From: David Lechner <david@lechnology.com>
To: linux-clk@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Cc: Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>, Sekhar Nori <nsekhar@ti.com>,
Kevin Hilman <khilman@kernel.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
Adam Ford <aford173@gmail.com>,
linux-kernel@vger.kernel.org,
David Lechner <david@lechnology.com>
Subject: [PATCH v10 03/27] clk: davinci: psc: allow for dev == NULL
Date: Wed, 9 May 2018 12:25:42 -0500 [thread overview]
Message-ID: <20180509172606.29387-4-david@lechnology.com> (raw)
In-Reply-To: <20180509172606.29387-1-david@lechnology.com>
On some davinci SoCs, we need to register the PSC clocks during early
boot because they are needed for clocksource/clockevent. These changes
allow for dev == NULL because in this case, we won't have a platform
device for the clocks.
Some function declarations are moved to a public header files so that they can
be called from mach init code.
Signed-off-by: David Lechner <david@lechnology.com>
---
v10 changes:
- dropped helper functions that conditionally called devm_ versions of functions
v9 changes:
- new patch in v9
drivers/clk/davinci/psc-dm355.c | 2 +-
drivers/clk/davinci/psc-dm365.c | 2 +-
drivers/clk/davinci/psc-dm644x.c | 2 +-
drivers/clk/davinci/psc-dm646x.c | 2 +-
drivers/clk/davinci/psc.c | 27 ++++++++++++++++++++-------
include/linux/clk/davinci.h | 5 +++++
6 files changed, 29 insertions(+), 11 deletions(-)
diff --git a/drivers/clk/davinci/psc-dm355.c b/drivers/clk/davinci/psc-dm355.c
index 6995ecea2677..001288dfdfb1 100644
--- a/drivers/clk/davinci/psc-dm355.c
+++ b/drivers/clk/davinci/psc-dm355.c
@@ -68,7 +68,7 @@ static const struct davinci_lpsc_clk_info dm355_psc_info[] = {
{ }
};
-static int dm355_psc_init(struct device *dev, void __iomem *base)
+int dm355_psc_init(struct device *dev, void __iomem *base)
{
return davinci_psc_register_clocks(dev, dm355_psc_info, 42, base);
}
diff --git a/drivers/clk/davinci/psc-dm365.c b/drivers/clk/davinci/psc-dm365.c
index 3ad915f37376..5b5b55b0b59a 100644
--- a/drivers/clk/davinci/psc-dm365.c
+++ b/drivers/clk/davinci/psc-dm365.c
@@ -73,7 +73,7 @@ static const struct davinci_lpsc_clk_info dm365_psc_info[] = {
{ }
};
-static int dm365_psc_init(struct device *dev, void __iomem *base)
+int dm365_psc_init(struct device *dev, void __iomem *base)
{
return davinci_psc_register_clocks(dev, dm365_psc_info, 52, base);
}
diff --git a/drivers/clk/davinci/psc-dm644x.c b/drivers/clk/davinci/psc-dm644x.c
index c22367baa46f..74668931be48 100644
--- a/drivers/clk/davinci/psc-dm644x.c
+++ b/drivers/clk/davinci/psc-dm644x.c
@@ -63,7 +63,7 @@ static const struct davinci_lpsc_clk_info dm644x_psc_info[] = {
{ }
};
-static int dm644x_psc_init(struct device *dev, void __iomem *base)
+int dm644x_psc_init(struct device *dev, void __iomem *base)
{
return davinci_psc_register_clocks(dev, dm644x_psc_info, 41, base);
}
diff --git a/drivers/clk/davinci/psc-dm646x.c b/drivers/clk/davinci/psc-dm646x.c
index 468ef86ea40b..22473affa7cf 100644
--- a/drivers/clk/davinci/psc-dm646x.c
+++ b/drivers/clk/davinci/psc-dm646x.c
@@ -58,7 +58,7 @@ static const struct davinci_lpsc_clk_info dm646x_psc_info[] = {
{ }
};
-static int dm646x_psc_init(struct device *dev, void __iomem *base)
+int dm646x_psc_init(struct device *dev, void __iomem *base)
{
return davinci_psc_register_clocks(dev, dm646x_psc_info, 46, base);
}
diff --git a/drivers/clk/davinci/psc.c b/drivers/clk/davinci/psc.c
index ce170e600f09..421f9f7906f4 100644
--- a/drivers/clk/davinci/psc.c
+++ b/drivers/clk/davinci/psc.c
@@ -15,6 +15,7 @@
#include <linux/clk-provider.h>
#include <linux/clk.h>
+#include <linux/clk/davinci.h>
#include <linux/clkdev.h>
#include <linux/err.h>
#include <linux/of_address.h>
@@ -63,7 +64,7 @@ struct davinci_psc_data {
/**
* struct davinci_lpsc_clk - LPSC clock structure
- * @dev: the device that provides this LPSC
+ * @dev: the device that provides this LPSC or NULL
* @hw: clk_hw for the LPSC
* @pm_domain: power domain for the LPSC
* @genpd_clk: clock reference owned by @pm_domain
@@ -221,6 +222,7 @@ static void davinci_psc_genpd_detach_dev(struct generic_pm_domain *pm_domain,
/**
* davinci_lpsc_clk_register - register LPSC clock
+ * @dev: the clocks's device or NULL
* @name: name of this clock
* @parent_name: name of clock's parent
* @regmap: PSC MMIO region
@@ -238,7 +240,7 @@ davinci_lpsc_clk_register(struct device *dev, const char *name,
int ret;
bool is_on;
- lpsc = devm_kzalloc(dev, sizeof(*lpsc), GFP_KERNEL);
+ lpsc = kzalloc(sizeof(*lpsc), GFP_KERNEL);
if (!lpsc)
return ERR_PTR(-ENOMEM);
@@ -261,10 +263,14 @@ davinci_lpsc_clk_register(struct device *dev, const char *name,
lpsc->pd = pd;
lpsc->flags = flags;
- ret = devm_clk_hw_register(dev, &lpsc->hw);
+ ret = clk_hw_register(dev, &lpsc->hw);
if (ret < 0)
return ERR_PTR(ret);
+ /* for now, genpd is only registered when using device-tree */
+ if (!dev || !dev->of_node)
+ return lpsc;
+
/* genpd attach needs a way to look up this clock */
ret = clk_hw_register_clkdev(&lpsc->hw, name, best_dev_name(dev));
@@ -378,11 +384,11 @@ __davinci_psc_register_clocks(struct device *dev,
struct regmap *regmap;
int i, ret;
- psc = devm_kzalloc(dev, sizeof(*psc), GFP_KERNEL);
+ psc = kzalloc(sizeof(*psc), GFP_KERNEL);
if (!psc)
return ERR_PTR(-ENOMEM);
- clks = devm_kmalloc_array(dev, num_clks, sizeof(*clks), GFP_KERNEL);
+ clks = kmalloc_array(num_clks, sizeof(*clks), GFP_KERNEL);
if (!clks)
return ERR_PTR(-ENOMEM);
@@ -396,14 +402,14 @@ __davinci_psc_register_clocks(struct device *dev,
for (i = 0; i < num_clks; i++)
clks[i] = ERR_PTR(-ENOENT);
- pm_domains = devm_kcalloc(dev, num_clks, sizeof(*pm_domains), GFP_KERNEL);
+ pm_domains = kcalloc(num_clks, sizeof(*pm_domains), GFP_KERNEL);
if (!pm_domains)
return ERR_PTR(-ENOMEM);
psc->pm_data.domains = pm_domains;
psc->pm_data.num_domains = num_clks;
- regmap = devm_regmap_init_mmio(dev, base, &davinci_psc_regmap_config);
+ regmap = regmap_init_mmio(dev, base, &davinci_psc_regmap_config);
if (IS_ERR(regmap))
return ERR_CAST(regmap);
@@ -423,6 +429,13 @@ __davinci_psc_register_clocks(struct device *dev,
pm_domains[info->md] = &lpsc->pm_domain;
}
+ /*
+ * for now, a reset controller is only registered when there is a device
+ * to associate it with.
+ */
+ if (!dev)
+ return psc;
+
psc->rcdev.ops = &davinci_psc_reset_ops;
psc->rcdev.owner = THIS_MODULE;
psc->rcdev.dev = dev;
diff --git a/include/linux/clk/davinci.h b/include/linux/clk/davinci.h
index ebdd9df1c0ef..62764c5cc86e 100644
--- a/include/linux/clk/davinci.h
+++ b/include/linux/clk/davinci.h
@@ -21,4 +21,9 @@ int dm365_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgch
int dm644x_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);
int dm646x_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);
+int dm355_psc_init(struct device *dev, void __iomem *base);
+int dm365_psc_init(struct device *dev, void __iomem *base);
+int dm644x_psc_init(struct device *dev, void __iomem *base);
+int dm646x_psc_init(struct device *dev, void __iomem *base);
+
#endif /* __LINUX_CLK_DAVINCI_PLL_H___ */
--
2.17.0
next prev parent reply other threads:[~2018-05-09 17:31 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-09 17:25 [PATCH v10 00/27] ARM: davinci: convert to common clock framework David Lechner
2018-05-09 17:25 ` [PATCH v10 01/27] clk: davinci: pll: allow dev == NULL David Lechner
2018-05-09 17:25 ` [PATCH v10 02/27] clk: davinci: da850-pll: change PLL0 to CLK_OF_DECLARE David Lechner
2018-05-15 13:31 ` Sekhar Nori
2018-05-15 15:42 ` David Lechner
2018-05-16 5:51 ` Sekhar Nori
2018-05-09 17:25 ` David Lechner [this message]
2018-05-15 13:42 ` [PATCH v10 03/27] clk: davinci: psc: allow for dev == NULL Sekhar Nori
2018-05-09 17:25 ` [PATCH v10 04/27] ARM: davinci: pass clock as parameter to davinci_timer_init() David Lechner
2018-05-09 17:25 ` [PATCH v10 05/27] ARM: davinci: da830: add new clock init using common clock framework David Lechner
2018-05-09 17:25 ` [PATCH v10 06/27] ARM: davinci: da850: " David Lechner
2018-05-09 17:25 ` [PATCH v10 07/27] ARM: davinci: dm355: " David Lechner
2018-05-09 17:25 ` [PATCH v10 08/27] ARM: davinci: dm365: " David Lechner
2018-05-09 17:25 ` [PATCH v10 09/27] ARM: davinci: dm644x: " David Lechner
2018-05-09 17:25 ` [PATCH v10 10/27] ARM: davinci: dm646x: " David Lechner
2018-05-09 17:25 ` [PATCH v10 11/27] ARM: davinci: da8xx: add new USB PHY " David Lechner
2018-05-09 17:25 ` [PATCH v10 12/27] ARM: davinci: da8xx: add new sata_refclk " David Lechner
2018-05-09 17:25 ` [PATCH v10 13/27] ARM: davinci: remove CONFIG_DAVINCI_RESET_CLOCKS David Lechner
2018-05-09 17:25 ` [PATCH v10 14/27] ARM: davinci_all_defconfig: " David Lechner
2018-05-09 17:25 ` [PATCH v10 15/27] ARM: davinci: switch to common clock framework David Lechner
2018-05-09 17:25 ` [PATCH v10 16/27] ARM: davinci: da830: Remove legacy clock init David Lechner
2018-05-09 17:25 ` [PATCH v10 17/27] ARM: davinci: da850: " David Lechner
2018-05-09 17:25 ` [PATCH v10 18/27] ARM: davinci: dm355: " David Lechner
2018-05-09 17:25 ` [PATCH v10 19/27] ARM: davinci: dm365: " David Lechner
2018-05-09 17:25 ` [PATCH v10 20/27] ARM: davinci: dm644x: " David Lechner
2018-05-09 17:26 ` [PATCH v10 21/27] ARM: davinci: dm646x: " David Lechner
2018-05-09 17:26 ` [PATCH v10 22/27] ARM: davinci: da8xx: Remove legacy USB and SATA " David Lechner
2018-05-09 17:26 ` [PATCH v10 23/27] ARM: davinci: remove legacy clocks David Lechner
2018-05-09 17:26 ` [PATCH v10 24/27] dt-bindings: timer: new bindings for TI DaVinci timer David Lechner
2018-05-18 14:24 ` Rob Herring
2018-05-09 17:26 ` [PATCH v10 25/27] ARM: davinci: add device tree support to timer David Lechner
2018-05-17 14:35 ` Sekhar Nori
2018-05-17 15:09 ` David Lechner
2018-05-18 6:05 ` Sekhar Nori
2018-05-18 15:35 ` David Lechner
2018-05-09 17:26 ` [PATCH v10 26/27] ARM: davinci: da8xx-dt: switch to device tree clocks David Lechner
2018-05-09 17:26 ` [PATCH v10 27/27] ARM: dts: da850: Add clocks David Lechner
2018-05-11 15:26 ` [PATCH v10 00/27] ARM: davinci: convert to common clock framework Sekhar Nori
2018-05-12 21:11 ` David Lechner
2018-05-14 0:40 ` Adam Ford
2018-05-14 1:50 ` David Lechner
2018-05-15 9:25 ` Bartosz Golaszewski
2018-05-15 22:44 ` Adam Ford
2018-05-16 0:31 ` David Lechner
2018-05-16 7:47 ` Bartosz Golaszewski
2018-05-16 10:43 ` Sekhar Nori
2018-05-17 0:46 ` Adam Ford
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