From: Geert Uytterhoeven <geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org>
To: Michael Turquette
<mturquette-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>,
Stephen Boyd <sboyd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Cc: Simon Horman
<horms+renesas-/R6kz+dDXgpPR4JQBCEnsQ@public.gmane.org>,
Magnus Damm
<damm+renesas-yzvPICuk2ACczHhG9Qg4qA@public.gmane.org>,
Laurent Pinchart
<laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>,
linux-clk-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-renesas-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Geert Uytterhoeven
<geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org>
Subject: [PATCH 3/4] clk: renesas: cpg-mssr: Extract common R-Car Gen3 support code
Date: Wed, 4 May 2016 16:35:42 +0200 [thread overview]
Message-ID: <1462372543-31835-4-git-send-email-geert+renesas@glider.be> (raw)
In-Reply-To: <1462372543-31835-1-git-send-email-geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org>
Extract the code to support parts common to all members of the R-Car
Gen3 SoC family into a separate file, to ease sharing among SoC-specific
drivers.
Note that while the cpg_pll_configs[] arrays and the selection of the
config based on the MODE bits are identical on R-Car H3 and R-Car M3-W,
they are not common, and may be different on other R-Car Gen3 SoCs.
Signed-off-by: Geert Uytterhoeven <geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org>
---
drivers/clk/renesas/Makefile | 2 +-
drivers/clk/renesas/r8a7795-cpg-mssr.c | 360 +--------------------------------
drivers/clk/renesas/rcar-gen3-cpg.c | 359 ++++++++++++++++++++++++++++++++
drivers/clk/renesas/rcar-gen3-cpg.h | 43 ++++
4 files changed, 408 insertions(+), 356 deletions(-)
create mode 100644 drivers/clk/renesas/rcar-gen3-cpg.c
create mode 100644 drivers/clk/renesas/rcar-gen3-cpg.h
diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile
index ead8bb8435249493..88924c95808c3b2e 100644
--- a/drivers/clk/renesas/Makefile
+++ b/drivers/clk/renesas/Makefile
@@ -8,7 +8,7 @@ obj-$(CONFIG_ARCH_R8A7790) += clk-rcar-gen2.o clk-div6.o
obj-$(CONFIG_ARCH_R8A7791) += clk-rcar-gen2.o clk-div6.o
obj-$(CONFIG_ARCH_R8A7793) += clk-rcar-gen2.o clk-div6.o
obj-$(CONFIG_ARCH_R8A7794) += clk-rcar-gen2.o clk-div6.o
-obj-$(CONFIG_ARCH_R8A7795) += r8a7795-cpg-mssr.o
+obj-$(CONFIG_ARCH_R8A7795) += r8a7795-cpg-mssr.o rcar-gen3-cpg.o
obj-$(CONFIG_ARCH_SH73A0) += clk-sh73a0.o clk-div6.o
obj-$(CONFIG_CLK_RENESAS_CPG_MSSR) += renesas-cpg-mssr.o clk-div6.o
diff --git a/drivers/clk/renesas/r8a7795-cpg-mssr.c b/drivers/clk/renesas/r8a7795-cpg-mssr.c
index ca5519c583d4bf57..e53aff5b23ad4967 100644
--- a/drivers/clk/renesas/r8a7795-cpg-mssr.c
+++ b/drivers/clk/renesas/r8a7795-cpg-mssr.c
@@ -12,22 +12,14 @@
* the Free Software Foundation; version 2 of the License.
*/
-#include <linux/bug.h>
-#include <linux/clk.h>
-#include <linux/clk-provider.h>
#include <linux/device.h>
-#include <linux/err.h>
#include <linux/init.h>
-#include <linux/io.h>
#include <linux/kernel.h>
-#include <linux/of.h>
-#include <linux/slab.h>
#include <dt-bindings/clock/r8a7795-cpg-mssr.h>
#include "renesas-cpg-mssr.h"
-
-#define CPG_RCKCR 0x240
+#include "rcar-gen3-cpg.h"
enum clk_ids {
/* Core Clock Outputs exported to DT */
@@ -58,20 +50,6 @@ enum clk_ids {
MOD_CLK_BASE
};
-enum r8a7795_clk_types {
- CLK_TYPE_GEN3_MAIN = CLK_TYPE_CUSTOM,
- CLK_TYPE_GEN3_PLL0,
- CLK_TYPE_GEN3_PLL1,
- CLK_TYPE_GEN3_PLL2,
- CLK_TYPE_GEN3_PLL3,
- CLK_TYPE_GEN3_PLL4,
- CLK_TYPE_GEN3_SD,
- CLK_TYPE_GEN3_R,
-};
-
-#define DEF_GEN3_SD(_name, _id, _parent, _offset) \
- DEF_BASE(_name, _id, CLK_TYPE_GEN3_SD, _parent, .offset = _offset)
-
static const struct cpg_core_clk r8a7795_core_clks[] __initconst = {
/* External Clock Inputs */
DEF_INPUT("extal", CLK_EXTAL),
@@ -262,225 +240,6 @@ static const unsigned int r8a7795_crit_mod_clks[] __initconst = {
MOD_CLK_ID(408), /* INTC-AP (GIC) */
};
-/* -----------------------------------------------------------------------------
- * SDn Clock
- *
- */
-#define CPG_SD_STP_HCK BIT(9)
-#define CPG_SD_STP_CK BIT(8)
-
-#define CPG_SD_STP_MASK (CPG_SD_STP_HCK | CPG_SD_STP_CK)
-#define CPG_SD_FC_MASK (0x7 << 2 | 0x3 << 0)
-
-#define CPG_SD_DIV_TABLE_DATA(stp_hck, stp_ck, sd_srcfc, sd_fc, sd_div) \
-{ \
- .val = ((stp_hck) ? CPG_SD_STP_HCK : 0) | \
- ((stp_ck) ? CPG_SD_STP_CK : 0) | \
- ((sd_srcfc) << 2) | \
- ((sd_fc) << 0), \
- .div = (sd_div), \
-}
-
-struct sd_div_table {
- u32 val;
- unsigned int div;
-};
-
-struct sd_clock {
- struct clk_hw hw;
- void __iomem *reg;
- const struct sd_div_table *div_table;
- unsigned int div_num;
- unsigned int div_min;
- unsigned int div_max;
-};
-
-/* SDn divider
- * sd_srcfc sd_fc div
- * stp_hck stp_ck (div) (div) = sd_srcfc x sd_fc
- *-------------------------------------------------------------------
- * 0 0 0 (1) 1 (4) 4
- * 0 0 1 (2) 1 (4) 8
- * 1 0 2 (4) 1 (4) 16
- * 1 0 3 (8) 1 (4) 32
- * 1 0 4 (16) 1 (4) 64
- * 0 0 0 (1) 0 (2) 2
- * 0 0 1 (2) 0 (2) 4
- * 1 0 2 (4) 0 (2) 8
- * 1 0 3 (8) 0 (2) 16
- * 1 0 4 (16) 0 (2) 32
- */
-static const struct sd_div_table cpg_sd_div_table[] = {
-/* CPG_SD_DIV_TABLE_DATA(stp_hck, stp_ck, sd_srcfc, sd_fc, sd_div) */
- CPG_SD_DIV_TABLE_DATA(0, 0, 0, 1, 4),
- CPG_SD_DIV_TABLE_DATA(0, 0, 1, 1, 8),
- CPG_SD_DIV_TABLE_DATA(1, 0, 2, 1, 16),
- CPG_SD_DIV_TABLE_DATA(1, 0, 3, 1, 32),
- CPG_SD_DIV_TABLE_DATA(1, 0, 4, 1, 64),
- CPG_SD_DIV_TABLE_DATA(0, 0, 0, 0, 2),
- CPG_SD_DIV_TABLE_DATA(0, 0, 1, 0, 4),
- CPG_SD_DIV_TABLE_DATA(1, 0, 2, 0, 8),
- CPG_SD_DIV_TABLE_DATA(1, 0, 3, 0, 16),
- CPG_SD_DIV_TABLE_DATA(1, 0, 4, 0, 32),
-};
-
-#define to_sd_clock(_hw) container_of(_hw, struct sd_clock, hw)
-
-static int cpg_sd_clock_enable(struct clk_hw *hw)
-{
- struct sd_clock *clock = to_sd_clock(hw);
- u32 val, sd_fc;
- unsigned int i;
-
- val = clk_readl(clock->reg);
-
- sd_fc = val & CPG_SD_FC_MASK;
- for (i = 0; i < clock->div_num; i++)
- if (sd_fc == (clock->div_table[i].val & CPG_SD_FC_MASK))
- break;
-
- if (i >= clock->div_num)
- return -EINVAL;
-
- val &= ~(CPG_SD_STP_MASK);
- val |= clock->div_table[i].val & CPG_SD_STP_MASK;
-
- clk_writel(val, clock->reg);
-
- return 0;
-}
-
-static void cpg_sd_clock_disable(struct clk_hw *hw)
-{
- struct sd_clock *clock = to_sd_clock(hw);
-
- clk_writel(clk_readl(clock->reg) | CPG_SD_STP_MASK, clock->reg);
-}
-
-static int cpg_sd_clock_is_enabled(struct clk_hw *hw)
-{
- struct sd_clock *clock = to_sd_clock(hw);
-
- return !(clk_readl(clock->reg) & CPG_SD_STP_MASK);
-}
-
-static unsigned long cpg_sd_clock_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct sd_clock *clock = to_sd_clock(hw);
- unsigned long rate = parent_rate;
- u32 val, sd_fc;
- unsigned int i;
-
- val = clk_readl(clock->reg);
-
- sd_fc = val & CPG_SD_FC_MASK;
- for (i = 0; i < clock->div_num; i++)
- if (sd_fc == (clock->div_table[i].val & CPG_SD_FC_MASK))
- break;
-
- if (i >= clock->div_num)
- return -EINVAL;
-
- return DIV_ROUND_CLOSEST(rate, clock->div_table[i].div);
-}
-
-static unsigned int cpg_sd_clock_calc_div(struct sd_clock *clock,
- unsigned long rate,
- unsigned long parent_rate)
-{
- unsigned int div;
-
- if (!rate)
- rate = 1;
-
- div = DIV_ROUND_CLOSEST(parent_rate, rate);
-
- return clamp_t(unsigned int, div, clock->div_min, clock->div_max);
-}
-
-static long cpg_sd_clock_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
-{
- struct sd_clock *clock = to_sd_clock(hw);
- unsigned int div = cpg_sd_clock_calc_div(clock, rate, *parent_rate);
-
- return DIV_ROUND_CLOSEST(*parent_rate, div);
-}
-
-static int cpg_sd_clock_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
-{
- struct sd_clock *clock = to_sd_clock(hw);
- unsigned int div = cpg_sd_clock_calc_div(clock, rate, parent_rate);
- u32 val;
- unsigned int i;
-
- for (i = 0; i < clock->div_num; i++)
- if (div == clock->div_table[i].div)
- break;
-
- if (i >= clock->div_num)
- return -EINVAL;
-
- val = clk_readl(clock->reg);
- val &= ~(CPG_SD_STP_MASK | CPG_SD_FC_MASK);
- val |= clock->div_table[i].val & (CPG_SD_STP_MASK | CPG_SD_FC_MASK);
- clk_writel(val, clock->reg);
-
- return 0;
-}
-
-static const struct clk_ops cpg_sd_clock_ops = {
- .enable = cpg_sd_clock_enable,
- .disable = cpg_sd_clock_disable,
- .is_enabled = cpg_sd_clock_is_enabled,
- .recalc_rate = cpg_sd_clock_recalc_rate,
- .round_rate = cpg_sd_clock_round_rate,
- .set_rate = cpg_sd_clock_set_rate,
-};
-
-static struct clk * __init cpg_sd_clk_register(const struct cpg_core_clk *core,
- void __iomem *base,
- const char *parent_name)
-{
- struct clk_init_data init;
- struct sd_clock *clock;
- struct clk *clk;
- unsigned int i;
-
- clock = kzalloc(sizeof(*clock), GFP_KERNEL);
- if (!clock)
- return ERR_PTR(-ENOMEM);
-
- init.name = core->name;
- init.ops = &cpg_sd_clock_ops;
- init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT;
- init.parent_names = &parent_name;
- init.num_parents = 1;
-
- clock->reg = base + core->offset;
- clock->hw.init = &init;
- clock->div_table = cpg_sd_div_table;
- clock->div_num = ARRAY_SIZE(cpg_sd_div_table);
-
- clock->div_max = clock->div_table[0].div;
- clock->div_min = clock->div_max;
- for (i = 1; i < clock->div_num; i++) {
- clock->div_max = max(clock->div_max, clock->div_table[i].div);
- clock->div_min = min(clock->div_min, clock->div_table[i].div);
- }
-
- clk = clk_register(NULL, &clock->hw);
- if (IS_ERR(clk))
- kfree(clock);
-
- return clk;
-}
-
-#define CPG_PLL0CR 0x00d8
-#define CPG_PLL2CR 0x002c
-#define CPG_PLL4CR 0x01f4
/*
* CPG Clock Data
@@ -512,13 +271,7 @@ static struct clk * __init cpg_sd_clk_register(const struct cpg_core_clk *core,
(((md) & BIT(19)) >> 18) | \
(((md) & BIT(17)) >> 17))
-struct cpg_pll_config {
- unsigned int extal_div;
- unsigned int pll1_mult;
- unsigned int pll3_mult;
-};
-
-static const struct cpg_pll_config cpg_pll_configs[16] __initconst = {
+static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[16] __initconst = {
/* EXTAL div PLL1 mult PLL3 mult */
{ 1, 192, 192, },
{ 1, 192, 128, },
@@ -538,112 +291,9 @@ static const struct cpg_pll_config cpg_pll_configs[16] __initconst = {
{ 2, 192, 192, },
};
-static const struct cpg_pll_config *cpg_pll_config __initdata;
-
-static
-struct clk * __init r8a7795_cpg_clk_register(struct device *dev,
- const struct cpg_core_clk *core,
- const struct cpg_mssr_info *info,
- struct clk **clks,
- void __iomem *base)
-{
- const struct clk *parent;
- unsigned int mult = 1;
- unsigned int div = 1;
- u32 value;
-
- parent = clks[core->parent];
- if (IS_ERR(parent))
- return ERR_CAST(parent);
-
- switch (core->type) {
- case CLK_TYPE_GEN3_MAIN:
- div = cpg_pll_config->extal_div;
- break;
-
- case CLK_TYPE_GEN3_PLL0:
- /*
- * PLL0 is a configurable multiplier clock. Register it as a
- * fixed factor clock for now as there's no generic multiplier
- * clock implementation and we currently have no need to change
- * the multiplier value.
- */
- value = readl(base + CPG_PLL0CR);
- mult = (((value >> 24) & 0x7f) + 1) * 2;
- break;
-
- case CLK_TYPE_GEN3_PLL1:
- mult = cpg_pll_config->pll1_mult;
- break;
-
- case CLK_TYPE_GEN3_PLL2:
- /*
- * PLL2 is a configurable multiplier clock. Register it as a
- * fixed factor clock for now as there's no generic multiplier
- * clock implementation and we currently have no need to change
- * the multiplier value.
- */
- value = readl(base + CPG_PLL2CR);
- mult = (((value >> 24) & 0x7f) + 1) * 2;
- break;
-
- case CLK_TYPE_GEN3_PLL3:
- mult = cpg_pll_config->pll3_mult;
- break;
-
- case CLK_TYPE_GEN3_PLL4:
- /*
- * PLL4 is a configurable multiplier clock. Register it as a
- * fixed factor clock for now as there's no generic multiplier
- * clock implementation and we currently have no need to change
- * the multiplier value.
- */
- value = readl(base + CPG_PLL4CR);
- mult = (((value >> 24) & 0x7f) + 1) * 2;
- break;
-
- case CLK_TYPE_GEN3_SD:
- return cpg_sd_clk_register(core, base, __clk_get_name(parent));
-
- case CLK_TYPE_GEN3_R:
- /* RINT is default. Only if EXTALR is populated, we switch to it */
- value = readl(base + CPG_RCKCR) & 0x3f;
-
- if (clk_get_rate(clks[CLK_EXTALR])) {
- parent = clks[CLK_EXTALR];
- value |= BIT(15);
- }
-
- writel(value, base + CPG_RCKCR);
- break;
-
- default:
- return ERR_PTR(-EINVAL);
- }
-
- return clk_register_fixed_factor(NULL, core->name,
- __clk_get_name(parent), 0, mult, div);
-}
-
-/*
- * Reset register definitions.
- */
-#define MODEMR 0xe6160060
-
-static u32 rcar_gen3_read_mode_pins(void)
-{
- void __iomem *modemr = ioremap_nocache(MODEMR, 4);
- u32 mode;
-
- BUG_ON(!modemr);
- mode = ioread32(modemr);
- iounmap(modemr);
-
- return mode;
-}
-
static int __init r8a7795_cpg_mssr_init(struct device *dev)
{
+ const struct rcar_gen3_cpg_pll_config *cpg_pll_config;
u32 cpg_mode = rcar_gen3_read_mode_pins();
cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
@@ -652,7 +302,7 @@ static int __init r8a7795_cpg_mssr_init(struct device *dev)
return -EINVAL;
}
- return 0;
+ return rcar_gen3_cpg_init(cpg_pll_config, CLK_EXTALR);
}
const struct cpg_mssr_info r8a7795_cpg_mssr_info __initconst = {
@@ -673,5 +323,5 @@ const struct cpg_mssr_info r8a7795_cpg_mssr_info __initconst = {
/* Callbacks */
.init = r8a7795_cpg_mssr_init,
- .cpg_clk_register = r8a7795_cpg_clk_register,
+ .cpg_clk_register = rcar_gen3_cpg_clk_register,
};
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
new file mode 100644
index 0000000000000000..bb4f2f9a8c2f5ba8
--- /dev/null
+++ b/drivers/clk/renesas/rcar-gen3-cpg.c
@@ -0,0 +1,359 @@
+/*
+ * R-Car Gen3 Clock Pulse Generator
+ *
+ * Copyright (C) 2015-2016 Glider bvba
+ *
+ * Based on clk-rcar-gen3.c
+ *
+ * Copyright (C) 2015 Renesas Electronics Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ */
+
+#include <linux/bug.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+
+#include "renesas-cpg-mssr.h"
+#include "rcar-gen3-cpg.h"
+
+#define CPG_PLL0CR 0x00d8
+#define CPG_PLL2CR 0x002c
+#define CPG_PLL4CR 0x01f4
+
+
+/*
+ * SDn Clock
+ */
+#define CPG_SD_STP_HCK BIT(9)
+#define CPG_SD_STP_CK BIT(8)
+
+#define CPG_SD_STP_MASK (CPG_SD_STP_HCK | CPG_SD_STP_CK)
+#define CPG_SD_FC_MASK (0x7 << 2 | 0x3 << 0)
+
+#define CPG_SD_DIV_TABLE_DATA(stp_hck, stp_ck, sd_srcfc, sd_fc, sd_div) \
+{ \
+ .val = ((stp_hck) ? CPG_SD_STP_HCK : 0) | \
+ ((stp_ck) ? CPG_SD_STP_CK : 0) | \
+ ((sd_srcfc) << 2) | \
+ ((sd_fc) << 0), \
+ .div = (sd_div), \
+}
+
+struct sd_div_table {
+ u32 val;
+ unsigned int div;
+};
+
+struct sd_clock {
+ struct clk_hw hw;
+ void __iomem *reg;
+ const struct sd_div_table *div_table;
+ unsigned int div_num;
+ unsigned int div_min;
+ unsigned int div_max;
+};
+
+/* SDn divider
+ * sd_srcfc sd_fc div
+ * stp_hck stp_ck (div) (div) = sd_srcfc x sd_fc
+ *-------------------------------------------------------------------
+ * 0 0 0 (1) 1 (4) 4
+ * 0 0 1 (2) 1 (4) 8
+ * 1 0 2 (4) 1 (4) 16
+ * 1 0 3 (8) 1 (4) 32
+ * 1 0 4 (16) 1 (4) 64
+ * 0 0 0 (1) 0 (2) 2
+ * 0 0 1 (2) 0 (2) 4
+ * 1 0 2 (4) 0 (2) 8
+ * 1 0 3 (8) 0 (2) 16
+ * 1 0 4 (16) 0 (2) 32
+ */
+static const struct sd_div_table cpg_sd_div_table[] = {
+/* CPG_SD_DIV_TABLE_DATA(stp_hck, stp_ck, sd_srcfc, sd_fc, sd_div) */
+ CPG_SD_DIV_TABLE_DATA(0, 0, 0, 1, 4),
+ CPG_SD_DIV_TABLE_DATA(0, 0, 1, 1, 8),
+ CPG_SD_DIV_TABLE_DATA(1, 0, 2, 1, 16),
+ CPG_SD_DIV_TABLE_DATA(1, 0, 3, 1, 32),
+ CPG_SD_DIV_TABLE_DATA(1, 0, 4, 1, 64),
+ CPG_SD_DIV_TABLE_DATA(0, 0, 0, 0, 2),
+ CPG_SD_DIV_TABLE_DATA(0, 0, 1, 0, 4),
+ CPG_SD_DIV_TABLE_DATA(1, 0, 2, 0, 8),
+ CPG_SD_DIV_TABLE_DATA(1, 0, 3, 0, 16),
+ CPG_SD_DIV_TABLE_DATA(1, 0, 4, 0, 32),
+};
+
+#define to_sd_clock(_hw) container_of(_hw, struct sd_clock, hw)
+
+static int cpg_sd_clock_enable(struct clk_hw *hw)
+{
+ struct sd_clock *clock = to_sd_clock(hw);
+ u32 val, sd_fc;
+ unsigned int i;
+
+ val = clk_readl(clock->reg);
+
+ sd_fc = val & CPG_SD_FC_MASK;
+ for (i = 0; i < clock->div_num; i++)
+ if (sd_fc == (clock->div_table[i].val & CPG_SD_FC_MASK))
+ break;
+
+ if (i >= clock->div_num)
+ return -EINVAL;
+
+ val &= ~(CPG_SD_STP_MASK);
+ val |= clock->div_table[i].val & CPG_SD_STP_MASK;
+
+ clk_writel(val, clock->reg);
+
+ return 0;
+}
+
+static void cpg_sd_clock_disable(struct clk_hw *hw)
+{
+ struct sd_clock *clock = to_sd_clock(hw);
+
+ clk_writel(clk_readl(clock->reg) | CPG_SD_STP_MASK, clock->reg);
+}
+
+static int cpg_sd_clock_is_enabled(struct clk_hw *hw)
+{
+ struct sd_clock *clock = to_sd_clock(hw);
+
+ return !(clk_readl(clock->reg) & CPG_SD_STP_MASK);
+}
+
+static unsigned long cpg_sd_clock_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct sd_clock *clock = to_sd_clock(hw);
+ unsigned long rate = parent_rate;
+ u32 val, sd_fc;
+ unsigned int i;
+
+ val = clk_readl(clock->reg);
+
+ sd_fc = val & CPG_SD_FC_MASK;
+ for (i = 0; i < clock->div_num; i++)
+ if (sd_fc == (clock->div_table[i].val & CPG_SD_FC_MASK))
+ break;
+
+ if (i >= clock->div_num)
+ return -EINVAL;
+
+ return DIV_ROUND_CLOSEST(rate, clock->div_table[i].div);
+}
+
+static unsigned int cpg_sd_clock_calc_div(struct sd_clock *clock,
+ unsigned long rate,
+ unsigned long parent_rate)
+{
+ unsigned int div;
+
+ if (!rate)
+ rate = 1;
+
+ div = DIV_ROUND_CLOSEST(parent_rate, rate);
+
+ return clamp_t(unsigned int, div, clock->div_min, clock->div_max);
+}
+
+static long cpg_sd_clock_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct sd_clock *clock = to_sd_clock(hw);
+ unsigned int div = cpg_sd_clock_calc_div(clock, rate, *parent_rate);
+
+ return DIV_ROUND_CLOSEST(*parent_rate, div);
+}
+
+static int cpg_sd_clock_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct sd_clock *clock = to_sd_clock(hw);
+ unsigned int div = cpg_sd_clock_calc_div(clock, rate, parent_rate);
+ u32 val;
+ unsigned int i;
+
+ for (i = 0; i < clock->div_num; i++)
+ if (div == clock->div_table[i].div)
+ break;
+
+ if (i >= clock->div_num)
+ return -EINVAL;
+
+ val = clk_readl(clock->reg);
+ val &= ~(CPG_SD_STP_MASK | CPG_SD_FC_MASK);
+ val |= clock->div_table[i].val & (CPG_SD_STP_MASK | CPG_SD_FC_MASK);
+ clk_writel(val, clock->reg);
+
+ return 0;
+}
+
+static const struct clk_ops cpg_sd_clock_ops = {
+ .enable = cpg_sd_clock_enable,
+ .disable = cpg_sd_clock_disable,
+ .is_enabled = cpg_sd_clock_is_enabled,
+ .recalc_rate = cpg_sd_clock_recalc_rate,
+ .round_rate = cpg_sd_clock_round_rate,
+ .set_rate = cpg_sd_clock_set_rate,
+};
+
+static struct clk * __init cpg_sd_clk_register(const struct cpg_core_clk *core,
+ void __iomem *base,
+ const char *parent_name)
+{
+ struct clk_init_data init;
+ struct sd_clock *clock;
+ struct clk *clk;
+ unsigned int i;
+
+ clock = kzalloc(sizeof(*clock), GFP_KERNEL);
+ if (!clock)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = core->name;
+ init.ops = &cpg_sd_clock_ops;
+ init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT;
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+
+ clock->reg = base + core->offset;
+ clock->hw.init = &init;
+ clock->div_table = cpg_sd_div_table;
+ clock->div_num = ARRAY_SIZE(cpg_sd_div_table);
+
+ clock->div_max = clock->div_table[0].div;
+ clock->div_min = clock->div_max;
+ for (i = 1; i < clock->div_num; i++) {
+ clock->div_max = max(clock->div_max, clock->div_table[i].div);
+ clock->div_min = min(clock->div_min, clock->div_table[i].div);
+ }
+
+ clk = clk_register(NULL, &clock->hw);
+ if (IS_ERR(clk))
+ kfree(clock);
+
+ return clk;
+}
+
+
+static const struct rcar_gen3_cpg_pll_config *cpg_pll_config __initdata;
+static unsigned int cpg_clk_extalr __initdata;
+
+struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
+ const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
+ struct clk **clks, void __iomem *base)
+{
+ const struct clk *parent;
+ unsigned int mult = 1;
+ unsigned int div = 1;
+ u32 value;
+
+ parent = clks[core->parent];
+ if (IS_ERR(parent))
+ return ERR_CAST(parent);
+
+ switch (core->type) {
+ case CLK_TYPE_GEN3_MAIN:
+ div = cpg_pll_config->extal_div;
+ break;
+
+ case CLK_TYPE_GEN3_PLL0:
+ /*
+ * PLL0 is a configurable multiplier clock. Register it as a
+ * fixed factor clock for now as there's no generic multiplier
+ * clock implementation and we currently have no need to change
+ * the multiplier value.
+ */
+ value = readl(base + CPG_PLL0CR);
+ mult = (((value >> 24) & 0x7f) + 1) * 2;
+ break;
+
+ case CLK_TYPE_GEN3_PLL1:
+ mult = cpg_pll_config->pll1_mult;
+ break;
+
+ case CLK_TYPE_GEN3_PLL2:
+ /*
+ * PLL2 is a configurable multiplier clock. Register it as a
+ * fixed factor clock for now as there's no generic multiplier
+ * clock implementation and we currently have no need to change
+ * the multiplier value.
+ */
+ value = readl(base + CPG_PLL2CR);
+ mult = (((value >> 24) & 0x7f) + 1) * 2;
+ break;
+
+ case CLK_TYPE_GEN3_PLL3:
+ mult = cpg_pll_config->pll3_mult;
+ break;
+
+ case CLK_TYPE_GEN3_PLL4:
+ /*
+ * PLL4 is a configurable multiplier clock. Register it as a
+ * fixed factor clock for now as there's no generic multiplier
+ * clock implementation and we currently have no need to change
+ * the multiplier value.
+ */
+ value = readl(base + CPG_PLL4CR);
+ mult = (((value >> 24) & 0x7f) + 1) * 2;
+ break;
+
+ case CLK_TYPE_GEN3_SD:
+ return cpg_sd_clk_register(core, base, __clk_get_name(parent));
+
+ case CLK_TYPE_GEN3_R:
+ /*
+ * RINT is default.
+ * Only if EXTALR is populated, we switch to it.
+ */
+ value = readl(base + CPG_RCKCR) & 0x3f;
+
+ if (clk_get_rate(clks[cpg_clk_extalr])) {
+ parent = clks[cpg_clk_extalr];
+ value |= BIT(15);
+ }
+
+ writel(value, base + CPG_RCKCR);
+ break;
+
+ default:
+ return ERR_PTR(-EINVAL);
+ }
+
+ return clk_register_fixed_factor(NULL, core->name,
+ __clk_get_name(parent), 0, mult, div);
+}
+
+/*
+ * Reset register definitions.
+ */
+#define MODEMR 0xe6160060
+
+u32 __init rcar_gen3_read_mode_pins(void)
+{
+ void __iomem *modemr = ioremap_nocache(MODEMR, 4);
+ u32 mode;
+
+ BUG_ON(!modemr);
+ mode = ioread32(modemr);
+ iounmap(modemr);
+
+ return mode;
+}
+
+int __init rcar_gen3_cpg_init(const struct rcar_gen3_cpg_pll_config *config,
+ unsigned int clk_extalr)
+{
+ cpg_pll_config = config;
+ cpg_clk_extalr = clk_extalr;
+ return 0;
+}
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.h b/drivers/clk/renesas/rcar-gen3-cpg.h
new file mode 100644
index 0000000000000000..f699085147d1aece
--- /dev/null
+++ b/drivers/clk/renesas/rcar-gen3-cpg.h
@@ -0,0 +1,43 @@
+/*
+ * R-Car Gen3 Clock Pulse Generator
+ *
+ * Copyright (C) 2015-2016 Glider bvba
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ */
+
+#ifndef __CLK_RENESAS_RCAR_GEN3_CPG_H__
+#define __CLK_RENESAS_RCAR_GEN3_CPG_H__
+
+enum rcar_gen3_clk_types {
+ CLK_TYPE_GEN3_MAIN = CLK_TYPE_CUSTOM,
+ CLK_TYPE_GEN3_PLL0,
+ CLK_TYPE_GEN3_PLL1,
+ CLK_TYPE_GEN3_PLL2,
+ CLK_TYPE_GEN3_PLL3,
+ CLK_TYPE_GEN3_PLL4,
+ CLK_TYPE_GEN3_SD,
+ CLK_TYPE_GEN3_R,
+};
+
+#define DEF_GEN3_SD(_name, _id, _parent, _offset) \
+ DEF_BASE(_name, _id, CLK_TYPE_GEN3_SD, _parent, .offset = _offset)
+
+struct rcar_gen3_cpg_pll_config {
+ unsigned int extal_div;
+ unsigned int pll1_mult;
+ unsigned int pll3_mult;
+};
+
+#define CPG_RCKCR 0x240
+
+u32 rcar_gen3_read_mode_pins(void);
+struct clk *rcar_gen3_cpg_clk_register(struct device *dev,
+ const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
+ struct clk **clks, void __iomem *base);
+int rcar_gen3_cpg_init(const struct rcar_gen3_cpg_pll_config *config,
+ unsigned int clk_extalr);
+
+#endif
--
1.9.1
--
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WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert+renesas@glider.be>
To: Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>
Cc: Simon Horman <horms+renesas@verge.net.au>,
Magnus Damm <damm+renesas@opensource.se>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
linux-clk@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
devicetree@vger.kernel.org,
Geert Uytterhoeven <geert+renesas@glider.be>
Subject: [PATCH 3/4] clk: renesas: cpg-mssr: Extract common R-Car Gen3 support code
Date: Wed, 4 May 2016 16:35:42 +0200 [thread overview]
Message-ID: <1462372543-31835-4-git-send-email-geert+renesas@glider.be> (raw)
In-Reply-To: <1462372543-31835-1-git-send-email-geert+renesas@glider.be>
Extract the code to support parts common to all members of the R-Car
Gen3 SoC family into a separate file, to ease sharing among SoC-specific
drivers.
Note that while the cpg_pll_configs[] arrays and the selection of the
config based on the MODE bits are identical on R-Car H3 and R-Car M3-W,
they are not common, and may be different on other R-Car Gen3 SoCs.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
drivers/clk/renesas/Makefile | 2 +-
drivers/clk/renesas/r8a7795-cpg-mssr.c | 360 +--------------------------------
drivers/clk/renesas/rcar-gen3-cpg.c | 359 ++++++++++++++++++++++++++++++++
drivers/clk/renesas/rcar-gen3-cpg.h | 43 ++++
4 files changed, 408 insertions(+), 356 deletions(-)
create mode 100644 drivers/clk/renesas/rcar-gen3-cpg.c
create mode 100644 drivers/clk/renesas/rcar-gen3-cpg.h
diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile
index ead8bb8435249493..88924c95808c3b2e 100644
--- a/drivers/clk/renesas/Makefile
+++ b/drivers/clk/renesas/Makefile
@@ -8,7 +8,7 @@ obj-$(CONFIG_ARCH_R8A7790) += clk-rcar-gen2.o clk-div6.o
obj-$(CONFIG_ARCH_R8A7791) += clk-rcar-gen2.o clk-div6.o
obj-$(CONFIG_ARCH_R8A7793) += clk-rcar-gen2.o clk-div6.o
obj-$(CONFIG_ARCH_R8A7794) += clk-rcar-gen2.o clk-div6.o
-obj-$(CONFIG_ARCH_R8A7795) += r8a7795-cpg-mssr.o
+obj-$(CONFIG_ARCH_R8A7795) += r8a7795-cpg-mssr.o rcar-gen3-cpg.o
obj-$(CONFIG_ARCH_SH73A0) += clk-sh73a0.o clk-div6.o
obj-$(CONFIG_CLK_RENESAS_CPG_MSSR) += renesas-cpg-mssr.o clk-div6.o
diff --git a/drivers/clk/renesas/r8a7795-cpg-mssr.c b/drivers/clk/renesas/r8a7795-cpg-mssr.c
index ca5519c583d4bf57..e53aff5b23ad4967 100644
--- a/drivers/clk/renesas/r8a7795-cpg-mssr.c
+++ b/drivers/clk/renesas/r8a7795-cpg-mssr.c
@@ -12,22 +12,14 @@
* the Free Software Foundation; version 2 of the License.
*/
-#include <linux/bug.h>
-#include <linux/clk.h>
-#include <linux/clk-provider.h>
#include <linux/device.h>
-#include <linux/err.h>
#include <linux/init.h>
-#include <linux/io.h>
#include <linux/kernel.h>
-#include <linux/of.h>
-#include <linux/slab.h>
#include <dt-bindings/clock/r8a7795-cpg-mssr.h>
#include "renesas-cpg-mssr.h"
-
-#define CPG_RCKCR 0x240
+#include "rcar-gen3-cpg.h"
enum clk_ids {
/* Core Clock Outputs exported to DT */
@@ -58,20 +50,6 @@ enum clk_ids {
MOD_CLK_BASE
};
-enum r8a7795_clk_types {
- CLK_TYPE_GEN3_MAIN = CLK_TYPE_CUSTOM,
- CLK_TYPE_GEN3_PLL0,
- CLK_TYPE_GEN3_PLL1,
- CLK_TYPE_GEN3_PLL2,
- CLK_TYPE_GEN3_PLL3,
- CLK_TYPE_GEN3_PLL4,
- CLK_TYPE_GEN3_SD,
- CLK_TYPE_GEN3_R,
-};
-
-#define DEF_GEN3_SD(_name, _id, _parent, _offset) \
- DEF_BASE(_name, _id, CLK_TYPE_GEN3_SD, _parent, .offset = _offset)
-
static const struct cpg_core_clk r8a7795_core_clks[] __initconst = {
/* External Clock Inputs */
DEF_INPUT("extal", CLK_EXTAL),
@@ -262,225 +240,6 @@ static const unsigned int r8a7795_crit_mod_clks[] __initconst = {
MOD_CLK_ID(408), /* INTC-AP (GIC) */
};
-/* -----------------------------------------------------------------------------
- * SDn Clock
- *
- */
-#define CPG_SD_STP_HCK BIT(9)
-#define CPG_SD_STP_CK BIT(8)
-
-#define CPG_SD_STP_MASK (CPG_SD_STP_HCK | CPG_SD_STP_CK)
-#define CPG_SD_FC_MASK (0x7 << 2 | 0x3 << 0)
-
-#define CPG_SD_DIV_TABLE_DATA(stp_hck, stp_ck, sd_srcfc, sd_fc, sd_div) \
-{ \
- .val = ((stp_hck) ? CPG_SD_STP_HCK : 0) | \
- ((stp_ck) ? CPG_SD_STP_CK : 0) | \
- ((sd_srcfc) << 2) | \
- ((sd_fc) << 0), \
- .div = (sd_div), \
-}
-
-struct sd_div_table {
- u32 val;
- unsigned int div;
-};
-
-struct sd_clock {
- struct clk_hw hw;
- void __iomem *reg;
- const struct sd_div_table *div_table;
- unsigned int div_num;
- unsigned int div_min;
- unsigned int div_max;
-};
-
-/* SDn divider
- * sd_srcfc sd_fc div
- * stp_hck stp_ck (div) (div) = sd_srcfc x sd_fc
- *-------------------------------------------------------------------
- * 0 0 0 (1) 1 (4) 4
- * 0 0 1 (2) 1 (4) 8
- * 1 0 2 (4) 1 (4) 16
- * 1 0 3 (8) 1 (4) 32
- * 1 0 4 (16) 1 (4) 64
- * 0 0 0 (1) 0 (2) 2
- * 0 0 1 (2) 0 (2) 4
- * 1 0 2 (4) 0 (2) 8
- * 1 0 3 (8) 0 (2) 16
- * 1 0 4 (16) 0 (2) 32
- */
-static const struct sd_div_table cpg_sd_div_table[] = {
-/* CPG_SD_DIV_TABLE_DATA(stp_hck, stp_ck, sd_srcfc, sd_fc, sd_div) */
- CPG_SD_DIV_TABLE_DATA(0, 0, 0, 1, 4),
- CPG_SD_DIV_TABLE_DATA(0, 0, 1, 1, 8),
- CPG_SD_DIV_TABLE_DATA(1, 0, 2, 1, 16),
- CPG_SD_DIV_TABLE_DATA(1, 0, 3, 1, 32),
- CPG_SD_DIV_TABLE_DATA(1, 0, 4, 1, 64),
- CPG_SD_DIV_TABLE_DATA(0, 0, 0, 0, 2),
- CPG_SD_DIV_TABLE_DATA(0, 0, 1, 0, 4),
- CPG_SD_DIV_TABLE_DATA(1, 0, 2, 0, 8),
- CPG_SD_DIV_TABLE_DATA(1, 0, 3, 0, 16),
- CPG_SD_DIV_TABLE_DATA(1, 0, 4, 0, 32),
-};
-
-#define to_sd_clock(_hw) container_of(_hw, struct sd_clock, hw)
-
-static int cpg_sd_clock_enable(struct clk_hw *hw)
-{
- struct sd_clock *clock = to_sd_clock(hw);
- u32 val, sd_fc;
- unsigned int i;
-
- val = clk_readl(clock->reg);
-
- sd_fc = val & CPG_SD_FC_MASK;
- for (i = 0; i < clock->div_num; i++)
- if (sd_fc == (clock->div_table[i].val & CPG_SD_FC_MASK))
- break;
-
- if (i >= clock->div_num)
- return -EINVAL;
-
- val &= ~(CPG_SD_STP_MASK);
- val |= clock->div_table[i].val & CPG_SD_STP_MASK;
-
- clk_writel(val, clock->reg);
-
- return 0;
-}
-
-static void cpg_sd_clock_disable(struct clk_hw *hw)
-{
- struct sd_clock *clock = to_sd_clock(hw);
-
- clk_writel(clk_readl(clock->reg) | CPG_SD_STP_MASK, clock->reg);
-}
-
-static int cpg_sd_clock_is_enabled(struct clk_hw *hw)
-{
- struct sd_clock *clock = to_sd_clock(hw);
-
- return !(clk_readl(clock->reg) & CPG_SD_STP_MASK);
-}
-
-static unsigned long cpg_sd_clock_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct sd_clock *clock = to_sd_clock(hw);
- unsigned long rate = parent_rate;
- u32 val, sd_fc;
- unsigned int i;
-
- val = clk_readl(clock->reg);
-
- sd_fc = val & CPG_SD_FC_MASK;
- for (i = 0; i < clock->div_num; i++)
- if (sd_fc == (clock->div_table[i].val & CPG_SD_FC_MASK))
- break;
-
- if (i >= clock->div_num)
- return -EINVAL;
-
- return DIV_ROUND_CLOSEST(rate, clock->div_table[i].div);
-}
-
-static unsigned int cpg_sd_clock_calc_div(struct sd_clock *clock,
- unsigned long rate,
- unsigned long parent_rate)
-{
- unsigned int div;
-
- if (!rate)
- rate = 1;
-
- div = DIV_ROUND_CLOSEST(parent_rate, rate);
-
- return clamp_t(unsigned int, div, clock->div_min, clock->div_max);
-}
-
-static long cpg_sd_clock_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
-{
- struct sd_clock *clock = to_sd_clock(hw);
- unsigned int div = cpg_sd_clock_calc_div(clock, rate, *parent_rate);
-
- return DIV_ROUND_CLOSEST(*parent_rate, div);
-}
-
-static int cpg_sd_clock_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
-{
- struct sd_clock *clock = to_sd_clock(hw);
- unsigned int div = cpg_sd_clock_calc_div(clock, rate, parent_rate);
- u32 val;
- unsigned int i;
-
- for (i = 0; i < clock->div_num; i++)
- if (div == clock->div_table[i].div)
- break;
-
- if (i >= clock->div_num)
- return -EINVAL;
-
- val = clk_readl(clock->reg);
- val &= ~(CPG_SD_STP_MASK | CPG_SD_FC_MASK);
- val |= clock->div_table[i].val & (CPG_SD_STP_MASK | CPG_SD_FC_MASK);
- clk_writel(val, clock->reg);
-
- return 0;
-}
-
-static const struct clk_ops cpg_sd_clock_ops = {
- .enable = cpg_sd_clock_enable,
- .disable = cpg_sd_clock_disable,
- .is_enabled = cpg_sd_clock_is_enabled,
- .recalc_rate = cpg_sd_clock_recalc_rate,
- .round_rate = cpg_sd_clock_round_rate,
- .set_rate = cpg_sd_clock_set_rate,
-};
-
-static struct clk * __init cpg_sd_clk_register(const struct cpg_core_clk *core,
- void __iomem *base,
- const char *parent_name)
-{
- struct clk_init_data init;
- struct sd_clock *clock;
- struct clk *clk;
- unsigned int i;
-
- clock = kzalloc(sizeof(*clock), GFP_KERNEL);
- if (!clock)
- return ERR_PTR(-ENOMEM);
-
- init.name = core->name;
- init.ops = &cpg_sd_clock_ops;
- init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT;
- init.parent_names = &parent_name;
- init.num_parents = 1;
-
- clock->reg = base + core->offset;
- clock->hw.init = &init;
- clock->div_table = cpg_sd_div_table;
- clock->div_num = ARRAY_SIZE(cpg_sd_div_table);
-
- clock->div_max = clock->div_table[0].div;
- clock->div_min = clock->div_max;
- for (i = 1; i < clock->div_num; i++) {
- clock->div_max = max(clock->div_max, clock->div_table[i].div);
- clock->div_min = min(clock->div_min, clock->div_table[i].div);
- }
-
- clk = clk_register(NULL, &clock->hw);
- if (IS_ERR(clk))
- kfree(clock);
-
- return clk;
-}
-
-#define CPG_PLL0CR 0x00d8
-#define CPG_PLL2CR 0x002c
-#define CPG_PLL4CR 0x01f4
/*
* CPG Clock Data
@@ -512,13 +271,7 @@ static struct clk * __init cpg_sd_clk_register(const struct cpg_core_clk *core,
(((md) & BIT(19)) >> 18) | \
(((md) & BIT(17)) >> 17))
-struct cpg_pll_config {
- unsigned int extal_div;
- unsigned int pll1_mult;
- unsigned int pll3_mult;
-};
-
-static const struct cpg_pll_config cpg_pll_configs[16] __initconst = {
+static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[16] __initconst = {
/* EXTAL div PLL1 mult PLL3 mult */
{ 1, 192, 192, },
{ 1, 192, 128, },
@@ -538,112 +291,9 @@ static const struct cpg_pll_config cpg_pll_configs[16] __initconst = {
{ 2, 192, 192, },
};
-static const struct cpg_pll_config *cpg_pll_config __initdata;
-
-static
-struct clk * __init r8a7795_cpg_clk_register(struct device *dev,
- const struct cpg_core_clk *core,
- const struct cpg_mssr_info *info,
- struct clk **clks,
- void __iomem *base)
-{
- const struct clk *parent;
- unsigned int mult = 1;
- unsigned int div = 1;
- u32 value;
-
- parent = clks[core->parent];
- if (IS_ERR(parent))
- return ERR_CAST(parent);
-
- switch (core->type) {
- case CLK_TYPE_GEN3_MAIN:
- div = cpg_pll_config->extal_div;
- break;
-
- case CLK_TYPE_GEN3_PLL0:
- /*
- * PLL0 is a configurable multiplier clock. Register it as a
- * fixed factor clock for now as there's no generic multiplier
- * clock implementation and we currently have no need to change
- * the multiplier value.
- */
- value = readl(base + CPG_PLL0CR);
- mult = (((value >> 24) & 0x7f) + 1) * 2;
- break;
-
- case CLK_TYPE_GEN3_PLL1:
- mult = cpg_pll_config->pll1_mult;
- break;
-
- case CLK_TYPE_GEN3_PLL2:
- /*
- * PLL2 is a configurable multiplier clock. Register it as a
- * fixed factor clock for now as there's no generic multiplier
- * clock implementation and we currently have no need to change
- * the multiplier value.
- */
- value = readl(base + CPG_PLL2CR);
- mult = (((value >> 24) & 0x7f) + 1) * 2;
- break;
-
- case CLK_TYPE_GEN3_PLL3:
- mult = cpg_pll_config->pll3_mult;
- break;
-
- case CLK_TYPE_GEN3_PLL4:
- /*
- * PLL4 is a configurable multiplier clock. Register it as a
- * fixed factor clock for now as there's no generic multiplier
- * clock implementation and we currently have no need to change
- * the multiplier value.
- */
- value = readl(base + CPG_PLL4CR);
- mult = (((value >> 24) & 0x7f) + 1) * 2;
- break;
-
- case CLK_TYPE_GEN3_SD:
- return cpg_sd_clk_register(core, base, __clk_get_name(parent));
-
- case CLK_TYPE_GEN3_R:
- /* RINT is default. Only if EXTALR is populated, we switch to it */
- value = readl(base + CPG_RCKCR) & 0x3f;
-
- if (clk_get_rate(clks[CLK_EXTALR])) {
- parent = clks[CLK_EXTALR];
- value |= BIT(15);
- }
-
- writel(value, base + CPG_RCKCR);
- break;
-
- default:
- return ERR_PTR(-EINVAL);
- }
-
- return clk_register_fixed_factor(NULL, core->name,
- __clk_get_name(parent), 0, mult, div);
-}
-
-/*
- * Reset register definitions.
- */
-#define MODEMR 0xe6160060
-
-static u32 rcar_gen3_read_mode_pins(void)
-{
- void __iomem *modemr = ioremap_nocache(MODEMR, 4);
- u32 mode;
-
- BUG_ON(!modemr);
- mode = ioread32(modemr);
- iounmap(modemr);
-
- return mode;
-}
-
static int __init r8a7795_cpg_mssr_init(struct device *dev)
{
+ const struct rcar_gen3_cpg_pll_config *cpg_pll_config;
u32 cpg_mode = rcar_gen3_read_mode_pins();
cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
@@ -652,7 +302,7 @@ static int __init r8a7795_cpg_mssr_init(struct device *dev)
return -EINVAL;
}
- return 0;
+ return rcar_gen3_cpg_init(cpg_pll_config, CLK_EXTALR);
}
const struct cpg_mssr_info r8a7795_cpg_mssr_info __initconst = {
@@ -673,5 +323,5 @@ const struct cpg_mssr_info r8a7795_cpg_mssr_info __initconst = {
/* Callbacks */
.init = r8a7795_cpg_mssr_init,
- .cpg_clk_register = r8a7795_cpg_clk_register,
+ .cpg_clk_register = rcar_gen3_cpg_clk_register,
};
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
new file mode 100644
index 0000000000000000..bb4f2f9a8c2f5ba8
--- /dev/null
+++ b/drivers/clk/renesas/rcar-gen3-cpg.c
@@ -0,0 +1,359 @@
+/*
+ * R-Car Gen3 Clock Pulse Generator
+ *
+ * Copyright (C) 2015-2016 Glider bvba
+ *
+ * Based on clk-rcar-gen3.c
+ *
+ * Copyright (C) 2015 Renesas Electronics Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ */
+
+#include <linux/bug.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+
+#include "renesas-cpg-mssr.h"
+#include "rcar-gen3-cpg.h"
+
+#define CPG_PLL0CR 0x00d8
+#define CPG_PLL2CR 0x002c
+#define CPG_PLL4CR 0x01f4
+
+
+/*
+ * SDn Clock
+ */
+#define CPG_SD_STP_HCK BIT(9)
+#define CPG_SD_STP_CK BIT(8)
+
+#define CPG_SD_STP_MASK (CPG_SD_STP_HCK | CPG_SD_STP_CK)
+#define CPG_SD_FC_MASK (0x7 << 2 | 0x3 << 0)
+
+#define CPG_SD_DIV_TABLE_DATA(stp_hck, stp_ck, sd_srcfc, sd_fc, sd_div) \
+{ \
+ .val = ((stp_hck) ? CPG_SD_STP_HCK : 0) | \
+ ((stp_ck) ? CPG_SD_STP_CK : 0) | \
+ ((sd_srcfc) << 2) | \
+ ((sd_fc) << 0), \
+ .div = (sd_div), \
+}
+
+struct sd_div_table {
+ u32 val;
+ unsigned int div;
+};
+
+struct sd_clock {
+ struct clk_hw hw;
+ void __iomem *reg;
+ const struct sd_div_table *div_table;
+ unsigned int div_num;
+ unsigned int div_min;
+ unsigned int div_max;
+};
+
+/* SDn divider
+ * sd_srcfc sd_fc div
+ * stp_hck stp_ck (div) (div) = sd_srcfc x sd_fc
+ *-------------------------------------------------------------------
+ * 0 0 0 (1) 1 (4) 4
+ * 0 0 1 (2) 1 (4) 8
+ * 1 0 2 (4) 1 (4) 16
+ * 1 0 3 (8) 1 (4) 32
+ * 1 0 4 (16) 1 (4) 64
+ * 0 0 0 (1) 0 (2) 2
+ * 0 0 1 (2) 0 (2) 4
+ * 1 0 2 (4) 0 (2) 8
+ * 1 0 3 (8) 0 (2) 16
+ * 1 0 4 (16) 0 (2) 32
+ */
+static const struct sd_div_table cpg_sd_div_table[] = {
+/* CPG_SD_DIV_TABLE_DATA(stp_hck, stp_ck, sd_srcfc, sd_fc, sd_div) */
+ CPG_SD_DIV_TABLE_DATA(0, 0, 0, 1, 4),
+ CPG_SD_DIV_TABLE_DATA(0, 0, 1, 1, 8),
+ CPG_SD_DIV_TABLE_DATA(1, 0, 2, 1, 16),
+ CPG_SD_DIV_TABLE_DATA(1, 0, 3, 1, 32),
+ CPG_SD_DIV_TABLE_DATA(1, 0, 4, 1, 64),
+ CPG_SD_DIV_TABLE_DATA(0, 0, 0, 0, 2),
+ CPG_SD_DIV_TABLE_DATA(0, 0, 1, 0, 4),
+ CPG_SD_DIV_TABLE_DATA(1, 0, 2, 0, 8),
+ CPG_SD_DIV_TABLE_DATA(1, 0, 3, 0, 16),
+ CPG_SD_DIV_TABLE_DATA(1, 0, 4, 0, 32),
+};
+
+#define to_sd_clock(_hw) container_of(_hw, struct sd_clock, hw)
+
+static int cpg_sd_clock_enable(struct clk_hw *hw)
+{
+ struct sd_clock *clock = to_sd_clock(hw);
+ u32 val, sd_fc;
+ unsigned int i;
+
+ val = clk_readl(clock->reg);
+
+ sd_fc = val & CPG_SD_FC_MASK;
+ for (i = 0; i < clock->div_num; i++)
+ if (sd_fc == (clock->div_table[i].val & CPG_SD_FC_MASK))
+ break;
+
+ if (i >= clock->div_num)
+ return -EINVAL;
+
+ val &= ~(CPG_SD_STP_MASK);
+ val |= clock->div_table[i].val & CPG_SD_STP_MASK;
+
+ clk_writel(val, clock->reg);
+
+ return 0;
+}
+
+static void cpg_sd_clock_disable(struct clk_hw *hw)
+{
+ struct sd_clock *clock = to_sd_clock(hw);
+
+ clk_writel(clk_readl(clock->reg) | CPG_SD_STP_MASK, clock->reg);
+}
+
+static int cpg_sd_clock_is_enabled(struct clk_hw *hw)
+{
+ struct sd_clock *clock = to_sd_clock(hw);
+
+ return !(clk_readl(clock->reg) & CPG_SD_STP_MASK);
+}
+
+static unsigned long cpg_sd_clock_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct sd_clock *clock = to_sd_clock(hw);
+ unsigned long rate = parent_rate;
+ u32 val, sd_fc;
+ unsigned int i;
+
+ val = clk_readl(clock->reg);
+
+ sd_fc = val & CPG_SD_FC_MASK;
+ for (i = 0; i < clock->div_num; i++)
+ if (sd_fc == (clock->div_table[i].val & CPG_SD_FC_MASK))
+ break;
+
+ if (i >= clock->div_num)
+ return -EINVAL;
+
+ return DIV_ROUND_CLOSEST(rate, clock->div_table[i].div);
+}
+
+static unsigned int cpg_sd_clock_calc_div(struct sd_clock *clock,
+ unsigned long rate,
+ unsigned long parent_rate)
+{
+ unsigned int div;
+
+ if (!rate)
+ rate = 1;
+
+ div = DIV_ROUND_CLOSEST(parent_rate, rate);
+
+ return clamp_t(unsigned int, div, clock->div_min, clock->div_max);
+}
+
+static long cpg_sd_clock_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct sd_clock *clock = to_sd_clock(hw);
+ unsigned int div = cpg_sd_clock_calc_div(clock, rate, *parent_rate);
+
+ return DIV_ROUND_CLOSEST(*parent_rate, div);
+}
+
+static int cpg_sd_clock_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct sd_clock *clock = to_sd_clock(hw);
+ unsigned int div = cpg_sd_clock_calc_div(clock, rate, parent_rate);
+ u32 val;
+ unsigned int i;
+
+ for (i = 0; i < clock->div_num; i++)
+ if (div == clock->div_table[i].div)
+ break;
+
+ if (i >= clock->div_num)
+ return -EINVAL;
+
+ val = clk_readl(clock->reg);
+ val &= ~(CPG_SD_STP_MASK | CPG_SD_FC_MASK);
+ val |= clock->div_table[i].val & (CPG_SD_STP_MASK | CPG_SD_FC_MASK);
+ clk_writel(val, clock->reg);
+
+ return 0;
+}
+
+static const struct clk_ops cpg_sd_clock_ops = {
+ .enable = cpg_sd_clock_enable,
+ .disable = cpg_sd_clock_disable,
+ .is_enabled = cpg_sd_clock_is_enabled,
+ .recalc_rate = cpg_sd_clock_recalc_rate,
+ .round_rate = cpg_sd_clock_round_rate,
+ .set_rate = cpg_sd_clock_set_rate,
+};
+
+static struct clk * __init cpg_sd_clk_register(const struct cpg_core_clk *core,
+ void __iomem *base,
+ const char *parent_name)
+{
+ struct clk_init_data init;
+ struct sd_clock *clock;
+ struct clk *clk;
+ unsigned int i;
+
+ clock = kzalloc(sizeof(*clock), GFP_KERNEL);
+ if (!clock)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = core->name;
+ init.ops = &cpg_sd_clock_ops;
+ init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT;
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+
+ clock->reg = base + core->offset;
+ clock->hw.init = &init;
+ clock->div_table = cpg_sd_div_table;
+ clock->div_num = ARRAY_SIZE(cpg_sd_div_table);
+
+ clock->div_max = clock->div_table[0].div;
+ clock->div_min = clock->div_max;
+ for (i = 1; i < clock->div_num; i++) {
+ clock->div_max = max(clock->div_max, clock->div_table[i].div);
+ clock->div_min = min(clock->div_min, clock->div_table[i].div);
+ }
+
+ clk = clk_register(NULL, &clock->hw);
+ if (IS_ERR(clk))
+ kfree(clock);
+
+ return clk;
+}
+
+
+static const struct rcar_gen3_cpg_pll_config *cpg_pll_config __initdata;
+static unsigned int cpg_clk_extalr __initdata;
+
+struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
+ const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
+ struct clk **clks, void __iomem *base)
+{
+ const struct clk *parent;
+ unsigned int mult = 1;
+ unsigned int div = 1;
+ u32 value;
+
+ parent = clks[core->parent];
+ if (IS_ERR(parent))
+ return ERR_CAST(parent);
+
+ switch (core->type) {
+ case CLK_TYPE_GEN3_MAIN:
+ div = cpg_pll_config->extal_div;
+ break;
+
+ case CLK_TYPE_GEN3_PLL0:
+ /*
+ * PLL0 is a configurable multiplier clock. Register it as a
+ * fixed factor clock for now as there's no generic multiplier
+ * clock implementation and we currently have no need to change
+ * the multiplier value.
+ */
+ value = readl(base + CPG_PLL0CR);
+ mult = (((value >> 24) & 0x7f) + 1) * 2;
+ break;
+
+ case CLK_TYPE_GEN3_PLL1:
+ mult = cpg_pll_config->pll1_mult;
+ break;
+
+ case CLK_TYPE_GEN3_PLL2:
+ /*
+ * PLL2 is a configurable multiplier clock. Register it as a
+ * fixed factor clock for now as there's no generic multiplier
+ * clock implementation and we currently have no need to change
+ * the multiplier value.
+ */
+ value = readl(base + CPG_PLL2CR);
+ mult = (((value >> 24) & 0x7f) + 1) * 2;
+ break;
+
+ case CLK_TYPE_GEN3_PLL3:
+ mult = cpg_pll_config->pll3_mult;
+ break;
+
+ case CLK_TYPE_GEN3_PLL4:
+ /*
+ * PLL4 is a configurable multiplier clock. Register it as a
+ * fixed factor clock for now as there's no generic multiplier
+ * clock implementation and we currently have no need to change
+ * the multiplier value.
+ */
+ value = readl(base + CPG_PLL4CR);
+ mult = (((value >> 24) & 0x7f) + 1) * 2;
+ break;
+
+ case CLK_TYPE_GEN3_SD:
+ return cpg_sd_clk_register(core, base, __clk_get_name(parent));
+
+ case CLK_TYPE_GEN3_R:
+ /*
+ * RINT is default.
+ * Only if EXTALR is populated, we switch to it.
+ */
+ value = readl(base + CPG_RCKCR) & 0x3f;
+
+ if (clk_get_rate(clks[cpg_clk_extalr])) {
+ parent = clks[cpg_clk_extalr];
+ value |= BIT(15);
+ }
+
+ writel(value, base + CPG_RCKCR);
+ break;
+
+ default:
+ return ERR_PTR(-EINVAL);
+ }
+
+ return clk_register_fixed_factor(NULL, core->name,
+ __clk_get_name(parent), 0, mult, div);
+}
+
+/*
+ * Reset register definitions.
+ */
+#define MODEMR 0xe6160060
+
+u32 __init rcar_gen3_read_mode_pins(void)
+{
+ void __iomem *modemr = ioremap_nocache(MODEMR, 4);
+ u32 mode;
+
+ BUG_ON(!modemr);
+ mode = ioread32(modemr);
+ iounmap(modemr);
+
+ return mode;
+}
+
+int __init rcar_gen3_cpg_init(const struct rcar_gen3_cpg_pll_config *config,
+ unsigned int clk_extalr)
+{
+ cpg_pll_config = config;
+ cpg_clk_extalr = clk_extalr;
+ return 0;
+}
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.h b/drivers/clk/renesas/rcar-gen3-cpg.h
new file mode 100644
index 0000000000000000..f699085147d1aece
--- /dev/null
+++ b/drivers/clk/renesas/rcar-gen3-cpg.h
@@ -0,0 +1,43 @@
+/*
+ * R-Car Gen3 Clock Pulse Generator
+ *
+ * Copyright (C) 2015-2016 Glider bvba
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ */
+
+#ifndef __CLK_RENESAS_RCAR_GEN3_CPG_H__
+#define __CLK_RENESAS_RCAR_GEN3_CPG_H__
+
+enum rcar_gen3_clk_types {
+ CLK_TYPE_GEN3_MAIN = CLK_TYPE_CUSTOM,
+ CLK_TYPE_GEN3_PLL0,
+ CLK_TYPE_GEN3_PLL1,
+ CLK_TYPE_GEN3_PLL2,
+ CLK_TYPE_GEN3_PLL3,
+ CLK_TYPE_GEN3_PLL4,
+ CLK_TYPE_GEN3_SD,
+ CLK_TYPE_GEN3_R,
+};
+
+#define DEF_GEN3_SD(_name, _id, _parent, _offset) \
+ DEF_BASE(_name, _id, CLK_TYPE_GEN3_SD, _parent, .offset = _offset)
+
+struct rcar_gen3_cpg_pll_config {
+ unsigned int extal_div;
+ unsigned int pll1_mult;
+ unsigned int pll3_mult;
+};
+
+#define CPG_RCKCR 0x240
+
+u32 rcar_gen3_read_mode_pins(void);
+struct clk *rcar_gen3_cpg_clk_register(struct device *dev,
+ const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
+ struct clk **clks, void __iomem *base);
+int rcar_gen3_cpg_init(const struct rcar_gen3_cpg_pll_config *config,
+ unsigned int clk_extalr);
+
+#endif
--
1.9.1
next prev parent reply other threads:[~2016-05-04 14:35 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-04 14:35 [PATCH 0/4] clk: renesas: cpg-mssr: Add support for R-Car M3-W Geert Uytterhoeven
2016-05-04 14:35 ` [PATCH 2/4] clk: renesas: Add r8a7796 CPG Core Clock Definitions Geert Uytterhoeven
[not found] ` <1462372543-31835-1-git-send-email-geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org>
2016-05-04 14:35 ` [PATCH 1/4] clk: renesas: cpg-mssr: Document r8a7796 support Geert Uytterhoeven
2016-05-04 14:35 ` Geert Uytterhoeven
2016-05-05 22:13 ` Rob Herring
2016-05-04 14:35 ` Geert Uytterhoeven [this message]
2016-05-04 14:35 ` [PATCH 3/4] clk: renesas: cpg-mssr: Extract common R-Car Gen3 support code Geert Uytterhoeven
2016-05-04 14:35 ` [PATCH 4/4] clk: renesas: cpg-mssr: Add support for R-Car M3-W Geert Uytterhoeven
2016-05-10 4:40 ` [RFC 0/4] Add Z clock support Khiem Nguyen
2016-05-10 4:55 ` [PATCH 0/2] cpufreq: rcar: Enable CPUFreq support Khiem Nguyen
2016-05-10 4:55 ` Khiem Nguyen
2016-05-10 4:55 ` Khiem Nguyen
2016-05-10 4:57 ` [PATCH 1/2] cpufreq: rcar: Add support for R8A7795 SoC Khiem Nguyen
2016-05-10 4:57 ` Khiem Nguyen
2016-05-10 4:59 ` [PATCH 2/2] cpufreq: rcar: Add support for R8A7796 SoC Khiem Nguyen
2016-05-10 4:59 ` Khiem Nguyen
2016-05-10 5:07 ` Viresh Kumar
2016-05-10 5:07 ` Viresh Kumar
2016-05-10 5:07 ` [PATCH 1/2] cpufreq: rcar: Add support for R8A7795 SoC Viresh Kumar
2016-05-10 5:07 ` Viresh Kumar
2016-05-10 8:17 ` Geert Uytterhoeven
2016-05-10 8:17 ` Geert Uytterhoeven
2016-05-10 8:19 ` Viresh Kumar
2016-05-10 8:19 ` Viresh Kumar
2016-05-13 8:55 ` [RFC 0/4] Add Z clock support Geert Uytterhoeven
2016-05-10 4:42 ` [RFC 1/4] clk: renesas: rcar-gen3-cpg: Add Z clock Khiem Nguyen
2016-05-13 8:54 ` Geert Uytterhoeven
2016-09-23 8:32 ` Geert Uytterhoeven
2016-05-10 4:43 ` [RFC 2/4] clk: renesas: r8a7795: " Khiem Nguyen
2016-05-10 4:44 ` [RFC 3/4] clk: renesas: r8a7796: " Khiem Nguyen
2016-05-10 7:39 ` Geert Uytterhoeven
2016-05-10 4:46 ` [RFC 4/4] arm64: dts: r8a7795: Add Z clock scaling support Khiem Nguyen
2016-05-17 13:03 ` Geert Uytterhoeven
2016-05-13 8:55 ` [RFC 2/4] clk: renesas: r8a7795: Add Z clock Geert Uytterhoeven
2016-05-26 2:35 ` [PATCH 0/4] clk: renesas: cpg-mssr: Add support for R-Car M3-W Simon Horman
2016-05-26 6:55 ` Geert Uytterhoeven
2016-05-27 0:49 ` Simon Horman
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