.org
CC: linux-arm-msm at vger.kernel.org
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Documentation/clk.txt | 4 +-
arch/arm/mach-imx/clk-busy.c | 2 +-
arch/arm/mach-imx/clk-cpu.c | 12 +++-
arch/arm/mach-imx/clk-fixup-div.c | 2 +-
arch/arm/mach-imx/clk-pfd.c | 11 ++--
arch/arm/mach-imx/clk-pllv2.c | 8 ++-
arch/arm/mach-imx/clk-pllv3.c | 46 +++++++------
arch/arm/mach-msm/clock-pcom.c | 4 +-
arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c | 13 ++--
arch/arm/mach-omap2/clkt_clksel.c | 6 +-
arch/arm/mach-omap2/clkt_dpll.c | 21 +++---
arch/arm/mach-omap2/clock.h | 4 +-
arch/arm/mach-omap2/dpll3xxx.c | 27 +++++---
arch/arm/mach-omap2/dpll44xx.c | 26 +++++---
arch/arm/mach-vexpress/spc.c | 11 +++-
arch/mips/alchemy/common/clock.c | 13 ++--
drivers/clk/at91/clk-h32mx.c | 24 ++++---
drivers/clk/at91/clk-peripheral.c | 31 +++++----
drivers/clk/at91/clk-pll.c | 14 ++--
drivers/clk/at91/clk-plldiv.c | 22 ++++---
drivers/clk/at91/clk-smd.c | 24 ++++---
drivers/clk/at91/clk-usb.c | 34 ++++++----
drivers/clk/clk-axi-clkgen.c | 5 +-
drivers/clk/clk-cdce706.c | 46 ++++++-------
drivers/clk/clk-composite.c | 23 ++++---
drivers/clk/clk-divider.c | 16 +++--
drivers/clk/clk-fixed-factor.c | 7 +-
drivers/clk/clk-fractional-divider.c | 16 +++--
drivers/clk/clk-highbank.c | 18 +++---
drivers/clk/clk-si5351.c | 96 ++++++++++++++--------------
drivers/clk/clk-si570.c | 14 ++--
drivers/clk/clk-u300.c | 65 ++++++++++---------
drivers/clk/clk-vt8500.c | 27 ++++----
drivers/clk/clk-wm831x.c | 11 ++--
drivers/clk/clk-xgene.c | 11 ++--
drivers/clk/clk.c | 15 +++--
drivers/clk/mmp/clk-frac.c | 14 ++--
drivers/clk/mvebu/clk-corediv.c | 7 +-
drivers/clk/mvebu/clk-cpu.c | 9 +--
drivers/clk/mxs/clk-div.c | 4 +-
drivers/clk/mxs/clk-frac.c | 11 ++--
drivers/clk/mxs/clk-ref.c | 11 ++--
drivers/clk/qcom/clk-regmap-divider.c | 4 +-
drivers/clk/rockchip/clk-pll.c | 13 ++--
drivers/clk/samsung/clk-pll.c | 13 ++--
drivers/clk/shmobile/clk-div6.c | 7 +-
drivers/clk/shmobile/clk-rcar-gen2.c | 9 +--
drivers/clk/sirf/clk-common.c | 18 +++---
drivers/clk/spear/clk-aux-synth.c | 10 ++-
drivers/clk/spear/clk-frac-synth.c | 10 ++-
drivers/clk/spear/clk-gpt-synth.c | 10 ++-
drivers/clk/spear/clk-vco-pll.c | 20 ++++--
drivers/clk/st/clk-flexgen.c | 11 ++--
drivers/clk/st/clkgen-fsyn.c | 21 +++---
drivers/clk/st/clkgen-mux.c | 2 +-
drivers/clk/sunxi/clk-factors.c | 14 ++--
drivers/clk/tegra/clk-audio-sync.c | 8 +--
drivers/clk/tegra/clk-divider.c | 19 ++++--
drivers/clk/tegra/clk-periph.c | 4 +-
drivers/clk/tegra/clk-pll.c | 39 ++++++-----
drivers/clk/ti/clk-dra7-atl.c | 9 +--
drivers/clk/ti/composite.c | 4 +-
drivers/clk/ti/divider.c | 9 +--
drivers/clk/ux500/clk-prcmu.c | 13 +++-
drivers/clk/versatile/clk-icst.c | 9 +--
drivers/clk/versatile/clk-vexpress-osc.c | 12 ++--
drivers/clk/zynq/pll.c | 7 +-
drivers/gpu/drm/imx/imx-tve.c | 15 +++--
drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c | 7 +-
drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c | 7 +-
drivers/media/platform/omap3isp/isp.c | 6 +-
drivers/rtc/rtc-hym8563.c | 14 ++--
include/linux/clk-provider.h | 6 +-
include/linux/clk/ti.h | 12 ++--
74 files changed, 672 insertions(+), 475 deletions(-)
diff --git a/Documentation/clk.txt b/Documentation/clk.txt
index 0e4f90a..fca8b7a 100644
--- a/Documentation/clk.txt
+++ b/Documentation/clk.txt
@@ -68,8 +68,8 @@ the operations defined in clk.h:
int (*is_enabled)(struct clk_hw *hw);
unsigned long (*recalc_rate)(struct clk_hw *hw,
unsigned long parent_rate);
- long (*round_rate)(struct clk_hw *hw,
- unsigned long rate,
+ int (*round_rate)(struct clk_hw *hw,
+ unsigned long *rate,
unsigned long *parent_rate);
long (*determine_rate)(struct clk_hw *hw,
unsigned long rate,
diff --git a/arch/arm/mach-imx/clk-busy.c b/arch/arm/mach-imx/clk-busy.c
index 4bb1bc4..f8c67e9 100644
--- a/arch/arm/mach-imx/clk-busy.c
+++ b/arch/arm/mach-imx/clk-busy.c
@@ -51,7 +51,7 @@ static unsigned long clk_busy_divider_recalc_rate(struct clk_hw *hw,
return busy->div_ops->recalc_rate(&busy->div.hw, parent_rate);
}
-static long clk_busy_divider_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_busy_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_busy_divider *busy = to_clk_busy_divider(hw);
diff --git a/arch/arm/mach-imx/clk-cpu.c b/arch/arm/mach-imx/clk-cpu.c
index aa1c345..f6af2d8 100644
--- a/arch/arm/mach-imx/clk-cpu.c
+++ b/arch/arm/mach-imx/clk-cpu.c
@@ -34,12 +34,18 @@ static unsigned long clk_cpu_recalc_rate(struct clk_hw *hw,
return clk_get_rate(cpu->div);
}
-static long clk_cpu_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_cpu_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_cpu *cpu = to_clk_cpu(hw);
+ long ret;
- return clk_round_rate(cpu->pll, rate);
+ ret = clk_round_rate(cpu->pll, *rate);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
}
static int clk_cpu_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/arm/mach-imx/clk-fixup-div.c b/arch/arm/mach-imx/clk-fixup-div.c
index 21db020..c2f4f00 100644
--- a/arch/arm/mach-imx/clk-fixup-div.c
+++ b/arch/arm/mach-imx/clk-fixup-div.c
@@ -48,7 +48,7 @@ static unsigned long clk_fixup_div_recalc_rate(struct clk_hw *hw,
return fixup_div->ops->recalc_rate(&fixup_div->divider.hw, parent_rate);
}
-static long clk_fixup_div_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_fixup_div_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_fixup_div *fixup_div = to_clk_fixup_div(hw);
diff --git a/arch/arm/mach-imx/clk-pfd.c b/arch/arm/mach-imx/clk-pfd.c
index 0b0f6f6..449fb7a 100644
--- a/arch/arm/mach-imx/clk-pfd.c
+++ b/arch/arm/mach-imx/clk-pfd.c
@@ -68,14 +68,14 @@ static unsigned long clk_pfd_recalc_rate(struct clk_hw *hw,
return tmp;
}
-static long clk_pfd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_pfd_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
u64 tmp = *prate;
u8 frac;
- tmp = tmp * 18 + rate / 2;
- do_div(tmp, rate);
+ tmp = tmp * 18 + *rate / 2;
+ do_div(tmp, *rate);
frac = tmp;
if (frac < 12)
frac = 12;
@@ -85,7 +85,8 @@ static long clk_pfd_round_rate(struct clk_hw *hw, unsigned long rate,
tmp *= 18;
do_div(tmp, frac);
- return tmp;
+ *rate = tmp;
+ return 0;
}
static int clk_pfd_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/arm/mach-imx/clk-pllv2.c b/arch/arm/mach-imx/clk-pllv2.c
index 20889d5..6b48bf5 100644
--- a/arch/arm/mach-imx/clk-pllv2.c
+++ b/arch/arm/mach-imx/clk-pllv2.c
@@ -180,14 +180,16 @@ static int clk_pllv2_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
-static long clk_pllv2_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pllv2_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
u32 dp_op, dp_mfd, dp_mfn;
- __clk_pllv2_set_rate(rate, *prate, &dp_op, &dp_mfd, &dp_mfn);
- return __clk_pllv2_recalc_rate(*prate, MXC_PLL_DP_CTL_DPDCK0_2_EN,
+ __clk_pllv2_set_rate(*rate, *prate, &dp_op, &dp_mfd, &dp_mfn);
+ *rate = __clk_pllv2_recalc_rate(*prate, MXC_PLL_DP_CTL_DPDCK0_2_EN,
dp_op, dp_mfd, dp_mfn);
+
+ return 0;
}
static int clk_pllv2_prepare(struct clk_hw *hw)
diff --git a/arch/arm/mach-imx/clk-pllv3.c b/arch/arm/mach-imx/clk-pllv3.c
index 641ebc5..4d8f4eb 100644
--- a/arch/arm/mach-imx/clk-pllv3.c
+++ b/arch/arm/mach-imx/clk-pllv3.c
@@ -104,13 +104,15 @@ static unsigned long clk_pllv3_recalc_rate(struct clk_hw *hw,
return (div == 1) ? parent_rate * 22 : parent_rate * 20;
}
-static long clk_pllv3_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_pllv3_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long parent_rate = *prate;
- return (rate >= parent_rate * 22) ? parent_rate * 22 :
- parent_rate * 20;
+ *rate = (*rate >= parent_rate * 22) ? parent_rate * 22 :
+ parent_rate * 20;
+
+ return 0;
}
static int clk_pllv3_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -151,21 +153,23 @@ static unsigned long clk_pllv3_sys_recalc_rate(struct clk_hw *hw,
return parent_rate * div / 2;
}
-static long clk_pllv3_sys_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_pllv3_sys_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long parent_rate = *prate;
unsigned long min_rate = parent_rate * 54 / 2;
unsigned long max_rate = parent_rate * 108 / 2;
u32 div;
- if (rate > max_rate)
- rate = max_rate;
- else if (rate < min_rate)
- rate = min_rate;
- div = rate * 2 / parent_rate;
+ if (*rate > max_rate)
+ *rate = max_rate;
+ else if (*rate < min_rate)
+ *rate = min_rate;
+ div = *rate * 2 / parent_rate;
- return parent_rate * div / 2;
+ *rate = parent_rate * div / 2;
+
+ return 0;
}
static int clk_pllv3_sys_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -207,7 +211,7 @@ static unsigned long clk_pllv3_av_recalc_rate(struct clk_hw *hw,
return (parent_rate * div) + ((parent_rate / mfd) * mfn);
}
-static long clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
unsigned long parent_rate = *prate;
@@ -217,18 +221,20 @@ static long clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long rate,
u32 mfn, mfd = 1000000;
s64 temp64;
- if (rate > max_rate)
- rate = max_rate;
- else if (rate < min_rate)
- rate = min_rate;
+ if (*rate > max_rate)
+ *rate = max_rate;
+ else if (*rate < min_rate)
+ *rate = min_rate;
- div = rate / parent_rate;
- temp64 = (u64) (rate - div * parent_rate);
+ div = *rate / parent_rate;
+ temp64 = (u64) (*rate - div * parent_rate);
temp64 *= mfd;
do_div(temp64, parent_rate);
mfn = temp64;
- return parent_rate * div + parent_rate / mfd * mfn;
+ *rate = parent_rate * div + parent_rate / mfd * mfn;
+
+ return 0;
}
static int clk_pllv3_av_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/arm/mach-msm/clock-pcom.c b/arch/arm/mach-msm/clock-pcom.c
index f5b69d7..118c288 100644
--- a/arch/arm/mach-msm/clock-pcom.c
+++ b/arch/arm/mach-msm/clock-pcom.c
@@ -109,11 +109,11 @@ static int pc_clk_is_enabled(struct clk_hw *hw)
return id;
}
-static long pc_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int pc_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *p_rate)
{
/* Not really supported; pc_clk_set_rate() does rounding on it's own. */
- return rate;
+ return 0;
}
static struct clk_ops clk_ops_pcom = {
diff --git a/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c b/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
index 85e0b0c0..2829a6f 100644
--- a/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
+++ b/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
@@ -71,8 +71,8 @@ unsigned long omap2_table_mpu_recalc(struct clk_hw *clk,
* Some might argue L3-DDR, others ARM, others IVA. This code is simple and
* just uses the ARM rates.
*/
-long omap2_round_to_table_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+int omap2_round_to_table_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
const struct prcm_config *ptr;
long highest_rate;
@@ -88,10 +88,15 @@ long omap2_round_to_table_rate(struct clk_hw *hw, unsigned long rate,
highest_rate = ptr->mpu_speed;
/* Can check only after xtal frequency check */
- if (ptr->mpu_speed <= rate)
+ if (ptr->mpu_speed <= *rate)
break;
}
- return highest_rate;
+
+ if (highest_rate < 0)
+ return highest_rate;
+
+ *rate = highest_rate;
+ return 0;
}
/* Sets basic clocks based on the specified rate */
diff --git a/arch/arm/mach-omap2/clkt_clksel.c b/arch/arm/mach-omap2/clkt_clksel.c
index 7ee2610..b932276 100644
--- a/arch/arm/mach-omap2/clkt_clksel.c
+++ b/arch/arm/mach-omap2/clkt_clksel.c
@@ -385,13 +385,15 @@ unsigned long omap2_clksel_recalc(struct clk_hw *hw, unsigned long parent_rate)
*
* Returns the rounded clock rate or returns 0xffffffff on error.
*/
-long omap2_clksel_round_rate(struct clk_hw *hw, unsigned long target_rate,
+int omap2_clksel_round_rate(struct clk_hw *hw, unsigned long *target_rate,
unsigned long *parent_rate)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
u32 new_div;
- return omap2_clksel_round_rate_div(clk, target_rate, &new_div);
+ *target_rate = omap2_clksel_round_rate_div(clk, *target_rate,
+ &new_div);
+ return 0;
}
/**
diff --git a/arch/arm/mach-omap2/clkt_dpll.c b/arch/arm/mach-omap2/clkt_dpll.c
index f251a14..7dac6b3 100644
--- a/arch/arm/mach-omap2/clkt_dpll.c
+++ b/arch/arm/mach-omap2/clkt_dpll.c
@@ -280,7 +280,7 @@ unsigned long omap2_get_dpll_rate(struct clk_hw_omap *clk)
* (expensive) function again. Returns ~0 if the target rate cannot
* be rounded, or the rounded rate upon success.
*/
-long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
+int omap2_dpll_round_rate(struct clk_hw *hw, unsigned long *target_rate,
unsigned long *parent_rate)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
@@ -295,16 +295,16 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
const char *clk_name;
if (!clk || !clk->dpll_data)
- return ~0;
+ return -EINVAL;
dd = clk->dpll_data;
ref_rate = __clk_get_rate(dd->clk_ref);
clk_name = __clk_get_name(hw->clk);
pr_debug("clock: %s: starting DPLL round_rate, target rate %lu\n",
- clk_name, target_rate);
+ clk_name, *target_rate);
- scaled_rt_rp = target_rate / (ref_rate / DPLL_SCALE_FACTOR);
+ scaled_rt_rp = *target_rate / (ref_rate / DPLL_SCALE_FACTOR);
scaled_max_m = dd->max_multiplier * DPLL_SCALE_FACTOR;
dd->last_rounded_rate = 0;
@@ -330,7 +330,7 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
if (m > scaled_max_m)
break;
- r = _dpll_test_mult(&m, n, &new_rate, target_rate,
+ r = _dpll_test_mult(&m, n, &new_rate, *target_rate,
ref_rate);
/* m can't be set low enough for this n - try with a larger n */
@@ -338,7 +338,7 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
continue;
/* skip rates above our target rate */
- delta = target_rate - new_rate;
+ delta = *target_rate - new_rate;
if (delta < 0)
continue;
@@ -357,14 +357,15 @@ long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
if (prev_min_delta == LONG_MAX) {
pr_debug("clock: %s: cannot round to rate %lu\n",
- clk_name, target_rate);
- return ~0;
+ clk_name, *target_rate);
+ return -EINVAL;
}
dd->last_rounded_m = min_delta_m;
dd->last_rounded_n = min_delta_n;
- dd->last_rounded_rate = target_rate - prev_min_delta;
+ dd->last_rounded_rate = *target_rate - prev_min_delta;
- return dd->last_rounded_rate;
+ *target_rate = dd->last_rounded_rate;
+ return 0;
}
diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h
index a56742f..cfe41b7 100644
--- a/arch/arm/mach-omap2/clock.h
+++ b/arch/arm/mach-omap2/clock.h
@@ -194,8 +194,8 @@ u32 omap2_clksel_round_rate_div(struct clk_hw_omap *clk,
u32 *new_div);
u8 omap2_clksel_find_parent_index(struct clk_hw *hw);
unsigned long omap2_clksel_recalc(struct clk_hw *hw, unsigned long parent_rate);
-long omap2_clksel_round_rate(struct clk_hw *hw, unsigned long target_rate,
- unsigned long *parent_rate);
+int omap2_clksel_round_rate(struct clk_hw *hw, unsigned long *target_rate,
+ unsigned long *parent_rate);
int omap2_clksel_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate);
int omap2_clksel_set_parent(struct clk_hw *hw, u8 field_val);
diff --git a/arch/arm/mach-omap2/dpll3xxx.c b/arch/arm/mach-omap2/dpll3xxx.c
index 44e57ec..7a6fb45 100644
--- a/arch/arm/mach-omap2/dpll3xxx.c
+++ b/arch/arm/mach-omap2/dpll3xxx.c
@@ -480,6 +480,7 @@ long omap3_noncore_dpll_determine_rate(struct clk_hw *hw, unsigned long rate,
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
struct dpll_data *dd;
+ int ret;
if (!hw || !rate)
return -EINVAL;
@@ -492,7 +493,10 @@ long omap3_noncore_dpll_determine_rate(struct clk_hw *hw, unsigned long rate,
(dd->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
*best_parent_clk = __clk_get_hw(dd->clk_bypass);
} else {
- rate = omap2_dpll_round_rate(hw, rate, best_parent_rate);
+ ret = omap2_dpll_round_rate(hw, &rate, best_parent_rate);
+ if (ret)
+ return ret;
+
*best_parent_clk = __clk_get_hw(dd->clk_ref);
}
@@ -768,27 +772,33 @@ int omap3_clkoutx2_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
-long omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long rate,
+int omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
const struct dpll_data *dd;
u32 v;
struct clk_hw_omap *pclk = NULL;
- if (!*prate)
+ if (!*prate) {
+ *rate = 0;
return 0;
+ }
pclk = omap3_find_clkoutx2_dpll(hw);
- if (!pclk)
+ if (!pclk) {
+ *rate = 0;
return 0;
+ }
dd = pclk->dpll_data;
/* TYPE J does not have a clkoutx2 */
if (dd->flags & DPLL_J_TYPE) {
- *prate = __clk_round_rate(__clk_get_parent(pclk->hw.clk), rate);
- return *prate;
+ *prate = __clk_round_rate(__clk_get_parent(pclk->hw.clk),
+ *rate);
+ *rate = *prate;
+ return 0;
}
WARN_ON(!dd->enable_mask);
@@ -803,12 +813,13 @@ long omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long rate,
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
unsigned long best_parent;
- best_parent = (rate / 2);
+ best_parent = (*rate / 2);
*prate = __clk_round_rate(__clk_get_parent(hw->clk),
best_parent);
}
- return *prate * 2;
+ *rate = *prate * 2;
+ return 0;
}
/* OMAP3/4 non-CORE DPLL clkops */
diff --git a/arch/arm/mach-omap2/dpll44xx.c b/arch/arm/mach-omap2/dpll44xx.c
index f231be0..afd3284 100644
--- a/arch/arm/mach-omap2/dpll44xx.c
+++ b/arch/arm/mach-omap2/dpll44xx.c
@@ -146,11 +146,12 @@ unsigned long omap4_dpll_regm4xen_recalc(struct clk_hw *hw,
* M-dividers) upon success, -EINVAL if @clk is null or not a DPLL, or
* ~0 if an error occurred in omap2_dpll_round_rate().
*/
-long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
- unsigned long target_rate,
- unsigned long *parent_rate)
+int omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
+ unsigned long *target_rate,
+ unsigned long *parent_rate)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
+ unsigned long rate = *target_rate;
struct dpll_data *dd;
long r;
@@ -166,7 +167,7 @@ long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
* target rate without using the 4X multiplier.
*/
r = omap2_dpll_round_rate(hw, target_rate, NULL);
- if (r != ~0)
+ if (!r)
goto out;
/*
@@ -174,9 +175,9 @@ long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
* this time see if using the 4X multiplier can help. Enabling the
* 4X multiplier is equivalent to dividing the target rate by 4.
*/
- r = omap2_dpll_round_rate(hw, target_rate / OMAP4430_REGM4XEN_MULT,
- NULL);
- if (r == ~0)
+ rate = *target_rate / OMAP4430_REGM4XEN_MULT;
+ r = omap2_dpll_round_rate(hw, &rate, NULL);
+ if (r)
return r;
dd->last_rounded_rate *= OMAP4430_REGM4XEN_MULT;
@@ -184,8 +185,9 @@ long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
out:
omap4_dpll_lpmode_recalc(dd);
+ *target_rate = dd->last_rounded_rate;
- return dd->last_rounded_rate;
+ return 0;
}
/**
@@ -209,6 +211,7 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw, unsigned long rate,
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
struct dpll_data *dd;
+ int ret;
if (!hw || !rate)
return -EINVAL;
@@ -221,8 +224,11 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw, unsigned long rate,
(dd->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
*best_parent_clk = __clk_get_hw(dd->clk_bypass);
} else {
- rate = omap4_dpll_regm4xen_round_rate(hw, rate,
- best_parent_rate);
+ ret = omap4_dpll_regm4xen_round_rate(hw, &rate,
+ best_parent_rate);
+ if (ret)
+ return ret;
+
*best_parent_clk = __clk_get_hw(dd->clk_ref);
}
diff --git a/arch/arm/mach-vexpress/spc.c b/arch/arm/mach-vexpress/spc.c
index f61158c..774ac3b 100644
--- a/arch/arm/mach-vexpress/spc.c
+++ b/arch/arm/mach-vexpress/spc.c
@@ -507,12 +507,19 @@ static unsigned long spc_recalc_rate(struct clk_hw *hw,
return freq * 1000;
}
-static long spc_round_rate(struct clk_hw *hw, unsigned long drate,
+static int spc_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *parent_rate)
{
struct clk_spc *spc = to_clk_spc(hw);
+ long ret;
- return ve_spc_round_performance(spc->cluster, drate);
+ ret = ve_spc_round_performance(spc->cluster, *drate);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+
+ return 0;
}
static int spc_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/arch/mips/alchemy/common/clock.c b/arch/mips/alchemy/common/clock.c
index 6a98d2c..d697d8f 100644
--- a/arch/mips/alchemy/common/clock.c
+++ b/arch/mips/alchemy/common/clock.c
@@ -202,24 +202,27 @@ static int alchemy_clk_aux_setr(struct clk_hw *hw,
return 0;
}
-static long alchemy_clk_aux_roundr(struct clk_hw *hw,
- unsigned long rate,
+static int alchemy_clk_aux_roundr(struct clk_hw *hw,
+ unsigned long *rate,
unsigned long *parent_rate)
{
struct alchemy_auxpll_clk *a = to_auxpll_clk(hw);
unsigned long mult;
- if (!rate || !*parent_rate)
+ if (!*rate || !*parent_rate) {
+ *rate = 0;
return 0;
+ }
- mult = rate / (*parent_rate);
+ mult = *rate / (*parent_rate);
if (mult && (mult < 7))
mult = 7;
if (mult > a->maxmult)
mult = a->maxmult;
- return (*parent_rate) * mult;
+ *rate = (*parent_rate) * mult;
+ return 0;
}
static struct clk_ops alchemy_clkops_aux = {
diff --git a/drivers/clk/at91/clk-h32mx.c b/drivers/clk/at91/clk-h32mx.c
index 152dcb3..e48f31e 100644
--- a/drivers/clk/at91/clk-h32mx.c
+++ b/drivers/clk/at91/clk-h32mx.c
@@ -49,21 +49,25 @@ static unsigned long clk_sama5d4_h32mx_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
-static long clk_sama5d4_h32mx_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_sama5d4_h32mx_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
- if (rate > *parent_rate)
- return *parent_rate;
- div = *parent_rate / 2;
- if (rate < div)
- return div;
+ if (*rate > *parent_rate) {
+ *rate = *parent_rate;
+ return 0;
+ }
- if (rate - div < *parent_rate - rate)
- return div;
+ div = *parent_rate / 2;
+ if (*rate < div || (*rate - div) < (*parent_rate - *rate)) {
+ *rate = div;
+ return 0;
+ }
- return *parent_rate;
+ *rate = *parent_rate;
+ return 0;
}
static int clk_sama5d4_h32mx_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/at91/clk-peripheral.c b/drivers/clk/at91/clk-peripheral.c
index 597fed4..d990ae0 100644
--- a/drivers/clk/at91/clk-peripheral.c
+++ b/drivers/clk/at91/clk-peripheral.c
@@ -227,9 +227,9 @@ clk_sam9x5_peripheral_recalc_rate(struct clk_hw *hw,
return parent_rate >> periph->div;
}
-static long clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long *parent_rate)
+static int clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
int shift = 0;
unsigned long best_rate;
@@ -238,8 +238,10 @@ static long clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
unsigned long cur_diff;
struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw);
- if (periph->id < PERIPHERAL_ID_MIN || !periph->range.max)
- return *parent_rate;
+ if (periph->id < PERIPHERAL_ID_MIN || !periph->range.max) {
+ *rate = *parent_rate;
+ return 0;
+ }
if (periph->range.max) {
for (; shift < PERIPHERAL_MAX_SHIFT; shift++) {
@@ -249,28 +251,31 @@ static long clk_sam9x5_peripheral_round_rate(struct clk_hw *hw,
}
}
- if (rate >= cur_rate)
- return cur_rate;
+ if (*rate >= cur_rate) {
+ *rate = cur_rate;
+ return 0;
+ }
- best_diff = cur_rate - rate;
+ best_diff = cur_rate - *rate;
best_rate = cur_rate;
for (; shift < PERIPHERAL_MAX_SHIFT; shift++) {
cur_rate = *parent_rate >> shift;
- if (cur_rate < rate)
- cur_diff = rate - cur_rate;
+ if (cur_rate < *rate)
+ cur_diff = *rate - cur_rate;
else
- cur_diff = cur_rate - rate;
+ cur_diff = cur_rate - *rate;
if (cur_diff < best_diff) {
best_diff = cur_diff;
best_rate = cur_rate;
}
- if (!best_diff || cur_rate < rate)
+ if (!best_diff || cur_rate < *rate)
break;
}
- return best_rate;
+ *rate = best_rate;
+ return 0;
}
static int clk_sam9x5_peripheral_set_rate(struct clk_hw *hw,
diff --git a/drivers/clk/at91/clk-pll.c b/drivers/clk/at91/clk-pll.c
index 6ec79db..e7754eb 100644
--- a/drivers/clk/at91/clk-pll.c
+++ b/drivers/clk/at91/clk-pll.c
@@ -260,13 +260,19 @@ static long clk_pll_get_best_div_mul(struct clk_pll *pll, unsigned long rate,
return bestrate;
}
-static long clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct clk_pll *pll = to_clk_pll(hw);
+ long ret;
- return clk_pll_get_best_div_mul(pll, rate, *parent_rate,
- NULL, NULL, NULL);
+ ret = clk_pll_get_best_div_mul(pll, *rate, *parent_rate,
+ NULL, NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
}
static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/at91/clk-plldiv.c b/drivers/clk/at91/clk-plldiv.c
index ea22656..c267214 100644
--- a/drivers/clk/at91/clk-plldiv.c
+++ b/drivers/clk/at91/clk-plldiv.c
@@ -36,21 +36,23 @@ static unsigned long clk_plldiv_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
-static long clk_plldiv_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_plldiv_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
- if (rate > *parent_rate)
- return *parent_rate;
- div = *parent_rate / 2;
- if (rate < div)
- return div;
+ if (*rate > *parent_rate) {
+ *rate = *parent_rate;
+ return 0;
+ }
- if (rate - div < *parent_rate - rate)
- return div;
+ div = *parent_rate / 2;
+ if (*rate < div || (*rate - div) < (*parent_rate - *rate))
+ *rate = div;
+ else
+ *rate = *parent_rate;
- return *parent_rate;
+ return 0;
}
static int clk_plldiv_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/at91/clk-smd.c b/drivers/clk/at91/clk-smd.c
index 144d47e..cd0f6d2 100644
--- a/drivers/clk/at91/clk-smd.c
+++ b/drivers/clk/at91/clk-smd.c
@@ -43,26 +43,32 @@ static unsigned long at91sam9x5_clk_smd_recalc_rate(struct clk_hw *hw,
return parent_rate / (smddiv + 1);
}
-static long at91sam9x5_clk_smd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int at91sam9x5_clk_smd_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
unsigned long bestrate;
unsigned long tmp;
- if (rate >= *parent_rate)
- return *parent_rate;
+ if (*rate >= *parent_rate) {
+ *rate = *parent_rate;
+ return 0;
+ }
- div = *parent_rate / rate;
- if (div > SMD_MAX_DIV)
- return *parent_rate / (SMD_MAX_DIV + 1);
+ div = *parent_rate / *rate;
+ if (div > SMD_MAX_DIV) {
+ *rate = *parent_rate / (SMD_MAX_DIV + 1);
+ return 0;
+ }
bestrate = *parent_rate / div;
tmp = *parent_rate / (div + 1);
- if (bestrate - rate > rate - tmp)
+ if (bestrate - *rate > *rate - tmp)
bestrate = tmp;
- return bestrate;
+ *rate = bestrate;
+ return 0;
}
static int at91sam9x5_clk_smd_set_parent(struct clk_hw *hw, u8 index)
diff --git a/drivers/clk/at91/clk-usb.c b/drivers/clk/at91/clk-usb.c
index a23ac0c..02599e6 100644
--- a/drivers/clk/at91/clk-usb.c
+++ b/drivers/clk/at91/clk-usb.c
@@ -56,22 +56,26 @@ static unsigned long at91sam9x5_clk_usb_recalc_rate(struct clk_hw *hw,
return DIV_ROUND_CLOSEST(parent_rate, (usbdiv + 1));
}
-static long at91sam9x5_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int at91sam9x5_clk_usb_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long div;
- if (!rate)
+ if (!*rate)
return -EINVAL;
- if (rate >= *parent_rate)
- return *parent_rate;
+ if (*rate >= *parent_rate) {
+ *rate = *parent_rate;
+ return 0;
+ }
- div = DIV_ROUND_CLOSEST(*parent_rate, rate);
+ div = DIV_ROUND_CLOSEST(*parent_rate, *rate);
if (div > SAM9X5_USB_MAX_DIV + 1)
div = SAM9X5_USB_MAX_DIV + 1;
- return DIV_ROUND_CLOSEST(*parent_rate, div);
+ *rate = DIV_ROUND_CLOSEST(*parent_rate, div);
+ return 0;
}
static int at91sam9x5_clk_usb_set_parent(struct clk_hw *hw, u8 index)
@@ -235,8 +239,9 @@ static unsigned long at91rm9200_clk_usb_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long at91rm9200_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int at91rm9200_clk_usb_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *parent_rate)
{
struct at91rm9200_clk_usb *usb = to_at91rm9200_clk_usb(hw);
struct clk *parent = __clk_get_parent(hw->clk);
@@ -252,13 +257,13 @@ static long at91rm9200_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
if (!usb->divisors[i])
continue;
- tmp_parent_rate = rate * usb->divisors[i];
+ tmp_parent_rate = *rate * usb->divisors[i];
tmp_parent_rate = __clk_round_rate(parent, tmp_parent_rate);
tmprate = DIV_ROUND_CLOSEST(tmp_parent_rate, usb->divisors[i]);
- if (tmprate < rate)
- tmpdiff = rate - tmprate;
+ if (tmprate < *rate)
+ tmpdiff = *rate - tmprate;
else
- tmpdiff = tmprate - rate;
+ tmpdiff = tmprate - *rate;
if (bestdiff < 0 || bestdiff > tmpdiff) {
bestrate = tmprate;
@@ -270,7 +275,8 @@ static long at91rm9200_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
break;
}
- return bestrate;
+ *rate = bestrate;
+ return 0;
}
static int at91rm9200_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-axi-clkgen.c b/drivers/clk/clk-axi-clkgen.c
index e619285..3509d50 100644
--- a/drivers/clk/clk-axi-clkgen.c
+++ b/drivers/clk/clk-axi-clkgen.c
@@ -405,7 +405,7 @@ static int axi_clkgen_set_rate(struct clk_hw *clk_hw,
return 0;
}
-static long axi_clkgen_round_rate(struct clk_hw *hw, unsigned long rate,
+static int axi_clkgen_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
unsigned int d, m, dout;
@@ -415,7 +415,8 @@ static long axi_clkgen_round_rate(struct clk_hw *hw, unsigned long rate,
if (d == 0 || dout == 0 || m == 0)
return -EINVAL;
- return *parent_rate / d * m / dout;
+ *rate = *parent_rate / d * m / dout;
+ return 0;
}
static unsigned long axi_clkgen_recalc_rate(struct clk_hw *clk_hw,
diff --git a/drivers/clk/clk-cdce706.c b/drivers/clk/clk-cdce706.c
index c386ad2..f110959 100644
--- a/drivers/clk/clk-cdce706.c
+++ b/drivers/clk/clk-cdce706.c
@@ -187,8 +187,8 @@ static unsigned long cdce706_pll_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long cdce706_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cdce706_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct cdce706_hw_data *hwd = to_hw_data(hw);
unsigned long mul, div;
@@ -196,9 +196,9 @@ static long cdce706_pll_round_rate(struct clk_hw *hw, unsigned long rate,
dev_dbg(&hwd->dev_data->client->dev,
"%s, rate: %lu, parent_rate: %lu\n",
- __func__, rate, *parent_rate);
+ __func__, *rate, *parent_rate);
- rational_best_approximation(rate, *parent_rate,
+ rational_best_approximation(*rate, *parent_rate,
CDCE706_PLL_N_MAX, CDCE706_PLL_M_MAX,
&mul, &div);
hwd->mul = mul;
@@ -210,7 +210,8 @@ static long cdce706_pll_round_rate(struct clk_hw *hw, unsigned long rate,
res = (u64)*parent_rate * hwd->mul;
do_div(res, hwd->div);
- return res;
+ *rate = res;
+ return 0;
}
static int cdce706_pll_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -292,8 +293,8 @@ static unsigned long cdce706_divider_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cdce706_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct cdce706_hw_data *hwd = to_hw_data(hw);
struct cdce706_dev_data *cdce = hwd->dev_data;
@@ -301,31 +302,31 @@ static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
dev_dbg(&hwd->dev_data->client->dev,
"%s, rate: %lu, parent_rate: %lu\n",
- __func__, rate, *parent_rate);
+ __func__, *rate, *parent_rate);
- rational_best_approximation(rate, *parent_rate,
+ rational_best_approximation(*rate, *parent_rate,
1, CDCE706_DIVIDER_DIVIDER_MAX,
&mul, &div);
if (!mul)
div = CDCE706_DIVIDER_DIVIDER_MAX;
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
- unsigned long best_diff = rate;
+ unsigned long best_diff = *rate;
unsigned long best_div = 0;
struct clk *gp_clk = cdce->clkin_clk[cdce->clkin[0].parent];
unsigned long gp_rate = gp_clk ? clk_get_rate(gp_clk) : 0;
- for (div = CDCE706_PLL_FREQ_MIN / rate; best_diff &&
- div <= CDCE706_PLL_FREQ_MAX / rate; ++div) {
+ for (div = CDCE706_PLL_FREQ_MIN / *rate; best_diff &&
+ div <= CDCE706_PLL_FREQ_MAX / *rate; ++div) {
unsigned long n, m;
unsigned long diff;
unsigned long div_rate;
u64 div_rate64;
- if (rate * div < CDCE706_PLL_FREQ_MIN)
+ if (*rate * div < CDCE706_PLL_FREQ_MIN)
continue;
- rational_best_approximation(rate * div, gp_rate,
+ rational_best_approximation(*rate * div, gp_rate,
CDCE706_PLL_N_MAX,
CDCE706_PLL_M_MAX,
&n, &m);
@@ -333,7 +334,7 @@ static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
do_div(div_rate64, m);
do_div(div_rate64, div);
div_rate = div_rate64;
- diff = max(div_rate, rate) - min(div_rate, rate);
+ diff = max(div_rate, *rate) - min(div_rate, *rate);
if (diff < best_diff) {
best_diff = diff;
@@ -348,8 +349,8 @@ static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
dev_dbg(&hwd->dev_data->client->dev,
"%s, altering parent rate: %lu -> %lu\n",
- __func__, *parent_rate, rate * div);
- *parent_rate = rate * div;
+ __func__, *parent_rate, *rate * div);
+ *parent_rate = *rate * div;
}
hwd->div = div;
@@ -357,7 +358,8 @@ static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate,
"%s, divider: %d, div: %lu\n",
__func__, hwd->idx, div);
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int cdce706_divider_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -425,11 +427,11 @@ static unsigned long cdce706_clkout_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
-static long cdce706_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cdce706_clkout_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
- *parent_rate = rate;
- return rate;
+ *parent_rate = *rate;
+ return 0;
}
static int cdce706_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c
index 956b7e5..f56a71d 100644
--- a/drivers/clk/clk-composite.c
+++ b/drivers/clk/clk-composite.c
@@ -68,10 +68,10 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
struct clk_hw *mux_hw = composite->mux_hw;
struct clk *parent;
unsigned long parent_rate;
- long tmp_rate, best_rate = 0;
+ unsigned long tmp_rate, best_rate = 0;
unsigned long rate_diff;
unsigned long best_rate_diff = ULONG_MAX;
- int i;
+ int ret, i;
if (rate_hw && rate_ops && rate_ops->determine_rate) {
__clk_hw_set_clk(rate_hw, hw);
@@ -88,8 +88,12 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
*best_parent_p = __clk_get_hw(parent);
*best_parent_rate = __clk_get_rate(parent);
- return rate_ops->round_rate(rate_hw, rate,
- best_parent_rate);
+ ret = rate_ops->round_rate(rate_hw, &rate,
+ best_parent_rate);
+ if (ret)
+ return ret;
+
+ return rate;
}
for (i = 0; i < __clk_get_num_parents(mux_hw->clk); i++) {
@@ -99,9 +103,10 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
parent_rate = __clk_get_rate(parent);
- tmp_rate = rate_ops->round_rate(rate_hw, rate,
- &parent_rate);
- if (tmp_rate < 0)
+ tmp_rate = rate;
+ ret = rate_ops->round_rate(rate_hw, &tmp_rate,
+ &parent_rate);
+ if (ret < 0)
continue;
rate_diff = abs(rate - tmp_rate);
@@ -130,8 +135,8 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
}
}
-static long clk_composite_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_composite_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_composite *composite = to_clk_composite(hw);
const struct clk_ops *rate_ops = composite->rate_ops;
diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index 25006a8..f646a0c 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -329,19 +329,20 @@ static int clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
return bestdiv;
}
-long divider_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate, const struct clk_div_table *table,
- u8 width, unsigned long flags)
+int divider_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate, const struct clk_div_table *table,
+ u8 width, unsigned long flags)
{
int div;
- div = clk_divider_bestdiv(hw, rate, prate, table, width, flags);
+ div = clk_divider_bestdiv(hw, *rate, prate, table, width, flags);
- return DIV_ROUND_UP(*prate, div);
+ *rate = DIV_ROUND_UP(*prate, div);
+ return 0;
}
EXPORT_SYMBOL_GPL(divider_round_rate);
-static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_divider *divider = to_clk_divider(hw);
@@ -352,7 +353,8 @@ static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
bestdiv = readl(divider->reg) >> divider->shift;
bestdiv &= div_mask(divider->width);
bestdiv = _get_div(divider->table, bestdiv, divider->flags);
- return DIV_ROUND_UP(*prate, bestdiv);
+ *rate = DIV_ROUND_UP(*prate, bestdiv);
+ return 0;
}
return divider_round_rate(hw, rate, prate, divider->table,
diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.c
index d9e3f67..ff936d0 100644
--- a/drivers/clk/clk-fixed-factor.c
+++ b/drivers/clk/clk-fixed-factor.c
@@ -36,7 +36,7 @@ static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
return (unsigned long)rate;
}
-static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_factor_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_fixed_factor *fix = to_clk_fixed_factor(hw);
@@ -44,12 +44,13 @@ static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
unsigned long best_parent;
- best_parent = (rate / fix->mult) * fix->div;
+ best_parent = (*rate / fix->mult) * fix->div;
*prate = __clk_round_rate(__clk_get_parent(hw->clk),
best_parent);
}
- return (*prate / fix->div) * fix->mult;
+ *rate = (*prate / fix->div) * fix->mult;
+ return 0;
}
static int clk_factor_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c
index 6aa72d9..1f1ba3e 100644
--- a/drivers/clk/clk-fractional-divider.c
+++ b/drivers/clk/clk-fractional-divider.c
@@ -45,24 +45,26 @@ static unsigned long clk_fd_recalc_rate(struct clk_hw *hw,
return ret;
}
-static long clk_fd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_fd_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_fractional_divider *fd = to_clk_fd(hw);
unsigned maxn = (fd->nmask >> fd->nshift) + 1;
unsigned div;
- if (!rate || rate >= *prate)
- return *prate;
+ if (!*rate || *rate >= *prate) {
+ *rate = *prate;
+ return 0;
+ }
- div = gcd(*prate, rate);
+ div = gcd(*prate, *rate);
while ((*prate / div) > maxn) {
div <<= 1;
- rate <<= 1;
+ *rate <<= 1;
}
- return rate;
+ return 0;
}
static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-highbank.c b/drivers/clk/clk-highbank.c
index 2e7e9d9..f26d1b0 100644
--- a/drivers/clk/clk-highbank.c
+++ b/drivers/clk/clk-highbank.c
@@ -142,15 +142,16 @@ static void clk_pll_calc(unsigned long rate, unsigned long ref_freq,
*pdivf = divf;
}
-static long clk_pll_round_rate(struct clk_hw *hwclk, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_pll_round_rate(struct clk_hw *hwclk, unsigned long *rate,
+ unsigned long *parent_rate)
{
u32 divq, divf;
unsigned long ref_freq = *parent_rate;
- clk_pll_calc(rate, ref_freq, &divq, &divf);
+ clk_pll_calc(*rate, ref_freq, &divq, &divf);
- return (ref_freq * (divf + 1)) / (1 << divq);
+ *rate = (ref_freq * (divf + 1)) / (1 << divq);
+ return 0;
}
static int clk_pll_set_rate(struct clk_hw *hwclk, unsigned long rate,
@@ -239,16 +240,17 @@ static unsigned long clk_periclk_recalc_rate(struct clk_hw *hwclk,
return parent_rate / div;
}
-static long clk_periclk_round_rate(struct clk_hw *hwclk, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_periclk_round_rate(struct clk_hw *hwclk, unsigned long *rate,
+ unsigned long *parent_rate)
{
u32 div;
- div = *parent_rate / rate;
+ div = *parent_rate / *rate;
div++;
div &= ~0x1;
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int clk_periclk_set_rate(struct clk_hw *hwclk, unsigned long rate,
diff --git a/drivers/clk/clk-si5351.c b/drivers/clk/clk-si5351.c
index 3b2a66f..8fad555 100644
--- a/drivers/clk/clk-si5351.c
+++ b/drivers/clk/clk-si5351.c
@@ -446,30 +446,30 @@ static unsigned long si5351_pll_recalc_rate(struct clk_hw *hw,
return (unsigned long)rate;
}
-static long si5351_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int si5351_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct si5351_hw_data *hwdata =
container_of(hw, struct si5351_hw_data, hw);
unsigned long rfrac, denom, a, b, c;
unsigned long long lltmp;
- if (rate < SI5351_PLL_VCO_MIN)
- rate = SI5351_PLL_VCO_MIN;
- if (rate > SI5351_PLL_VCO_MAX)
- rate = SI5351_PLL_VCO_MAX;
+ if (*rate < SI5351_PLL_VCO_MIN)
+ *rate = SI5351_PLL_VCO_MIN;
+ if (*rate > SI5351_PLL_VCO_MAX)
+ *rate = SI5351_PLL_VCO_MAX;
/* determine integer part of feedback equation */
- a = rate / *parent_rate;
+ a = *rate / *parent_rate;
if (a < SI5351_PLL_A_MIN)
- rate = *parent_rate * SI5351_PLL_A_MIN;
+ *rate = *parent_rate * SI5351_PLL_A_MIN;
if (a > SI5351_PLL_A_MAX)
- rate = *parent_rate * SI5351_PLL_A_MAX;
+ *rate = *parent_rate * SI5351_PLL_A_MAX;
/* find best approximation for b/c = fVCO mod fIN */
denom = 1000 * 1000;
- lltmp = rate % (*parent_rate);
+ lltmp = *rate % (*parent_rate);
lltmp *= denom;
do_div(lltmp, *parent_rate);
rfrac = (unsigned long)lltmp;
@@ -492,15 +492,15 @@ static long si5351_pll_round_rate(struct clk_hw *hw, unsigned long rate,
lltmp *= b;
do_div(lltmp, c);
- rate = (unsigned long)lltmp;
- rate += *parent_rate * a;
+ *rate = (unsigned long)lltmp;
+ *rate += *parent_rate * a;
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: a = %lu, b = %lu, c = %lu, parent_rate = %lu, rate = %lu\n",
__func__, __clk_get_name(hwdata->hw.clk), a, b, c,
- *parent_rate, rate);
+ *parent_rate, *rate);
- return rate;
+ return 0;
}
static int si5351_pll_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -639,8 +639,8 @@ static unsigned long si5351_msynth_recalc_rate(struct clk_hw *hw,
return (unsigned long)rate;
}
-static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int si5351_msynth_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct si5351_hw_data *hwdata =
container_of(hw, struct si5351_hw_data, hw);
@@ -649,17 +649,17 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
int divby4;
/* multisync6-7 can only handle freqencies < 150MHz */
- if (hwdata->num >= 6 && rate > SI5351_MULTISYNTH67_MAX_FREQ)
- rate = SI5351_MULTISYNTH67_MAX_FREQ;
+ if (hwdata->num >= 6 && *rate > SI5351_MULTISYNTH67_MAX_FREQ)
+ *rate = SI5351_MULTISYNTH67_MAX_FREQ;
/* multisync frequency is 1MHz .. 160MHz */
- if (rate > SI5351_MULTISYNTH_MAX_FREQ)
- rate = SI5351_MULTISYNTH_MAX_FREQ;
- if (rate < SI5351_MULTISYNTH_MIN_FREQ)
- rate = SI5351_MULTISYNTH_MIN_FREQ;
+ if (*rate > SI5351_MULTISYNTH_MAX_FREQ)
+ *rate = SI5351_MULTISYNTH_MAX_FREQ;
+ if (*rate < SI5351_MULTISYNTH_MIN_FREQ)
+ *rate = SI5351_MULTISYNTH_MIN_FREQ;
divby4 = 0;
- if (rate > SI5351_MULTISYNTH_DIVBY4_FREQ)
+ if (*rate > SI5351_MULTISYNTH_DIVBY4_FREQ)
divby4 = 1;
/* multisync can set pll */
@@ -670,7 +670,7 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
*/
if (divby4 == 0) {
lltmp = SI5351_PLL_VCO_MAX;
- do_div(lltmp, rate);
+ do_div(lltmp, *rate);
a = (unsigned long)lltmp;
} else
a = 4;
@@ -678,18 +678,18 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
b = 0;
c = 1;
- *parent_rate = a * rate;
+ *parent_rate = a * *rate;
} else {
unsigned long rfrac, denom;
/* disable divby4 */
if (divby4) {
- rate = SI5351_MULTISYNTH_DIVBY4_FREQ;
+ *rate = SI5351_MULTISYNTH_DIVBY4_FREQ;
divby4 = 0;
}
/* determine integer part of divider equation */
- a = *parent_rate / rate;
+ a = *parent_rate / *rate;
if (a < SI5351_MULTISYNTH_A_MIN)
a = SI5351_MULTISYNTH_A_MIN;
if (hwdata->num >= 6 && a > SI5351_MULTISYNTH67_A_MAX)
@@ -699,9 +699,9 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
/* find best approximation for b/c = fVCO mod fOUT */
denom = 1000 * 1000;
- lltmp = (*parent_rate) % rate;
+ lltmp = (*parent_rate) % *rate;
lltmp *= denom;
- do_div(lltmp, rate);
+ do_div(lltmp, *rate);
rfrac = (unsigned long)lltmp;
b = 0;
@@ -716,7 +716,7 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
lltmp = *parent_rate;
lltmp *= c;
do_div(lltmp, a * c + b);
- rate = (unsigned long)lltmp;
+ *rate = (unsigned long)lltmp;
/* calculate parameters */
if (divby4) {
@@ -734,9 +734,9 @@ static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: a = %lu, b = %lu, c = %lu, divby4 = %d, parent_rate = %lu, rate = %lu\n",
__func__, __clk_get_name(hwdata->hw.clk), a, b, c, divby4,
- *parent_rate, rate);
+ *parent_rate, *rate);
- return rate;
+ return 0;
}
static int si5351_msynth_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -983,57 +983,57 @@ static unsigned long si5351_clkout_recalc_rate(struct clk_hw *hw,
return parent_rate >> rdiv;
}
-static long si5351_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int si5351_clkout_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct si5351_hw_data *hwdata =
container_of(hw, struct si5351_hw_data, hw);
unsigned char rdiv;
/* clkout6/7 can only handle output freqencies < 150MHz */
- if (hwdata->num >= 6 && rate > SI5351_CLKOUT67_MAX_FREQ)
- rate = SI5351_CLKOUT67_MAX_FREQ;
+ if (hwdata->num >= 6 && *rate > SI5351_CLKOUT67_MAX_FREQ)
+ *rate = SI5351_CLKOUT67_MAX_FREQ;
/* clkout freqency is 8kHz - 160MHz */
- if (rate > SI5351_CLKOUT_MAX_FREQ)
- rate = SI5351_CLKOUT_MAX_FREQ;
- if (rate < SI5351_CLKOUT_MIN_FREQ)
- rate = SI5351_CLKOUT_MIN_FREQ;
+ if (*rate > SI5351_CLKOUT_MAX_FREQ)
+ *rate = SI5351_CLKOUT_MAX_FREQ;
+ if (*rate < SI5351_CLKOUT_MIN_FREQ)
+ *rate = SI5351_CLKOUT_MIN_FREQ;
/* request frequency if multisync master */
if (__clk_get_flags(hwdata->hw.clk) & CLK_SET_RATE_PARENT) {
/* use r divider for frequencies below 1MHz */
rdiv = SI5351_OUTPUT_CLK_DIV_1;
- while (rate < SI5351_MULTISYNTH_MIN_FREQ &&
+ while (*rate < SI5351_MULTISYNTH_MIN_FREQ &&
rdiv < SI5351_OUTPUT_CLK_DIV_128) {
rdiv += 1;
- rate *= 2;
+ *rate *= 2;
}
- *parent_rate = rate;
+ *parent_rate = *rate;
} else {
unsigned long new_rate, new_err, err;
/* round to closed rdiv */
rdiv = SI5351_OUTPUT_CLK_DIV_1;
new_rate = *parent_rate;
- err = abs(new_rate - rate);
+ err = abs(new_rate - *rate);
do {
new_rate >>= 1;
- new_err = abs(new_rate - rate);
+ new_err = abs(new_rate - *rate);
if (new_err > err || rdiv == SI5351_OUTPUT_CLK_DIV_128)
break;
rdiv++;
err = new_err;
} while (1);
}
- rate = *parent_rate >> rdiv;
+ *rate = *parent_rate >> rdiv;
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: rdiv = %u, parent_rate = %lu, rate = %lu\n",
__func__, __clk_get_name(hwdata->hw.clk), (1 << rdiv),
- *parent_rate, rate);
+ *parent_rate, *rate);
- return rate;
+ return 0;
}
static int si5351_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-si570.c b/drivers/clk/clk-si570.c
index fc167b3..0680863 100644
--- a/drivers/clk/clk-si570.c
+++ b/drivers/clk/clk-si570.c
@@ -245,7 +245,7 @@ static unsigned long si570_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long si570_round_rate(struct clk_hw *hw, unsigned long rate,
+static int si570_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
int err;
@@ -253,26 +253,26 @@ static long si570_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned int n1, hs_div;
struct clk_si570 *data = to_clk_si570(hw);
- if (!rate)
+ if (!*rate)
return 0;
- if (div64_u64(abs(rate - data->frequency) * 10000LL,
+ if (div64_u64(abs(*rate - data->frequency) * 10000LL,
data->frequency) < 35) {
- rfreq = div64_u64((data->rfreq * rate) +
+ rfreq = div64_u64((data->rfreq * *rate) +
div64_u64(data->frequency, 2), data->frequency);
n1 = data->n1;
hs_div = data->hs_div;
} else {
- err = si570_calc_divs(rate, data, &rfreq, &n1, &hs_div);
+ err = si570_calc_divs(*rate, data, &rfreq, &n1, &hs_div);
if (err) {
dev_err(&data->i2c_client->dev,
"unable to round rate\n");
- return 0;
+ *rate = 0;
}
}
- return rate;
+ return 0;
}
/**
diff --git a/drivers/clk/clk-u300.c b/drivers/clk/clk-u300.c
index 406bfc1..5e3163b 100644
--- a/drivers/clk/clk-u300.c
+++ b/drivers/clk/clk-u300.c
@@ -628,22 +628,27 @@ syscon_clk_recalc_rate(struct clk_hw *hw,
}
}
-static long
-syscon_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int
+syscon_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_syscon *sclk = to_syscon(hw);
- if (sclk->clk_val != U300_SYSCON_SBCER_CPU_CLK_EN)
- return *prate;
+ if (sclk->clk_val != U300_SYSCON_SBCER_CPU_CLK_EN) {
+ *rate = *prate;
+ return 0;
+ }
/* We really only support setting the rate of the CPU clock */
- if (rate <= 13000000)
- return 13000000;
- if (rate <= 52000000)
- return 52000000;
- if (rate <= 104000000)
- return 104000000;
- return 208000000;
+ if (*rate <= 13000000)
+ *rate = 13000000;
+ else if (*rate <= 52000000)
+ *rate = 52000000;
+ else if (*rate <= 104000000)
+ *rate = 104000000;
+ else
+ *rate = 208000000;
+
+ return 0;
}
static int syscon_clk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -1037,26 +1042,28 @@ mclk_clk_recalc_rate(struct clk_hw *hw,
return parent_rate;
}
-static long
-mclk_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int
+mclk_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
- if (rate <= 18900000)
- return 18900000;
- if (rate <= 20800000)
- return 20800000;
- if (rate <= 23100000)
- return 23100000;
- if (rate <= 26000000)
- return 26000000;
- if (rate <= 29700000)
- return 29700000;
- if (rate <= 34700000)
- return 34700000;
- if (rate <= 41600000)
- return 41600000;
- /* Highest rate */
- return 52000000;
+ if (*rate <= 18900000)
+ *rate = 18900000;
+ else if (*rate <= 20800000)
+ *rate = 20800000;
+ else if (*rate <= 23100000)
+ *rate = 23100000;
+ else if (*rate <= 26000000)
+ *rate = 26000000;
+ else if (*rate <= 29700000)
+ *rate = 29700000;
+ else if (*rate <= 34700000)
+ *rate = 34700000;
+ else if (*rate <= 41600000)
+ *rate = 41600000;
+ else
+ *rate = 52000000;
+
+ return 0;
}
static int mclk_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-vt8500.c b/drivers/clk/clk-vt8500.c
index 37e9288..221eec3 100644
--- a/drivers/clk/clk-vt8500.c
+++ b/drivers/clk/clk-vt8500.c
@@ -137,19 +137,19 @@ static unsigned long vt8500_dclk_recalc_rate(struct clk_hw *hw,
return parent_rate / div;
}
-static long vt8500_dclk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int vt8500_dclk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clk_device *cdev = to_clk_device(hw);
u32 divisor;
- if (rate == 0)
+ if (*rate == 0)
return 0;
- divisor = *prate / rate;
+ divisor = *prate / *rate;
/* If prate / rate would be decimal, incr the divisor */
- if (rate * divisor < *prate)
+ if (*rate * divisor < *prate)
divisor++;
/*
@@ -160,7 +160,8 @@ static long vt8500_dclk_round_rate(struct clk_hw *hw, unsigned long rate,
divisor = 64 * ((divisor / 64) + 1);
}
- return *prate / divisor;
+ *rate = *prate / divisor;
+ return 0;
}
static int vt8500_dclk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -579,8 +580,8 @@ static int vtwm_pll_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
-static long vtwm_pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int vtwm_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_pll *pll = to_clk_pll(hw);
u32 filter, mul, div1, div2;
@@ -588,26 +589,28 @@ static long vtwm_pll_round_rate(struct clk_hw *hw, unsigned long rate,
switch (pll->type) {
case PLL_TYPE_VT8500:
- vt8500_find_pll_bits(rate, *prate, &mul, &div1);
+ vt8500_find_pll_bits(*rate, *prate, &mul, &div1);
round_rate = VT8500_BITS_TO_FREQ(*prate, mul, div1);
break;
case PLL_TYPE_WM8650:
- wm8650_find_pll_bits(rate, *prate, &mul, &div1, &div2);
+ wm8650_find_pll_bits(*rate, *prate, &mul, &div1, &div2);
round_rate = WM8650_BITS_TO_FREQ(*prate, mul, div1, div2);
break;
case PLL_TYPE_WM8750:
- wm8750_find_pll_bits(rate, *prate, &filter, &mul, &div1, &div2);
+ wm8750_find_pll_bits(*rate, *prate, &filter, &mul, &div1,
+ &div2);
round_rate = WM8750_BITS_TO_FREQ(*prate, mul, div1, div2);
break;
case PLL_TYPE_WM8850:
- wm8850_find_pll_bits(rate, *prate, &mul, &div1, &div2);
+ wm8850_find_pll_bits(*rate, *prate, &mul, &div1, &div2);
round_rate = WM8850_BITS_TO_FREQ(*prate, mul, div1, div2);
break;
default:
round_rate = 0;
}
- return round_rate;
+ *rate = round_rate;
+ return 0;
}
static unsigned long vtwm_pll_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/clk-wm831x.c b/drivers/clk/clk-wm831x.c
index ef67719..23db1b5 100644
--- a/drivers/clk/clk-wm831x.c
+++ b/drivers/clk/clk-wm831x.c
@@ -142,18 +142,19 @@ static unsigned long wm831x_fll_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long wm831x_fll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *unused)
+static int wm831x_fll_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *unused)
{
int best = 0;
int i;
for (i = 0; i < ARRAY_SIZE(wm831x_fll_auto_rates); i++)
- if (abs(wm831x_fll_auto_rates[i] - rate) <
- abs(wm831x_fll_auto_rates[best] - rate))
+ if (abs(wm831x_fll_auto_rates[i] - *rate) <
+ abs(wm831x_fll_auto_rates[best] - *rate))
best = i;
- return wm831x_fll_auto_rates[best];
+ *rate = wm831x_fll_auto_rates[best];
+ return 0;
}
static int wm831x_fll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/clk-xgene.c b/drivers/clk/clk-xgene.c
index dd8a62d..27460e3 100644
--- a/drivers/clk/clk-xgene.c
+++ b/drivers/clk/clk-xgene.c
@@ -367,7 +367,7 @@ static int xgene_clk_set_rate(struct clk_hw *hw, unsigned long rate,
return parent_rate / divider_save;
}
-static long xgene_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int xgene_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct xgene_clk *pclk = to_xgene_clk(hw);
@@ -376,14 +376,15 @@ static long xgene_clk_round_rate(struct clk_hw *hw, unsigned long rate,
if (pclk->param.divider_reg) {
/* Let's compute the divider */
- if (rate > parent_rate)
- rate = parent_rate;
- divider = parent_rate / rate; /* Rounded down */
+ if (*rate > parent_rate)
+ *rate = parent_rate;
+ divider = parent_rate / *rate; /* Rounded down */
} else {
divider = 1;
}
- return parent_rate / divider;
+ *rate = parent_rate / divider;
+ return 0;
}
const struct clk_ops xgene_clk_ops = {
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index fa5a00e..1462ddc 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1146,9 +1146,12 @@ static unsigned long clk_core_round_rate_nolock(struct clk_core *clk,
return clk->ops->determine_rate(clk->hw, rate,
min_rate, max_rate,
&parent_rate, &parent_hw);
- } else if (clk->ops->round_rate)
- return clk->ops->round_rate(clk->hw, rate, &parent_rate);
- else if (clk->flags & CLK_SET_RATE_PARENT)
+ } else if (clk->ops->round_rate) {
+ if (clk->ops->round_rate(clk->hw, &rate, &parent_rate))
+ return 0;
+
+ return rate;
+ } else if (clk->flags & CLK_SET_RATE_PARENT)
return clk_core_round_rate_nolock(clk->parent, rate, min_rate,
max_rate);
else
@@ -1640,8 +1643,10 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *clk,
&parent_hw);
parent = parent_hw ? parent_hw->core : NULL;
} else if (clk->ops->round_rate) {
- new_rate = clk->ops->round_rate(clk->hw, rate,
- &best_parent_rate);
+ if (clk->ops->round_rate(clk->hw, &new_rate,
+ &best_parent_rate))
+ return NULL;
+
if (new_rate < min_rate || new_rate > max_rate)
return NULL;
} else if (!parent || !(clk->flags & CLK_SET_RATE_PARENT)) {
diff --git a/drivers/clk/mmp/clk-frac.c b/drivers/clk/mmp/clk-frac.c
index 584a992..6652983 100644
--- a/drivers/clk/mmp/clk-frac.c
+++ b/drivers/clk/mmp/clk-frac.c
@@ -24,7 +24,7 @@
#define to_clk_factor(hw) container_of(hw, struct mmp_clk_factor, hw)
-static long clk_factor_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_factor_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct mmp_clk_factor *factor = to_clk_factor(hw);
@@ -35,17 +35,19 @@ static long clk_factor_round_rate(struct clk_hw *hw, unsigned long drate,
prev_rate = rate;
rate = (((*prate / 10000) * factor->ftbl[i].den) /
(factor->ftbl[i].num * factor->masks->factor)) * 10000;
- if (rate > drate)
+ if (rate > *drate)
break;
}
if ((i == 0) || (i == factor->ftbl_cnt)) {
- return rate;
+ *drate = rate;
} else {
- if ((drate - prev_rate) > (rate - drate))
- return rate;
+ if ((*drate - prev_rate) > (rate - *drate))
+ *drate = rate;
else
- return prev_rate;
+ *drate = prev_rate;
}
+
+ return 0;
}
static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/mvebu/clk-corediv.c b/drivers/clk/mvebu/clk-corediv.c
index d1e5863..c5aee2f 100644
--- a/drivers/clk/mvebu/clk-corediv.c
+++ b/drivers/clk/mvebu/clk-corediv.c
@@ -132,19 +132,20 @@ static unsigned long clk_corediv_recalc_rate(struct clk_hw *hwclk,
return parent_rate / div;
}
-static long clk_corediv_round_rate(struct clk_hw *hwclk, unsigned long rate,
+static int clk_corediv_round_rate(struct clk_hw *hwclk, unsigned long *rate,
unsigned long *parent_rate)
{
/* Valid ratio are 1:4, 1:5, 1:6 and 1:8 */
u32 div;
- div = *parent_rate / rate;
+ div = *parent_rate / *rate;
if (div < 4)
div = 4;
else if (div > 6)
div = 8;
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int clk_corediv_set_rate(struct clk_hw *hwclk, unsigned long rate,
diff --git a/drivers/clk/mvebu/clk-cpu.c b/drivers/clk/mvebu/clk-cpu.c
index 3821a88..0279b50 100644
--- a/drivers/clk/mvebu/clk-cpu.c
+++ b/drivers/clk/mvebu/clk-cpu.c
@@ -57,19 +57,20 @@ static unsigned long clk_cpu_recalc_rate(struct clk_hw *hwclk,
return parent_rate / div;
}
-static long clk_cpu_round_rate(struct clk_hw *hwclk, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_cpu_round_rate(struct clk_hw *hwclk, unsigned long *rate,
+ unsigned long *parent_rate)
{
/* Valid ratio are 1:1, 1:2 and 1:3 */
u32 div;
- div = *parent_rate / rate;
+ div = *parent_rate / *rate;
if (div == 0)
div = 1;
else if (div > 3)
div = 3;
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int clk_cpu_off_set_rate(struct clk_hw *hwclk, unsigned long rate,
diff --git a/drivers/clk/mxs/clk-div.c b/drivers/clk/mxs/clk-div.c
index 90e1da9..3677e51 100644
--- a/drivers/clk/mxs/clk-div.c
+++ b/drivers/clk/mxs/clk-div.c
@@ -47,8 +47,8 @@ static unsigned long clk_div_recalc_rate(struct clk_hw *hw,
return div->ops->recalc_rate(&div->divider.hw, parent_rate);
}
-static long clk_div_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_div_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_div *div = to_clk_div(hw);
diff --git a/drivers/clk/mxs/clk-frac.c b/drivers/clk/mxs/clk-frac.c
index e6aa6b5..86fc3bb 100644
--- a/drivers/clk/mxs/clk-frac.c
+++ b/drivers/clk/mxs/clk-frac.c
@@ -49,18 +49,18 @@ static unsigned long clk_frac_recalc_rate(struct clk_hw *hw,
return (parent_rate >> frac->width) * div;
}
-static long clk_frac_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_frac_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_frac *frac = to_clk_frac(hw);
unsigned long parent_rate = *prate;
u32 div;
u64 tmp;
- if (rate > parent_rate)
+ if (*rate > parent_rate)
return -EINVAL;
- tmp = rate;
+ tmp = *rate;
tmp <<= frac->width;
do_div(tmp, parent_rate);
div = tmp;
@@ -68,7 +68,8 @@ static long clk_frac_round_rate(struct clk_hw *hw, unsigned long rate,
if (!div)
return -EINVAL;
- return (parent_rate >> frac->width) * div;
+ *rate = (parent_rate >> frac->width) * div;
+ return 0;
}
static int clk_frac_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/mxs/clk-ref.c b/drivers/clk/mxs/clk-ref.c
index 4adeed6..e0d6529 100644
--- a/drivers/clk/mxs/clk-ref.c
+++ b/drivers/clk/mxs/clk-ref.c
@@ -64,15 +64,15 @@ static unsigned long clk_ref_recalc_rate(struct clk_hw *hw,
return tmp;
}
-static long clk_ref_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_ref_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long parent_rate = *prate;
u64 tmp = parent_rate;
u8 frac;
- tmp = tmp * 18 + rate / 2;
- do_div(tmp, rate);
+ tmp = tmp * 18 + *rate / 2;
+ do_div(tmp, *rate);
frac = tmp;
if (frac < 18)
@@ -83,8 +83,9 @@ static long clk_ref_round_rate(struct clk_hw *hw, unsigned long rate,
tmp = parent_rate;
tmp *= 18;
do_div(tmp, frac);
+ *rate = tmp;
- return tmp;
+ return 0;
}
static int clk_ref_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/qcom/clk-regmap-divider.c b/drivers/clk/qcom/clk-regmap-divider.c
index 5348491..1720da4 100644
--- a/drivers/clk/qcom/clk-regmap-divider.c
+++ b/drivers/clk/qcom/clk-regmap-divider.c
@@ -23,8 +23,8 @@ static inline struct clk_regmap_div *to_clk_regmap_div(struct clk_hw *hw)
return container_of(to_clk_regmap(hw), struct clk_regmap_div, clkr);
}
-static long div_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int div_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_regmap_div *divider = to_clk_regmap_div(hw);
diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
index f8d3baf..bd408ef 100644
--- a/drivers/clk/rockchip/clk-pll.c
+++ b/drivers/clk/rockchip/clk-pll.c
@@ -63,8 +63,8 @@ static const struct rockchip_pll_rate_table *rockchip_get_pll_settings(
return NULL;
}
-static long rockchip_pll_round_rate(struct clk_hw *hw,
- unsigned long drate, unsigned long *prate)
+static int rockchip_pll_round_rate(struct clk_hw *hw,
+ unsigned long *drate, unsigned long *prate)
{
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
const struct rockchip_pll_rate_table *rate_table = pll->rate_table;
@@ -72,12 +72,15 @@ static long rockchip_pll_round_rate(struct clk_hw *hw,
/* Assumming rate_table is in descending order */
for (i = 0; i < pll->rate_count; i++) {
- if (drate >= rate_table[i].rate)
- return rate_table[i].rate;
+ if (*drate >= rate_table[i].rate) {
+ *drate = rate_table[i].rate;
+ return 0;
+ }
}
/* return minimum supported value */
- return rate_table[i - 1].rate;
+ *drate = rate_table[i - 1].rate;
+ return 0;
}
/*
diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c
index 9d70e5c..0128de2 100644
--- a/drivers/clk/samsung/clk-pll.c
+++ b/drivers/clk/samsung/clk-pll.c
@@ -42,8 +42,8 @@ static const struct samsung_pll_rate_table *samsung_get_pll_settings(
return NULL;
}
-static long samsung_pll_round_rate(struct clk_hw *hw,
- unsigned long drate, unsigned long *prate)
+static int samsung_pll_round_rate(struct clk_hw *hw,
+ unsigned long *drate, unsigned long *prate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
const struct samsung_pll_rate_table *rate_table = pll->rate_table;
@@ -51,12 +51,15 @@ static long samsung_pll_round_rate(struct clk_hw *hw,
/* Assumming rate_table is in descending order */
for (i = 0; i < pll->rate_count; i++) {
- if (drate >= rate_table[i].rate)
- return rate_table[i].rate;
+ if (*drate >= rate_table[i].rate) {
+ *drate = rate_table[i].rate;
+ return 0;
+ }
}
/* return minimum supported value */
- return rate_table[i - 1].rate;
+ *drate = rate_table[i - 1].rate;
+ return 0;
}
/*
diff --git a/drivers/clk/shmobile/clk-div6.c b/drivers/clk/shmobile/clk-div6.c
index 036a692..d31ae3d 100644
--- a/drivers/clk/shmobile/clk-div6.c
+++ b/drivers/clk/shmobile/clk-div6.c
@@ -97,12 +97,13 @@ static unsigned int cpg_div6_clock_calc_div(unsigned long rate,
return clamp_t(unsigned int, div, 1, 64);
}
-static long cpg_div6_clock_round_rate(struct clk_hw *hw, unsigned long rate,
+static int cpg_div6_clock_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- unsigned int div = cpg_div6_clock_calc_div(rate, *parent_rate);
+ unsigned int div = cpg_div6_clock_calc_div(*rate, *parent_rate);
- return *parent_rate / div;
+ *rate = *parent_rate / div;
+ return 0;
}
static int cpg_div6_clock_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/shmobile/clk-rcar-gen2.c b/drivers/clk/shmobile/clk-rcar-gen2.c
index acfb6d7..57581a9 100644
--- a/drivers/clk/shmobile/clk-rcar-gen2.c
+++ b/drivers/clk/shmobile/clk-rcar-gen2.c
@@ -68,8 +68,8 @@ static unsigned long cpg_z_clk_recalc_rate(struct clk_hw *hw,
return div_u64((u64)parent_rate * mult, 32);
}
-static long cpg_z_clk_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cpg_z_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned long prate = *parent_rate;
unsigned int mult;
@@ -77,10 +77,11 @@ static long cpg_z_clk_round_rate(struct clk_hw *hw, unsigned long rate,
if (!prate)
prate = 1;
- mult = div_u64((u64)rate * 32, prate);
+ mult = div_u64((u64)*rate * 32, prate);
mult = clamp(mult, 1U, 32U);
- return *parent_rate / 32 * mult;
+ *rate = *parent_rate / 32 * mult;
+ return 0;
}
static int cpg_z_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/sirf/clk-common.c b/drivers/clk/sirf/clk-common.c
index 37af51c..68a7889 100644
--- a/drivers/clk/sirf/clk-common.c
+++ b/drivers/clk/sirf/clk-common.c
@@ -91,7 +91,7 @@ static unsigned long pll_clk_recalc_rate(struct clk_hw *hw,
}
}
-static long pll_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int pll_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
unsigned long fin, nf, nr, od;
@@ -101,9 +101,9 @@ static long pll_clk_round_rate(struct clk_hw *hw, unsigned long rate,
* fout = fin * nf / (nr * od);
* set od = 1, nr = fin/MHz, so fout = nf * MHz
*/
- rate = rate - rate % MHZ;
+ *rate = *rate - *rate % MHZ;
- nf = rate / MHZ;
+ nf = *rate / MHZ;
if (nf > BIT(13))
nf = BIT(13);
if (nf < 1)
@@ -119,7 +119,8 @@ static long pll_clk_round_rate(struct clk_hw *hw, unsigned long rate,
dividend = (u64)fin * nf;
do_div(dividend, nr * od);
- return (long)dividend;
+ *rate = dividend;
+ return 0;
}
static int pll_clk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -158,7 +159,7 @@ static int pll_clk_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
-static long cpu_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int cpu_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
/*
@@ -347,7 +348,7 @@ static unsigned long dmn_clk_recalc_rate(struct clk_hw *hw,
}
}
-static long dmn_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int dmn_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
unsigned long fin;
@@ -355,7 +356,7 @@ static long dmn_clk_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned bits = (strcmp(hw->init->name, "mem") == 0) ? 3 : 4;
fin = *parent_rate;
- ratio = fin / rate;
+ ratio = fin / *rate;
if (ratio < 2)
ratio = 2;
@@ -365,7 +366,8 @@ static long dmn_clk_round_rate(struct clk_hw *hw, unsigned long rate,
wait = (ratio >> 1) - 1;
hold = ratio - wait - 2;
- return fin / (wait + hold + 2);
+ *rate = fin / (wait + hold + 2);
+ return 0;
}
static int dmn_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/spear/clk-aux-synth.c b/drivers/clk/spear/clk-aux-synth.c
index bdfb442..1a93f6a 100644
--- a/drivers/clk/spear/clk-aux-synth.c
+++ b/drivers/clk/spear/clk-aux-synth.c
@@ -52,14 +52,20 @@ static unsigned long aux_calc_rate(struct clk_hw *hw, unsigned long prate,
(rtbl[index].yscale * eq)) * 10000;
}
-static long clk_aux_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_aux_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_aux *aux = to_clk_aux(hw);
int unused;
+ long ret;
- return clk_round_rate_index(hw, drate, *prate, aux_calc_rate,
+ ret = clk_round_rate_index(hw, *drate, *prate, aux_calc_rate,
aux->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_aux_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/spear/clk-frac-synth.c b/drivers/clk/spear/clk-frac-synth.c
index dffd4ce..d4098c8 100644
--- a/drivers/clk/spear/clk-frac-synth.c
+++ b/drivers/clk/spear/clk-frac-synth.c
@@ -55,14 +55,20 @@ static unsigned long frac_calc_rate(struct clk_hw *hw, unsigned long prate,
return prate;
}
-static long clk_frac_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_frac_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_frac *frac = to_clk_frac(hw);
int unused;
+ long ret;
- return clk_round_rate_index(hw, drate, *prate, frac_calc_rate,
+ ret = clk_round_rate_index(hw, *drate, *prate, frac_calc_rate,
frac->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_frac_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/spear/clk-gpt-synth.c b/drivers/clk/spear/clk-gpt-synth.c
index 1afc18c..ea3328b 100644
--- a/drivers/clk/spear/clk-gpt-synth.c
+++ b/drivers/clk/spear/clk-gpt-synth.c
@@ -42,14 +42,20 @@ static unsigned long gpt_calc_rate(struct clk_hw *hw, unsigned long prate,
return prate;
}
-static long clk_gpt_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_gpt_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_gpt *gpt = to_clk_gpt(hw);
int unused;
+ long ret;
- return clk_round_rate_index(hw, drate, *prate, gpt_calc_rate,
+ ret = clk_round_rate_index(hw, *drate, *prate, gpt_calc_rate,
gpt->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_gpt_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/spear/clk-vco-pll.c b/drivers/clk/spear/clk-vco-pll.c
index 1b9b65b..08b1411 100644
--- a/drivers/clk/spear/clk-vco-pll.c
+++ b/drivers/clk/spear/clk-vco-pll.c
@@ -113,12 +113,18 @@ static long clk_pll_round_rate_index(struct clk_hw *hw, unsigned long drate,
return rate;
}
-static long clk_pll_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_pll_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
int unused;
+ long ret;
- return clk_pll_round_rate_index(hw, drate, prate, &unused);
+ ret = clk_pll_round_rate_index(hw, *drate, prate, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_pll_recalc_rate(struct clk_hw *hw, unsigned long
@@ -179,14 +185,20 @@ static inline unsigned long vco_calc_rate(struct clk_hw *hw,
return pll_calc_rate(vco->rtbl, prate, index, NULL);
}
-static long clk_vco_round_rate(struct clk_hw *hw, unsigned long drate,
+static int clk_vco_round_rate(struct clk_hw *hw, unsigned long *drate,
unsigned long *prate)
{
struct clk_vco *vco = to_clk_vco(hw);
int unused;
+ long ret;
- return clk_round_rate_index(hw, drate, *prate, vco_calc_rate,
+ ret = clk_round_rate_index(hw, *drate, *prate, vco_calc_rate,
vco->rtbl_cnt, &unused);
+ if (ret < 0)
+ return ret;
+
+ *drate = ret;
+ return 0;
}
static unsigned long clk_vco_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/st/clk-flexgen.c b/drivers/clk/st/clk-flexgen.c
index bf12a25..d04278b 100644
--- a/drivers/clk/st/clk-flexgen.c
+++ b/drivers/clk/st/clk-flexgen.c
@@ -100,20 +100,21 @@ clk_best_div(unsigned long parent_rate, unsigned long rate)
return parent_rate / rate + ((rate > (2*(parent_rate % rate))) ? 0 : 1);
}
-static long flexgen_round_rate(struct clk_hw *hw, unsigned long rate,
+static int flexgen_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
unsigned long div;
/* Round div according to exact prate and wished rate */
- div = clk_best_div(*prate, rate);
+ div = clk_best_div(*prate, *rate);
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
- *prate = rate * div;
- return rate;
+ *prate = *rate * div;
+ return 0;
}
- return *prate / div;
+ *rate = *prate / div;
+ return 0;
}
unsigned long flexgen_recalc_rate(struct clk_hw *hw,
diff --git a/drivers/clk/st/clkgen-fsyn.c b/drivers/clk/st/clkgen-fsyn.c
index af94ed8..7c70049 100644
--- a/drivers/clk/st/clkgen-fsyn.c
+++ b/drivers/clk/st/clkgen-fsyn.c
@@ -548,21 +548,22 @@ int clk_fs660c32_vco_get_params(unsigned long input,
return 0;
}
-static long quadfs_pll_fs660c32_round_rate(struct clk_hw *hw, unsigned long rate
- , unsigned long *prate)
+static int quadfs_pll_fs660c32_round_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long *prate)
{
struct stm_fs params;
- if (!clk_fs660c32_vco_get_params(*prate, rate, ¶ms))
- clk_fs660c32_vco_get_rate(*prate, ¶ms, &rate);
+ if (!clk_fs660c32_vco_get_params(*prate, *rate, ¶ms))
+ clk_fs660c32_vco_get_rate(*prate, ¶ms, rate);
pr_debug("%s: %s new rate %ld [sdiv=0x%x,md=0x%x,pe=0x%x,nsdiv3=%u]\n",
__func__, __clk_get_name(hw->clk),
- rate, (unsigned int)params.sdiv,
+ *rate, (unsigned int)params.sdiv,
(unsigned int)params.mdiv,
(unsigned int)params.pe, (unsigned int)params.nsdiv);
- return rate;
+ return 0;
}
static int quadfs_pll_fs660c32_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -953,19 +954,19 @@ static unsigned long quadfs_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long quadfs_round_rate(struct clk_hw *hw, unsigned long rate,
+static int quadfs_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct stm_fs params;
- rate = quadfs_find_best_rate(hw, rate, *prate, ¶ms);
+ *rate = quadfs_find_best_rate(hw, *rate, *prate, ¶ms);
pr_debug("%s: %s new rate %ld [sdiv=0x%x,md=0x%x,pe=0x%x,nsdiv3=%u]\n",
__func__, __clk_get_name(hw->clk),
- rate, (unsigned int)params.sdiv, (unsigned int)params.mdiv,
+ *rate, (unsigned int)params.sdiv, (unsigned int)params.mdiv,
(unsigned int)params.pe, (unsigned int)params.nsdiv);
- return rate;
+ return 0;
}
diff --git a/drivers/clk/st/clkgen-mux.c b/drivers/clk/st/clkgen-mux.c
index 9a15ec3..2bbcb7b 100644
--- a/drivers/clk/st/clkgen-mux.c
+++ b/drivers/clk/st/clkgen-mux.c
@@ -190,7 +190,7 @@ static int clkgena_divmux_set_rate(struct clk_hw *hw, unsigned long rate,
return clk_divider_ops.set_rate(div_hw, rate, parent_rate);
}
-static long clkgena_divmux_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clkgena_divmux_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct clkgena_divmux *genamux = to_clkgena_divmux(hw);
diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factors.c
index 8c20190..5865300 100644
--- a/drivers/clk/sunxi/clk-factors.c
+++ b/drivers/clk/sunxi/clk-factors.c
@@ -69,14 +69,17 @@ static unsigned long clk_factors_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long clk_factors_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_factors_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct clk_factors *factors = to_clk_factors(hw);
- factors->get_factors((u32 *)&rate, (u32)*parent_rate,
+ u32 tmp_rate = *rate;
+
+ factors->get_factors(&tmp_rate, (u32)*parent_rate,
NULL, NULL, NULL, NULL);
- return rate;
+ *rate = tmp_rate;
+ return 0;
}
static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
@@ -100,7 +103,8 @@ static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
else
parent_rate = __clk_get_rate(parent);
- child_rate = clk_factors_round_rate(hw, rate, &parent_rate);
+ child_rate = rate;
+ clk_factors_round_rate(hw, &child_rate, &parent_rate);
if (child_rate <= rate && child_rate > best_child_rate) {
best_parent = parent;
diff --git a/drivers/clk/tegra/clk-audio-sync.c b/drivers/clk/tegra/clk-audio-sync.c
index c0f7843..0224256 100644
--- a/drivers/clk/tegra/clk-audio-sync.c
+++ b/drivers/clk/tegra/clk-audio-sync.c
@@ -28,15 +28,15 @@ static unsigned long clk_sync_source_recalc_rate(struct clk_hw *hw,
return sync->rate;
}
-static long clk_sync_source_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_sync_source_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct tegra_clk_sync_source *sync = to_clk_sync_source(hw);
- if (rate > sync->max_rate)
+ if (*rate > sync->max_rate)
return -EINVAL;
else
- return rate;
+ return 0;
}
static int clk_sync_source_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/tegra/clk-divider.c b/drivers/clk/tegra/clk-divider.c
index 59a5714..9e5ca82 100644
--- a/drivers/clk/tegra/clk-divider.c
+++ b/drivers/clk/tegra/clk-divider.c
@@ -85,23 +85,28 @@ static unsigned long clk_frac_div_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long clk_frac_div_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_frac_div_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_frac_div *divider = to_clk_frac_div(hw);
int div, mul;
unsigned long output_rate = *prate;
- if (!rate)
- return output_rate;
+ if (!*rate) {
+ *rate = output_rate;
+ return 0;
+ }
- div = get_div(divider, rate, output_rate);
- if (div < 0)
- return *prate;
+ div = get_div(divider, *rate, output_rate);
+ if (div < 0) {
+ *rate = *prate;
+ return 0;
+ }
mul = get_mul(divider);
- return DIV_ROUND_UP(output_rate * mul, div + mul);
+ *rate = DIV_ROUND_UP(output_rate * mul, div + mul);
+ return 0;
}
static int clk_frac_div_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/tegra/clk-periph.c b/drivers/clk/tegra/clk-periph.c
index d84ae49..5a262f5 100644
--- a/drivers/clk/tegra/clk-periph.c
+++ b/drivers/clk/tegra/clk-periph.c
@@ -56,8 +56,8 @@ static unsigned long clk_periph_recalc_rate(struct clk_hw *hw,
return div_ops->recalc_rate(div_hw, parent_rate);
}
-static long clk_periph_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_periph_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct tegra_clk_periph *periph = to_clk_periph(hw);
const struct clk_ops *div_ops = periph->div_ops;
diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c
index bfef9ab..a73bdb3 100644
--- a/drivers/clk/tegra/clk-pll.c
+++ b/drivers/clk/tegra/clk-pll.c
@@ -623,24 +623,29 @@ static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
return ret;
}
-static long clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
struct tegra_clk_pll_freq_table cfg;
- if (pll->params->flags & TEGRA_PLL_FIXED)
- return pll->params->fixed_rate;
+ if (pll->params->flags & TEGRA_PLL_FIXED) {
+ *rate = pll->params->fixed_rate;
+ return 0;
+ }
/* PLLM is used for memory; we do not change rate */
- if (pll->params->flags & TEGRA_PLLM)
- return __clk_get_rate(hw->clk);
+ if (pll->params->flags & TEGRA_PLLM) {
+ *rate = __clk_get_rate(hw->clk);
+ return 0;
+ }
- if (_get_table_rate(hw, &cfg, rate, *prate) &&
- _calc_rate(hw, &cfg, rate, *prate))
+ if (_get_table_rate(hw, &cfg, *rate, *prate) &&
+ _calc_rate(hw, &cfg, *rate, *prate))
return -EINVAL;
- return cfg.output_rate;
+ *rate = cfg.output_rate;
+ return 0;
}
static unsigned long clk_pll_recalc_rate(struct clk_hw *hw,
@@ -1001,25 +1006,28 @@ static int clk_pllxc_set_rate(struct clk_hw *hw, unsigned long rate,
return ret;
}
-static long clk_pll_ramp_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pll_ramp_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_pll_freq_table cfg;
int ret = 0, p_div;
u64 output_rate = *prate;
- ret = _pll_ramp_calc_pll(hw, &cfg, rate, *prate);
+ ret = _pll_ramp_calc_pll(hw, &cfg, *rate, *prate);
if (ret < 0)
return ret;
p_div = _hw_to_p_div(hw, cfg.p);
- if (p_div < 0)
- return p_div;
+ if (p_div < 0) {
+ *rate = p_div;
+ return 0;
+ }
output_rate *= cfg.n;
do_div(output_rate, cfg.m * p_div);
- return output_rate;
+ *rate = output_rate;
+ return 0;
}
static int clk_pllm_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -1272,12 +1280,13 @@ static unsigned long clk_pllre_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long clk_pllre_round_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pllre_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
- return _pllre_calc_rate(pll, NULL, rate, *prate);
+ *rate = _pllre_calc_rate(pll, NULL, *rate, *prate);
+ return 0;
}
static int clk_plle_tegra114_enable(struct clk_hw *hw)
diff --git a/drivers/clk/ti/clk-dra7-atl.c b/drivers/clk/ti/clk-dra7-atl.c
index 59bb4b3..cdf1d17 100644
--- a/drivers/clk/ti/clk-dra7-atl.c
+++ b/drivers/clk/ti/clk-dra7-atl.c
@@ -124,16 +124,17 @@ static unsigned long atl_clk_recalc_rate(struct clk_hw *hw,
return parent_rate / cdesc->divider;
}
-static long atl_clk_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int atl_clk_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
unsigned divider;
- divider = (*parent_rate + rate / 2) / rate;
+ divider = (*parent_rate + *rate / 2) / *rate;
if (divider > DRA7_ATL_DIVIDER_MASK + 1)
divider = DRA7_ATL_DIVIDER_MASK + 1;
- return *parent_rate / divider;
+ *rate = *parent_rate / divider;
+ return 0;
}
static int atl_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/ti/composite.c b/drivers/clk/ti/composite.c
index 3654f61..eddad41 100644
--- a/drivers/clk/ti/composite.c
+++ b/drivers/clk/ti/composite.c
@@ -36,8 +36,8 @@ static unsigned long ti_composite_recalc_rate(struct clk_hw *hw,
return ti_clk_divider_ops.recalc_rate(hw, parent_rate);
}
-static long ti_composite_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int ti_composite_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
return -EINVAL;
}
diff --git a/drivers/clk/ti/divider.c b/drivers/clk/ti/divider.c
index ff5f117..6044251 100644
--- a/drivers/clk/ti/divider.c
+++ b/drivers/clk/ti/divider.c
@@ -200,13 +200,14 @@ static int ti_clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
return bestdiv;
}
-static long ti_clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int ti_clk_divider_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
int div;
- div = ti_clk_divider_bestdiv(hw, rate, prate);
+ div = ti_clk_divider_bestdiv(hw, *rate, prate);
- return DIV_ROUND_UP(*prate, div);
+ *rate = DIV_ROUND_UP(*prate, div);
+ return 0;
}
static int ti_clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/ux500/clk-prcmu.c b/drivers/clk/ux500/clk-prcmu.c
index bf63c96..1e1aa2d 100644
--- a/drivers/clk/ux500/clk-prcmu.c
+++ b/drivers/clk/ux500/clk-prcmu.c
@@ -80,11 +80,18 @@ static unsigned long clk_prcmu_recalc_rate(struct clk_hw *hw,
return prcmu_clock_rate(clk->cg_sel);
}
-static long clk_prcmu_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int clk_prcmu_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
- return prcmu_round_clock_rate(clk->cg_sel, rate);
+ long ret;
+
+ ret = prcmu_round_clock_rate(clk->cg_sel, *rate);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
}
static int clk_prcmu_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/versatile/clk-icst.c b/drivers/clk/versatile/clk-icst.c
index bc96f10..6404e61 100644
--- a/drivers/clk/versatile/clk-icst.c
+++ b/drivers/clk/versatile/clk-icst.c
@@ -91,14 +91,15 @@ static unsigned long icst_recalc_rate(struct clk_hw *hw,
return icst->rate;
}
-static long icst_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int icst_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
struct clk_icst *icst = to_icst(hw);
struct icst_vco vco;
- vco = icst_hz_to_vco(icst->params, rate);
- return icst_hz(icst->params, vco);
+ vco = icst_hz_to_vco(icst->params, *rate);
+ *rate = icst_hz(icst->params, vco);
+ return 0;
}
static int icst_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/versatile/clk-vexpress-osc.c b/drivers/clk/versatile/clk-vexpress-osc.c
index 765f1e0..b507758 100644
--- a/drivers/clk/versatile/clk-vexpress-osc.c
+++ b/drivers/clk/versatile/clk-vexpress-osc.c
@@ -39,18 +39,18 @@ static unsigned long vexpress_osc_recalc_rate(struct clk_hw *hw,
return rate;
}
-static long vexpress_osc_round_rate(struct clk_hw *hw, unsigned long rate,
+static int vexpress_osc_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
struct vexpress_osc *osc = to_vexpress_osc(hw);
- if (WARN_ON(osc->rate_min && rate < osc->rate_min))
- rate = osc->rate_min;
+ if (WARN_ON(osc->rate_min && *rate < osc->rate_min))
+ *rate = osc->rate_min;
- if (WARN_ON(osc->rate_max && rate > osc->rate_max))
- rate = osc->rate_max;
+ if (WARN_ON(osc->rate_max && *rate > osc->rate_max))
+ *rate = osc->rate_max;
- return rate;
+ return 0;
}
static int vexpress_osc_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/zynq/pll.c b/drivers/clk/zynq/pll.c
index 00d72fb..b62d298 100644
--- a/drivers/clk/zynq/pll.c
+++ b/drivers/clk/zynq/pll.c
@@ -60,18 +60,19 @@ struct zynq_pll {
* @prate: Clock frequency of parent clock
* Returns frequency closest to @rate the hardware can generate.
*/
-static long zynq_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int zynq_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate)
{
u32 fbdiv;
- fbdiv = DIV_ROUND_CLOSEST(rate, *prate);
+ fbdiv = DIV_ROUND_CLOSEST(*rate, *prate);
if (fbdiv < PLL_FBDIV_MIN)
fbdiv = PLL_FBDIV_MIN;
else if (fbdiv > PLL_FBDIV_MAX)
fbdiv = PLL_FBDIV_MAX;
- return *prate * fbdiv;
+ *rate = *prate * fbdiv;
+ return 0;
}
/**
diff --git a/drivers/gpu/drm/imx/imx-tve.c b/drivers/gpu/drm/imx/imx-tve.c
index 4216e47..0695428 100644
--- a/drivers/gpu/drm/imx/imx-tve.c
+++ b/drivers/gpu/drm/imx/imx-tve.c
@@ -423,17 +423,20 @@ static unsigned long clk_tve_di_recalc_rate(struct clk_hw *hw,
return 0;
}
-static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_tve_di_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
unsigned long div;
- div = *prate / rate;
+ div = *prate / *rate;
if (div >= 4)
- return *prate / 4;
+ *rate = *prate / 4;
else if (div >= 2)
- return *prate / 2;
- return *prate;
+ *rate = *prate / 2;
+ else
+ *rate = *prate;
+
+ return 0;
}
static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c
index eeed006..97cdcb4 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c
@@ -336,11 +336,12 @@ static unsigned long hdmi_pll_recalc_rate(struct clk_hw *hw,
return phy_8960->pixclk;
}
-static long hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int hdmi_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- const struct pll_rate *pll_rate = find_rate(rate);
- return pll_rate->rate;
+ const struct pll_rate *pll_rate = find_rate(*rate);
+ *rate = pll_rate->rate;
+ return 0;
}
static int hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c
index ce42459..c89b109 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_pll.c
@@ -109,11 +109,12 @@ static unsigned long mpd4_lvds_pll_recalc_rate(struct clk_hw *hw,
return lvds_pll->pixclk;
}
-static long mpd4_lvds_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+static int mpd4_lvds_pll_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- const struct pll_rate *pll_rate = find_rate(rate);
- return pll_rate->rate;
+ const struct pll_rate *pll_rate = find_rate(*rate);
+ *rate = pll_rate->rate;
+ return 0;
}
static int mpd4_lvds_pll_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c
index deca809..4d5ba85 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -231,11 +231,11 @@ static u32 isp_xclk_calc_divider(unsigned long *rate, unsigned long parent_rate)
return divider;
}
-static long isp_xclk_round_rate(struct clk_hw *hw, unsigned long rate,
+static int isp_xclk_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate)
{
- isp_xclk_calc_divider(&rate, *parent_rate);
- return rate;
+ isp_xclk_calc_divider(rate, *parent_rate);
+ return 0;
}
static int isp_xclk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
index b936bb4..5e6f5a5 100644
--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -316,15 +316,19 @@ static unsigned long hym8563_clkout_recalc_rate(struct clk_hw *hw,
return clkout_rates[ret];
}
-static long hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *prate)
{
int i;
- for (i = 0; i < ARRAY_SIZE(clkout_rates); i++)
- if (clkout_rates[i] <= rate)
- return clkout_rates[i];
+ for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) {
+ if (clkout_rates[i] <= *rate) {
+ *rate = clkout_rates[i];
+ return 0;
+ }
+ }
+ *rate = 0;
return 0;
}
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 5591ea7..1213b0b 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -173,8 +173,8 @@ struct clk_ops {
void (*disable_unused)(struct clk_hw *hw);
unsigned long (*recalc_rate)(struct clk_hw *hw,
unsigned long parent_rate);
- long (*round_rate)(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate);
+ int (*round_rate)(struct clk_hw *hw, unsigned long *rate,
+ unsigned long *parent_rate);
long (*determine_rate)(struct clk_hw *hw,
unsigned long rate,
unsigned long min_rate,
@@ -365,7 +365,7 @@ extern const struct clk_ops clk_divider_ops;
unsigned long divider_recalc_rate(struct clk_hw *hw, unsigned long parent_rate,
unsigned int val, const struct clk_div_table *table,
unsigned long flags);
-long divider_round_rate(struct clk_hw *hw, unsigned long rate,
+int divider_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate, const struct clk_div_table *table,
u8 width, unsigned long flags);
int divider_get_val(unsigned long rate, unsigned long parent_rate,
diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h
index 6784400..3b2406c 100644
--- a/include/linux/clk/ti.h
+++ b/include/linux/clk/ti.h
@@ -277,9 +277,9 @@ long omap3_noncore_dpll_determine_rate(struct clk_hw *hw,
struct clk_hw **best_parent_clk);
unsigned long omap4_dpll_regm4xen_recalc(struct clk_hw *hw,
unsigned long parent_rate);
-long omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
- unsigned long target_rate,
- unsigned long *parent_rate);
+int omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
+ unsigned long *target_rate,
+ unsigned long *parent_rate);
long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw,
unsigned long rate,
unsigned long min_rate,
@@ -288,14 +288,14 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw,
struct clk_hw **best_parent_clk);
u8 omap2_init_dpll_parent(struct clk_hw *hw);
unsigned long omap3_dpll_recalc(struct clk_hw *hw, unsigned long parent_rate);
-long omap2_dpll_round_rate(struct clk_hw *hw, unsigned long target_rate,
- unsigned long *parent_rate);
+int omap2_dpll_round_rate(struct clk_hw *hw, unsigned long *target_rate,
+ unsigned long *parent_rate);
void omap2_init_clk_clkdm(struct clk_hw *clk);
unsigned long omap3_clkoutx2_recalc(struct clk_hw *hw,
unsigned long parent_rate);
int omap3_clkoutx2_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate);
-long omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long rate,
+int omap3_clkoutx2_round_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long *prate);
int omap2_clkops_enable_clkdm(struct clk_hw *hw);
void omap2_clkops_disable_clkdm(struct clk_hw *hw);
--
1.9.1
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH 2/2] clk: change clk_ops' ->determine_rate() prototype
[not found] <1429255769-13639-1-git-send-email-boris.brezillon@free-electrons.com>
@ 2015-04-17 7:29 ` Boris Brezillon
2015-04-17 7:29 ` Boris Brezillon
1 sibling, 0 replies; 18+ messages in thread
From: Boris Brezillon @ 2015-04-17 7:29 UTC (permalink / raw)
To: Mike Turquette
Cc: Mikko Perttunen, Boris Brezillon, Jonathan Corbet, Tony Lindgren,
Ralf Baechle, Emilio López, Maxime Ripard, Tero Kristo,
linux-doc, linux-kernel, linux-arm-kernel, linux-omap,
linux-mips
Clock rates are stored in an unsigned long field, but ->determine_rate()
(which returns a rounded rate from a requested one) returns a long
value (errors are reported using negative error codes), which can lead
to long overflow if the clock rate exceed 2Ghz.
Change ->determine_rate() prototype to return 0 or an error code, and pass
the requested rate as a pointer so that it can be adjusted depending on
hardware capabilities.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
CC: Jonathan Corbet <corbet@lwn.net>
CC: Tony Lindgren <tony@atomide.com>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: "Emilio López" <emilio@elopez.com.ar>
CC: Maxime Ripard <maxime.ripard@free-electrons.com>
CC: Tero Kristo <t-kristo@ti.com>
CC: linux-doc@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-omap@vger.kernel.org
CC: linux-mips@linux-mips.org
Documentation/clk.txt | 4 +--
arch/arm/mach-omap2/dpll3xxx.c | 20 +++++------
arch/arm/mach-omap2/dpll44xx.c | 20 +++++------
arch/mips/alchemy/common/clock.c | 63 +++++++++++++++++++++-----------
drivers/clk/at91/clk-programmable.c | 28 +++++++++------
drivers/clk/bcm/clk-kona.c | 24 ++++++++-----
drivers/clk/clk-composite.c | 22 ++++++------
drivers/clk/clk.c | 72 +++++++++++++++++++++----------------
drivers/clk/hisilicon/clk-hi3620.c | 22 ++++++------
drivers/clk/mmp/clk-mix.c | 17 ++++-----
drivers/clk/qcom/clk-pll.c | 12 ++++---
drivers/clk/qcom/clk-rcg.c | 32 +++++++++--------
drivers/clk/qcom/clk-rcg2.c | 55 +++++++++++++++-------------
drivers/clk/sunxi/clk-factors.c | 19 +++++-----
drivers/clk/sunxi/clk-sun6i-ar100.c | 18 ++++++----
drivers/clk/sunxi/clk-sunxi.c | 19 +++++-----
include/linux/clk-provider.h | 24 ++++++-------
include/linux/clk/ti.h | 24 ++++++-------
18 files changed, 278 insertions(+), 217 deletions(-)
diff --git a/Documentation/clk.txt b/Documentation/clk.txt
index fca8b7a..f5cae13 100644
--- a/Documentation/clk.txt
+++ b/Documentation/clk.txt
@@ -71,8 +71,8 @@ the operations defined in clk.h:
int (*round_rate)(struct clk_hw *hw,
unsigned long *rate,
unsigned long *parent_rate);
- long (*determine_rate)(struct clk_hw *hw,
- unsigned long rate,
+ int (*determine_rate)(struct clk_hw *hw,
+ unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
diff --git a/arch/arm/mach-omap2/dpll3xxx.c b/arch/arm/mach-omap2/dpll3xxx.c
index 7a6fb45..cfa24fd 100644
--- a/arch/arm/mach-omap2/dpll3xxx.c
+++ b/arch/arm/mach-omap2/dpll3xxx.c
@@ -472,37 +472,37 @@ void omap3_noncore_dpll_disable(struct clk_hw *hw)
* Returns a positive clock rate with success, negative error value
* in failure.
*/
-long omap3_noncore_dpll_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+int omap3_noncore_dpll_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
struct dpll_data *dd;
int ret;
- if (!hw || !rate)
+ if (!hw || !*rate)
return -EINVAL;
dd = clk->dpll_data;
if (!dd)
return -EINVAL;
- if (__clk_get_rate(dd->clk_bypass) == rate &&
+ if (__clk_get_rate(dd->clk_bypass) == *rate &&
(dd->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
*best_parent_clk = __clk_get_hw(dd->clk_bypass);
} else {
- ret = omap2_dpll_round_rate(hw, &rate, best_parent_rate);
+ ret = omap2_dpll_round_rate(hw, rate, best_parent_rate);
if (ret)
return ret;
*best_parent_clk = __clk_get_hw(dd->clk_ref);
}
- *best_parent_rate = rate;
+ *best_parent_rate = *rate;
- return rate;
+ return 0;
}
/**
diff --git a/arch/arm/mach-omap2/dpll44xx.c b/arch/arm/mach-omap2/dpll44xx.c
index afd3284..1571d41 100644
--- a/arch/arm/mach-omap2/dpll44xx.c
+++ b/arch/arm/mach-omap2/dpll44xx.c
@@ -203,28 +203,28 @@ out:
* Returns a positive clock rate with success, negative error value
* in failure.
*/
-long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+int omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
struct dpll_data *dd;
int ret;
- if (!hw || !rate)
+ if (!hw || !*rate)
return -EINVAL;
dd = clk->dpll_data;
if (!dd)
return -EINVAL;
- if (__clk_get_rate(dd->clk_bypass) == rate &&
+ if (__clk_get_rate(dd->clk_bypass) == *rate &&
(dd->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
*best_parent_clk = __clk_get_hw(dd->clk_bypass);
} else {
- ret = omap4_dpll_regm4xen_round_rate(hw, &rate,
+ ret = omap4_dpll_regm4xen_round_rate(hw, rate,
best_parent_rate);
if (ret)
return ret;
@@ -232,7 +232,7 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw, unsigned long rate,
*best_parent_clk = __clk_get_hw(dd->clk_ref);
}
- *best_parent_rate = rate;
+ *best_parent_rate = *rate;
- return rate;
+ return 0;
}
diff --git a/arch/mips/alchemy/common/clock.c b/arch/mips/alchemy/common/clock.c
index d697d8f..0abcfc6 100644
--- a/arch/mips/alchemy/common/clock.c
+++ b/arch/mips/alchemy/common/clock.c
@@ -565,14 +565,22 @@ static unsigned long alchemy_clk_fgv1_recalc(struct clk_hw *hw,
return parent_rate / v;
}
-static long alchemy_clk_fgv1_detr(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+static int alchemy_clk_fgv1_detr(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
- return alchemy_clk_fgcs_detr(hw, rate, best_parent_rate,
- best_parent_clk, 2, 512);
+ long ret;
+
+ ret = alchemy_clk_fgcs_detr(hw, *rate, best_parent_rate,
+ best_parent_clk, 2, 512);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+
+ return 0;
}
/* Au1000, Au1100, Au15x0, Au12x0 */
@@ -699,14 +707,15 @@ static unsigned long alchemy_clk_fgv2_recalc(struct clk_hw *hw,
return t;
}
-static long alchemy_clk_fgv2_detr(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+static int alchemy_clk_fgv2_detr(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
struct alchemy_fgcs_clk *c = to_fgcs_clk(hw);
int scale, maxdiv;
+ long ret;
if (alchemy_rdsys(c->reg) & (1 << 30)) {
scale = 1;
@@ -716,8 +725,13 @@ static long alchemy_clk_fgv2_detr(struct clk_hw *hw, unsigned long rate,
maxdiv = 512;
}
- return alchemy_clk_fgcs_detr(hw, rate, best_parent_rate,
- best_parent_clk, scale, maxdiv);
+ ret = alchemy_clk_fgcs_detr(hw, *rate, best_parent_rate,
+ best_parent_clk, scale, maxdiv);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
}
/* Au1300 larger input mux, no separate disable bit, flexible divider */
@@ -920,17 +934,24 @@ static int alchemy_clk_csrc_setr(struct clk_hw *hw, unsigned long rate,
return 0;
}
-static long alchemy_clk_csrc_detr(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+static int alchemy_clk_csrc_detr(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
struct alchemy_fgcs_clk *c = to_fgcs_clk(hw);
int scale = c->dt[2] == 3 ? 1 : 2; /* au1300 check */
+ long ret;
- return alchemy_clk_fgcs_detr(hw, rate, best_parent_rate,
- best_parent_clk, scale, 4);
+ ret = alchemy_clk_fgcs_detr(hw, *rate, best_parent_rate,
+ best_parent_clk, scale, 4);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+
+ return 0;
}
static struct clk_ops alchemy_clkops_csrc = {
diff --git a/drivers/clk/at91/clk-programmable.c b/drivers/clk/at91/clk-programmable.c
index 86c8a07..5f9570d 100644
--- a/drivers/clk/at91/clk-programmable.c
+++ b/drivers/clk/at91/clk-programmable.c
@@ -54,17 +54,18 @@ static unsigned long clk_programmable_recalc_rate(struct clk_hw *hw,
return parent_rate >> pres;
}
-static long clk_programmable_determine_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_hw)
+static int clk_programmable_determine_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_hw)
{
struct clk *parent = NULL;
- long best_rate = -EINVAL;
unsigned long parent_rate;
+ unsigned long best_rate;
unsigned long tmp_rate;
+ int ret = -EINVAL;
int shift;
int i;
@@ -76,24 +77,29 @@ static long clk_programmable_determine_rate(struct clk_hw *hw,
parent_rate = __clk_get_rate(parent);
for (shift = 0; shift < PROG_PRES_MASK; shift++) {
tmp_rate = parent_rate >> shift;
- if (tmp_rate <= rate)
+ if (tmp_rate <= *rate)
break;
}
- if (tmp_rate > rate)
+ if (tmp_rate > *rate)
continue;
- if (best_rate < 0 || (rate - tmp_rate) < (rate - best_rate)) {
+ if (best_rate < 0 || (*rate - tmp_rate) < (*rate - best_rate)) {
best_rate = tmp_rate;
*best_parent_rate = parent_rate;
*best_parent_hw = __clk_get_hw(parent);
+ ret = 0;
}
if (!best_rate)
break;
}
- return best_rate;
+ if (ret)
+ return ret;
+
+ *rate = best_rate;
+ return 0;
}
static int clk_programmable_set_parent(struct clk_hw *hw, u8 index)
diff --git a/drivers/clk/bcm/clk-kona.c b/drivers/clk/bcm/clk-kona.c
index 05abae8..4a2a66b 100644
--- a/drivers/clk/bcm/clk-kona.c
+++ b/drivers/clk/bcm/clk-kona.c
@@ -1031,7 +1031,7 @@ static long kona_peri_clk_round_rate(struct clk_hw *hw, unsigned long rate,
rate ? rate : 1, *parent_rate, NULL);
}
-static long kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate, struct clk_hw **best_parent)
@@ -1044,6 +1044,7 @@ static long kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long best_rate;
u32 parent_count;
u32 which;
+ long ret;
/*
* If there is no other parent to choose, use the current one.
@@ -1051,14 +1052,20 @@ static long kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
*/
WARN_ON_ONCE(bcm_clk->init_data.flags & CLK_SET_RATE_NO_REPARENT);
parent_count = (u32)bcm_clk->init_data.num_parents;
- if (parent_count < 2)
- return kona_peri_clk_round_rate(hw, rate, best_parent_rate);
+ if (parent_count < 2) {
+ ret = kona_peri_clk_round_rate(hw, *rate, best_parent_rate);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
+ }
/* Unless we can do better, stick with current parent */
current_parent = clk_get_parent(clk);
parent_rate = __clk_get_rate(current_parent);
- best_rate = kona_peri_clk_round_rate(hw, rate, &parent_rate);
- best_delta = abs(best_rate - rate);
+ best_rate = kona_peri_clk_round_rate(hw, *rate, &parent_rate);
+ best_delta = abs(best_rate - *rate);
/* Check whether any other parent clock can produce a better result */
for (which = 0; which < parent_count; which++) {
@@ -1072,8 +1079,8 @@ static long kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
/* We don't support CLK_SET_RATE_PARENT */
parent_rate = __clk_get_rate(parent);
- other_rate = kona_peri_clk_round_rate(hw, rate, &parent_rate);
- delta = abs(other_rate - rate);
+ other_rate = kona_peri_clk_round_rate(hw, *rate, &parent_rate);
+ delta = abs(other_rate - *rate);
if (delta < best_delta) {
best_delta = delta;
best_rate = other_rate;
@@ -1082,7 +1089,8 @@ static long kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
}
}
- return best_rate;
+ *rate = best_rate;
+ return 0;
}
static int kona_peri_clk_set_parent(struct clk_hw *hw, u8 index)
diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c
index f56a71d..45c2b51 100644
--- a/drivers/clk/clk-composite.c
+++ b/drivers/clk/clk-composite.c
@@ -55,7 +55,7 @@ static unsigned long clk_composite_recalc_rate(struct clk_hw *hw,
return rate_ops->recalc_rate(rate_hw, parent_rate);
}
-static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_composite_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
@@ -88,12 +88,8 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
*best_parent_p = __clk_get_hw(parent);
*best_parent_rate = __clk_get_rate(parent);
- ret = rate_ops->round_rate(rate_hw, &rate,
- best_parent_rate);
- if (ret)
- return ret;
-
- return rate;
+ return rate_ops->round_rate(rate_hw, rate,
+ best_parent_rate);
}
for (i = 0; i < __clk_get_num_parents(mux_hw->clk); i++) {
@@ -103,13 +99,13 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
parent_rate = __clk_get_rate(parent);
- tmp_rate = rate;
+ tmp_rate = *rate;
ret = rate_ops->round_rate(rate_hw, &tmp_rate,
&parent_rate);
if (ret < 0)
continue;
- rate_diff = abs(rate - tmp_rate);
+ rate_diff = abs(*rate - tmp_rate);
if (!rate_diff || !*best_parent_p
|| best_rate_diff > rate_diff) {
@@ -120,10 +116,10 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
}
if (!rate_diff)
- return rate;
+ break;
}
- return best_rate;
+ *rate = best_rate;
} else if (mux_hw && mux_ops && mux_ops->determine_rate) {
__clk_hw_set_clk(mux_hw, hw);
return mux_ops->determine_rate(mux_hw, rate, min_rate,
@@ -131,8 +127,10 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
best_parent_p);
} else {
pr_err("clk: clk_composite_determine_rate function called, but no mux or rate callback set!\n");
- return 0;
+ *rate = 0;
}
+
+ return 0;
}
static int clk_composite_round_rate(struct clk_hw *hw, unsigned long *rate,
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 1462ddc..f42a639 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -795,8 +795,8 @@ static bool mux_is_better_rate(unsigned long rate, unsigned long now,
return now <= rate && now > best;
}
-static long
-clk_mux_determine_rate_flags(struct clk_hw *hw, unsigned long rate,
+static int
+clk_mux_determine_rate_flags(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
@@ -804,15 +804,15 @@ clk_mux_determine_rate_flags(struct clk_hw *hw, unsigned long rate,
unsigned long flags)
{
struct clk_core *core = hw->core, *parent, *best_parent = NULL;
- int i, num_parents;
- unsigned long parent_rate, best = 0;
+ int i, num_parents, ret = 0;
+ unsigned long parent_rate = *rate, best = *rate;
/* if NO_REPARENT flag set, pass through to current parent */
if (core->flags & CLK_SET_RATE_NO_REPARENT) {
parent = core->parent;
if (core->flags & CLK_SET_RATE_PARENT)
- best = __clk_determine_rate(parent ? parent->hw : NULL,
- rate, min_rate, max_rate);
+ ret = __clk_determine_rate(parent ? parent->hw : NULL,
+ &best, min_rate, max_rate);
else if (parent)
best = clk_core_get_rate_nolock(parent);
else
@@ -827,23 +827,28 @@ clk_mux_determine_rate_flags(struct clk_hw *hw, unsigned long rate,
if (!parent)
continue;
if (core->flags & CLK_SET_RATE_PARENT)
- parent_rate = __clk_determine_rate(parent->hw, rate,
- min_rate,
- max_rate);
+ ret = __clk_determine_rate(parent->hw, &parent_rate,
+ min_rate,
+ max_rate);
else
parent_rate = clk_core_get_rate_nolock(parent);
- if (mux_is_better_rate(rate, parent_rate, best, flags)) {
+ if (!ret &&
+ mux_is_better_rate(*rate, parent_rate, best, flags)) {
best_parent = parent;
best = parent_rate;
}
}
out:
+ if (ret)
+ return ret;
+
if (best_parent)
*best_parent_p = best_parent->hw;
*best_parent_rate = best;
+ *rate = best;
- return best;
+ return 0;
}
struct clk *__clk_lookup(const char *name)
@@ -874,11 +879,11 @@ static void clk_core_get_boundaries(struct clk_core *clk,
* directly as a determine_rate callback (e.g. for a mux), or from a more
* complex clock that may combine a mux with other operations.
*/
-long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_p)
+int __clk_mux_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_p)
{
return clk_mux_determine_rate_flags(hw, rate, min_rate, max_rate,
best_parent_rate,
@@ -886,7 +891,7 @@ long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
}
EXPORT_SYMBOL_GPL(__clk_mux_determine_rate);
-long __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long rate,
+int __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
@@ -1143,9 +1148,12 @@ static unsigned long clk_core_round_rate_nolock(struct clk_core *clk,
if (clk->ops->determine_rate) {
parent_hw = parent ? parent->hw : NULL;
- return clk->ops->determine_rate(clk->hw, rate,
- min_rate, max_rate,
- &parent_rate, &parent_hw);
+ if (clk->ops->determine_rate(clk->hw, &rate,
+ min_rate, max_rate,
+ &parent_rate, &parent_hw))
+ return 0;
+
+ return rate;
} else if (clk->ops->round_rate) {
if (clk->ops->round_rate(clk->hw, &rate, &parent_rate))
return 0;
@@ -1168,15 +1176,13 @@ static unsigned long clk_core_round_rate_nolock(struct clk_core *clk,
* Caller must hold prepare_lock. Useful for clk_ops such as .set_rate and
* .determine_rate.
*/
-unsigned long __clk_determine_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate)
+int __clk_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate, unsigned long max_rate)
{
if (!hw)
return 0;
- return clk_core_round_rate_nolock(hw->core, rate, min_rate, max_rate);
+ return clk_core_round_rate_nolock(hw->core, *rate, min_rate, max_rate);
}
EXPORT_SYMBOL_GPL(__clk_determine_rate);
@@ -1617,10 +1623,11 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *clk,
struct clk_core *old_parent, *parent;
struct clk_hw *parent_hw;
unsigned long best_parent_rate = 0;
- unsigned long new_rate;
+ unsigned long new_rate = rate;
unsigned long min_rate;
unsigned long max_rate;
int p_index = 0;
+ int ret;
/* sanity */
if (IS_ERR_OR_NULL(clk))
@@ -1636,11 +1643,14 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *clk,
/* find the closest rate and parent clk/rate */
if (clk->ops->determine_rate) {
parent_hw = parent ? parent->hw : NULL;
- new_rate = clk->ops->determine_rate(clk->hw, rate,
- min_rate,
- max_rate,
- &best_parent_rate,
- &parent_hw);
+ ret = clk->ops->determine_rate(clk->hw, &new_rate,
+ min_rate,
+ max_rate,
+ &best_parent_rate,
+ &parent_hw);
+ if (ret)
+ return NULL;
+
parent = parent_hw ? parent_hw->core : NULL;
} else if (clk->ops->round_rate) {
if (clk->ops->round_rate(clk->hw, &new_rate,
diff --git a/drivers/clk/hisilicon/clk-hi3620.c b/drivers/clk/hisilicon/clk-hi3620.c
index 2e4f6d4..f22885a 100644
--- a/drivers/clk/hisilicon/clk-hi3620.c
+++ b/drivers/clk/hisilicon/clk-hi3620.c
@@ -294,7 +294,7 @@ static unsigned long mmc_clk_recalc_rate(struct clk_hw *hw,
}
}
-static long mmc_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int mmc_clk_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
@@ -303,25 +303,25 @@ static long mmc_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
struct clk_mmc *mclk = to_mmc(hw);
unsigned long best = 0;
- if ((rate <= 13000000) && (mclk->id == HI3620_MMC_CIUCLK1)) {
- rate = 13000000;
+ if ((*rate <= 13000000) && (mclk->id == HI3620_MMC_CIUCLK1)) {
+ *rate = 13000000;
best = 26000000;
- } else if (rate <= 26000000) {
- rate = 25000000;
+ } else if (*rate <= 26000000) {
+ *rate = 25000000;
best = 180000000;
- } else if (rate <= 52000000) {
- rate = 50000000;
+ } else if (*rate <= 52000000) {
+ *rate = 50000000;
best = 360000000;
- } else if (rate <= 100000000) {
- rate = 100000000;
+ } else if (*rate <= 100000000) {
+ *rate = 100000000;
best = 720000000;
} else {
/* max is 180M */
- rate = 180000000;
+ *rate = 180000000;
best = 1440000000;
}
*best_parent_rate = best;
- return rate;
+ return 0;
}
static u32 mmc_clk_delay(u32 val, u32 para, u32 off, u32 len)
diff --git a/drivers/clk/mmp/clk-mix.c b/drivers/clk/mmp/clk-mix.c
index de6a873..e15bb57 100644
--- a/drivers/clk/mmp/clk-mix.c
+++ b/drivers/clk/mmp/clk-mix.c
@@ -201,11 +201,11 @@ error:
return ret;
}
-static long mmp_clk_mix_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+static int mmp_clk_mix_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
struct mmp_clk_mix *mix = to_clk_mix(hw);
struct mmp_clk_mix_clk_table *item;
@@ -233,7 +233,7 @@ static long mmp_clk_mix_determine_rate(struct clk_hw *hw, unsigned long rate,
item->parent_index);
parent_rate = __clk_get_rate(parent);
mix_rate = parent_rate / item->divisor;
- gap = abs(mix_rate - rate);
+ gap = abs(mix_rate - *rate);
if (parent_best == NULL || gap < gap_best) {
parent_best = parent;
parent_rate_best = parent_rate;
@@ -251,7 +251,7 @@ static long mmp_clk_mix_determine_rate(struct clk_hw *hw, unsigned long rate,
for (j = 0; j < div_val_max; j++) {
div = _get_div(mix, j);
mix_rate = parent_rate / div;
- gap = abs(mix_rate - rate);
+ gap = abs(mix_rate - *rate);
if (parent_best == NULL || gap < gap_best) {
parent_best = parent;
parent_rate_best = parent_rate;
@@ -267,8 +267,9 @@ static long mmp_clk_mix_determine_rate(struct clk_hw *hw, unsigned long rate,
found:
*best_parent_rate = parent_rate_best;
*best_parent_clk = __clk_get_hw(parent_best);
+ *rate = mix_rate_best;
- return mix_rate_best;
+ return 0;
}
static int mmp_clk_mix_set_rate_and_parent(struct clk_hw *hw,
diff --git a/drivers/clk/qcom/clk-pll.c b/drivers/clk/qcom/clk-pll.c
index b4325f6..2588952 100644
--- a/drivers/clk/qcom/clk-pll.c
+++ b/drivers/clk/qcom/clk-pll.c
@@ -139,19 +139,21 @@ struct pll_freq_tbl *find_freq(const struct pll_freq_tbl *f, unsigned long rate)
return NULL;
}
-static long
-clk_pll_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int
+clk_pll_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p)
{
struct clk_pll *pll = to_clk_pll(hw);
const struct pll_freq_tbl *f;
- f = find_freq(pll->freq_tbl, rate);
+ f = find_freq(pll->freq_tbl, *rate);
if (!f)
- return clk_pll_recalc_rate(hw, *p_rate);
+ *rate = clk_pll_recalc_rate(hw, *p_rate);
+ else
+ *rate = f->freq;
- return f->freq;
+ return 0;
}
static int
diff --git a/drivers/clk/qcom/clk-rcg.c b/drivers/clk/qcom/clk-rcg.c
index 8f2f480..727012f 100644
--- a/drivers/clk/qcom/clk-rcg.c
+++ b/drivers/clk/qcom/clk-rcg.c
@@ -404,38 +404,39 @@ clk_dyn_rcg_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
return calc_rate(parent_rate, m, n, mode, pre_div);
}
-static long _freq_tbl_determine_rate(struct clk_hw *hw,
- const struct freq_tbl *f, unsigned long rate,
+static int _freq_tbl_determine_rate(struct clk_hw *hw,
+ const struct freq_tbl *f, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p_hw)
{
- unsigned long clk_flags;
+ unsigned long clk_flags, parent_rate;
struct clk *p;
- f = qcom_find_freq(f, rate);
+ f = qcom_find_freq(f, *rate);
if (!f)
return -EINVAL;
clk_flags = __clk_get_flags(hw->clk);
p = clk_get_parent_by_index(hw->clk, f->src);
if (clk_flags & CLK_SET_RATE_PARENT) {
- rate = rate * f->pre_div;
+ parent_rate = *rate * f->pre_div;
if (f->n) {
- u64 tmp = rate;
+ u64 tmp = parent_rate;
tmp = tmp * f->n;
do_div(tmp, f->m);
- rate = tmp;
+ parent_rate = tmp;
}
} else {
- rate = __clk_get_rate(p);
+ parent_rate = __clk_get_rate(p);
}
*p_hw = __clk_get_hw(p);
- *p_rate = rate;
+ *p_rate = parent_rate;
+ *rate = f->freq;
- return f->freq;
+ return 0;
}
-static long clk_rcg_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_rcg_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p)
{
@@ -445,7 +446,7 @@ static long clk_rcg_determine_rate(struct clk_hw *hw, unsigned long rate,
max_rate, p_rate, p);
}
-static long clk_dyn_rcg_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_dyn_rcg_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p)
{
@@ -455,7 +456,7 @@ static long clk_dyn_rcg_determine_rate(struct clk_hw *hw, unsigned long rate,
max_rate, p_rate, p);
}
-static long clk_rcg_bypass_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_rcg_bypass_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p_hw)
{
@@ -465,9 +466,10 @@ static long clk_rcg_bypass_determine_rate(struct clk_hw *hw, unsigned long rate,
p = clk_get_parent_by_index(hw->clk, f->src);
*p_hw = __clk_get_hw(p);
- *p_rate = __clk_round_rate(p, rate);
+ *p_rate = __clk_round_rate(p, *rate);
+ *rate = *p_rate;
- return *p_rate;
+ return 0;
}
static int __clk_rcg_set_rate(struct clk_rcg *rcg, const struct freq_tbl *f)
diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
index 416becc..38ef3f2 100644
--- a/drivers/clk/qcom/clk-rcg2.c
+++ b/drivers/clk/qcom/clk-rcg2.c
@@ -176,14 +176,14 @@ clk_rcg2_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
return calc_rate(parent_rate, m, n, mode, hid_div);
}
-static long _freq_tbl_determine_rate(struct clk_hw *hw,
- const struct freq_tbl *f, unsigned long rate,
+static int _freq_tbl_determine_rate(struct clk_hw *hw,
+ const struct freq_tbl *f, unsigned long *rate,
unsigned long *p_rate, struct clk_hw **p_hw)
{
- unsigned long clk_flags;
+ unsigned long clk_flags, parent_rate = *rate;
struct clk *p;
- f = qcom_find_freq(f, rate);
+ f = qcom_find_freq(f, *rate);
if (!f)
return -EINVAL;
@@ -191,26 +191,27 @@ static long _freq_tbl_determine_rate(struct clk_hw *hw,
p = clk_get_parent_by_index(hw->clk, f->src);
if (clk_flags & CLK_SET_RATE_PARENT) {
if (f->pre_div) {
- rate /= 2;
- rate *= f->pre_div + 1;
+ parent_rate /= 2;
+ parent_rate *= f->pre_div + 1;
}
if (f->n) {
- u64 tmp = rate;
+ u64 tmp = parent_rate;
tmp = tmp * f->n;
do_div(tmp, f->m);
- rate = tmp;
+ parent_rate = tmp;
}
} else {
- rate = __clk_get_rate(p);
+ parent_rate = __clk_get_rate(p);
}
*p_hw = __clk_get_hw(p);
- *p_rate = rate;
+ *p_rate = parent_rate;
+ *rate = f->freq;
- return f->freq;
+ return 0;
}
-static long clk_rcg2_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_rcg2_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p)
{
@@ -368,7 +369,7 @@ static int clk_edp_pixel_set_rate_and_parent(struct clk_hw *hw,
return clk_edp_pixel_set_rate(hw, rate, parent_rate);
}
-static long clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p)
@@ -391,7 +392,7 @@ static long clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
frac = frac_table_675m;
for (; frac->num; frac++) {
- request = rate;
+ request = *rate;
request *= frac->den;
request = div_s64(request, frac->num);
if ((src_rate < (request - delta)) ||
@@ -403,8 +404,10 @@ static long clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
hid_div >>= CFG_SRC_DIV_SHIFT;
hid_div &= mask;
- return calc_rate(src_rate, frac->num, frac->den, !!frac->den,
- hid_div);
+ *rate = calc_rate(src_rate, frac->num, frac->den, !!frac->den,
+ hid_div);
+
+ return 0;
}
return -EINVAL;
@@ -421,7 +424,7 @@ const struct clk_ops clk_edp_pixel_ops = {
};
EXPORT_SYMBOL_GPL(clk_edp_pixel_ops);
-static long clk_byte_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_byte_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p_hw)
{
@@ -431,17 +434,19 @@ static long clk_byte_determine_rate(struct clk_hw *hw, unsigned long rate,
u32 mask = BIT(rcg->hid_width) - 1;
struct clk *p;
- if (rate == 0)
+ if (*rate == 0)
return -EINVAL;
p = clk_get_parent_by_index(hw->clk, f->src);
*p_hw = __clk_get_hw(p);
- *p_rate = parent_rate = __clk_round_rate(p, rate);
+ *p_rate = parent_rate = __clk_round_rate(p, *rate);
- div = DIV_ROUND_UP((2 * parent_rate), rate) - 1;
+ div = DIV_ROUND_UP((2 * parent_rate), *rate) - 1;
div = min_t(u32, div, mask);
- return calc_rate(parent_rate, 0, 0, 0, div);
+ *rate = calc_rate(parent_rate, 0, 0, 0, div);
+
+ return 0;
}
static int clk_byte_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -486,7 +491,7 @@ static const struct frac_entry frac_table_pixel[] = {
{ }
};
-static long clk_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pixel_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p)
@@ -501,7 +506,7 @@ static long clk_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
*p = __clk_get_hw(parent);
for (; frac->num; frac++) {
- request = (rate * frac->den) / frac->num;
+ request = (*rate * frac->den) / frac->num;
src_rate = __clk_round_rate(parent, request);
if ((src_rate < (request - delta)) ||
@@ -509,7 +514,9 @@ static long clk_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
continue;
*p_rate = src_rate;
- return (src_rate * frac->num) / frac->den;
+ *rate = (src_rate * frac->num) / frac->den;
+
+ return 0;
}
return -EINVAL;
diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factors.c
index 5865300..1cef6a5 100644
--- a/drivers/clk/sunxi/clk-factors.c
+++ b/drivers/clk/sunxi/clk-factors.c
@@ -82,11 +82,11 @@ static int clk_factors_round_rate(struct clk_hw *hw, unsigned long *rate,
return 0;
}
-static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_p)
+static int clk_factors_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_p)
{
struct clk *clk = hw->clk, *parent, *best_parent = NULL;
int i, num_parents;
@@ -99,14 +99,14 @@ static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
if (!parent)
continue;
if (__clk_get_flags(clk) & CLK_SET_RATE_PARENT)
- parent_rate = __clk_round_rate(parent, rate);
+ parent_rate = __clk_round_rate(parent, *rate);
else
parent_rate = __clk_get_rate(parent);
- child_rate = rate;
+ child_rate = *rate;
clk_factors_round_rate(hw, &child_rate, &parent_rate);
- if (child_rate <= rate && child_rate > best_child_rate) {
+ if (child_rate <= *rate && child_rate > best_child_rate) {
best_parent = parent;
best = parent_rate;
best_child_rate = child_rate;
@@ -116,8 +116,9 @@ static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
if (best_parent)
*best_parent_p = __clk_get_hw(best_parent);
*best_parent_rate = best;
+ *rate = best_child_rate;
- return best_child_rate;
+ return 0;
}
static int clk_factors_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/sunxi/clk-sun6i-ar100.c b/drivers/clk/sunxi/clk-sun6i-ar100.c
index 63cf149..f398190 100644
--- a/drivers/clk/sunxi/clk-sun6i-ar100.c
+++ b/drivers/clk/sunxi/clk-sun6i-ar100.c
@@ -44,11 +44,11 @@ static unsigned long ar100_recalc_rate(struct clk_hw *hw,
return (parent_rate >> shift) / (div + 1);
}
-static long ar100_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+static int ar100_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
int nparents = __clk_get_num_parents(hw->clk);
long best_rate = -EINVAL;
@@ -65,7 +65,7 @@ static long ar100_determine_rate(struct clk_hw *hw, unsigned long rate,
parent = clk_get_parent_by_index(hw->clk, i);
parent_rate = __clk_get_rate(parent);
- div = DIV_ROUND_UP(parent_rate, rate);
+ div = DIV_ROUND_UP(parent_rate, *rate);
/*
* The AR100 clk contains 2 divisors:
@@ -108,7 +108,11 @@ static long ar100_determine_rate(struct clk_hw *hw, unsigned long rate,
}
}
- return best_rate;
+ if (best_rate < 0)
+ return best_rate;
+
+ *rate = best_rate;
+ return 0;
}
static int ar100_set_parent(struct clk_hw *hw, u8 index)
diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
index 7e1e2bd..3f2420f 100644
--- a/drivers/clk/sunxi/clk-sunxi.c
+++ b/drivers/clk/sunxi/clk-sunxi.c
@@ -118,11 +118,11 @@ static long sun6i_ahb1_clk_round(unsigned long rate, u8 *divp, u8 *pre_divp,
return (parent_rate / calcm) >> calcp;
}
-static long sun6i_ahb1_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+static int sun6i_ahb1_clk_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
struct clk *clk = hw->clk, *parent, *best_parent = NULL;
int i, num_parents;
@@ -135,14 +135,14 @@ static long sun6i_ahb1_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
if (!parent)
continue;
if (__clk_get_flags(clk) & CLK_SET_RATE_PARENT)
- parent_rate = __clk_round_rate(parent, rate);
+ parent_rate = __clk_round_rate(parent, *rate);
else
parent_rate = __clk_get_rate(parent);
- child_rate = sun6i_ahb1_clk_round(rate, NULL, NULL, i,
+ child_rate = sun6i_ahb1_clk_round(*rate, NULL, NULL, i,
parent_rate);
- if (child_rate <= rate && child_rate > best_child_rate) {
+ if (child_rate <= *rate && child_rate > best_child_rate) {
best_parent = parent;
best = parent_rate;
best_child_rate = child_rate;
@@ -152,8 +152,9 @@ static long sun6i_ahb1_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
if (best_parent)
*best_parent_clk = __clk_get_hw(best_parent);
*best_parent_rate = best;
+ *rate = best_child_rate;
- return best_child_rate;
+ return 0;
}
static int sun6i_ahb1_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 1213b0b..51d67de 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -175,8 +175,8 @@ struct clk_ops {
unsigned long parent_rate);
int (*round_rate)(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate);
- long (*determine_rate)(struct clk_hw *hw,
- unsigned long rate,
+ int (*determine_rate)(struct clk_hw *hw,
+ unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
@@ -575,16 +575,16 @@ unsigned long __clk_get_flags(struct clk *clk);
bool __clk_is_prepared(struct clk *clk);
bool __clk_is_enabled(struct clk *clk);
struct clk *__clk_lookup(const char *name);
-long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_p);
-unsigned long __clk_determine_rate(struct clk_hw *core,
- unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate);
-long __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long rate,
+int __clk_mux_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_p);
+int __clk_determine_rate(struct clk_hw *core,
+ unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate);
+int __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h
index 3b2406c..1df140f 100644
--- a/include/linux/clk/ti.h
+++ b/include/linux/clk/ti.h
@@ -269,23 +269,23 @@ int omap3_noncore_dpll_set_rate_and_parent(struct clk_hw *hw,
unsigned long rate,
unsigned long parent_rate,
u8 index);
-long omap3_noncore_dpll_determine_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk);
+int omap3_noncore_dpll_determine_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk);
unsigned long omap4_dpll_regm4xen_recalc(struct clk_hw *hw,
unsigned long parent_rate);
int omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
unsigned long *target_rate,
unsigned long *parent_rate);
-long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk);
+int omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk);
u8 omap2_init_dpll_parent(struct clk_hw *hw);
unsigned long omap3_dpll_recalc(struct clk_hw *hw, unsigned long parent_rate);
int omap2_dpll_round_rate(struct clk_hw *hw, unsigned long *target_rate,
--
1.9.1
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH 2/2] clk: change clk_ops' ->determine_rate() prototype
@ 2015-04-17 7:29 ` Boris Brezillon
0 siblings, 0 replies; 18+ messages in thread
From: Boris Brezillon @ 2015-04-17 7:29 UTC (permalink / raw)
To: linux-arm-kernel
Clock rates are stored in an unsigned long field, but ->determine_rate()
(which returns a rounded rate from a requested one) returns a long
value (errors are reported using negative error codes), which can lead
to long overflow if the clock rate exceed 2Ghz.
Change ->determine_rate() prototype to return 0 or an error code, and pass
the requested rate as a pointer so that it can be adjusted depending on
hardware capabilities.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
CC: Jonathan Corbet <corbet@lwn.net>
CC: Tony Lindgren <tony@atomide.com>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: "Emilio L?pez" <emilio@elopez.com.ar>
CC: Maxime Ripard <maxime.ripard@free-electrons.com>
CC: Tero Kristo <t-kristo@ti.com>
CC: linux-doc at vger.kernel.org
CC: linux-kernel at vger.kernel.org
CC: linux-arm-kernel at lists.infradead.org
CC: linux-omap at vger.kernel.org
CC: linux-mips at linux-mips.org
Documentation/clk.txt | 4 +--
arch/arm/mach-omap2/dpll3xxx.c | 20 +++++------
arch/arm/mach-omap2/dpll44xx.c | 20 +++++------
arch/mips/alchemy/common/clock.c | 63 +++++++++++++++++++++-----------
drivers/clk/at91/clk-programmable.c | 28 +++++++++------
drivers/clk/bcm/clk-kona.c | 24 ++++++++-----
drivers/clk/clk-composite.c | 22 ++++++------
drivers/clk/clk.c | 72 +++++++++++++++++++++----------------
drivers/clk/hisilicon/clk-hi3620.c | 22 ++++++------
drivers/clk/mmp/clk-mix.c | 17 ++++-----
drivers/clk/qcom/clk-pll.c | 12 ++++---
drivers/clk/qcom/clk-rcg.c | 32 +++++++++--------
drivers/clk/qcom/clk-rcg2.c | 55 +++++++++++++++-------------
drivers/clk/sunxi/clk-factors.c | 19 +++++-----
drivers/clk/sunxi/clk-sun6i-ar100.c | 18 ++++++----
drivers/clk/sunxi/clk-sunxi.c | 19 +++++-----
include/linux/clk-provider.h | 24 ++++++-------
include/linux/clk/ti.h | 24 ++++++-------
18 files changed, 278 insertions(+), 217 deletions(-)
diff --git a/Documentation/clk.txt b/Documentation/clk.txt
index fca8b7a..f5cae13 100644
--- a/Documentation/clk.txt
+++ b/Documentation/clk.txt
@@ -71,8 +71,8 @@ the operations defined in clk.h:
int (*round_rate)(struct clk_hw *hw,
unsigned long *rate,
unsigned long *parent_rate);
- long (*determine_rate)(struct clk_hw *hw,
- unsigned long rate,
+ int (*determine_rate)(struct clk_hw *hw,
+ unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
diff --git a/arch/arm/mach-omap2/dpll3xxx.c b/arch/arm/mach-omap2/dpll3xxx.c
index 7a6fb45..cfa24fd 100644
--- a/arch/arm/mach-omap2/dpll3xxx.c
+++ b/arch/arm/mach-omap2/dpll3xxx.c
@@ -472,37 +472,37 @@ void omap3_noncore_dpll_disable(struct clk_hw *hw)
* Returns a positive clock rate with success, negative error value
* in failure.
*/
-long omap3_noncore_dpll_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+int omap3_noncore_dpll_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
struct dpll_data *dd;
int ret;
- if (!hw || !rate)
+ if (!hw || !*rate)
return -EINVAL;
dd = clk->dpll_data;
if (!dd)
return -EINVAL;
- if (__clk_get_rate(dd->clk_bypass) == rate &&
+ if (__clk_get_rate(dd->clk_bypass) == *rate &&
(dd->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
*best_parent_clk = __clk_get_hw(dd->clk_bypass);
} else {
- ret = omap2_dpll_round_rate(hw, &rate, best_parent_rate);
+ ret = omap2_dpll_round_rate(hw, rate, best_parent_rate);
if (ret)
return ret;
*best_parent_clk = __clk_get_hw(dd->clk_ref);
}
- *best_parent_rate = rate;
+ *best_parent_rate = *rate;
- return rate;
+ return 0;
}
/**
diff --git a/arch/arm/mach-omap2/dpll44xx.c b/arch/arm/mach-omap2/dpll44xx.c
index afd3284..1571d41 100644
--- a/arch/arm/mach-omap2/dpll44xx.c
+++ b/arch/arm/mach-omap2/dpll44xx.c
@@ -203,28 +203,28 @@ out:
* Returns a positive clock rate with success, negative error value
* in failure.
*/
-long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+int omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
struct dpll_data *dd;
int ret;
- if (!hw || !rate)
+ if (!hw || !*rate)
return -EINVAL;
dd = clk->dpll_data;
if (!dd)
return -EINVAL;
- if (__clk_get_rate(dd->clk_bypass) == rate &&
+ if (__clk_get_rate(dd->clk_bypass) == *rate &&
(dd->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
*best_parent_clk = __clk_get_hw(dd->clk_bypass);
} else {
- ret = omap4_dpll_regm4xen_round_rate(hw, &rate,
+ ret = omap4_dpll_regm4xen_round_rate(hw, rate,
best_parent_rate);
if (ret)
return ret;
@@ -232,7 +232,7 @@ long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw, unsigned long rate,
*best_parent_clk = __clk_get_hw(dd->clk_ref);
}
- *best_parent_rate = rate;
+ *best_parent_rate = *rate;
- return rate;
+ return 0;
}
diff --git a/arch/mips/alchemy/common/clock.c b/arch/mips/alchemy/common/clock.c
index d697d8f..0abcfc6 100644
--- a/arch/mips/alchemy/common/clock.c
+++ b/arch/mips/alchemy/common/clock.c
@@ -565,14 +565,22 @@ static unsigned long alchemy_clk_fgv1_recalc(struct clk_hw *hw,
return parent_rate / v;
}
-static long alchemy_clk_fgv1_detr(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+static int alchemy_clk_fgv1_detr(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
- return alchemy_clk_fgcs_detr(hw, rate, best_parent_rate,
- best_parent_clk, 2, 512);
+ long ret;
+
+ ret = alchemy_clk_fgcs_detr(hw, *rate, best_parent_rate,
+ best_parent_clk, 2, 512);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+
+ return 0;
}
/* Au1000, Au1100, Au15x0, Au12x0 */
@@ -699,14 +707,15 @@ static unsigned long alchemy_clk_fgv2_recalc(struct clk_hw *hw,
return t;
}
-static long alchemy_clk_fgv2_detr(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+static int alchemy_clk_fgv2_detr(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
struct alchemy_fgcs_clk *c = to_fgcs_clk(hw);
int scale, maxdiv;
+ long ret;
if (alchemy_rdsys(c->reg) & (1 << 30)) {
scale = 1;
@@ -716,8 +725,13 @@ static long alchemy_clk_fgv2_detr(struct clk_hw *hw, unsigned long rate,
maxdiv = 512;
}
- return alchemy_clk_fgcs_detr(hw, rate, best_parent_rate,
- best_parent_clk, scale, maxdiv);
+ ret = alchemy_clk_fgcs_detr(hw, *rate, best_parent_rate,
+ best_parent_clk, scale, maxdiv);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
}
/* Au1300 larger input mux, no separate disable bit, flexible divider */
@@ -920,17 +934,24 @@ static int alchemy_clk_csrc_setr(struct clk_hw *hw, unsigned long rate,
return 0;
}
-static long alchemy_clk_csrc_detr(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+static int alchemy_clk_csrc_detr(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
struct alchemy_fgcs_clk *c = to_fgcs_clk(hw);
int scale = c->dt[2] == 3 ? 1 : 2; /* au1300 check */
+ long ret;
- return alchemy_clk_fgcs_detr(hw, rate, best_parent_rate,
- best_parent_clk, scale, 4);
+ ret = alchemy_clk_fgcs_detr(hw, *rate, best_parent_rate,
+ best_parent_clk, scale, 4);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+
+ return 0;
}
static struct clk_ops alchemy_clkops_csrc = {
diff --git a/drivers/clk/at91/clk-programmable.c b/drivers/clk/at91/clk-programmable.c
index 86c8a07..5f9570d 100644
--- a/drivers/clk/at91/clk-programmable.c
+++ b/drivers/clk/at91/clk-programmable.c
@@ -54,17 +54,18 @@ static unsigned long clk_programmable_recalc_rate(struct clk_hw *hw,
return parent_rate >> pres;
}
-static long clk_programmable_determine_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_hw)
+static int clk_programmable_determine_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_hw)
{
struct clk *parent = NULL;
- long best_rate = -EINVAL;
unsigned long parent_rate;
+ unsigned long best_rate;
unsigned long tmp_rate;
+ int ret = -EINVAL;
int shift;
int i;
@@ -76,24 +77,29 @@ static long clk_programmable_determine_rate(struct clk_hw *hw,
parent_rate = __clk_get_rate(parent);
for (shift = 0; shift < PROG_PRES_MASK; shift++) {
tmp_rate = parent_rate >> shift;
- if (tmp_rate <= rate)
+ if (tmp_rate <= *rate)
break;
}
- if (tmp_rate > rate)
+ if (tmp_rate > *rate)
continue;
- if (best_rate < 0 || (rate - tmp_rate) < (rate - best_rate)) {
+ if (best_rate < 0 || (*rate - tmp_rate) < (*rate - best_rate)) {
best_rate = tmp_rate;
*best_parent_rate = parent_rate;
*best_parent_hw = __clk_get_hw(parent);
+ ret = 0;
}
if (!best_rate)
break;
}
- return best_rate;
+ if (ret)
+ return ret;
+
+ *rate = best_rate;
+ return 0;
}
static int clk_programmable_set_parent(struct clk_hw *hw, u8 index)
diff --git a/drivers/clk/bcm/clk-kona.c b/drivers/clk/bcm/clk-kona.c
index 05abae8..4a2a66b 100644
--- a/drivers/clk/bcm/clk-kona.c
+++ b/drivers/clk/bcm/clk-kona.c
@@ -1031,7 +1031,7 @@ static long kona_peri_clk_round_rate(struct clk_hw *hw, unsigned long rate,
rate ? rate : 1, *parent_rate, NULL);
}
-static long kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate, struct clk_hw **best_parent)
@@ -1044,6 +1044,7 @@ static long kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long best_rate;
u32 parent_count;
u32 which;
+ long ret;
/*
* If there is no other parent to choose, use the current one.
@@ -1051,14 +1052,20 @@ static long kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
*/
WARN_ON_ONCE(bcm_clk->init_data.flags & CLK_SET_RATE_NO_REPARENT);
parent_count = (u32)bcm_clk->init_data.num_parents;
- if (parent_count < 2)
- return kona_peri_clk_round_rate(hw, rate, best_parent_rate);
+ if (parent_count < 2) {
+ ret = kona_peri_clk_round_rate(hw, *rate, best_parent_rate);
+ if (ret < 0)
+ return ret;
+
+ *rate = ret;
+ return 0;
+ }
/* Unless we can do better, stick with current parent */
current_parent = clk_get_parent(clk);
parent_rate = __clk_get_rate(current_parent);
- best_rate = kona_peri_clk_round_rate(hw, rate, &parent_rate);
- best_delta = abs(best_rate - rate);
+ best_rate = kona_peri_clk_round_rate(hw, *rate, &parent_rate);
+ best_delta = abs(best_rate - *rate);
/* Check whether any other parent clock can produce a better result */
for (which = 0; which < parent_count; which++) {
@@ -1072,8 +1079,8 @@ static long kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
/* We don't support CLK_SET_RATE_PARENT */
parent_rate = __clk_get_rate(parent);
- other_rate = kona_peri_clk_round_rate(hw, rate, &parent_rate);
- delta = abs(other_rate - rate);
+ other_rate = kona_peri_clk_round_rate(hw, *rate, &parent_rate);
+ delta = abs(other_rate - *rate);
if (delta < best_delta) {
best_delta = delta;
best_rate = other_rate;
@@ -1082,7 +1089,8 @@ static long kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
}
}
- return best_rate;
+ *rate = best_rate;
+ return 0;
}
static int kona_peri_clk_set_parent(struct clk_hw *hw, u8 index)
diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c
index f56a71d..45c2b51 100644
--- a/drivers/clk/clk-composite.c
+++ b/drivers/clk/clk-composite.c
@@ -55,7 +55,7 @@ static unsigned long clk_composite_recalc_rate(struct clk_hw *hw,
return rate_ops->recalc_rate(rate_hw, parent_rate);
}
-static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_composite_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
@@ -88,12 +88,8 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
*best_parent_p = __clk_get_hw(parent);
*best_parent_rate = __clk_get_rate(parent);
- ret = rate_ops->round_rate(rate_hw, &rate,
- best_parent_rate);
- if (ret)
- return ret;
-
- return rate;
+ return rate_ops->round_rate(rate_hw, rate,
+ best_parent_rate);
}
for (i = 0; i < __clk_get_num_parents(mux_hw->clk); i++) {
@@ -103,13 +99,13 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
parent_rate = __clk_get_rate(parent);
- tmp_rate = rate;
+ tmp_rate = *rate;
ret = rate_ops->round_rate(rate_hw, &tmp_rate,
&parent_rate);
if (ret < 0)
continue;
- rate_diff = abs(rate - tmp_rate);
+ rate_diff = abs(*rate - tmp_rate);
if (!rate_diff || !*best_parent_p
|| best_rate_diff > rate_diff) {
@@ -120,10 +116,10 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
}
if (!rate_diff)
- return rate;
+ break;
}
- return best_rate;
+ *rate = best_rate;
} else if (mux_hw && mux_ops && mux_ops->determine_rate) {
__clk_hw_set_clk(mux_hw, hw);
return mux_ops->determine_rate(mux_hw, rate, min_rate,
@@ -131,8 +127,10 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
best_parent_p);
} else {
pr_err("clk: clk_composite_determine_rate function called, but no mux or rate callback set!\n");
- return 0;
+ *rate = 0;
}
+
+ return 0;
}
static int clk_composite_round_rate(struct clk_hw *hw, unsigned long *rate,
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 1462ddc..f42a639 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -795,8 +795,8 @@ static bool mux_is_better_rate(unsigned long rate, unsigned long now,
return now <= rate && now > best;
}
-static long
-clk_mux_determine_rate_flags(struct clk_hw *hw, unsigned long rate,
+static int
+clk_mux_determine_rate_flags(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
@@ -804,15 +804,15 @@ clk_mux_determine_rate_flags(struct clk_hw *hw, unsigned long rate,
unsigned long flags)
{
struct clk_core *core = hw->core, *parent, *best_parent = NULL;
- int i, num_parents;
- unsigned long parent_rate, best = 0;
+ int i, num_parents, ret = 0;
+ unsigned long parent_rate = *rate, best = *rate;
/* if NO_REPARENT flag set, pass through to current parent */
if (core->flags & CLK_SET_RATE_NO_REPARENT) {
parent = core->parent;
if (core->flags & CLK_SET_RATE_PARENT)
- best = __clk_determine_rate(parent ? parent->hw : NULL,
- rate, min_rate, max_rate);
+ ret = __clk_determine_rate(parent ? parent->hw : NULL,
+ &best, min_rate, max_rate);
else if (parent)
best = clk_core_get_rate_nolock(parent);
else
@@ -827,23 +827,28 @@ clk_mux_determine_rate_flags(struct clk_hw *hw, unsigned long rate,
if (!parent)
continue;
if (core->flags & CLK_SET_RATE_PARENT)
- parent_rate = __clk_determine_rate(parent->hw, rate,
- min_rate,
- max_rate);
+ ret = __clk_determine_rate(parent->hw, &parent_rate,
+ min_rate,
+ max_rate);
else
parent_rate = clk_core_get_rate_nolock(parent);
- if (mux_is_better_rate(rate, parent_rate, best, flags)) {
+ if (!ret &&
+ mux_is_better_rate(*rate, parent_rate, best, flags)) {
best_parent = parent;
best = parent_rate;
}
}
out:
+ if (ret)
+ return ret;
+
if (best_parent)
*best_parent_p = best_parent->hw;
*best_parent_rate = best;
+ *rate = best;
- return best;
+ return 0;
}
struct clk *__clk_lookup(const char *name)
@@ -874,11 +879,11 @@ static void clk_core_get_boundaries(struct clk_core *clk,
* directly as a determine_rate callback (e.g. for a mux), or from a more
* complex clock that may combine a mux with other operations.
*/
-long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_p)
+int __clk_mux_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_p)
{
return clk_mux_determine_rate_flags(hw, rate, min_rate, max_rate,
best_parent_rate,
@@ -886,7 +891,7 @@ long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
}
EXPORT_SYMBOL_GPL(__clk_mux_determine_rate);
-long __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long rate,
+int __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
@@ -1143,9 +1148,12 @@ static unsigned long clk_core_round_rate_nolock(struct clk_core *clk,
if (clk->ops->determine_rate) {
parent_hw = parent ? parent->hw : NULL;
- return clk->ops->determine_rate(clk->hw, rate,
- min_rate, max_rate,
- &parent_rate, &parent_hw);
+ if (clk->ops->determine_rate(clk->hw, &rate,
+ min_rate, max_rate,
+ &parent_rate, &parent_hw))
+ return 0;
+
+ return rate;
} else if (clk->ops->round_rate) {
if (clk->ops->round_rate(clk->hw, &rate, &parent_rate))
return 0;
@@ -1168,15 +1176,13 @@ static unsigned long clk_core_round_rate_nolock(struct clk_core *clk,
* Caller must hold prepare_lock. Useful for clk_ops such as .set_rate and
* .determine_rate.
*/
-unsigned long __clk_determine_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate)
+int __clk_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate, unsigned long max_rate)
{
if (!hw)
return 0;
- return clk_core_round_rate_nolock(hw->core, rate, min_rate, max_rate);
+ return clk_core_round_rate_nolock(hw->core, *rate, min_rate, max_rate);
}
EXPORT_SYMBOL_GPL(__clk_determine_rate);
@@ -1617,10 +1623,11 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *clk,
struct clk_core *old_parent, *parent;
struct clk_hw *parent_hw;
unsigned long best_parent_rate = 0;
- unsigned long new_rate;
+ unsigned long new_rate = rate;
unsigned long min_rate;
unsigned long max_rate;
int p_index = 0;
+ int ret;
/* sanity */
if (IS_ERR_OR_NULL(clk))
@@ -1636,11 +1643,14 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *clk,
/* find the closest rate and parent clk/rate */
if (clk->ops->determine_rate) {
parent_hw = parent ? parent->hw : NULL;
- new_rate = clk->ops->determine_rate(clk->hw, rate,
- min_rate,
- max_rate,
- &best_parent_rate,
- &parent_hw);
+ ret = clk->ops->determine_rate(clk->hw, &new_rate,
+ min_rate,
+ max_rate,
+ &best_parent_rate,
+ &parent_hw);
+ if (ret)
+ return NULL;
+
parent = parent_hw ? parent_hw->core : NULL;
} else if (clk->ops->round_rate) {
if (clk->ops->round_rate(clk->hw, &new_rate,
diff --git a/drivers/clk/hisilicon/clk-hi3620.c b/drivers/clk/hisilicon/clk-hi3620.c
index 2e4f6d4..f22885a 100644
--- a/drivers/clk/hisilicon/clk-hi3620.c
+++ b/drivers/clk/hisilicon/clk-hi3620.c
@@ -294,7 +294,7 @@ static unsigned long mmc_clk_recalc_rate(struct clk_hw *hw,
}
}
-static long mmc_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int mmc_clk_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
@@ -303,25 +303,25 @@ static long mmc_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
struct clk_mmc *mclk = to_mmc(hw);
unsigned long best = 0;
- if ((rate <= 13000000) && (mclk->id == HI3620_MMC_CIUCLK1)) {
- rate = 13000000;
+ if ((*rate <= 13000000) && (mclk->id == HI3620_MMC_CIUCLK1)) {
+ *rate = 13000000;
best = 26000000;
- } else if (rate <= 26000000) {
- rate = 25000000;
+ } else if (*rate <= 26000000) {
+ *rate = 25000000;
best = 180000000;
- } else if (rate <= 52000000) {
- rate = 50000000;
+ } else if (*rate <= 52000000) {
+ *rate = 50000000;
best = 360000000;
- } else if (rate <= 100000000) {
- rate = 100000000;
+ } else if (*rate <= 100000000) {
+ *rate = 100000000;
best = 720000000;
} else {
/* max is 180M */
- rate = 180000000;
+ *rate = 180000000;
best = 1440000000;
}
*best_parent_rate = best;
- return rate;
+ return 0;
}
static u32 mmc_clk_delay(u32 val, u32 para, u32 off, u32 len)
diff --git a/drivers/clk/mmp/clk-mix.c b/drivers/clk/mmp/clk-mix.c
index de6a873..e15bb57 100644
--- a/drivers/clk/mmp/clk-mix.c
+++ b/drivers/clk/mmp/clk-mix.c
@@ -201,11 +201,11 @@ error:
return ret;
}
-static long mmp_clk_mix_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+static int mmp_clk_mix_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
struct mmp_clk_mix *mix = to_clk_mix(hw);
struct mmp_clk_mix_clk_table *item;
@@ -233,7 +233,7 @@ static long mmp_clk_mix_determine_rate(struct clk_hw *hw, unsigned long rate,
item->parent_index);
parent_rate = __clk_get_rate(parent);
mix_rate = parent_rate / item->divisor;
- gap = abs(mix_rate - rate);
+ gap = abs(mix_rate - *rate);
if (parent_best == NULL || gap < gap_best) {
parent_best = parent;
parent_rate_best = parent_rate;
@@ -251,7 +251,7 @@ static long mmp_clk_mix_determine_rate(struct clk_hw *hw, unsigned long rate,
for (j = 0; j < div_val_max; j++) {
div = _get_div(mix, j);
mix_rate = parent_rate / div;
- gap = abs(mix_rate - rate);
+ gap = abs(mix_rate - *rate);
if (parent_best == NULL || gap < gap_best) {
parent_best = parent;
parent_rate_best = parent_rate;
@@ -267,8 +267,9 @@ static long mmp_clk_mix_determine_rate(struct clk_hw *hw, unsigned long rate,
found:
*best_parent_rate = parent_rate_best;
*best_parent_clk = __clk_get_hw(parent_best);
+ *rate = mix_rate_best;
- return mix_rate_best;
+ return 0;
}
static int mmp_clk_mix_set_rate_and_parent(struct clk_hw *hw,
diff --git a/drivers/clk/qcom/clk-pll.c b/drivers/clk/qcom/clk-pll.c
index b4325f6..2588952 100644
--- a/drivers/clk/qcom/clk-pll.c
+++ b/drivers/clk/qcom/clk-pll.c
@@ -139,19 +139,21 @@ struct pll_freq_tbl *find_freq(const struct pll_freq_tbl *f, unsigned long rate)
return NULL;
}
-static long
-clk_pll_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int
+clk_pll_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p)
{
struct clk_pll *pll = to_clk_pll(hw);
const struct pll_freq_tbl *f;
- f = find_freq(pll->freq_tbl, rate);
+ f = find_freq(pll->freq_tbl, *rate);
if (!f)
- return clk_pll_recalc_rate(hw, *p_rate);
+ *rate = clk_pll_recalc_rate(hw, *p_rate);
+ else
+ *rate = f->freq;
- return f->freq;
+ return 0;
}
static int
diff --git a/drivers/clk/qcom/clk-rcg.c b/drivers/clk/qcom/clk-rcg.c
index 8f2f480..727012f 100644
--- a/drivers/clk/qcom/clk-rcg.c
+++ b/drivers/clk/qcom/clk-rcg.c
@@ -404,38 +404,39 @@ clk_dyn_rcg_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
return calc_rate(parent_rate, m, n, mode, pre_div);
}
-static long _freq_tbl_determine_rate(struct clk_hw *hw,
- const struct freq_tbl *f, unsigned long rate,
+static int _freq_tbl_determine_rate(struct clk_hw *hw,
+ const struct freq_tbl *f, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p_hw)
{
- unsigned long clk_flags;
+ unsigned long clk_flags, parent_rate;
struct clk *p;
- f = qcom_find_freq(f, rate);
+ f = qcom_find_freq(f, *rate);
if (!f)
return -EINVAL;
clk_flags = __clk_get_flags(hw->clk);
p = clk_get_parent_by_index(hw->clk, f->src);
if (clk_flags & CLK_SET_RATE_PARENT) {
- rate = rate * f->pre_div;
+ parent_rate = *rate * f->pre_div;
if (f->n) {
- u64 tmp = rate;
+ u64 tmp = parent_rate;
tmp = tmp * f->n;
do_div(tmp, f->m);
- rate = tmp;
+ parent_rate = tmp;
}
} else {
- rate = __clk_get_rate(p);
+ parent_rate = __clk_get_rate(p);
}
*p_hw = __clk_get_hw(p);
- *p_rate = rate;
+ *p_rate = parent_rate;
+ *rate = f->freq;
- return f->freq;
+ return 0;
}
-static long clk_rcg_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_rcg_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p)
{
@@ -445,7 +446,7 @@ static long clk_rcg_determine_rate(struct clk_hw *hw, unsigned long rate,
max_rate, p_rate, p);
}
-static long clk_dyn_rcg_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_dyn_rcg_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p)
{
@@ -455,7 +456,7 @@ static long clk_dyn_rcg_determine_rate(struct clk_hw *hw, unsigned long rate,
max_rate, p_rate, p);
}
-static long clk_rcg_bypass_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_rcg_bypass_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p_hw)
{
@@ -465,9 +466,10 @@ static long clk_rcg_bypass_determine_rate(struct clk_hw *hw, unsigned long rate,
p = clk_get_parent_by_index(hw->clk, f->src);
*p_hw = __clk_get_hw(p);
- *p_rate = __clk_round_rate(p, rate);
+ *p_rate = __clk_round_rate(p, *rate);
+ *rate = *p_rate;
- return *p_rate;
+ return 0;
}
static int __clk_rcg_set_rate(struct clk_rcg *rcg, const struct freq_tbl *f)
diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
index 416becc..38ef3f2 100644
--- a/drivers/clk/qcom/clk-rcg2.c
+++ b/drivers/clk/qcom/clk-rcg2.c
@@ -176,14 +176,14 @@ clk_rcg2_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
return calc_rate(parent_rate, m, n, mode, hid_div);
}
-static long _freq_tbl_determine_rate(struct clk_hw *hw,
- const struct freq_tbl *f, unsigned long rate,
+static int _freq_tbl_determine_rate(struct clk_hw *hw,
+ const struct freq_tbl *f, unsigned long *rate,
unsigned long *p_rate, struct clk_hw **p_hw)
{
- unsigned long clk_flags;
+ unsigned long clk_flags, parent_rate = *rate;
struct clk *p;
- f = qcom_find_freq(f, rate);
+ f = qcom_find_freq(f, *rate);
if (!f)
return -EINVAL;
@@ -191,26 +191,27 @@ static long _freq_tbl_determine_rate(struct clk_hw *hw,
p = clk_get_parent_by_index(hw->clk, f->src);
if (clk_flags & CLK_SET_RATE_PARENT) {
if (f->pre_div) {
- rate /= 2;
- rate *= f->pre_div + 1;
+ parent_rate /= 2;
+ parent_rate *= f->pre_div + 1;
}
if (f->n) {
- u64 tmp = rate;
+ u64 tmp = parent_rate;
tmp = tmp * f->n;
do_div(tmp, f->m);
- rate = tmp;
+ parent_rate = tmp;
}
} else {
- rate = __clk_get_rate(p);
+ parent_rate = __clk_get_rate(p);
}
*p_hw = __clk_get_hw(p);
- *p_rate = rate;
+ *p_rate = parent_rate;
+ *rate = f->freq;
- return f->freq;
+ return 0;
}
-static long clk_rcg2_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_rcg2_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p)
{
@@ -368,7 +369,7 @@ static int clk_edp_pixel_set_rate_and_parent(struct clk_hw *hw,
return clk_edp_pixel_set_rate(hw, rate, parent_rate);
}
-static long clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p)
@@ -391,7 +392,7 @@ static long clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
frac = frac_table_675m;
for (; frac->num; frac++) {
- request = rate;
+ request = *rate;
request *= frac->den;
request = div_s64(request, frac->num);
if ((src_rate < (request - delta)) ||
@@ -403,8 +404,10 @@ static long clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
hid_div >>= CFG_SRC_DIV_SHIFT;
hid_div &= mask;
- return calc_rate(src_rate, frac->num, frac->den, !!frac->den,
- hid_div);
+ *rate = calc_rate(src_rate, frac->num, frac->den, !!frac->den,
+ hid_div);
+
+ return 0;
}
return -EINVAL;
@@ -421,7 +424,7 @@ const struct clk_ops clk_edp_pixel_ops = {
};
EXPORT_SYMBOL_GPL(clk_edp_pixel_ops);
-static long clk_byte_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_byte_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate, unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p_hw)
{
@@ -431,17 +434,19 @@ static long clk_byte_determine_rate(struct clk_hw *hw, unsigned long rate,
u32 mask = BIT(rcg->hid_width) - 1;
struct clk *p;
- if (rate == 0)
+ if (*rate == 0)
return -EINVAL;
p = clk_get_parent_by_index(hw->clk, f->src);
*p_hw = __clk_get_hw(p);
- *p_rate = parent_rate = __clk_round_rate(p, rate);
+ *p_rate = parent_rate = __clk_round_rate(p, *rate);
- div = DIV_ROUND_UP((2 * parent_rate), rate) - 1;
+ div = DIV_ROUND_UP((2 * parent_rate), *rate) - 1;
div = min_t(u32, div, mask);
- return calc_rate(parent_rate, 0, 0, 0, div);
+ *rate = calc_rate(parent_rate, 0, 0, 0, div);
+
+ return 0;
}
static int clk_byte_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -486,7 +491,7 @@ static const struct frac_entry frac_table_pixel[] = {
{ }
};
-static long clk_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
+static int clk_pixel_determine_rate(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *p_rate, struct clk_hw **p)
@@ -501,7 +506,7 @@ static long clk_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
*p = __clk_get_hw(parent);
for (; frac->num; frac++) {
- request = (rate * frac->den) / frac->num;
+ request = (*rate * frac->den) / frac->num;
src_rate = __clk_round_rate(parent, request);
if ((src_rate < (request - delta)) ||
@@ -509,7 +514,9 @@ static long clk_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
continue;
*p_rate = src_rate;
- return (src_rate * frac->num) / frac->den;
+ *rate = (src_rate * frac->num) / frac->den;
+
+ return 0;
}
return -EINVAL;
diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factors.c
index 5865300..1cef6a5 100644
--- a/drivers/clk/sunxi/clk-factors.c
+++ b/drivers/clk/sunxi/clk-factors.c
@@ -82,11 +82,11 @@ static int clk_factors_round_rate(struct clk_hw *hw, unsigned long *rate,
return 0;
}
-static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_p)
+static int clk_factors_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_p)
{
struct clk *clk = hw->clk, *parent, *best_parent = NULL;
int i, num_parents;
@@ -99,14 +99,14 @@ static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
if (!parent)
continue;
if (__clk_get_flags(clk) & CLK_SET_RATE_PARENT)
- parent_rate = __clk_round_rate(parent, rate);
+ parent_rate = __clk_round_rate(parent, *rate);
else
parent_rate = __clk_get_rate(parent);
- child_rate = rate;
+ child_rate = *rate;
clk_factors_round_rate(hw, &child_rate, &parent_rate);
- if (child_rate <= rate && child_rate > best_child_rate) {
+ if (child_rate <= *rate && child_rate > best_child_rate) {
best_parent = parent;
best = parent_rate;
best_child_rate = child_rate;
@@ -116,8 +116,9 @@ static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
if (best_parent)
*best_parent_p = __clk_get_hw(best_parent);
*best_parent_rate = best;
+ *rate = best_child_rate;
- return best_child_rate;
+ return 0;
}
static int clk_factors_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/clk/sunxi/clk-sun6i-ar100.c b/drivers/clk/sunxi/clk-sun6i-ar100.c
index 63cf149..f398190 100644
--- a/drivers/clk/sunxi/clk-sun6i-ar100.c
+++ b/drivers/clk/sunxi/clk-sun6i-ar100.c
@@ -44,11 +44,11 @@ static unsigned long ar100_recalc_rate(struct clk_hw *hw,
return (parent_rate >> shift) / (div + 1);
}
-static long ar100_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+static int ar100_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
int nparents = __clk_get_num_parents(hw->clk);
long best_rate = -EINVAL;
@@ -65,7 +65,7 @@ static long ar100_determine_rate(struct clk_hw *hw, unsigned long rate,
parent = clk_get_parent_by_index(hw->clk, i);
parent_rate = __clk_get_rate(parent);
- div = DIV_ROUND_UP(parent_rate, rate);
+ div = DIV_ROUND_UP(parent_rate, *rate);
/*
* The AR100 clk contains 2 divisors:
@@ -108,7 +108,11 @@ static long ar100_determine_rate(struct clk_hw *hw, unsigned long rate,
}
}
- return best_rate;
+ if (best_rate < 0)
+ return best_rate;
+
+ *rate = best_rate;
+ return 0;
}
static int ar100_set_parent(struct clk_hw *hw, u8 index)
diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
index 7e1e2bd..3f2420f 100644
--- a/drivers/clk/sunxi/clk-sunxi.c
+++ b/drivers/clk/sunxi/clk-sunxi.c
@@ -118,11 +118,11 @@ static long sun6i_ahb1_clk_round(unsigned long rate, u8 *divp, u8 *pre_divp,
return (parent_rate / calcm) >> calcp;
}
-static long sun6i_ahb1_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk)
+static int sun6i_ahb1_clk_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk)
{
struct clk *clk = hw->clk, *parent, *best_parent = NULL;
int i, num_parents;
@@ -135,14 +135,14 @@ static long sun6i_ahb1_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
if (!parent)
continue;
if (__clk_get_flags(clk) & CLK_SET_RATE_PARENT)
- parent_rate = __clk_round_rate(parent, rate);
+ parent_rate = __clk_round_rate(parent, *rate);
else
parent_rate = __clk_get_rate(parent);
- child_rate = sun6i_ahb1_clk_round(rate, NULL, NULL, i,
+ child_rate = sun6i_ahb1_clk_round(*rate, NULL, NULL, i,
parent_rate);
- if (child_rate <= rate && child_rate > best_child_rate) {
+ if (child_rate <= *rate && child_rate > best_child_rate) {
best_parent = parent;
best = parent_rate;
best_child_rate = child_rate;
@@ -152,8 +152,9 @@ static long sun6i_ahb1_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
if (best_parent)
*best_parent_clk = __clk_get_hw(best_parent);
*best_parent_rate = best;
+ *rate = best_child_rate;
- return best_child_rate;
+ return 0;
}
static int sun6i_ahb1_clk_set_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 1213b0b..51d67de 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -175,8 +175,8 @@ struct clk_ops {
unsigned long parent_rate);
int (*round_rate)(struct clk_hw *hw, unsigned long *rate,
unsigned long *parent_rate);
- long (*determine_rate)(struct clk_hw *hw,
- unsigned long rate,
+ int (*determine_rate)(struct clk_hw *hw,
+ unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
@@ -575,16 +575,16 @@ unsigned long __clk_get_flags(struct clk *clk);
bool __clk_is_prepared(struct clk *clk);
bool __clk_is_enabled(struct clk *clk);
struct clk *__clk_lookup(const char *name);
-long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_p);
-unsigned long __clk_determine_rate(struct clk_hw *core,
- unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate);
-long __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long rate,
+int __clk_mux_determine_rate(struct clk_hw *hw, unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_p);
+int __clk_determine_rate(struct clk_hw *core,
+ unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate);
+int __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long *rate,
unsigned long min_rate,
unsigned long max_rate,
unsigned long *best_parent_rate,
diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h
index 3b2406c..1df140f 100644
--- a/include/linux/clk/ti.h
+++ b/include/linux/clk/ti.h
@@ -269,23 +269,23 @@ int omap3_noncore_dpll_set_rate_and_parent(struct clk_hw *hw,
unsigned long rate,
unsigned long parent_rate,
u8 index);
-long omap3_noncore_dpll_determine_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk);
+int omap3_noncore_dpll_determine_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk);
unsigned long omap4_dpll_regm4xen_recalc(struct clk_hw *hw,
unsigned long parent_rate);
int omap4_dpll_regm4xen_round_rate(struct clk_hw *hw,
unsigned long *target_rate,
unsigned long *parent_rate);
-long omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long min_rate,
- unsigned long max_rate,
- unsigned long *best_parent_rate,
- struct clk_hw **best_parent_clk);
+int omap4_dpll_regm4xen_determine_rate(struct clk_hw *hw,
+ unsigned long *rate,
+ unsigned long min_rate,
+ unsigned long max_rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_clk);
u8 omap2_init_dpll_parent(struct clk_hw *hw);
unsigned long omap3_dpll_recalc(struct clk_hw *hw, unsigned long parent_rate);
int omap2_dpll_round_rate(struct clk_hw *hw, unsigned long *target_rate,
--
1.9.1
^ permalink raw reply related [flat|nested] 18+ messages in thread
* Re: [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
2015-04-17 7:29 ` Boris Brezillon
(?)
(?)
@ 2015-04-19 12:13 ` Heiko Stübner
-1 siblings, 0 replies; 18+ messages in thread
From: Heiko Stübner @ 2015-04-19 12:13 UTC (permalink / raw)
To: Boris Brezillon
Cc: Mike Turquette, Mikko Perttunen, Jonathan Corbet, Shawn Guo,
ascha Hauer, David Brown, Daniel Walker, Bryan Huntsman,
Tony Lindgren, Paul Walmsley, Liviu Dudau, Sudeep Holla,
Lorenzo Pieralisi, Ralf Baechle, Max Filippov,
Sylwester Nawrocki, Tomasz Figa, Barry Song, Viresh Kumar,
Emilio López, Maxime Ripard, Peter De Schrijver
Hi Boris,
Am Freitag, 17. April 2015, 09:29:28 schrieb Boris Brezillon:
> Clock rates are stored in an unsigned long field, but ->round_rate()
> (which returns a rounded rate from a requested one) returns a long
> value (errors are reported using negative error codes), which can lead
> to long overflow if the clock rate exceed 2Ghz.
>
> Change ->round_rate() prototype to return 0 or an error code, and pass the
> requested rate as a pointer so that it can be adjusted depending on
> hardware capabilities.
>
> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> ---
On a rk3288-veyron-pinky with the fix described below:
Tested-by: Heiko Stuebner <heiko@sntech.de>
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index fa5a00e..1462ddc 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -1640,8 +1643,10 @@ static struct clk_core *clk_calc_new_rates(struct
> clk_core *clk, &parent_hw);
> parent = parent_hw ? parent_hw->core : NULL;
> } else if (clk->ops->round_rate) {
> - new_rate = clk->ops->round_rate(clk->hw, rate,
> - &best_parent_rate);
> + if (clk->ops->round_rate(clk->hw, &new_rate,
> + &best_parent_rate))
> + return NULL;
> +
> if (new_rate < min_rate || new_rate > max_rate)
> return NULL;
> } else if (!parent || !(clk->flags & CLK_SET_RATE_PARENT)) {
This is using new_rate uninitialized when calling into the round_rate
callback. Which in turn pushed my PLLs up to 2.2GHz :-)
I guess you'll need something like the following:
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index db4e4b2..afc7733 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1605,6 +1605,7 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *clk,
&parent_hw);
parent = parent_hw ? parent_hw->core : NULL;
} else if (clk->ops->round_rate) {
+ new_rate = rate;
if (clk->ops->round_rate(clk->hw, &new_rate,
&best_parent_rate))
return NULL;
> diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
> index f8d3baf..bd408ef 100644
> --- a/drivers/clk/rockchip/clk-pll.c
> +++ b/drivers/clk/rockchip/clk-pll.c
> @@ -63,8 +63,8 @@ static const struct rockchip_pll_rate_table
> *rockchip_get_pll_settings( return NULL;
> }
>
> -static long rockchip_pll_round_rate(struct clk_hw *hw,
> - unsigned long drate, unsigned long *prate)
> +static int rockchip_pll_round_rate(struct clk_hw *hw,
> + unsigned long *drate, unsigned long *prate)
> {
> struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
> const struct rockchip_pll_rate_table *rate_table = pll->rate_table;
> @@ -72,12 +72,15 @@ static long rockchip_pll_round_rate(struct clk_hw *hw,
>
> /* Assumming rate_table is in descending order */
> for (i = 0; i < pll->rate_count; i++) {
> - if (drate >= rate_table[i].rate)
> - return rate_table[i].rate;
> + if (*drate >= rate_table[i].rate) {
> + *drate = rate_table[i].rate;
> + return 0;
> + }
> }
>
> /* return minimum supported value */
> - return rate_table[i - 1].rate;
> + *drate = rate_table[i - 1].rate;
> + return 0;
> }
>
> /*
The rockchip-part:
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
And as I've stumbled onto this recently too, the clock-maintainership has
expanded to Stephen Boyd and linux-clk@vger.kernel.org .
Heiko
^ permalink raw reply related [flat|nested] 18+ messages in thread
* Re: [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
@ 2015-04-19 12:13 ` Heiko Stübner
0 siblings, 0 replies; 18+ messages in thread
From: Heiko Stübner @ 2015-04-19 12:13 UTC (permalink / raw)
To: Boris Brezillon
Cc: Mike Turquette, Mikko Perttunen, Jonathan Corbet, Shawn Guo,
ascha Hauer, David Brown, Daniel Walker, Bryan Huntsman,
Tony Lindgren, Paul Walmsley, Liviu Dudau, Sudeep Holla,
Lorenzo Pieralisi, Ralf Baechle, Max Filippov,
Sylwester Nawrocki, Tomasz Figa, Barry Song, Viresh Kumar,
Emilio López, Maxime Ripard, Peter De Schrijver,
Prashant Gaikwad, Stephen Warren, Thierry Reding,
Alexandre Courbot, Tero Kristo, Ulf Hansson, Michal Simek,
Philipp Zabel, linux-doc, linux-kernel, linux-arm-kernel,
linux-arm-msm, linux-omap, linux-mips, patches, linux-rockchip,
linux-samsung-soc, spear-devel, linux-tegra, dri-devel,
linux-media, rtc-linux
Hi Boris,
Am Freitag, 17. April 2015, 09:29:28 schrieb Boris Brezillon:
> Clock rates are stored in an unsigned long field, but ->round_rate()
> (which returns a rounded rate from a requested one) returns a long
> value (errors are reported using negative error codes), which can lead
> to long overflow if the clock rate exceed 2Ghz.
>
> Change ->round_rate() prototype to return 0 or an error code, and pass the
> requested rate as a pointer so that it can be adjusted depending on
> hardware capabilities.
>
> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> ---
On a rk3288-veyron-pinky with the fix described below:
Tested-by: Heiko Stuebner <heiko@sntech.de>
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index fa5a00e..1462ddc 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -1640,8 +1643,10 @@ static struct clk_core *clk_calc_new_rates(struct
> clk_core *clk, &parent_hw);
> parent = parent_hw ? parent_hw->core : NULL;
> } else if (clk->ops->round_rate) {
> - new_rate = clk->ops->round_rate(clk->hw, rate,
> - &best_parent_rate);
> + if (clk->ops->round_rate(clk->hw, &new_rate,
> + &best_parent_rate))
> + return NULL;
> +
> if (new_rate < min_rate || new_rate > max_rate)
> return NULL;
> } else if (!parent || !(clk->flags & CLK_SET_RATE_PARENT)) {
This is using new_rate uninitialized when calling into the round_rate
callback. Which in turn pushed my PLLs up to 2.2GHz :-)
I guess you'll need something like the following:
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index db4e4b2..afc7733 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1605,6 +1605,7 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *clk,
&parent_hw);
parent = parent_hw ? parent_hw->core : NULL;
} else if (clk->ops->round_rate) {
+ new_rate = rate;
if (clk->ops->round_rate(clk->hw, &new_rate,
&best_parent_rate))
return NULL;
> diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
> index f8d3baf..bd408ef 100644
> --- a/drivers/clk/rockchip/clk-pll.c
> +++ b/drivers/clk/rockchip/clk-pll.c
> @@ -63,8 +63,8 @@ static const struct rockchip_pll_rate_table
> *rockchip_get_pll_settings( return NULL;
> }
>
> -static long rockchip_pll_round_rate(struct clk_hw *hw,
> - unsigned long drate, unsigned long *prate)
> +static int rockchip_pll_round_rate(struct clk_hw *hw,
> + unsigned long *drate, unsigned long *prate)
> {
> struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
> const struct rockchip_pll_rate_table *rate_table = pll->rate_table;
> @@ -72,12 +72,15 @@ static long rockchip_pll_round_rate(struct clk_hw *hw,
>
> /* Assumming rate_table is in descending order */
> for (i = 0; i < pll->rate_count; i++) {
> - if (drate >= rate_table[i].rate)
> - return rate_table[i].rate;
> + if (*drate >= rate_table[i].rate) {
> + *drate = rate_table[i].rate;
> + return 0;
> + }
> }
>
> /* return minimum supported value */
> - return rate_table[i - 1].rate;
> + *drate = rate_table[i - 1].rate;
> + return 0;
> }
>
> /*
The rockchip-part:
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
And as I've stumbled onto this recently too, the clock-maintainership has
expanded to Stephen Boyd and linux-clk@vger.kernel.org .
Heiko
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [rtc-linux] Re: [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
@ 2015-04-19 12:13 ` Heiko Stübner
0 siblings, 0 replies; 18+ messages in thread
From: Heiko Stübner @ 2015-04-19 12:13 UTC (permalink / raw)
To: Boris Brezillon
Cc: Mike Turquette, Mikko Perttunen, Jonathan Corbet, Shawn Guo,
ascha Hauer, David Brown, Daniel Walker, Bryan Huntsman,
Tony Lindgren, Paul Walmsley, Liviu Dudau, Sudeep Holla,
Lorenzo Pieralisi, Ralf Baechle, Max Filippov,
Sylwester Nawrocki, Tomasz Figa, Barry Song, Viresh Kumar,
Emilio López, Maxime Ripard, Peter De Schrijver,
Prashant Gaikwad, Stephen Warren, Thierry Reding,
Alexandre Courbot, Tero Kristo, Ulf Hansson, Michal Simek,
Philipp Zabel, linux-doc, linux-kernel, linux-arm-kernel,
linux-arm-msm, linux-omap, linux-mips, patches, linux-rockchip,
linux-samsung-soc, spear-devel, linux-tegra, dri-devel,
linux-media, rtc-linux
Hi Boris,
Am Freitag, 17. April 2015, 09:29:28 schrieb Boris Brezillon:
> Clock rates are stored in an unsigned long field, but ->round_rate()
> (which returns a rounded rate from a requested one) returns a long
> value (errors are reported using negative error codes), which can lead
> to long overflow if the clock rate exceed 2Ghz.
>
> Change ->round_rate() prototype to return 0 or an error code, and pass the
> requested rate as a pointer so that it can be adjusted depending on
> hardware capabilities.
>
> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> ---
On a rk3288-veyron-pinky with the fix described below:
Tested-by: Heiko Stuebner <heiko@sntech.de>
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index fa5a00e..1462ddc 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -1640,8 +1643,10 @@ static struct clk_core *clk_calc_new_rates(struct
> clk_core *clk, &parent_hw);
> parent = parent_hw ? parent_hw->core : NULL;
> } else if (clk->ops->round_rate) {
> - new_rate = clk->ops->round_rate(clk->hw, rate,
> - &best_parent_rate);
> + if (clk->ops->round_rate(clk->hw, &new_rate,
> + &best_parent_rate))
> + return NULL;
> +
> if (new_rate < min_rate || new_rate > max_rate)
> return NULL;
> } else if (!parent || !(clk->flags & CLK_SET_RATE_PARENT)) {
This is using new_rate uninitialized when calling into the round_rate
callback. Which in turn pushed my PLLs up to 2.2GHz :-)
I guess you'll need something like the following:
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index db4e4b2..afc7733 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1605,6 +1605,7 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *clk,
&parent_hw);
parent = parent_hw ? parent_hw->core : NULL;
} else if (clk->ops->round_rate) {
+ new_rate = rate;
if (clk->ops->round_rate(clk->hw, &new_rate,
&best_parent_rate))
return NULL;
> diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
> index f8d3baf..bd408ef 100644
> --- a/drivers/clk/rockchip/clk-pll.c
> +++ b/drivers/clk/rockchip/clk-pll.c
> @@ -63,8 +63,8 @@ static const struct rockchip_pll_rate_table
> *rockchip_get_pll_settings( return NULL;
> }
>
> -static long rockchip_pll_round_rate(struct clk_hw *hw,
> - unsigned long drate, unsigned long *prate)
> +static int rockchip_pll_round_rate(struct clk_hw *hw,
> + unsigned long *drate, unsigned long *prate)
> {
> struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
> const struct rockchip_pll_rate_table *rate_table = pll->rate_table;
> @@ -72,12 +72,15 @@ static long rockchip_pll_round_rate(struct clk_hw *hw,
>
> /* Assumming rate_table is in descending order */
> for (i = 0; i < pll->rate_count; i++) {
> - if (drate >= rate_table[i].rate)
> - return rate_table[i].rate;
> + if (*drate >= rate_table[i].rate) {
> + *drate = rate_table[i].rate;
> + return 0;
> + }
> }
>
> /* return minimum supported value */
> - return rate_table[i - 1].rate;
> + *drate = rate_table[i - 1].rate;
> + return 0;
> }
>
> /*
The rockchip-part:
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
And as I've stumbled onto this recently too, the clock-maintainership has
expanded to Stephen Boyd and linux-clk@vger.kernel.org .
Heiko
--
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^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
@ 2015-04-19 12:13 ` Heiko Stübner
0 siblings, 0 replies; 18+ messages in thread
From: Heiko Stübner @ 2015-04-19 12:13 UTC (permalink / raw)
To: linux-arm-kernel
Hi Boris,
Am Freitag, 17. April 2015, 09:29:28 schrieb Boris Brezillon:
> Clock rates are stored in an unsigned long field, but ->round_rate()
> (which returns a rounded rate from a requested one) returns a long
> value (errors are reported using negative error codes), which can lead
> to long overflow if the clock rate exceed 2Ghz.
>
> Change ->round_rate() prototype to return 0 or an error code, and pass the
> requested rate as a pointer so that it can be adjusted depending on
> hardware capabilities.
>
> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> ---
On a rk3288-veyron-pinky with the fix described below:
Tested-by: Heiko Stuebner <heiko@sntech.de>
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index fa5a00e..1462ddc 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -1640,8 +1643,10 @@ static struct clk_core *clk_calc_new_rates(struct
> clk_core *clk, &parent_hw);
> parent = parent_hw ? parent_hw->core : NULL;
> } else if (clk->ops->round_rate) {
> - new_rate = clk->ops->round_rate(clk->hw, rate,
> - &best_parent_rate);
> + if (clk->ops->round_rate(clk->hw, &new_rate,
> + &best_parent_rate))
> + return NULL;
> +
> if (new_rate < min_rate || new_rate > max_rate)
> return NULL;
> } else if (!parent || !(clk->flags & CLK_SET_RATE_PARENT)) {
This is using new_rate uninitialized when calling into the round_rate
callback. Which in turn pushed my PLLs up to 2.2GHz :-)
I guess you'll need something like the following:
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index db4e4b2..afc7733 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1605,6 +1605,7 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *clk,
&parent_hw);
parent = parent_hw ? parent_hw->core : NULL;
} else if (clk->ops->round_rate) {
+ new_rate = rate;
if (clk->ops->round_rate(clk->hw, &new_rate,
&best_parent_rate))
return NULL;
> diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
> index f8d3baf..bd408ef 100644
> --- a/drivers/clk/rockchip/clk-pll.c
> +++ b/drivers/clk/rockchip/clk-pll.c
> @@ -63,8 +63,8 @@ static const struct rockchip_pll_rate_table
> *rockchip_get_pll_settings( return NULL;
> }
>
> -static long rockchip_pll_round_rate(struct clk_hw *hw,
> - unsigned long drate, unsigned long *prate)
> +static int rockchip_pll_round_rate(struct clk_hw *hw,
> + unsigned long *drate, unsigned long *prate)
> {
> struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
> const struct rockchip_pll_rate_table *rate_table = pll->rate_table;
> @@ -72,12 +72,15 @@ static long rockchip_pll_round_rate(struct clk_hw *hw,
>
> /* Assumming rate_table is in descending order */
> for (i = 0; i < pll->rate_count; i++) {
> - if (drate >= rate_table[i].rate)
> - return rate_table[i].rate;
> + if (*drate >= rate_table[i].rate) {
> + *drate = rate_table[i].rate;
> + return 0;
> + }
> }
>
> /* return minimum supported value */
> - return rate_table[i - 1].rate;
> + *drate = rate_table[i - 1].rate;
> + return 0;
> }
>
> /*
The rockchip-part:
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
And as I've stumbled onto this recently too, the clock-maintainership has
expanded to Stephen Boyd and linux-clk at vger.kernel.org .
Heiko
^ permalink raw reply related [flat|nested] 18+ messages in thread
* Re: [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
2015-04-19 12:13 ` Heiko Stübner
(?)
(?)
@ 2015-04-19 15:30 ` Boris Brezillon
-1 siblings, 0 replies; 18+ messages in thread
From: Boris Brezillon @ 2015-04-19 15:30 UTC (permalink / raw)
To: Heiko Stübner
Cc: Mike Turquette, Mikko Perttunen, Jonathan Corbet, Shawn Guo,
ascha Hauer, David Brown, Daniel Walker, Bryan Huntsman,
Tony Lindgren, Paul Walmsley, Liviu Dudau, Sudeep Holla,
Lorenzo Pieralisi, Ralf Baechle, Max Filippov,
Sylwester Nawrocki, Tomasz Figa, Barry Song, Viresh Kumar,
Emilio López, Maxime Ripard, Peter De Schrijver
Hi Heiko,
On Sun, 19 Apr 2015 14:13:04 +0200
Heiko Stübner <heiko@sntech.de> wrote:
> Hi Boris,
>
> Am Freitag, 17. April 2015, 09:29:28 schrieb Boris Brezillon:
> > Clock rates are stored in an unsigned long field, but ->round_rate()
> > (which returns a rounded rate from a requested one) returns a long
> > value (errors are reported using negative error codes), which can lead
> > to long overflow if the clock rate exceed 2Ghz.
> >
> > Change ->round_rate() prototype to return 0 or an error code, and pass the
> > requested rate as a pointer so that it can be adjusted depending on
> > hardware capabilities.
> >
> > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> > ---
>
> On a rk3288-veyron-pinky with the fix described below:
> Tested-by: Heiko Stuebner <heiko@sntech.de>
>
>
> > diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> > index fa5a00e..1462ddc 100644
> > --- a/drivers/clk/clk.c
> > +++ b/drivers/clk/clk.c
> > @@ -1640,8 +1643,10 @@ static struct clk_core *clk_calc_new_rates(struct
> > clk_core *clk, &parent_hw);
> > parent = parent_hw ? parent_hw->core : NULL;
> > } else if (clk->ops->round_rate) {
> > - new_rate = clk->ops->round_rate(clk->hw, rate,
> > - &best_parent_rate);
> > + if (clk->ops->round_rate(clk->hw, &new_rate,
> > + &best_parent_rate))
> > + return NULL;
> > +
> > if (new_rate < min_rate || new_rate > max_rate)
> > return NULL;
> > } else if (!parent || !(clk->flags & CLK_SET_RATE_PARENT)) {
>
> This is using new_rate uninitialized when calling into the round_rate
> callback. Which in turn pushed my PLLs up to 2.2GHz :-)
Indeed, thanks for the fix.
[...]
>
>
> And as I've stumbled onto this recently too, the clock-maintainership has
> expanded to Stephen Boyd and linux-clk@vger.kernel.org .
Noted. I'll add Stephen and the new linux-clk ML in the recipient list
next time.
Best Regards,
Boris
--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
@ 2015-04-19 15:30 ` Boris Brezillon
0 siblings, 0 replies; 18+ messages in thread
From: Boris Brezillon @ 2015-04-19 15:30 UTC (permalink / raw)
To: Heiko Stübner
Cc: Mike Turquette, Mikko Perttunen, Jonathan Corbet, Shawn Guo,
ascha Hauer, David Brown, Daniel Walker, Bryan Huntsman,
Tony Lindgren, Paul Walmsley, Liviu Dudau, Sudeep Holla,
Lorenzo Pieralisi, Ralf Baechle, Max Filippov,
Sylwester Nawrocki, Tomasz Figa, Barry Song, Viresh Kumar,
Emilio López, Maxime Ripard, Peter De Schrijver,
Prashant Gaikwad, Stephen Warren, Thierry Reding,
Alexandre Courbot, Tero Kristo, Ulf Hansson, Michal Simek,
Philipp Zabel, linux-doc, linux-kernel, linux-arm-kernel,
linux-arm-msm, linux-omap, linux-mips, patches, linux-rockchip,
linux-samsung-soc, spear-devel, linux-tegra, dri-devel,
linux-media, rtc-linux
Hi Heiko,
On Sun, 19 Apr 2015 14:13:04 +0200
Heiko Stübner <heiko@sntech.de> wrote:
> Hi Boris,
>
> Am Freitag, 17. April 2015, 09:29:28 schrieb Boris Brezillon:
> > Clock rates are stored in an unsigned long field, but ->round_rate()
> > (which returns a rounded rate from a requested one) returns a long
> > value (errors are reported using negative error codes), which can lead
> > to long overflow if the clock rate exceed 2Ghz.
> >
> > Change ->round_rate() prototype to return 0 or an error code, and pass the
> > requested rate as a pointer so that it can be adjusted depending on
> > hardware capabilities.
> >
> > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> > ---
>
> On a rk3288-veyron-pinky with the fix described below:
> Tested-by: Heiko Stuebner <heiko@sntech.de>
>
>
> > diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> > index fa5a00e..1462ddc 100644
> > --- a/drivers/clk/clk.c
> > +++ b/drivers/clk/clk.c
> > @@ -1640,8 +1643,10 @@ static struct clk_core *clk_calc_new_rates(struct
> > clk_core *clk, &parent_hw);
> > parent = parent_hw ? parent_hw->core : NULL;
> > } else if (clk->ops->round_rate) {
> > - new_rate = clk->ops->round_rate(clk->hw, rate,
> > - &best_parent_rate);
> > + if (clk->ops->round_rate(clk->hw, &new_rate,
> > + &best_parent_rate))
> > + return NULL;
> > +
> > if (new_rate < min_rate || new_rate > max_rate)
> > return NULL;
> > } else if (!parent || !(clk->flags & CLK_SET_RATE_PARENT)) {
>
> This is using new_rate uninitialized when calling into the round_rate
> callback. Which in turn pushed my PLLs up to 2.2GHz :-)
Indeed, thanks for the fix.
[...]
>
>
> And as I've stumbled onto this recently too, the clock-maintainership has
> expanded to Stephen Boyd and linux-clk@vger.kernel.org .
Noted. I'll add Stephen and the new linux-clk ML in the recipient list
next time.
Best Regards,
Boris
--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
^ permalink raw reply [flat|nested] 18+ messages in thread
* [rtc-linux] Re: [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
@ 2015-04-19 15:30 ` Boris Brezillon
0 siblings, 0 replies; 18+ messages in thread
From: Boris Brezillon @ 2015-04-19 15:30 UTC (permalink / raw)
To: Heiko Stübner
Cc: Mike Turquette, Mikko Perttunen, Jonathan Corbet, Shawn Guo,
ascha Hauer, David Brown, Daniel Walker, Bryan Huntsman,
Tony Lindgren, Paul Walmsley, Liviu Dudau, Sudeep Holla,
Lorenzo Pieralisi, Ralf Baechle, Max Filippov,
Sylwester Nawrocki, Tomasz Figa, Barry Song, Viresh Kumar,
Emilio López, Maxime Ripard, Peter De Schrijver,
Prashant Gaikwad, Stephen Warren, Thierry Reding,
Alexandre Courbot, Tero Kristo, Ulf Hansson, Michal Simek,
Philipp Zabel, linux-doc, linux-kernel, linux-arm-kernel,
linux-arm-msm, linux-omap, linux-mips, patches, linux-rockchip,
linux-samsung-soc, spear-devel, linux-tegra, dri-devel,
linux-media, rtc-linux
Hi Heiko,
On Sun, 19 Apr 2015 14:13:04 +0200
Heiko St=C3=BCbner <heiko@sntech.de> wrote:
> Hi Boris,
>=20
> Am Freitag, 17. April 2015, 09:29:28 schrieb Boris Brezillon:
> > Clock rates are stored in an unsigned long field, but ->round_rate()
> > (which returns a rounded rate from a requested one) returns a long
> > value (errors are reported using negative error codes), which can lead
> > to long overflow if the clock rate exceed 2Ghz.
> >=20
> > Change ->round_rate() prototype to return 0 or an error code, and pass =
the
> > requested rate as a pointer so that it can be adjusted depending on
> > hardware capabilities.
> >=20
> > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> > ---
>=20
> On a rk3288-veyron-pinky with the fix described below:
> Tested-by: Heiko Stuebner <heiko@sntech.de>
>=20
>=20
> > diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> > index fa5a00e..1462ddc 100644
> > --- a/drivers/clk/clk.c
> > +++ b/drivers/clk/clk.c
> > @@ -1640,8 +1643,10 @@ static struct clk_core *clk_calc_new_rates(struc=
t
> > clk_core *clk, &parent_hw);
> > parent =3D parent_hw ? parent_hw->core : NULL;
> > } else if (clk->ops->round_rate) {
> > - new_rate =3D clk->ops->round_rate(clk->hw, rate,
> > - &best_parent_rate);
> > + if (clk->ops->round_rate(clk->hw, &new_rate,
> > + &best_parent_rate))
> > + return NULL;
> > +
> > if (new_rate < min_rate || new_rate > max_rate)
> > return NULL;
> > } else if (!parent || !(clk->flags & CLK_SET_RATE_PARENT)) {
>=20
> This is using new_rate uninitialized when calling into the round_rate
> callback. Which in turn pushed my PLLs up to 2.2GHz :-)
Indeed, thanks for the fix.
[...]
>=20
>=20
> And as I've stumbled onto this recently too, the clock-maintainership has
> expanded to Stephen Boyd and linux-clk@vger.kernel.org .
Noted. I'll add Stephen and the new linux-clk ML in the recipient list
next time.
Best Regards,
Boris
--=20
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
--=20
--=20
You received this message because you are subscribed to "rtc-linux".
Membership options at http://groups.google.com/group/rtc-linux .
Please read http://groups.google.com/group/rtc-linux/web/checklist
before submitting a driver.
---=20
You received this message because you are subscribed to the Google Groups "=
rtc-linux" group.
To unsubscribe from this group and stop receiving emails from it, send an e=
mail to rtc-linux+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
^ permalink raw reply [flat|nested] 18+ messages in thread
* [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
@ 2015-04-19 15:30 ` Boris Brezillon
0 siblings, 0 replies; 18+ messages in thread
From: Boris Brezillon @ 2015-04-19 15:30 UTC (permalink / raw)
To: linux-arm-kernel
Hi Heiko,
On Sun, 19 Apr 2015 14:13:04 +0200
Heiko St?bner <heiko@sntech.de> wrote:
> Hi Boris,
>
> Am Freitag, 17. April 2015, 09:29:28 schrieb Boris Brezillon:
> > Clock rates are stored in an unsigned long field, but ->round_rate()
> > (which returns a rounded rate from a requested one) returns a long
> > value (errors are reported using negative error codes), which can lead
> > to long overflow if the clock rate exceed 2Ghz.
> >
> > Change ->round_rate() prototype to return 0 or an error code, and pass the
> > requested rate as a pointer so that it can be adjusted depending on
> > hardware capabilities.
> >
> > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> > ---
>
> On a rk3288-veyron-pinky with the fix described below:
> Tested-by: Heiko Stuebner <heiko@sntech.de>
>
>
> > diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> > index fa5a00e..1462ddc 100644
> > --- a/drivers/clk/clk.c
> > +++ b/drivers/clk/clk.c
> > @@ -1640,8 +1643,10 @@ static struct clk_core *clk_calc_new_rates(struct
> > clk_core *clk, &parent_hw);
> > parent = parent_hw ? parent_hw->core : NULL;
> > } else if (clk->ops->round_rate) {
> > - new_rate = clk->ops->round_rate(clk->hw, rate,
> > - &best_parent_rate);
> > + if (clk->ops->round_rate(clk->hw, &new_rate,
> > + &best_parent_rate))
> > + return NULL;
> > +
> > if (new_rate < min_rate || new_rate > max_rate)
> > return NULL;
> > } else if (!parent || !(clk->flags & CLK_SET_RATE_PARENT)) {
>
> This is using new_rate uninitialized when calling into the round_rate
> callback. Which in turn pushed my PLLs up to 2.2GHz :-)
Indeed, thanks for the fix.
[...]
>
>
> And as I've stumbled onto this recently too, the clock-maintainership has
> expanded to Stephen Boyd and linux-clk at vger.kernel.org .
Noted. I'll add Stephen and the new linux-clk ML in the recipient list
next time.
Best Regards,
Boris
--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
2015-04-17 7:29 ` Boris Brezillon
(?)
(?)
@ 2015-04-28 15:11 ` Mikko Perttunen
-1 siblings, 0 replies; 18+ messages in thread
From: Mikko Perttunen @ 2015-04-28 15:11 UTC (permalink / raw)
To: Boris Brezillon, Mike Turquette
Cc: Jonathan Corbet, Shawn Guo, ascha Hauer, David Brown,
Daniel Walker, Bryan Huntsman, Tony Lindgren, Paul Walmsley,
Liviu Dudau, Sudeep Holla, Lorenzo Pieralisi, Ralf Baechle,
Max Filippov, Heiko Stuebner, Sylwester Nawrocki, Tomasz Figa,
Barry Song, Viresh Kumar, Emilio López, Maxime Ripard,
Peter De Schrijver, Prashant Gaikwad
The series
Tested-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
on Jetson-TK1.
I rebased my cpufreq series on top of this and everything's working well
now. :)
Thanks,
Mikko.
On 04/17/2015 10:29 AM, Boris Brezillon wrote:
> ...
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
@ 2015-04-28 15:11 ` Mikko Perttunen
0 siblings, 0 replies; 18+ messages in thread
From: Mikko Perttunen @ 2015-04-28 15:11 UTC (permalink / raw)
To: Boris Brezillon, Mike Turquette
Cc: Jonathan Corbet, Shawn Guo, ascha Hauer, David Brown,
Daniel Walker, Bryan Huntsman, Tony Lindgren, Paul Walmsley,
Liviu Dudau, Sudeep Holla, Lorenzo Pieralisi, Ralf Baechle,
Max Filippov, Heiko Stuebner, Sylwester Nawrocki, Tomasz Figa,
Barry Song, Viresh Kumar, Emilio López, Maxime Ripard,
Peter De Schrijver, Prashant Gaikwad, Stephen Warren,
Thierry Reding, Alexandre Courbot, Tero Kristo, Ulf Hansson,
Michal Simek, Philipp Zabel, linux-doc, linux-kernel,
linux-arm-kernel, linux-arm-msm, linux-omap, linux-mips, patches,
linux-rockchip, linux-samsung-soc, spear-devel, linux-tegra,
dri-devel, linux-media, rtc-linux
The series
Tested-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
on Jetson-TK1.
I rebased my cpufreq series on top of this and everything's working well
now. :)
Thanks,
Mikko.
On 04/17/2015 10:29 AM, Boris Brezillon wrote:
> ...
^ permalink raw reply [flat|nested] 18+ messages in thread
* [rtc-linux] Re: [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
@ 2015-04-28 15:11 ` Mikko Perttunen
0 siblings, 0 replies; 18+ messages in thread
From: Mikko Perttunen @ 2015-04-28 15:11 UTC (permalink / raw)
To: Boris Brezillon, Mike Turquette
Cc: Jonathan Corbet, Shawn Guo, ascha Hauer, David Brown,
Daniel Walker, Bryan Huntsman, Tony Lindgren, Paul Walmsley,
Liviu Dudau, Sudeep Holla, Lorenzo Pieralisi, Ralf Baechle,
Max Filippov, Heiko Stuebner, Sylwester Nawrocki, Tomasz Figa,
Barry Song, Viresh Kumar, Emilio López, Maxime Ripard,
Peter De Schrijver, Prashant Gaikwad, Stephen Warren,
Thierry Reding, Alexandre Courbot, Tero Kristo, Ulf Hansson,
Michal Simek, Philipp Zabel, linux-doc, linux-kernel,
linux-arm-kernel, linux-arm-msm, linux-omap, linux-mips, patches,
linux-rockchip, linux-samsung-soc, spear-devel, linux-tegra,
dri-devel, linux-media, rtc-linux
The series
Tested-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
on Jetson-TK1.
I rebased my cpufreq series on top of this and everything's working well
now. :)
Thanks,
Mikko.
On 04/17/2015 10:29 AM, Boris Brezillon wrote:
> ...
--
--
You received this message because you are subscribed to "rtc-linux".
Membership options at http://groups.google.com/group/rtc-linux .
Please read http://groups.google.com/group/rtc-linux/web/checklist
before submitting a driver.
---
You received this message because you are subscribed to the Google Groups "rtc-linux" group.
To unsubscribe from this group and stop receiving emails from it, send an email to rtc-linux+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
^ permalink raw reply [flat|nested] 18+ messages in thread
* [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype
@ 2015-04-28 15:11 ` Mikko Perttunen
0 siblings, 0 replies; 18+ messages in thread
From: Mikko Perttunen @ 2015-04-28 15:11 UTC (permalink / raw)
To: linux-arm-kernel
The series
Tested-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
on Jetson-TK1.
I rebased my cpufreq series on top of this and everything's working well
now. :)
Thanks,
Mikko.
On 04/17/2015 10:29 AM, Boris Brezillon wrote:
> ...
^ permalink raw reply [flat|nested] 18+ messages in thread
end of thread, other threads:[~2015-04-28 15:11 UTC | newest]
Thread overview: 18+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
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2015-04-17 7:29 ` [PATCH 1/2] clk: change clk_ops' ->round_rate() prototype Boris Brezillon
2015-04-17 7:29 ` Boris Brezillon
2015-04-17 7:29 ` [rtc-linux] " Boris Brezillon
2015-04-17 7:29 ` Boris Brezillon
2015-04-19 12:13 ` Heiko Stübner
2015-04-19 12:13 ` Heiko Stübner
2015-04-19 12:13 ` [rtc-linux] " Heiko Stübner
2015-04-19 12:13 ` Heiko Stübner
2015-04-19 15:30 ` Boris Brezillon
2015-04-19 15:30 ` Boris Brezillon
2015-04-19 15:30 ` [rtc-linux] " Boris Brezillon
2015-04-19 15:30 ` Boris Brezillon
2015-04-28 15:11 ` Mikko Perttunen
2015-04-28 15:11 ` Mikko Perttunen
2015-04-28 15:11 ` [rtc-linux] " Mikko Perttunen
2015-04-28 15:11 ` Mikko Perttunen
2015-04-17 7:29 ` [PATCH 2/2] clk: change clk_ops' ->determine_rate() prototype Boris Brezillon
2015-04-17 7:29 ` Boris Brezillon
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