[PATCH v2 0/7] Enable CMT and TMU for DT

[PATCH v2 0/7] Enable CMT and TMU for DT

[Bastian Hecht]

This is the sequel to "[PATCH 0/3] Add OF support to CMT driver - bindings
discussion".

I moved to a general bindings definition for all timer devices and realized
it for CMT and TMU.

For MTU2 I unfortunately got no hardware and no datasheet, so the DT
implementation is postponed.
For TMU there is no DT version for the INTCS available, so this is untested. As
the code is so similar to the CMT driver, I decided to trust in the code
regardless.

In this version r8a7740 moves the CMT10 to DT too.

Based on Simon Hormans topic/all+next.
I can rebase patches 6 and 7 on topic/intc-of as well.

Cheers,

 Bastian

Bastian Hecht (7):
  ARM: shmobile: Define DT bindings for timer devices
  clocksource: sh_cmt: Add OF support
  clocksource: sh_tmu: Add OF support
  ARM: shmobile: sh73a0: Add timer DT names to clock list
  ARM: mach-shmobile: sh73a0: Setup the timer CMT10 using DT
  ARM: shmobile: r8a7740: Add DT name to clock list for CMT10
  ARM: mach-shmobile: r8a7740: Setup the timer CMT10 using DT

 .../devicetree/bindings/timer/renesas,timer.txt    |   45 ++++++++
 arch/arm/boot/dts/sh73a0.dtsi                      |   11 ++
 arch/arm/mach-shmobile/clock-r8a7740.c             |    1 +
 arch/arm/mach-shmobile/clock-sh73a0.c              |    3 +
 arch/arm/mach-shmobile/setup-r8a7740.c             |   33 ------
 arch/arm/mach-shmobile/setup-sh73a0.c              |   32 ------
 drivers/clocksource/sh_cmt.c                       |  109 +++++++++++++++++---
 drivers/clocksource/sh_tmu.c                       |   94 +++++++++++++++--
 8 files changed, 239 insertions(+), 89 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/timer/renesas,timer.txt

-- 
1.7.9.5

[PATCH v2 0/7] Enable CMT and TMU for DT

[Bastian Hecht]

This is the sequel to "[PATCH 0/3] Add OF support to CMT driver - bindings
discussion".

I moved to a general bindings definition for all timer devices and realized
it for CMT and TMU.

For MTU2 I unfortunately got no hardware and no datasheet, so the DT
implementation is postponed.
For TMU there is no DT version for the INTCS available, so this is untested. As
the code is so similar to the CMT driver, I decided to trust in the code
regardless.

In this version r8a7740 moves the CMT10 to DT too.

Based on Simon Hormans topic/all+next.
I can rebase patches 6 and 7 on topic/intc-of as well.

Cheers,

 Bastian

Bastian Hecht (7):
  ARM: shmobile: Define DT bindings for timer devices
  clocksource: sh_cmt: Add OF support
  clocksource: sh_tmu: Add OF support
  ARM: shmobile: sh73a0: Add timer DT names to clock list
  ARM: mach-shmobile: sh73a0: Setup the timer CMT10 using DT
  ARM: shmobile: r8a7740: Add DT name to clock list for CMT10
  ARM: mach-shmobile: r8a7740: Setup the timer CMT10 using DT

 .../devicetree/bindings/timer/renesas,timer.txt    |   45 ++++++++
 arch/arm/boot/dts/sh73a0.dtsi                      |   11 ++
 arch/arm/mach-shmobile/clock-r8a7740.c             |    1 +
 arch/arm/mach-shmobile/clock-sh73a0.c              |    3 +
 arch/arm/mach-shmobile/setup-r8a7740.c             |   33 ------
 arch/arm/mach-shmobile/setup-sh73a0.c              |   32 ------
 drivers/clocksource/sh_cmt.c                       |  109 +++++++++++++++++---
 drivers/clocksource/sh_tmu.c                       |   94 +++++++++++++++--
 8 files changed, 239 insertions(+), 89 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/timer/renesas,timer.txt

-- 
1.7.9.5

[PATCH v2 1/7] ARM: shmobile: Define DT bindings for timer devices

[Bastian Hecht]

The SH mobile series currently features 3 timer devices in the kernel:
Compare Match Timer (CMT), Timer Unit (TMU) and MTU2. These devices
share register layout characteristics amongst each that enable us to
define common DT bindings for them.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2:
- Split the bindings into an extra patch
- Renamed the linux specific clocksource-rating and added an explanation why
  it is in the bindings
- Using the postfix -timer in the compatible string
 .../devicetree/bindings/timer/renesas,timer.txt    |   45 ++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/renesas,timer.txt

diff --git a/Documentation/devicetree/bindings/timer/renesas,timer.txt b/Documentation/devicetree/bindings/timer/renesas,timer.txt
new file mode 100644
index 0000000..2c001bf
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/renesas,timer.txt
@@ -0,0 +1,45 @@
+* Renesas SH Mobile Timer
+
+Bindings for several timer devices from Renesas including CMT, TMU and MTU2.
+
+Required properties:
+- compatible : Should be "renesas,{device}-timer",
+  whereas device is "cmt", "tmu" or "mtu2".
+- reg : Address and length of the register set for the device
+- interrupts : Timer interrupt
+- renesas,device-id : The ID of the timer device
+- renesas,channel-id : The channel ID of the timer device
+- renesas,source-quality : The viability to use this device as a free
+  running clock. From 0 (do not use) to 10 (best possible clock).
+- renesas,event-quality : The viability to use this device as an event
+  generator. From 0 (do not use) to 10 (best possible clock).
+
+The properties renesas,{source,event}-quality reflect the situation that the
+usability of the timer devices depend on the location within their SoCs. E.g.
+the power domain affinty affects power management, some mux-ed lines might be
+preferred to be assigned to other functions and other constraints.
+
+Example for CMT1 channel 0 on the R8A7740 SoC:
+
+	timer@e6138010 {
+		compatible = "renesas,cmt-timer";
+		interrupt-parent = <&intca>;
+		reg = <0xe6138010 0xc>;
+		interrupts = <0x0b00>;
+		renesas,device-id = <1>;
+		renesas,channel-id = <0>;
+		renesas,source-quality = <3>;
+		renesas,event-quality = <3>;
+	};
+
+Example for TMU0 channel 1 on the SH7372 SoC:
+	timer@fff60014 {
+		compatible = "renesas,tmu-timer";
+		interrupt-parent = <&intcs>;
+		reg = <0xfff60014 0xc>;
+		interrupts = <0xea0>;
+		renesas,device-id = <0>;
+		renesas,channel-id = <1>;
+		renesas,source-quality = <4>;
+		renesas,event-quality = <0>;
+	};
-- 
1.7.9.5

[PATCH v2 1/7] ARM: shmobile: Define DT bindings for timer devices

[Bastian Hecht]

The SH mobile series currently features 3 timer devices in the kernel:
Compare Match Timer (CMT), Timer Unit (TMU) and MTU2. These devices
share register layout characteristics amongst each that enable us to
define common DT bindings for them.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2:
- Split the bindings into an extra patch
- Renamed the linux specific clocksource-rating and added an explanation why
  it is in the bindings
- Using the postfix -timer in the compatible string
 .../devicetree/bindings/timer/renesas,timer.txt    |   45 ++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/renesas,timer.txt

diff --git a/Documentation/devicetree/bindings/timer/renesas,timer.txt b/Documentation/devicetree/bindings/timer/renesas,timer.txt
new file mode 100644
index 0000000..2c001bf
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/renesas,timer.txt
@@ -0,0 +1,45 @@
+* Renesas SH Mobile Timer
+
+Bindings for several timer devices from Renesas including CMT, TMU and MTU2.
+
+Required properties:
+- compatible : Should be "renesas,{device}-timer",
+  whereas device is "cmt", "tmu" or "mtu2".
+- reg : Address and length of the register set for the device
+- interrupts : Timer interrupt
+- renesas,device-id : The ID of the timer device
+- renesas,channel-id : The channel ID of the timer device
+- renesas,source-quality : The viability to use this device as a free
+  running clock. From 0 (do not use) to 10 (best possible clock).
+- renesas,event-quality : The viability to use this device as an event
+  generator. From 0 (do not use) to 10 (best possible clock).
+
+The properties renesas,{source,event}-quality reflect the situation that the
+usability of the timer devices depend on the location within their SoCs. E.g.
+the power domain affinty affects power management, some mux-ed lines might be
+preferred to be assigned to other functions and other constraints.
+
+Example for CMT1 channel 0 on the R8A7740 SoC:
+
+	timer at e6138010 {
+		compatible = "renesas,cmt-timer";
+		interrupt-parent = <&intca>;
+		reg = <0xe6138010 0xc>;
+		interrupts = <0x0b00>;
+		renesas,device-id = <1>;
+		renesas,channel-id = <0>;
+		renesas,source-quality = <3>;
+		renesas,event-quality = <3>;
+	};
+
+Example for TMU0 channel 1 on the SH7372 SoC:
+	timer at fff60014 {
+		compatible = "renesas,tmu-timer";
+		interrupt-parent = <&intcs>;
+		reg = <0xfff60014 0xc>;
+		interrupts = <0xea0>;
+		renesas,device-id = <0>;
+		renesas,channel-id = <1>;
+		renesas,source-quality = <4>;
+		renesas,event-quality = <0>;
+	};
-- 
1.7.9.5

[PATCH v2 2/7] clocksource: sh_cmt: Add OF support

[Bastian Hecht]

We add the capabilty to probe SH CMT timer devices using Device Tree
setup.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2:
- Switched to of_property_read_u32()
- Checking range for channel-id

 drivers/clocksource/sh_cmt.c |  109 +++++++++++++++++++++++++++++++++++++-----
 1 file changed, 96 insertions(+), 13 deletions(-)

diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
index 08d0c41..79bc526 100644
--- a/drivers/clocksource/sh_cmt.c
+++ b/drivers/clocksource/sh_cmt.c
@@ -34,10 +34,13 @@
 #include <linux/module.h>
 #include <linux/pm_domain.h>
 #include <linux/pm_runtime.h>
+#include <linux/of.h>
 
 struct sh_cmt_priv {
 	void __iomem *mapbase;
 	struct clk *clk;
+	long channel_offset;
+	int timer_bit;
 	unsigned long width; /* 16 or 32 bit version of hardware block */
 	unsigned long overflow_bit;
 	unsigned long clear_bits;
@@ -109,9 +112,7 @@ static void sh_cmt_write32(void __iomem *base, unsigned long offs,
 
 static inline unsigned long sh_cmt_read_cmstr(struct sh_cmt_priv *p)
 {
-	struct sh_timer_config *cfg = p->pdev->dev.platform_data;
-
-	return p->read_control(p->mapbase - cfg->channel_offset, 0);
+	return p->read_control(p->mapbase - p->channel_offset, 0);
 }
 
 static inline unsigned long sh_cmt_read_cmcsr(struct sh_cmt_priv *p)
@@ -127,9 +128,7 @@ static inline unsigned long sh_cmt_read_cmcnt(struct sh_cmt_priv *p)
 static inline void sh_cmt_write_cmstr(struct sh_cmt_priv *p,
 				      unsigned long value)
 {
-	struct sh_timer_config *cfg = p->pdev->dev.platform_data;
-
-	p->write_control(p->mapbase - cfg->channel_offset, 0, value);
+	p->write_control(p->mapbase - p->channel_offset, 0, value);
 }
 
 static inline void sh_cmt_write_cmcsr(struct sh_cmt_priv *p,
@@ -176,7 +175,6 @@ static DEFINE_RAW_SPINLOCK(sh_cmt_lock);
 
 static void sh_cmt_start_stop_ch(struct sh_cmt_priv *p, int start)
 {
-	struct sh_timer_config *cfg = p->pdev->dev.platform_data;
 	unsigned long flags, value;
 
 	/* start stop register shared by multiple timer channels */
@@ -184,9 +182,9 @@ static void sh_cmt_start_stop_ch(struct sh_cmt_priv *p, int start)
 	value = sh_cmt_read_cmstr(p);
 
 	if (start)
-		value |= 1 << cfg->timer_bit;
+		value |= 1 << p->timer_bit;
 	else
-		value &= ~(1 << cfg->timer_bit);
+		value &= ~(1 << p->timer_bit);
 
 	sh_cmt_write_cmstr(p, value);
 	raw_spin_unlock_irqrestore(&sh_cmt_lock, flags);
@@ -673,9 +671,85 @@ static int sh_cmt_register(struct sh_cmt_priv *p, char *name,
 	return 0;
 }
 
-static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev)
+static const struct of_device_id of_sh_cmt_match[] = {
+	{ .compatible = "renesas,cmt-timer" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_sh_cmt_match);
+
+static const int sh_cmt_offset_multiplier[] = { 0x60, 0x10, 0x40, 0x40, 0x40 };
+#define CMT_MAX_CHANNELS	6
+
+static struct sh_timer_config *sh_cmt_parse_dt(struct device *dev)
+{
+	struct sh_timer_config *cfg;
+	struct device_node *np = dev->of_node;
+	u32 timer_id, channel_id, rating;
+
+	if (!IS_ENABLED(CONFIG_OF) || !np)
+		return NULL;
+
+	cfg = devm_kzalloc(dev, sizeof(struct sh_timer_config), GFP_KERNEL);
+	if (!cfg) {
+		dev_err(dev, "failed to allocate DT config data\n");
+		return NULL;
+	}
+
+	if (of_property_read_u32(np, "renesas,device-id", &timer_id)) {
+		dev_err(dev, "device id missing\n");
+		return NULL;
+	}
+	if (timer_id >= ARRAY_SIZE(sh_cmt_offset_multiplier)) {
+		dev_err(dev, "invalid device id\n");
+		return NULL;
+	}
+
+	if (of_property_read_u32(np, "renesas,channel-id", &channel_id)) {
+		dev_err(dev, "channel id missing\n");
+		return NULL;
+	}
+	if (channel_id >= CMT_MAX_CHANNELS) {
+		dev_err(dev, "invalid channel id\n");
+		return NULL;
+	}
+
+	cfg->channel_offset = sh_cmt_offset_multiplier[timer_id] *
+							(channel_id + 1);
+	cfg->timer_bit = channel_id;
+
+	/*
+	 * We convert the {source,event}-quality DT properties to linux specific
+	 * clock{source,event}_ratings.
+	 */
+	if (!of_property_read_u32(np, "renesas,source-quality", &rating)) {
+		if (rating > 10) {
+			dev_err(dev, "invalid source-quality\n");
+			return NULL;
+		}
+		if (rating)
+			cfg->clocksource_rating = rating * 50 - 1;
+	}
+
+	if (!of_property_read_u32(np, "renesas,event-quality", &rating)) {
+		if (rating > 10) {
+			dev_err(dev, "invalid event-quality\n");
+			return NULL;
+		}
+		if (rating)
+			cfg->clockevent_rating = rating * 50 - 1;
+	}
+
+	if (!cfg->clocksource_rating && !cfg->clockevent_rating) {
+		dev_err(dev, "source- and event-quality 0, timer is unused\n");
+		return NULL;
+	}
+
+	return cfg;
+}
+
+static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev,
+						struct sh_timer_config *cfg)
 {
-	struct sh_timer_config *cfg = pdev->dev.platform_data;
 	struct resource *res;
 	int irq, ret;
 	ret = -ENXIO;
@@ -762,6 +836,9 @@ static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev)
 		goto err2;
 	}
 
+	p->channel_offset = cfg->channel_offset;
+	p->timer_bit = cfg->timer_bit;
+
 	platform_set_drvdata(pdev, p);
 
 	return 0;
@@ -777,7 +854,7 @@ err0:
 static int sh_cmt_probe(struct platform_device *pdev)
 {
 	struct sh_cmt_priv *p = platform_get_drvdata(pdev);
-	struct sh_timer_config *cfg = pdev->dev.platform_data;
+	struct sh_timer_config *cfg;
 	int ret;
 
 	if (!is_early_platform_device(pdev)) {
@@ -785,6 +862,11 @@ static int sh_cmt_probe(struct platform_device *pdev)
 		pm_runtime_enable(&pdev->dev);
 	}
 
+	if (pdev->dev.of_node)
+		cfg = sh_cmt_parse_dt(&pdev->dev);
+	else
+		cfg = pdev->dev.platform_data;
+
 	if (p) {
 		dev_info(&pdev->dev, "kept as earlytimer\n");
 		goto out;
@@ -796,7 +878,7 @@ static int sh_cmt_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	ret = sh_cmt_setup(p, pdev);
+	ret = sh_cmt_setup(p, pdev, cfg);
 	if (ret) {
 		kfree(p);
 		pm_runtime_idle(&pdev->dev);
@@ -824,6 +906,7 @@ static struct platform_driver sh_cmt_device_driver = {
 	.remove		= sh_cmt_remove,
 	.driver		= {
 		.name	= "sh_cmt",
+		.of_match_table = of_match_ptr(of_sh_cmt_match),
 	}
 };
 
-- 
1.7.9.5

[PATCH v2 2/7] clocksource: sh_cmt: Add OF support

[Bastian Hecht]

We add the capabilty to probe SH CMT timer devices using Device Tree
setup.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2:
- Switched to of_property_read_u32()
- Checking range for channel-id

 drivers/clocksource/sh_cmt.c |  109 +++++++++++++++++++++++++++++++++++++-----
 1 file changed, 96 insertions(+), 13 deletions(-)

diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
index 08d0c41..79bc526 100644
--- a/drivers/clocksource/sh_cmt.c
+++ b/drivers/clocksource/sh_cmt.c
@@ -34,10 +34,13 @@
 #include <linux/module.h>
 #include <linux/pm_domain.h>
 #include <linux/pm_runtime.h>
+#include <linux/of.h>
 
 struct sh_cmt_priv {
 	void __iomem *mapbase;
 	struct clk *clk;
+	long channel_offset;
+	int timer_bit;
 	unsigned long width; /* 16 or 32 bit version of hardware block */
 	unsigned long overflow_bit;
 	unsigned long clear_bits;
@@ -109,9 +112,7 @@ static void sh_cmt_write32(void __iomem *base, unsigned long offs,
 
 static inline unsigned long sh_cmt_read_cmstr(struct sh_cmt_priv *p)
 {
-	struct sh_timer_config *cfg = p->pdev->dev.platform_data;
-
-	return p->read_control(p->mapbase - cfg->channel_offset, 0);
+	return p->read_control(p->mapbase - p->channel_offset, 0);
 }
 
 static inline unsigned long sh_cmt_read_cmcsr(struct sh_cmt_priv *p)
@@ -127,9 +128,7 @@ static inline unsigned long sh_cmt_read_cmcnt(struct sh_cmt_priv *p)
 static inline void sh_cmt_write_cmstr(struct sh_cmt_priv *p,
 				      unsigned long value)
 {
-	struct sh_timer_config *cfg = p->pdev->dev.platform_data;
-
-	p->write_control(p->mapbase - cfg->channel_offset, 0, value);
+	p->write_control(p->mapbase - p->channel_offset, 0, value);
 }
 
 static inline void sh_cmt_write_cmcsr(struct sh_cmt_priv *p,
@@ -176,7 +175,6 @@ static DEFINE_RAW_SPINLOCK(sh_cmt_lock);
 
 static void sh_cmt_start_stop_ch(struct sh_cmt_priv *p, int start)
 {
-	struct sh_timer_config *cfg = p->pdev->dev.platform_data;
 	unsigned long flags, value;
 
 	/* start stop register shared by multiple timer channels */
@@ -184,9 +182,9 @@ static void sh_cmt_start_stop_ch(struct sh_cmt_priv *p, int start)
 	value = sh_cmt_read_cmstr(p);
 
 	if (start)
-		value |= 1 << cfg->timer_bit;
+		value |= 1 << p->timer_bit;
 	else
-		value &= ~(1 << cfg->timer_bit);
+		value &= ~(1 << p->timer_bit);
 
 	sh_cmt_write_cmstr(p, value);
 	raw_spin_unlock_irqrestore(&sh_cmt_lock, flags);
@@ -673,9 +671,85 @@ static int sh_cmt_register(struct sh_cmt_priv *p, char *name,
 	return 0;
 }
 
-static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev)
+static const struct of_device_id of_sh_cmt_match[] = {
+	{ .compatible = "renesas,cmt-timer" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_sh_cmt_match);
+
+static const int sh_cmt_offset_multiplier[] = { 0x60, 0x10, 0x40, 0x40, 0x40 };
+#define CMT_MAX_CHANNELS	6
+
+static struct sh_timer_config *sh_cmt_parse_dt(struct device *dev)
+{
+	struct sh_timer_config *cfg;
+	struct device_node *np = dev->of_node;
+	u32 timer_id, channel_id, rating;
+
+	if (!IS_ENABLED(CONFIG_OF) || !np)
+		return NULL;
+
+	cfg = devm_kzalloc(dev, sizeof(struct sh_timer_config), GFP_KERNEL);
+	if (!cfg) {
+		dev_err(dev, "failed to allocate DT config data\n");
+		return NULL;
+	}
+
+	if (of_property_read_u32(np, "renesas,device-id", &timer_id)) {
+		dev_err(dev, "device id missing\n");
+		return NULL;
+	}
+	if (timer_id >= ARRAY_SIZE(sh_cmt_offset_multiplier)) {
+		dev_err(dev, "invalid device id\n");
+		return NULL;
+	}
+
+	if (of_property_read_u32(np, "renesas,channel-id", &channel_id)) {
+		dev_err(dev, "channel id missing\n");
+		return NULL;
+	}
+	if (channel_id >= CMT_MAX_CHANNELS) {
+		dev_err(dev, "invalid channel id\n");
+		return NULL;
+	}
+
+	cfg->channel_offset = sh_cmt_offset_multiplier[timer_id] *
+							(channel_id + 1);
+	cfg->timer_bit = channel_id;
+
+	/*
+	 * We convert the {source,event}-quality DT properties to linux specific
+	 * clock{source,event}_ratings.
+	 */
+	if (!of_property_read_u32(np, "renesas,source-quality", &rating)) {
+		if (rating > 10) {
+			dev_err(dev, "invalid source-quality\n");
+			return NULL;
+		}
+		if (rating)
+			cfg->clocksource_rating = rating * 50 - 1;
+	}
+
+	if (!of_property_read_u32(np, "renesas,event-quality", &rating)) {
+		if (rating > 10) {
+			dev_err(dev, "invalid event-quality\n");
+			return NULL;
+		}
+		if (rating)
+			cfg->clockevent_rating = rating * 50 - 1;
+	}
+
+	if (!cfg->clocksource_rating && !cfg->clockevent_rating) {
+		dev_err(dev, "source- and event-quality 0, timer is unused\n");
+		return NULL;
+	}
+
+	return cfg;
+}
+
+static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev,
+						struct sh_timer_config *cfg)
 {
-	struct sh_timer_config *cfg = pdev->dev.platform_data;
 	struct resource *res;
 	int irq, ret;
 	ret = -ENXIO;
@@ -762,6 +836,9 @@ static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev)
 		goto err2;
 	}
 
+	p->channel_offset = cfg->channel_offset;
+	p->timer_bit = cfg->timer_bit;
+
 	platform_set_drvdata(pdev, p);
 
 	return 0;
@@ -777,7 +854,7 @@ err0:
 static int sh_cmt_probe(struct platform_device *pdev)
 {
 	struct sh_cmt_priv *p = platform_get_drvdata(pdev);
-	struct sh_timer_config *cfg = pdev->dev.platform_data;
+	struct sh_timer_config *cfg;
 	int ret;
 
 	if (!is_early_platform_device(pdev)) {
@@ -785,6 +862,11 @@ static int sh_cmt_probe(struct platform_device *pdev)
 		pm_runtime_enable(&pdev->dev);
 	}
 
+	if (pdev->dev.of_node)
+		cfg = sh_cmt_parse_dt(&pdev->dev);
+	else
+		cfg = pdev->dev.platform_data;
+
 	if (p) {
 		dev_info(&pdev->dev, "kept as earlytimer\n");
 		goto out;
@@ -796,7 +878,7 @@ static int sh_cmt_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	ret = sh_cmt_setup(p, pdev);
+	ret = sh_cmt_setup(p, pdev, cfg);
 	if (ret) {
 		kfree(p);
 		pm_runtime_idle(&pdev->dev);
@@ -824,6 +906,7 @@ static struct platform_driver sh_cmt_device_driver = {
 	.remove		= sh_cmt_remove,
 	.driver		= {
 		.name	= "sh_cmt",
+		.of_match_table = of_match_ptr(of_sh_cmt_match),
 	}
 };
 
-- 
1.7.9.5

[PATCH v2 3/7] clocksource: sh_tmu: Add OF support

[Bastian Hecht]

We add the capabilty to probe SH CMT timer devices using Device Tree
setup.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2: new. Done analogously to the cmt driver

 drivers/clocksource/sh_tmu.c |   94 +++++++++++++++++++++++++++++++++++++-----
 1 file changed, 83 insertions(+), 11 deletions(-)

diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
index b4502edc..7d5c999 100644
--- a/drivers/clocksource/sh_tmu.c
+++ b/drivers/clocksource/sh_tmu.c
@@ -34,10 +34,13 @@
 #include <linux/module.h>
 #include <linux/pm_domain.h>
 #include <linux/pm_runtime.h>
+#include <linux/of.h>
 
 struct sh_tmu_priv {
 	void __iomem *mapbase;
 	struct clk *clk;
+	long channel_offset;
+	int timer_bit;
 	struct irqaction irqaction;
 	struct platform_device *pdev;
 	unsigned long rate;
@@ -57,12 +60,11 @@ static DEFINE_RAW_SPINLOCK(sh_tmu_lock);
 
 static inline unsigned long sh_tmu_read(struct sh_tmu_priv *p, int reg_nr)
 {
-	struct sh_timer_config *cfg = p->pdev->dev.platform_data;
 	void __iomem *base = p->mapbase;
 	unsigned long offs;
 
 	if (reg_nr = TSTR)
-		return ioread8(base - cfg->channel_offset);
+		return ioread8(base - p->channel_offset);
 
 	offs = reg_nr << 2;
 
@@ -75,12 +77,11 @@ static inline unsigned long sh_tmu_read(struct sh_tmu_priv *p, int reg_nr)
 static inline void sh_tmu_write(struct sh_tmu_priv *p, int reg_nr,
 				unsigned long value)
 {
-	struct sh_timer_config *cfg = p->pdev->dev.platform_data;
 	void __iomem *base = p->mapbase;
 	unsigned long offs;
 
 	if (reg_nr = TSTR) {
-		iowrite8(value, base - cfg->channel_offset);
+		iowrite8(value, base - p->channel_offset);
 		return;
 	}
 
@@ -94,7 +95,6 @@ static inline void sh_tmu_write(struct sh_tmu_priv *p, int reg_nr,
 
 static void sh_tmu_start_stop_ch(struct sh_tmu_priv *p, int start)
 {
-	struct sh_timer_config *cfg = p->pdev->dev.platform_data;
 	unsigned long flags, value;
 
 	/* start stop register shared by multiple timer channels */
@@ -102,9 +102,9 @@ static void sh_tmu_start_stop_ch(struct sh_tmu_priv *p, int start)
 	value = sh_tmu_read(p, TSTR);
 
 	if (start)
-		value |= 1 << cfg->timer_bit;
+		value |= 1 << p->timer_bit;
 	else
-		value &= ~(1 << cfg->timer_bit);
+		value &= ~(1 << p->timer_bit);
 
 	sh_tmu_write(p, TSTR, value);
 	raw_spin_unlock_irqrestore(&sh_tmu_lock, flags);
@@ -421,9 +421,75 @@ static int sh_tmu_register(struct sh_tmu_priv *p, char *name,
 	return 0;
 }
 
-static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev)
+static const struct of_device_id of_sh_tmu_match[] = {
+	{ .compatible = "renesas,tmu-timer" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_sh_tmu_match);
+
+#define TMU_OFFSET_MULTIPLIER	0xc
+#define TMU_MAX_CHANNELS	3
+
+static struct sh_timer_config *sh_tmu_parse_dt(struct device *dev)
+{
+	struct sh_timer_config *cfg;
+	struct device_node *np = dev->of_node;
+	u32 channel_id, rating;
+
+	if (!IS_ENABLED(CONFIG_OF) || !np)
+		return NULL;
+
+	cfg = devm_kzalloc(dev, sizeof(struct sh_timer_config), GFP_KERNEL);
+	if (!cfg) {
+		dev_err(dev, "failed to allocate DT config data\n");
+		return NULL;
+	}
+
+	if (of_property_read_u32(np, "renesas,channel-id", &channel_id)) {
+		dev_err(dev, "channel id missing\n");
+		return NULL;
+	}
+	if (channel_id >= TMU_MAX_CHANNELS) {
+		dev_err(dev, "invalid channel id\n");
+		return NULL;
+	}
+
+	cfg->channel_offset = channel_id * TMU_OFFSET_MULTIPLIER + 4;
+	cfg->timer_bit = channel_id;
+
+	/*
+	 * We convert the {source,event}-quality DT properties to linux specific
+	 * clock{source,event}_ratings.
+	 */
+	if (!of_property_read_u32(np, "renesas,source-quality", &rating)) {
+		if (rating > 10) {
+			dev_err(dev, "invalid source-quality\n");
+			return NULL;
+		}
+		if (rating)
+			cfg->clocksource_rating = rating * 50 - 1;
+	}
+
+	if (!of_property_read_u32(np, "renesas,event-quality", &rating)) {
+		if (rating > 10) {
+			dev_err(dev, "invalid event-quality\n");
+			return NULL;
+		}
+		if (rating)
+			cfg->clockevent_rating = rating * 50 - 1;
+	}
+
+	if (!cfg->clocksource_rating && !cfg->clockevent_rating) {
+		dev_err(dev, "source- and event-quality 0, timer is unused\n");
+		return NULL;
+	}
+
+	return cfg;
+}
+
+static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev,
+						struct sh_timer_config *cfg)
 {
-	struct sh_timer_config *cfg = pdev->dev.platform_data;
 	struct resource *res;
 	int irq, ret;
 	ret = -ENXIO;
@@ -487,7 +553,7 @@ static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev)
 static int sh_tmu_probe(struct platform_device *pdev)
 {
 	struct sh_tmu_priv *p = platform_get_drvdata(pdev);
-	struct sh_timer_config *cfg = pdev->dev.platform_data;
+	struct sh_timer_config *cfg;
 	int ret;
 
 	if (!is_early_platform_device(pdev)) {
@@ -495,6 +561,11 @@ static int sh_tmu_probe(struct platform_device *pdev)
 		pm_runtime_enable(&pdev->dev);
 	}
 
+	if (pdev->dev.of_node)
+		cfg = sh_tmu_parse_dt(&pdev->dev);
+	else
+		cfg = pdev->dev.platform_data;
+
 	if (p) {
 		dev_info(&pdev->dev, "kept as earlytimer\n");
 		goto out;
@@ -506,7 +577,7 @@ static int sh_tmu_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	ret = sh_tmu_setup(p, pdev);
+	ret = sh_tmu_setup(p, pdev, cfg);
 	if (ret) {
 		kfree(p);
 		platform_set_drvdata(pdev, NULL);
@@ -535,6 +606,7 @@ static struct platform_driver sh_tmu_device_driver = {
 	.remove		= sh_tmu_remove,
 	.driver		= {
 		.name	= "sh_tmu",
+		.of_match_table = of_sh_tmu_match,
 	}
 };
 
-- 
1.7.9.5

[PATCH v2 3/7] clocksource: sh_tmu: Add OF support

[Bastian Hecht]

We add the capabilty to probe SH CMT timer devices using Device Tree
setup.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2: new. Done analogously to the cmt driver

 drivers/clocksource/sh_tmu.c |   94 +++++++++++++++++++++++++++++++++++++-----
 1 file changed, 83 insertions(+), 11 deletions(-)

diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
index b4502edc..7d5c999 100644
--- a/drivers/clocksource/sh_tmu.c
+++ b/drivers/clocksource/sh_tmu.c
@@ -34,10 +34,13 @@
 #include <linux/module.h>
 #include <linux/pm_domain.h>
 #include <linux/pm_runtime.h>
+#include <linux/of.h>
 
 struct sh_tmu_priv {
 	void __iomem *mapbase;
 	struct clk *clk;
+	long channel_offset;
+	int timer_bit;
 	struct irqaction irqaction;
 	struct platform_device *pdev;
 	unsigned long rate;
@@ -57,12 +60,11 @@ static DEFINE_RAW_SPINLOCK(sh_tmu_lock);
 
 static inline unsigned long sh_tmu_read(struct sh_tmu_priv *p, int reg_nr)
 {
-	struct sh_timer_config *cfg = p->pdev->dev.platform_data;
 	void __iomem *base = p->mapbase;
 	unsigned long offs;
 
 	if (reg_nr == TSTR)
-		return ioread8(base - cfg->channel_offset);
+		return ioread8(base - p->channel_offset);
 
 	offs = reg_nr << 2;
 
@@ -75,12 +77,11 @@ static inline unsigned long sh_tmu_read(struct sh_tmu_priv *p, int reg_nr)
 static inline void sh_tmu_write(struct sh_tmu_priv *p, int reg_nr,
 				unsigned long value)
 {
-	struct sh_timer_config *cfg = p->pdev->dev.platform_data;
 	void __iomem *base = p->mapbase;
 	unsigned long offs;
 
 	if (reg_nr == TSTR) {
-		iowrite8(value, base - cfg->channel_offset);
+		iowrite8(value, base - p->channel_offset);
 		return;
 	}
 
@@ -94,7 +95,6 @@ static inline void sh_tmu_write(struct sh_tmu_priv *p, int reg_nr,
 
 static void sh_tmu_start_stop_ch(struct sh_tmu_priv *p, int start)
 {
-	struct sh_timer_config *cfg = p->pdev->dev.platform_data;
 	unsigned long flags, value;
 
 	/* start stop register shared by multiple timer channels */
@@ -102,9 +102,9 @@ static void sh_tmu_start_stop_ch(struct sh_tmu_priv *p, int start)
 	value = sh_tmu_read(p, TSTR);
 
 	if (start)
-		value |= 1 << cfg->timer_bit;
+		value |= 1 << p->timer_bit;
 	else
-		value &= ~(1 << cfg->timer_bit);
+		value &= ~(1 << p->timer_bit);
 
 	sh_tmu_write(p, TSTR, value);
 	raw_spin_unlock_irqrestore(&sh_tmu_lock, flags);
@@ -421,9 +421,75 @@ static int sh_tmu_register(struct sh_tmu_priv *p, char *name,
 	return 0;
 }
 
-static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev)
+static const struct of_device_id of_sh_tmu_match[] = {
+	{ .compatible = "renesas,tmu-timer" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_sh_tmu_match);
+
+#define TMU_OFFSET_MULTIPLIER	0xc
+#define TMU_MAX_CHANNELS	3
+
+static struct sh_timer_config *sh_tmu_parse_dt(struct device *dev)
+{
+	struct sh_timer_config *cfg;
+	struct device_node *np = dev->of_node;
+	u32 channel_id, rating;
+
+	if (!IS_ENABLED(CONFIG_OF) || !np)
+		return NULL;
+
+	cfg = devm_kzalloc(dev, sizeof(struct sh_timer_config), GFP_KERNEL);
+	if (!cfg) {
+		dev_err(dev, "failed to allocate DT config data\n");
+		return NULL;
+	}
+
+	if (of_property_read_u32(np, "renesas,channel-id", &channel_id)) {
+		dev_err(dev, "channel id missing\n");
+		return NULL;
+	}
+	if (channel_id >= TMU_MAX_CHANNELS) {
+		dev_err(dev, "invalid channel id\n");
+		return NULL;
+	}
+
+	cfg->channel_offset = channel_id * TMU_OFFSET_MULTIPLIER + 4;
+	cfg->timer_bit = channel_id;
+
+	/*
+	 * We convert the {source,event}-quality DT properties to linux specific
+	 * clock{source,event}_ratings.
+	 */
+	if (!of_property_read_u32(np, "renesas,source-quality", &rating)) {
+		if (rating > 10) {
+			dev_err(dev, "invalid source-quality\n");
+			return NULL;
+		}
+		if (rating)
+			cfg->clocksource_rating = rating * 50 - 1;
+	}
+
+	if (!of_property_read_u32(np, "renesas,event-quality", &rating)) {
+		if (rating > 10) {
+			dev_err(dev, "invalid event-quality\n");
+			return NULL;
+		}
+		if (rating)
+			cfg->clockevent_rating = rating * 50 - 1;
+	}
+
+	if (!cfg->clocksource_rating && !cfg->clockevent_rating) {
+		dev_err(dev, "source- and event-quality 0, timer is unused\n");
+		return NULL;
+	}
+
+	return cfg;
+}
+
+static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev,
+						struct sh_timer_config *cfg)
 {
-	struct sh_timer_config *cfg = pdev->dev.platform_data;
 	struct resource *res;
 	int irq, ret;
 	ret = -ENXIO;
@@ -487,7 +553,7 @@ static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev)
 static int sh_tmu_probe(struct platform_device *pdev)
 {
 	struct sh_tmu_priv *p = platform_get_drvdata(pdev);
-	struct sh_timer_config *cfg = pdev->dev.platform_data;
+	struct sh_timer_config *cfg;
 	int ret;
 
 	if (!is_early_platform_device(pdev)) {
@@ -495,6 +561,11 @@ static int sh_tmu_probe(struct platform_device *pdev)
 		pm_runtime_enable(&pdev->dev);
 	}
 
+	if (pdev->dev.of_node)
+		cfg = sh_tmu_parse_dt(&pdev->dev);
+	else
+		cfg = pdev->dev.platform_data;
+
 	if (p) {
 		dev_info(&pdev->dev, "kept as earlytimer\n");
 		goto out;
@@ -506,7 +577,7 @@ static int sh_tmu_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	ret = sh_tmu_setup(p, pdev);
+	ret = sh_tmu_setup(p, pdev, cfg);
 	if (ret) {
 		kfree(p);
 		platform_set_drvdata(pdev, NULL);
@@ -535,6 +606,7 @@ static struct platform_driver sh_tmu_device_driver = {
 	.remove		= sh_tmu_remove,
 	.driver		= {
 		.name	= "sh_tmu",
+		.of_match_table = of_sh_tmu_match,
 	}
 };
 
-- 
1.7.9.5

[PATCH v2 4/7] ARM: shmobile: sh73a0: Add timer DT names to clock list

[Bastian Hecht]

This adds temporarily the alternative device names to the clock list
that are used when booting via Device Tree setup.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2:
- Done for cmt and tmu

 arch/arm/mach-shmobile/clock-sh73a0.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/mach-shmobile/clock-sh73a0.c b/arch/arm/mach-shmobile/clock-sh73a0.c
index 71843dd..2704467 100644
--- a/arch/arm/mach-shmobile/clock-sh73a0.c
+++ b/arch/arm/mach-shmobile/clock-sh73a0.c
@@ -558,7 +558,9 @@ static struct clk_lookup lookups[] = {
 	CLKDEV_DEV_ID("sh_mobile_ceu.0", &mstp_clks[MSTP127]), /* CEU0 */
 	CLKDEV_DEV_ID("sh-mobile-csi2.0", &mstp_clks[MSTP126]), /* CSI2-RX0 */
 	CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP125]), /* TMU00 */
+	CLKDEV_DEV_ID("fff60008.timer", &mstp_clks[MSTP125]), /* TMU00 */
 	CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP125]), /* TMU01 */
+	CLKDEV_DEV_ID("fff60014.timer", &mstp_clks[MSTP125]), /* TMU01 */
 	CLKDEV_DEV_ID("sh-mipi-dsi.0", &mstp_clks[MSTP118]), /* DSITX */
 	CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[MSTP116]), /* I2C0 */
 	CLKDEV_DEV_ID("e6820000.i2c", &mstp_clks[MSTP116]), /* I2C0 */
@@ -575,6 +577,7 @@ static struct clk_lookup lookups[] = {
 	CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP200]), /* SCIFA4 */
 	CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[MSTP331]), /* SCIFA6 */
 	CLKDEV_DEV_ID("sh_cmt.10", &mstp_clks[MSTP329]), /* CMT10 */
+	CLKDEV_DEV_ID("e6138010.timer", &mstp_clks[MSTP329]), /* CMT10 */
 	CLKDEV_DEV_ID("sh_fsi2", &mstp_clks[MSTP328]), /* FSI */
 	CLKDEV_DEV_ID("sh_irda.0", &mstp_clks[MSTP325]), /* IrDA */
 	CLKDEV_DEV_ID("i2c-sh_mobile.1", &mstp_clks[MSTP323]), /* I2C1 */
-- 
1.7.9.5

[PATCH v2 4/7] ARM: shmobile: sh73a0: Add timer DT names to clock list

[Bastian Hecht]

This adds temporarily the alternative device names to the clock list
that are used when booting via Device Tree setup.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2:
- Done for cmt and tmu

 arch/arm/mach-shmobile/clock-sh73a0.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/mach-shmobile/clock-sh73a0.c b/arch/arm/mach-shmobile/clock-sh73a0.c
index 71843dd..2704467 100644
--- a/arch/arm/mach-shmobile/clock-sh73a0.c
+++ b/arch/arm/mach-shmobile/clock-sh73a0.c
@@ -558,7 +558,9 @@ static struct clk_lookup lookups[] = {
 	CLKDEV_DEV_ID("sh_mobile_ceu.0", &mstp_clks[MSTP127]), /* CEU0 */
 	CLKDEV_DEV_ID("sh-mobile-csi2.0", &mstp_clks[MSTP126]), /* CSI2-RX0 */
 	CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP125]), /* TMU00 */
+	CLKDEV_DEV_ID("fff60008.timer", &mstp_clks[MSTP125]), /* TMU00 */
 	CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP125]), /* TMU01 */
+	CLKDEV_DEV_ID("fff60014.timer", &mstp_clks[MSTP125]), /* TMU01 */
 	CLKDEV_DEV_ID("sh-mipi-dsi.0", &mstp_clks[MSTP118]), /* DSITX */
 	CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[MSTP116]), /* I2C0 */
 	CLKDEV_DEV_ID("e6820000.i2c", &mstp_clks[MSTP116]), /* I2C0 */
@@ -575,6 +577,7 @@ static struct clk_lookup lookups[] = {
 	CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP200]), /* SCIFA4 */
 	CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[MSTP331]), /* SCIFA6 */
 	CLKDEV_DEV_ID("sh_cmt.10", &mstp_clks[MSTP329]), /* CMT10 */
+	CLKDEV_DEV_ID("e6138010.timer", &mstp_clks[MSTP329]), /* CMT10 */
 	CLKDEV_DEV_ID("sh_fsi2", &mstp_clks[MSTP328]), /* FSI */
 	CLKDEV_DEV_ID("sh_irda.0", &mstp_clks[MSTP325]), /* IrDA */
 	CLKDEV_DEV_ID("i2c-sh_mobile.1", &mstp_clks[MSTP323]), /* I2C1 */
-- 
1.7.9.5

[PATCH v2 5/7] ARM: mach-shmobile: sh73a0: Setup the timer CMT10 using DT

[Bastian Hecht]

We can now use the Device Tree for bringing up our timer device CMT10 on
the SoC sh73a0.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2:
- Moved the definition from the board .dts to the SoC .dtsi
- Renamed cmt@0xe6138010 to timer@e6138010

 arch/arm/boot/dts/sh73a0.dtsi         |   11 +++++++++++
 arch/arm/mach-shmobile/setup-sh73a0.c |   32 --------------------------------
 2 files changed, 11 insertions(+), 32 deletions(-)

diff --git a/arch/arm/boot/dts/sh73a0.dtsi b/arch/arm/boot/dts/sh73a0.dtsi
index 8a59465..6549d6c 100644
--- a/arch/arm/boot/dts/sh73a0.dtsi
+++ b/arch/arm/boot/dts/sh73a0.dtsi
@@ -97,4 +97,15 @@
 			      0 189 0x4
 			      0 190 0x4>;
 	};
+
+	timer@e6138010 {
+		compatible = "renesas,cmt-timer";
+		interrupt-parent = <&gic>;
+		reg = <0xe6138010 0xc>;
+		interrupts = <0 65 0x4>;
+		renesas,device-id = <1>;
+		renesas,channel-id = <0>;
+		renesas,source-quality = <3>;
+		renesas,event-quality = <3>;
+	};
 };
diff --git a/arch/arm/mach-shmobile/setup-sh73a0.c b/arch/arm/mach-shmobile/setup-sh73a0.c
index 95a75af..64bc2c5 100644
--- a/arch/arm/mach-shmobile/setup-sh73a0.c
+++ b/arch/arm/mach-shmobile/setup-sh73a0.c
@@ -247,37 +247,6 @@ static struct platform_device scif8_device = {
 	},
 };
 
-static struct sh_timer_config cmt10_platform_data = {
-	.name = "CMT10",
-	.channel_offset = 0x10,
-	.timer_bit = 0,
-	.clockevent_rating = 125,
-	.clocksource_rating = 125,
-};
-
-static struct resource cmt10_resources[] = {
-	[0] = {
-		.name	= "CMT10",
-		.start	= 0xe6138010,
-		.end	= 0xe613801b,
-		.flags	= IORESOURCE_MEM,
-	},
-	[1] = {
-		.start	= gic_spi(65),
-		.flags	= IORESOURCE_IRQ,
-	},
-};
-
-static struct platform_device cmt10_device = {
-	.name		= "sh_cmt",
-	.id		= 10,
-	.dev = {
-		.platform_data	= &cmt10_platform_data,
-	},
-	.resource	= cmt10_resources,
-	.num_resources	= ARRAY_SIZE(cmt10_resources),
-};
-
 /* TMU */
 static struct sh_timer_config tmu00_platform_data = {
 	.name = "TMU00",
@@ -913,7 +882,6 @@ static struct platform_device *sh73a0_devices_dt[] __initdata = {
 	&scif6_device,
 	&scif7_device,
 	&scif8_device,
-	&cmt10_device,
 };
 
 static struct platform_device *sh73a0_early_devices[] __initdata = {
-- 
1.7.9.5

[PATCH v2 5/7] ARM: mach-shmobile: sh73a0: Setup the timer CMT10 using DT

[Bastian Hecht]

We can now use the Device Tree for bringing up our timer device CMT10 on
the SoC sh73a0.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2:
- Moved the definition from the board .dts to the SoC .dtsi
- Renamed cmt at 0xe6138010 to timer at e6138010

 arch/arm/boot/dts/sh73a0.dtsi         |   11 +++++++++++
 arch/arm/mach-shmobile/setup-sh73a0.c |   32 --------------------------------
 2 files changed, 11 insertions(+), 32 deletions(-)

diff --git a/arch/arm/boot/dts/sh73a0.dtsi b/arch/arm/boot/dts/sh73a0.dtsi
index 8a59465..6549d6c 100644
--- a/arch/arm/boot/dts/sh73a0.dtsi
+++ b/arch/arm/boot/dts/sh73a0.dtsi
@@ -97,4 +97,15 @@
 			      0 189 0x4
 			      0 190 0x4>;
 	};
+
+	timer at e6138010 {
+		compatible = "renesas,cmt-timer";
+		interrupt-parent = <&gic>;
+		reg = <0xe6138010 0xc>;
+		interrupts = <0 65 0x4>;
+		renesas,device-id = <1>;
+		renesas,channel-id = <0>;
+		renesas,source-quality = <3>;
+		renesas,event-quality = <3>;
+	};
 };
diff --git a/arch/arm/mach-shmobile/setup-sh73a0.c b/arch/arm/mach-shmobile/setup-sh73a0.c
index 95a75af..64bc2c5 100644
--- a/arch/arm/mach-shmobile/setup-sh73a0.c
+++ b/arch/arm/mach-shmobile/setup-sh73a0.c
@@ -247,37 +247,6 @@ static struct platform_device scif8_device = {
 	},
 };
 
-static struct sh_timer_config cmt10_platform_data = {
-	.name = "CMT10",
-	.channel_offset = 0x10,
-	.timer_bit = 0,
-	.clockevent_rating = 125,
-	.clocksource_rating = 125,
-};
-
-static struct resource cmt10_resources[] = {
-	[0] = {
-		.name	= "CMT10",
-		.start	= 0xe6138010,
-		.end	= 0xe613801b,
-		.flags	= IORESOURCE_MEM,
-	},
-	[1] = {
-		.start	= gic_spi(65),
-		.flags	= IORESOURCE_IRQ,
-	},
-};
-
-static struct platform_device cmt10_device = {
-	.name		= "sh_cmt",
-	.id		= 10,
-	.dev = {
-		.platform_data	= &cmt10_platform_data,
-	},
-	.resource	= cmt10_resources,
-	.num_resources	= ARRAY_SIZE(cmt10_resources),
-};
-
 /* TMU */
 static struct sh_timer_config tmu00_platform_data = {
 	.name = "TMU00",
@@ -913,7 +882,6 @@ static struct platform_device *sh73a0_devices_dt[] __initdata = {
 	&scif6_device,
 	&scif7_device,
 	&scif8_device,
-	&cmt10_device,
 };
 
 static struct platform_device *sh73a0_early_devices[] __initdata = {
-- 
1.7.9.5

[PATCH v2 6/7] ARM: shmobile: r8a7740: Add DT name to clock list for CMT10

[Bastian Hecht]

This adds temporarily the alternative device name to the clock list
that is used when booting via Device Tree setup.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2: new

I can rebase this on topic/intc-of if wanted.

 arch/arm/mach-shmobile/clock-r8a7740.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-shmobile/clock-r8a7740.c b/arch/arm/mach-shmobile/clock-r8a7740.c
index 1feb9a2..b0b5d3c 100644
--- a/arch/arm/mach-shmobile/clock-r8a7740.c
+++ b/arch/arm/mach-shmobile/clock-r8a7740.c
@@ -616,6 +616,7 @@ static struct clk_lookup lookups[] = {
 	CLKDEV_DEV_ID("e6cc0000.sci",		&mstp_clks[MSTP230]),
 
 	CLKDEV_DEV_ID("sh_cmt.10",		&mstp_clks[MSTP329]),
+	CLKDEV_DEV_ID("e6138010.timer",		&mstp_clks[MSTP329]),
 	CLKDEV_DEV_ID("sh_fsi2",		&mstp_clks[MSTP328]),
 	CLKDEV_DEV_ID("i2c-sh_mobile.1",	&mstp_clks[MSTP323]),
 	CLKDEV_DEV_ID("renesas_usbhs",		&mstp_clks[MSTP320]),
-- 
1.7.9.5

[PATCH v2 6/7] ARM: shmobile: r8a7740: Add DT name to clock list for CMT10

[Bastian Hecht]

This adds temporarily the alternative device name to the clock list
that is used when booting via Device Tree setup.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2: new

I can rebase this on topic/intc-of if wanted.

 arch/arm/mach-shmobile/clock-r8a7740.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-shmobile/clock-r8a7740.c b/arch/arm/mach-shmobile/clock-r8a7740.c
index 1feb9a2..b0b5d3c 100644
--- a/arch/arm/mach-shmobile/clock-r8a7740.c
+++ b/arch/arm/mach-shmobile/clock-r8a7740.c
@@ -616,6 +616,7 @@ static struct clk_lookup lookups[] = {
 	CLKDEV_DEV_ID("e6cc0000.sci",		&mstp_clks[MSTP230]),
 
 	CLKDEV_DEV_ID("sh_cmt.10",		&mstp_clks[MSTP329]),
+	CLKDEV_DEV_ID("e6138010.timer",		&mstp_clks[MSTP329]),
 	CLKDEV_DEV_ID("sh_fsi2",		&mstp_clks[MSTP328]),
 	CLKDEV_DEV_ID("i2c-sh_mobile.1",	&mstp_clks[MSTP323]),
 	CLKDEV_DEV_ID("renesas_usbhs",		&mstp_clks[MSTP320]),
-- 
1.7.9.5

[PATCH v2 7/7] ARM: mach-shmobile: r8a7740: Setup the timer CMT10 using DT

[Bastian Hecht]

We can now use the Device Tree for bringing up our timer device CMT10 on
the SoC r8a7740.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2: new

I can rebase this on topic/intc-of if wanted.

 arch/arm/boot/dts/r8a7740.dtsi         |   11 +++++++++++
 arch/arm/mach-shmobile/setup-r8a7740.c |   33 --------------------------------
 2 files changed, 11 insertions(+), 33 deletions(-)

diff --git a/arch/arm/boot/dts/r8a7740.dtsi b/arch/arm/boot/dts/r8a7740.dtsi
index 798fa35..72f4c80 100644
--- a/arch/arm/boot/dts/r8a7740.dtsi
+++ b/arch/arm/boot/dts/r8a7740.dtsi
@@ -18,4 +18,15 @@
 			compatible = "arm,cortex-a9";
 		};
 	};
+
+	timer@e6138010 {
+		compatible = "renesas,cmt-timer";
+		interrupt-parent = <&intca>;
+		reg = <0xe6138010 0xc>;
+		interrupts = <0x0b00>;
+		renesas,device-id = <1>;
+		renesas,channel-id = <0>;
+		renesas,source-quality = <3>;
+		renesas,event-quality = <3>;
+	};
 };
diff --git a/arch/arm/mach-shmobile/setup-r8a7740.c b/arch/arm/mach-shmobile/setup-r8a7740.c
index 30ac79c..9db61a6 100644
--- a/arch/arm/mach-shmobile/setup-r8a7740.c
+++ b/arch/arm/mach-shmobile/setup-r8a7740.c
@@ -255,38 +255,6 @@ static struct platform_device scifb_device = {
 	},
 };
 
-/* CMT */
-static struct sh_timer_config cmt10_platform_data = {
-	.name = "CMT10",
-	.channel_offset = 0x10,
-	.timer_bit = 0,
-	.clockevent_rating = 125,
-	.clocksource_rating = 125,
-};
-
-static struct resource cmt10_resources[] = {
-	[0] = {
-		.name	= "CMT10",
-		.start	= 0xe6138010,
-		.end	= 0xe613801b,
-		.flags	= IORESOURCE_MEM,
-	},
-	[1] = {
-		.start	= evt2irq(0x0b00),
-		.flags	= IORESOURCE_IRQ,
-	},
-};
-
-static struct platform_device cmt10_device = {
-	.name		= "sh_cmt",
-	.id		= 10,
-	.dev = {
-		.platform_data	= &cmt10_platform_data,
-	},
-	.resource	= cmt10_resources,
-	.num_resources	= ARRAY_SIZE(cmt10_resources),
-};
-
 /* TMU */
 static struct sh_timer_config tmu00_platform_data = {
 	.name = "TMU00",
@@ -388,7 +356,6 @@ static struct platform_device *r8a7740_early_devices[] __initdata = {
 	&scif6_device,
 	&scif7_device,
 	&scifb_device,
-	&cmt10_device,
 	&tmu00_device,
 	&tmu01_device,
 	&tmu02_device,
-- 
1.7.9.5

[PATCH v2 7/7] ARM: mach-shmobile: r8a7740: Setup the timer CMT10 using DT

[Bastian Hecht]

We can now use the Device Tree for bringing up our timer device CMT10 on
the SoC r8a7740.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
---
v2: new

I can rebase this on topic/intc-of if wanted.

 arch/arm/boot/dts/r8a7740.dtsi         |   11 +++++++++++
 arch/arm/mach-shmobile/setup-r8a7740.c |   33 --------------------------------
 2 files changed, 11 insertions(+), 33 deletions(-)

diff --git a/arch/arm/boot/dts/r8a7740.dtsi b/arch/arm/boot/dts/r8a7740.dtsi
index 798fa35..72f4c80 100644
--- a/arch/arm/boot/dts/r8a7740.dtsi
+++ b/arch/arm/boot/dts/r8a7740.dtsi
@@ -18,4 +18,15 @@
 			compatible = "arm,cortex-a9";
 		};
 	};
+
+	timer at e6138010 {
+		compatible = "renesas,cmt-timer";
+		interrupt-parent = <&intca>;
+		reg = <0xe6138010 0xc>;
+		interrupts = <0x0b00>;
+		renesas,device-id = <1>;
+		renesas,channel-id = <0>;
+		renesas,source-quality = <3>;
+		renesas,event-quality = <3>;
+	};
 };
diff --git a/arch/arm/mach-shmobile/setup-r8a7740.c b/arch/arm/mach-shmobile/setup-r8a7740.c
index 30ac79c..9db61a6 100644
--- a/arch/arm/mach-shmobile/setup-r8a7740.c
+++ b/arch/arm/mach-shmobile/setup-r8a7740.c
@@ -255,38 +255,6 @@ static struct platform_device scifb_device = {
 	},
 };
 
-/* CMT */
-static struct sh_timer_config cmt10_platform_data = {
-	.name = "CMT10",
-	.channel_offset = 0x10,
-	.timer_bit = 0,
-	.clockevent_rating = 125,
-	.clocksource_rating = 125,
-};
-
-static struct resource cmt10_resources[] = {
-	[0] = {
-		.name	= "CMT10",
-		.start	= 0xe6138010,
-		.end	= 0xe613801b,
-		.flags	= IORESOURCE_MEM,
-	},
-	[1] = {
-		.start	= evt2irq(0x0b00),
-		.flags	= IORESOURCE_IRQ,
-	},
-};
-
-static struct platform_device cmt10_device = {
-	.name		= "sh_cmt",
-	.id		= 10,
-	.dev = {
-		.platform_data	= &cmt10_platform_data,
-	},
-	.resource	= cmt10_resources,
-	.num_resources	= ARRAY_SIZE(cmt10_resources),
-};
-
 /* TMU */
 static struct sh_timer_config tmu00_platform_data = {
 	.name = "TMU00",
@@ -388,7 +356,6 @@ static struct platform_device *r8a7740_early_devices[] __initdata = {
 	&scif6_device,
 	&scif7_device,
 	&scifb_device,
-	&cmt10_device,
 	&tmu00_device,
 	&tmu01_device,
 	&tmu02_device,
-- 
1.7.9.5

Re: [PATCH v2 5/7] ARM: mach-shmobile: sh73a0: Setup the timer CMT10 using DT

[Kuninori Morimoto]

Hi Bastian

1 question

> We can now use the Device Tree for bringing up our timer device CMT10 on
> the SoC sh73a0.
> 
> Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
(snip)
>  /* TMU */
>  static struct sh_timer_config tmu00_platform_data = {
>  	.name = "TMU00",
> @@ -913,7 +882,6 @@ static struct platform_device *sh73a0_devices_dt[] __initdata = {
>  	&scif6_device,
>  	&scif7_device,
>  	&scif8_device,
> -	&cmt10_device,
>  };

I didn't test this patch,
but setup-sh73a0.c :: sh73a0_devices_dt is
used from sh73a0_add_standard_devices() or sh73a0_add_early_devices(),
and it is used from board-kzm9g.c (not -reference.c).

Does board-kzm9g.c still works ?
Is it better that sh73a0_early_devices[] has it ?


Best regards
---
Kuninori Morimoto

[PATCH v2 5/7] ARM: mach-shmobile: sh73a0: Setup the timer CMT10 using DT

[Kuninori Morimoto]

Hi Bastian

1 question

> We can now use the Device Tree for bringing up our timer device CMT10 on
> the SoC sh73a0.
> 
> Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
(snip)
>  /* TMU */
>  static struct sh_timer_config tmu00_platform_data = {
>  	.name = "TMU00",
> @@ -913,7 +882,6 @@ static struct platform_device *sh73a0_devices_dt[] __initdata = {
>  	&scif6_device,
>  	&scif7_device,
>  	&scif8_device,
> -	&cmt10_device,
>  };

I didn't test this patch,
but setup-sh73a0.c :: sh73a0_devices_dt is
used from sh73a0_add_standard_devices() or sh73a0_add_early_devices(),
and it is used from board-kzm9g.c (not -reference.c).

Does board-kzm9g.c still works ?
Is it better that sh73a0_early_devices[] has it ?


Best regards
---
Kuninori Morimoto

Re: [PATCH v2 5/7] ARM: mach-shmobile: sh73a0: Setup the timer CMT10 using DT

[Bastian Hecht]

Hello Morimoto-san!

2013/3/11 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>:
>
> Hi Bastian
>
> 1 question
>
>> We can now use the Device Tree for bringing up our timer device CMT10 on
>> the SoC sh73a0.
>>
>> Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
> (snip)
>>  /* TMU */
>>  static struct sh_timer_config tmu00_platform_data = {
>>       .name = "TMU00",
>> @@ -913,7 +882,6 @@ static struct platform_device *sh73a0_devices_dt[] __initdata = {
>>       &scif6_device,
>>       &scif7_device,
>>       &scif8_device,
>> -     &cmt10_device,
>>  };
>
> I didn't test this patch,
> but setup-sh73a0.c :: sh73a0_devices_dt is
> used from sh73a0_add_standard_devices() or sh73a0_add_early_devices(),
> and it is used from board-kzm9g.c (not -reference.c).
>
> Does board-kzm9g.c still works ?
> Is it better that sh73a0_early_devices[] has it ?
>

As the timer devices have no board dependencies we can put them into
the general sh73a0.dtsi and it works for the reference and
no-reference case.

Still - while rechecking it I discovered a small slip I made in my
series. In 0003-Add OF to TMU I forgot 2 trivial lines. So thanks for
asking ;)

Cheers,

 Bastian


> Best regards
> ---
> Kuninori Morimoto

[PATCH v2 5/7] ARM: mach-shmobile: sh73a0: Setup the timer CMT10 using DT

[Bastian Hecht]

Hello Morimoto-san!

2013/3/11 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>:
>
> Hi Bastian
>
> 1 question
>
>> We can now use the Device Tree for bringing up our timer device CMT10 on
>> the SoC sh73a0.
>>
>> Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
> (snip)
>>  /* TMU */
>>  static struct sh_timer_config tmu00_platform_data = {
>>       .name = "TMU00",
>> @@ -913,7 +882,6 @@ static struct platform_device *sh73a0_devices_dt[] __initdata = {
>>       &scif6_device,
>>       &scif7_device,
>>       &scif8_device,
>> -     &cmt10_device,
>>  };
>
> I didn't test this patch,
> but setup-sh73a0.c :: sh73a0_devices_dt is
> used from sh73a0_add_standard_devices() or sh73a0_add_early_devices(),
> and it is used from board-kzm9g.c (not -reference.c).
>
> Does board-kzm9g.c still works ?
> Is it better that sh73a0_early_devices[] has it ?
>

As the timer devices have no board dependencies we can put them into
the general sh73a0.dtsi and it works for the reference and
no-reference case.

Still - while rechecking it I discovered a small slip I made in my
series. In 0003-Add OF to TMU I forgot 2 trivial lines. So thanks for
asking ;)

Cheers,

 Bastian


> Best regards
> ---
> Kuninori Morimoto

Re: [PATCH v2 3/7] clocksource: sh_tmu: Add OF support

[Bastian Hecht]

Hello all,

this patch misses 2 trivial lines in static int sh_tmu_setup():

+       p->channel_offset = cfg->channel_offset;
+       p->timer_bit = cfg->timer_bit;

In such a case, do I post a complete v3 series containing 7 patches?
Or just this single patch as v3?

Thanks,

 Bastian


2013/3/8 Bastian Hecht <hechtb@gmail.com>:
> We add the capabilty to probe SH CMT timer devices using Device Tree
> setup.
>
> Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
> ---
> v2: new. Done analogously to the cmt driver
>
>  drivers/clocksource/sh_tmu.c |   94 +++++++++++++++++++++++++++++++++++++-----
>  1 file changed, 83 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
> index b4502edc..7d5c999 100644
> --- a/drivers/clocksource/sh_tmu.c
> +++ b/drivers/clocksource/sh_tmu.c
> @@ -34,10 +34,13 @@
>  #include <linux/module.h>
>  #include <linux/pm_domain.h>
>  #include <linux/pm_runtime.h>
> +#include <linux/of.h>
>
>  struct sh_tmu_priv {
>         void __iomem *mapbase;
>         struct clk *clk;
> +       long channel_offset;
> +       int timer_bit;
>         struct irqaction irqaction;
>         struct platform_device *pdev;
>         unsigned long rate;
> @@ -57,12 +60,11 @@ static DEFINE_RAW_SPINLOCK(sh_tmu_lock);
>
>  static inline unsigned long sh_tmu_read(struct sh_tmu_priv *p, int reg_nr)
>  {
> -       struct sh_timer_config *cfg = p->pdev->dev.platform_data;
>         void __iomem *base = p->mapbase;
>         unsigned long offs;
>
>         if (reg_nr = TSTR)
> -               return ioread8(base - cfg->channel_offset);
> +               return ioread8(base - p->channel_offset);
>
>         offs = reg_nr << 2;
>
> @@ -75,12 +77,11 @@ static inline unsigned long sh_tmu_read(struct sh_tmu_priv *p, int reg_nr)
>  static inline void sh_tmu_write(struct sh_tmu_priv *p, int reg_nr,
>                                 unsigned long value)
>  {
> -       struct sh_timer_config *cfg = p->pdev->dev.platform_data;
>         void __iomem *base = p->mapbase;
>         unsigned long offs;
>
>         if (reg_nr = TSTR) {
> -               iowrite8(value, base - cfg->channel_offset);
> +               iowrite8(value, base - p->channel_offset);
>                 return;
>         }
>
> @@ -94,7 +95,6 @@ static inline void sh_tmu_write(struct sh_tmu_priv *p, int reg_nr,
>
>  static void sh_tmu_start_stop_ch(struct sh_tmu_priv *p, int start)
>  {
> -       struct sh_timer_config *cfg = p->pdev->dev.platform_data;
>         unsigned long flags, value;
>
>         /* start stop register shared by multiple timer channels */
> @@ -102,9 +102,9 @@ static void sh_tmu_start_stop_ch(struct sh_tmu_priv *p, int start)
>         value = sh_tmu_read(p, TSTR);
>
>         if (start)
> -               value |= 1 << cfg->timer_bit;
> +               value |= 1 << p->timer_bit;
>         else
> -               value &= ~(1 << cfg->timer_bit);
> +               value &= ~(1 << p->timer_bit);
>
>         sh_tmu_write(p, TSTR, value);
>         raw_spin_unlock_irqrestore(&sh_tmu_lock, flags);
> @@ -421,9 +421,75 @@ static int sh_tmu_register(struct sh_tmu_priv *p, char *name,
>         return 0;
>  }
>
> -static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev)
> +static const struct of_device_id of_sh_tmu_match[] = {
> +       { .compatible = "renesas,tmu-timer" },
> +       {},
> +};
> +MODULE_DEVICE_TABLE(of, of_sh_tmu_match);
> +
> +#define TMU_OFFSET_MULTIPLIER  0xc
> +#define TMU_MAX_CHANNELS       3
> +
> +static struct sh_timer_config *sh_tmu_parse_dt(struct device *dev)
> +{
> +       struct sh_timer_config *cfg;
> +       struct device_node *np = dev->of_node;
> +       u32 channel_id, rating;
> +
> +       if (!IS_ENABLED(CONFIG_OF) || !np)
> +               return NULL;
> +
> +       cfg = devm_kzalloc(dev, sizeof(struct sh_timer_config), GFP_KERNEL);
> +       if (!cfg) {
> +               dev_err(dev, "failed to allocate DT config data\n");
> +               return NULL;
> +       }
> +
> +       if (of_property_read_u32(np, "renesas,channel-id", &channel_id)) {
> +               dev_err(dev, "channel id missing\n");
> +               return NULL;
> +       }
> +       if (channel_id >= TMU_MAX_CHANNELS) {
> +               dev_err(dev, "invalid channel id\n");
> +               return NULL;
> +       }
> +
> +       cfg->channel_offset = channel_id * TMU_OFFSET_MULTIPLIER + 4;
> +       cfg->timer_bit = channel_id;
> +
> +       /*
> +        * We convert the {source,event}-quality DT properties to linux specific
> +        * clock{source,event}_ratings.
> +        */
> +       if (!of_property_read_u32(np, "renesas,source-quality", &rating)) {
> +               if (rating > 10) {
> +                       dev_err(dev, "invalid source-quality\n");
> +                       return NULL;
> +               }
> +               if (rating)
> +                       cfg->clocksource_rating = rating * 50 - 1;
> +       }
> +
> +       if (!of_property_read_u32(np, "renesas,event-quality", &rating)) {
> +               if (rating > 10) {
> +                       dev_err(dev, "invalid event-quality\n");
> +                       return NULL;
> +               }
> +               if (rating)
> +                       cfg->clockevent_rating = rating * 50 - 1;
> +       }
> +
> +       if (!cfg->clocksource_rating && !cfg->clockevent_rating) {
> +               dev_err(dev, "source- and event-quality 0, timer is unused\n");
> +               return NULL;
> +       }
> +
> +       return cfg;
> +}
> +
> +static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev,
> +                                               struct sh_timer_config *cfg)
>  {
> -       struct sh_timer_config *cfg = pdev->dev.platform_data;
>         struct resource *res;
>         int irq, ret;
>         ret = -ENXIO;
> @@ -487,7 +553,7 @@ static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev)
>  static int sh_tmu_probe(struct platform_device *pdev)
>  {
>         struct sh_tmu_priv *p = platform_get_drvdata(pdev);
> -       struct sh_timer_config *cfg = pdev->dev.platform_data;
> +       struct sh_timer_config *cfg;
>         int ret;
>
>         if (!is_early_platform_device(pdev)) {
> @@ -495,6 +561,11 @@ static int sh_tmu_probe(struct platform_device *pdev)
>                 pm_runtime_enable(&pdev->dev);
>         }
>
> +       if (pdev->dev.of_node)
> +               cfg = sh_tmu_parse_dt(&pdev->dev);
> +       else
> +               cfg = pdev->dev.platform_data;
> +
>         if (p) {
>                 dev_info(&pdev->dev, "kept as earlytimer\n");
>                 goto out;
> @@ -506,7 +577,7 @@ static int sh_tmu_probe(struct platform_device *pdev)
>                 return -ENOMEM;
>         }
>
> -       ret = sh_tmu_setup(p, pdev);
> +       ret = sh_tmu_setup(p, pdev, cfg);
>         if (ret) {
>                 kfree(p);
>                 platform_set_drvdata(pdev, NULL);
> @@ -535,6 +606,7 @@ static struct platform_driver sh_tmu_device_driver = {
>         .remove         = sh_tmu_remove,
>         .driver         = {
>                 .name   = "sh_tmu",
> +               .of_match_table = of_sh_tmu_match,
>         }
>  };
>
> --
> 1.7.9.5
>

[PATCH v2 3/7] clocksource: sh_tmu: Add OF support

[Bastian Hecht]

Hello all,

this patch misses 2 trivial lines in static int sh_tmu_setup():

+       p->channel_offset = cfg->channel_offset;
+       p->timer_bit = cfg->timer_bit;

In such a case, do I post a complete v3 series containing 7 patches?
Or just this single patch as v3?

Thanks,

 Bastian


2013/3/8 Bastian Hecht <hechtb@gmail.com>:
> We add the capabilty to probe SH CMT timer devices using Device Tree
> setup.
>
> Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
> ---
> v2: new. Done analogously to the cmt driver
>
>  drivers/clocksource/sh_tmu.c |   94 +++++++++++++++++++++++++++++++++++++-----
>  1 file changed, 83 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
> index b4502edc..7d5c999 100644
> --- a/drivers/clocksource/sh_tmu.c
> +++ b/drivers/clocksource/sh_tmu.c
> @@ -34,10 +34,13 @@
>  #include <linux/module.h>
>  #include <linux/pm_domain.h>
>  #include <linux/pm_runtime.h>
> +#include <linux/of.h>
>
>  struct sh_tmu_priv {
>         void __iomem *mapbase;
>         struct clk *clk;
> +       long channel_offset;
> +       int timer_bit;
>         struct irqaction irqaction;
>         struct platform_device *pdev;
>         unsigned long rate;
> @@ -57,12 +60,11 @@ static DEFINE_RAW_SPINLOCK(sh_tmu_lock);
>
>  static inline unsigned long sh_tmu_read(struct sh_tmu_priv *p, int reg_nr)
>  {
> -       struct sh_timer_config *cfg = p->pdev->dev.platform_data;
>         void __iomem *base = p->mapbase;
>         unsigned long offs;
>
>         if (reg_nr == TSTR)
> -               return ioread8(base - cfg->channel_offset);
> +               return ioread8(base - p->channel_offset);
>
>         offs = reg_nr << 2;
>
> @@ -75,12 +77,11 @@ static inline unsigned long sh_tmu_read(struct sh_tmu_priv *p, int reg_nr)
>  static inline void sh_tmu_write(struct sh_tmu_priv *p, int reg_nr,
>                                 unsigned long value)
>  {
> -       struct sh_timer_config *cfg = p->pdev->dev.platform_data;
>         void __iomem *base = p->mapbase;
>         unsigned long offs;
>
>         if (reg_nr == TSTR) {
> -               iowrite8(value, base - cfg->channel_offset);
> +               iowrite8(value, base - p->channel_offset);
>                 return;
>         }
>
> @@ -94,7 +95,6 @@ static inline void sh_tmu_write(struct sh_tmu_priv *p, int reg_nr,
>
>  static void sh_tmu_start_stop_ch(struct sh_tmu_priv *p, int start)
>  {
> -       struct sh_timer_config *cfg = p->pdev->dev.platform_data;
>         unsigned long flags, value;
>
>         /* start stop register shared by multiple timer channels */
> @@ -102,9 +102,9 @@ static void sh_tmu_start_stop_ch(struct sh_tmu_priv *p, int start)
>         value = sh_tmu_read(p, TSTR);
>
>         if (start)
> -               value |= 1 << cfg->timer_bit;
> +               value |= 1 << p->timer_bit;
>         else
> -               value &= ~(1 << cfg->timer_bit);
> +               value &= ~(1 << p->timer_bit);
>
>         sh_tmu_write(p, TSTR, value);
>         raw_spin_unlock_irqrestore(&sh_tmu_lock, flags);
> @@ -421,9 +421,75 @@ static int sh_tmu_register(struct sh_tmu_priv *p, char *name,
>         return 0;
>  }
>
> -static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev)
> +static const struct of_device_id of_sh_tmu_match[] = {
> +       { .compatible = "renesas,tmu-timer" },
> +       {},
> +};
> +MODULE_DEVICE_TABLE(of, of_sh_tmu_match);
> +
> +#define TMU_OFFSET_MULTIPLIER  0xc
> +#define TMU_MAX_CHANNELS       3
> +
> +static struct sh_timer_config *sh_tmu_parse_dt(struct device *dev)
> +{
> +       struct sh_timer_config *cfg;
> +       struct device_node *np = dev->of_node;
> +       u32 channel_id, rating;
> +
> +       if (!IS_ENABLED(CONFIG_OF) || !np)
> +               return NULL;
> +
> +       cfg = devm_kzalloc(dev, sizeof(struct sh_timer_config), GFP_KERNEL);
> +       if (!cfg) {
> +               dev_err(dev, "failed to allocate DT config data\n");
> +               return NULL;
> +       }
> +
> +       if (of_property_read_u32(np, "renesas,channel-id", &channel_id)) {
> +               dev_err(dev, "channel id missing\n");
> +               return NULL;
> +       }
> +       if (channel_id >= TMU_MAX_CHANNELS) {
> +               dev_err(dev, "invalid channel id\n");
> +               return NULL;
> +       }
> +
> +       cfg->channel_offset = channel_id * TMU_OFFSET_MULTIPLIER + 4;
> +       cfg->timer_bit = channel_id;
> +
> +       /*
> +        * We convert the {source,event}-quality DT properties to linux specific
> +        * clock{source,event}_ratings.
> +        */
> +       if (!of_property_read_u32(np, "renesas,source-quality", &rating)) {
> +               if (rating > 10) {
> +                       dev_err(dev, "invalid source-quality\n");
> +                       return NULL;
> +               }
> +               if (rating)
> +                       cfg->clocksource_rating = rating * 50 - 1;
> +       }
> +
> +       if (!of_property_read_u32(np, "renesas,event-quality", &rating)) {
> +               if (rating > 10) {
> +                       dev_err(dev, "invalid event-quality\n");
> +                       return NULL;
> +               }
> +               if (rating)
> +                       cfg->clockevent_rating = rating * 50 - 1;
> +       }
> +
> +       if (!cfg->clocksource_rating && !cfg->clockevent_rating) {
> +               dev_err(dev, "source- and event-quality 0, timer is unused\n");
> +               return NULL;
> +       }
> +
> +       return cfg;
> +}
> +
> +static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev,
> +                                               struct sh_timer_config *cfg)
>  {
> -       struct sh_timer_config *cfg = pdev->dev.platform_data;
>         struct resource *res;
>         int irq, ret;
>         ret = -ENXIO;
> @@ -487,7 +553,7 @@ static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev)
>  static int sh_tmu_probe(struct platform_device *pdev)
>  {
>         struct sh_tmu_priv *p = platform_get_drvdata(pdev);
> -       struct sh_timer_config *cfg = pdev->dev.platform_data;
> +       struct sh_timer_config *cfg;
>         int ret;
>
>         if (!is_early_platform_device(pdev)) {
> @@ -495,6 +561,11 @@ static int sh_tmu_probe(struct platform_device *pdev)
>                 pm_runtime_enable(&pdev->dev);
>         }
>
> +       if (pdev->dev.of_node)
> +               cfg = sh_tmu_parse_dt(&pdev->dev);
> +       else
> +               cfg = pdev->dev.platform_data;
> +
>         if (p) {
>                 dev_info(&pdev->dev, "kept as earlytimer\n");
>                 goto out;
> @@ -506,7 +577,7 @@ static int sh_tmu_probe(struct platform_device *pdev)
>                 return -ENOMEM;
>         }
>
> -       ret = sh_tmu_setup(p, pdev);
> +       ret = sh_tmu_setup(p, pdev, cfg);
>         if (ret) {
>                 kfree(p);
>                 platform_set_drvdata(pdev, NULL);
> @@ -535,6 +606,7 @@ static struct platform_driver sh_tmu_device_driver = {
>         .remove         = sh_tmu_remove,
>         .driver         = {
>                 .name   = "sh_tmu",
> +               .of_match_table = of_sh_tmu_match,
>         }
>  };
>
> --
> 1.7.9.5
>