[PATCH v3 0/6] clocksource: timer-ti-dm: Prepare for dynamic pwm period updates

[PATCH v3 0/6] clocksource: timer-ti-dm: Prepare for dynamic pwm period updates

[Lokesh Vutla]

This series fixes dm_timer_ops used for enabling the pwm and enables
cpu_pm notifier for context save and restore. This acts as a preparatory
series for enabling dynamic period updates for pwm omap dm timer driver.

Changes since v2:
- Incorporated changes from Tony

Changes since v1:
- Updated License header to use SPDX identifier
- Implemented cpu_pm notfier
- Added support for getting pwm current status
- Extended set_pwm functionality.

Lokesh Vutla (5):
  clocksource: timer-ti-dm: Convert to SPDX identifier
  clocksource: timer-ti-dm: Implement cpu_pm notifier for context save
    and restore
  clocksource: timer-ti-dm: Do not update counter on updating the period
  clocksource: timer-ti-dm: Add support to get pwm current status
  clocksource: timer-ti-dm: Enable autoreload in set_pwm

Tony Lindgren (1):
  clocksource: timer-ti-dm: Prepare for using cpuidle

 drivers/clocksource/timer-ti-dm.c          | 186 ++++++++++++---------
 drivers/pwm/pwm-omap-dmtimer.c             |   8 +-
 include/clocksource/timer-ti-dm.h          |   4 +-
 include/linux/platform_data/dmtimer-omap.h |   6 +-
 4 files changed, 121 insertions(+), 83 deletions(-)

-- 
2.23.0

[PATCH v3 1/6] clocksource: timer-ti-dm: Convert to SPDX identifier

[Lokesh Vutla]

Use SPDX-License-Identifier instead of a verbose license text.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
---
 drivers/clocksource/timer-ti-dm.c | 19 +------------------
 1 file changed, 1 insertion(+), 18 deletions(-)

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index d8637a60a7eb..bf132d321ecc 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * linux/arch/arm/plat-omap/dmtimer.c
  *
@@ -15,24 +16,6 @@
  *
  * Copyright (C) 2009 Texas Instruments
  * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
- *
- * 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; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the  GNU General Public License along
- * with this program; if not, write  to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include <linux/clk.h>
-- 
2.23.0

Re: [PATCH v3 1/6] clocksource: timer-ti-dm: Convert to SPDX identifier

[Tony Lindgren]

* Lokesh Vutla <lokeshvutla@ti.com> [200305 08:29]:
> Use SPDX-License-Identifier instead of a verbose license text.

Acked-by: Tony Lindgren <tony@atomide.com>

[PATCH v3 2/6] clocksource: timer-ti-dm: Prepare for using cpuidle

[Lokesh Vutla]

From: Tony Lindgren <tony@atomide.com>

Let's add runtime_suspend and resume functions and atomic enabled
flag. This way we can use these when converting to use cpuidle
for saving and restoring device context.

And we need to maintain the driver state in the driver as documented
in "9. Autosuspend, or automatically-delayed suspends" in the
Documentation/power/runtime_pm.rst document related to using driver
private lock and races with runtime_suspend().

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
---
 drivers/clocksource/timer-ti-dm.c | 36 ++++++++++++++++++++++++++-----
 include/clocksource/timer-ti-dm.h |  1 +
 2 files changed, 32 insertions(+), 5 deletions(-)

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index bf132d321ecc..dae91969018d 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -460,7 +460,7 @@ __u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
 
 int omap_dm_timer_trigger(struct omap_dm_timer *timer)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+	if (unlikely(!timer || !atomic_read(&timer->enabled))) {
 		pr_err("%s: timer not available or enabled.\n", __func__);
 		return -EINVAL;
 	}
@@ -659,7 +659,7 @@ static unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
 {
 	unsigned int l;
 
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+	if (unlikely(!timer || !atomic_read(&timer->enabled))) {
 		pr_err("%s: timer not available or enabled.\n", __func__);
 		return 0;
 	}
@@ -671,7 +671,7 @@ static unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
 
 static int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev)))
+	if (unlikely(!timer || !atomic_read(&timer->enabled)))
 		return -EINVAL;
 
 	__omap_dm_timer_write_status(timer, value);
@@ -681,7 +681,7 @@ static int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int
 
 static unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+	if (unlikely(!timer || !atomic_read(&timer->enabled))) {
 		pr_err("%s: timer not iavailable or enabled.\n", __func__);
 		return 0;
 	}
@@ -691,7 +691,7 @@ static unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
 
 static int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+	if (unlikely(!timer || !atomic_read(&timer->enabled))) {
 		pr_err("%s: timer not available or enabled.\n", __func__);
 		return -EINVAL;
 	}
@@ -719,6 +719,29 @@ int omap_dm_timers_active(void)
 	return 0;
 }
 
+static int __maybe_unused omap_dm_timer_runtime_suspend(struct device *dev)
+{
+	struct omap_dm_timer *timer = dev_get_drvdata(dev);
+
+	atomic_set(&timer->enabled, 0);
+
+	return 0;
+}
+
+static int __maybe_unused omap_dm_timer_runtime_resume(struct device *dev)
+{
+	struct omap_dm_timer *timer = dev_get_drvdata(dev);
+
+	atomic_set(&timer->enabled, 1);
+
+	return 0;
+}
+
+static const struct dev_pm_ops omap_dm_timer_pm_ops = {
+	SET_RUNTIME_PM_OPS(omap_dm_timer_runtime_suspend,
+			   omap_dm_timer_runtime_resume, NULL)
+};
+
 static const struct of_device_id omap_timer_match[];
 
 /**
@@ -760,6 +783,8 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 	if (IS_ERR(timer->io_base))
 		return PTR_ERR(timer->io_base);
 
+	platform_set_drvdata(pdev, timer);
+
 	if (dev->of_node) {
 		if (of_find_property(dev->of_node, "ti,timer-alwon", NULL))
 			timer->capability |= OMAP_TIMER_ALWON;
@@ -905,6 +930,7 @@ static struct platform_driver omap_dm_timer_driver = {
 	.driver = {
 		.name   = "omap_timer",
 		.of_match_table = of_match_ptr(omap_timer_match),
+		.pm = &omap_dm_timer_pm_ops,
 	},
 };
 
diff --git a/include/clocksource/timer-ti-dm.h b/include/clocksource/timer-ti-dm.h
index 7d9598dc578d..eef5de300731 100644
--- a/include/clocksource/timer-ti-dm.h
+++ b/include/clocksource/timer-ti-dm.h
@@ -105,6 +105,7 @@ struct omap_dm_timer {
 	void __iomem	*pend;		/* write pending */
 	void __iomem	*func_base;	/* function register base */
 
+	atomic_t enabled;
 	unsigned long rate;
 	unsigned reserved:1;
 	unsigned posted:1;
-- 
2.23.0

[PATCH v3 3/6] clocksource: timer-ti-dm: Implement cpu_pm notifier for context save and restore

[Lokesh Vutla]

omap_dm_timer_enable() restores the entire context(including counter)
based on 2 conditions:
- If get_context_loss_count is populated and context is lost.
- If get_context_loss_count is not populated update unconditionally.

Case2 has a side effect of updating the counter register even though
context is not lost. When timer is configured in pwm mode, this is
causing undesired behaviour in the pwm period.

Instead of using get_context_loss_count call back, implement cpu_pm
notifier with context save and restore support. And delete the
get_context_loss_count callback all together.

Suggested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
[tony@atomide.com: removed pm_runtime calls from cpuidle calls]
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 drivers/clocksource/timer-ti-dm.c | 99 ++++++++++++++++++-------------
 include/clocksource/timer-ti-dm.h |  3 +-
 2 files changed, 60 insertions(+), 42 deletions(-)

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index dae91969018d..e6b6123ec567 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -20,6 +20,7 @@
 
 #include <linux/clk.h>
 #include <linux/clk-provider.h>
+#include <linux/cpu_pm.h>
 #include <linux/module.h>
 #include <linux/io.h>
 #include <linux/device.h>
@@ -92,6 +93,47 @@ static void omap_timer_restore_context(struct omap_dm_timer *timer)
 				timer->context.tclr);
 }
 
+static void omap_timer_save_context(struct omap_dm_timer *timer)
+{
+	timer->context.tclr =
+			omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+	timer->context.twer =
+			omap_dm_timer_read_reg(timer, OMAP_TIMER_WAKEUP_EN_REG);
+	timer->context.tldr =
+			omap_dm_timer_read_reg(timer, OMAP_TIMER_LOAD_REG);
+	timer->context.tmar =
+			omap_dm_timer_read_reg(timer, OMAP_TIMER_MATCH_REG);
+	timer->context.tier = readl_relaxed(timer->irq_ena);
+	timer->context.tsicr =
+			omap_dm_timer_read_reg(timer, OMAP_TIMER_IF_CTRL_REG);
+}
+
+static int omap_timer_context_notifier(struct notifier_block *nb,
+				       unsigned long cmd, void *v)
+{
+	struct omap_dm_timer *timer;
+
+	timer = container_of(nb, struct omap_dm_timer, nb);
+
+	switch (cmd) {
+	case CPU_CLUSTER_PM_ENTER:
+		if ((timer->capability & OMAP_TIMER_ALWON) ||
+		    !atomic_read(&timer->enabled))
+			break;
+		omap_timer_save_context(timer);
+		break;
+	case CPU_CLUSTER_PM_ENTER_FAILED:
+	case CPU_CLUSTER_PM_EXIT:
+		if ((timer->capability & OMAP_TIMER_ALWON) ||
+		    !atomic_read(&timer->enabled))
+			break;
+		omap_timer_restore_context(timer);
+		break;
+	}
+
+	return NOTIFY_OK;
+}
+
 static int omap_dm_timer_reset(struct omap_dm_timer *timer)
 {
 	u32 l, timeout = 100000;
@@ -179,21 +221,7 @@ static int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
 
 static void omap_dm_timer_enable(struct omap_dm_timer *timer)
 {
-	int c;
-
 	pm_runtime_get_sync(&timer->pdev->dev);
-
-	if (!(timer->capability & OMAP_TIMER_ALWON)) {
-		if (timer->get_context_loss_count) {
-			c = timer->get_context_loss_count(&timer->pdev->dev);
-			if (c != timer->ctx_loss_count) {
-				omap_timer_restore_context(timer);
-				timer->ctx_loss_count = c;
-			}
-		} else {
-			omap_timer_restore_context(timer);
-		}
-	}
 }
 
 static void omap_dm_timer_disable(struct omap_dm_timer *timer)
@@ -484,8 +512,6 @@ static int omap_dm_timer_start(struct omap_dm_timer *timer)
 		omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 	}
 
-	/* Save the context */
-	timer->context.tclr = l;
 	return 0;
 }
 
@@ -501,13 +527,6 @@ static int omap_dm_timer_stop(struct omap_dm_timer *timer)
 
 	__omap_dm_timer_stop(timer, timer->posted, rate);
 
-	/*
-	 * Since the register values are computed and written within
-	 * __omap_dm_timer_stop, we need to use read to retrieve the
-	 * context.
-	 */
-	timer->context.tclr =
-			omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -530,9 +549,6 @@ static int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
 
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
-	/* Save the context */
-	timer->context.tclr = l;
-	timer->context.tldr = load;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -554,9 +570,6 @@ static int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 
-	/* Save the context */
-	timer->context.tclr = l;
-	timer->context.tmar = match;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -580,8 +593,6 @@ static int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
 	l |= trigger << 10;
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 
-	/* Save the context */
-	timer->context.tclr = l;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -603,8 +614,6 @@ static int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer,
 	}
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 
-	/* Save the context */
-	timer->context.tclr = l;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -618,9 +627,6 @@ static int omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,
 	omap_dm_timer_enable(timer);
 	__omap_dm_timer_int_enable(timer, value);
 
-	/* Save the context */
-	timer->context.tier = value;
-	timer->context.twer = value;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -648,9 +654,6 @@ static int omap_dm_timer_set_int_disable(struct omap_dm_timer *timer, u32 mask)
 	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_WAKEUP_EN_REG) & ~mask;
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG, l);
 
-	/* Save the context */
-	timer->context.tier &= ~mask;
-	timer->context.twer &= ~mask;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -725,6 +728,12 @@ static int __maybe_unused omap_dm_timer_runtime_suspend(struct device *dev)
 
 	atomic_set(&timer->enabled, 0);
 
+	if (timer->capability & OMAP_TIMER_ALWON ||
+	    !timer->func_base)
+	    return 0;
+
+	omap_timer_save_context(timer);
+
 	return 0;
 }
 
@@ -732,6 +741,10 @@ static int __maybe_unused omap_dm_timer_runtime_resume(struct device *dev)
 {
 	struct omap_dm_timer *timer = dev_get_drvdata(dev);
 
+	if (!(timer->capability & OMAP_TIMER_ALWON) &&
+	    timer->func_base)
+		omap_timer_restore_context(timer);
+
 	atomic_set(&timer->enabled, 1);
 
 	return 0;
@@ -798,7 +811,11 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 		timer->id = pdev->id;
 		timer->capability = pdata->timer_capability;
 		timer->reserved = omap_dm_timer_reserved_systimer(timer->id);
-		timer->get_context_loss_count = pdata->get_context_loss_count;
+	}
+
+	if (!(timer->capability & OMAP_TIMER_ALWON)) {
+		timer->nb.notifier_call = omap_timer_context_notifier;
+		cpu_pm_register_notifier(&timer->nb);
 	}
 
 	if (pdata)
@@ -852,6 +869,8 @@ static int omap_dm_timer_remove(struct platform_device *pdev)
 	list_for_each_entry(timer, &omap_timer_list, node)
 		if (!strcmp(dev_name(&timer->pdev->dev),
 			    dev_name(&pdev->dev))) {
+			if (!(timer->capability & OMAP_TIMER_ALWON))
+				cpu_pm_unregister_notifier(&timer->nb);
 			list_del(&timer->node);
 			ret = 0;
 			break;
diff --git a/include/clocksource/timer-ti-dm.h b/include/clocksource/timer-ti-dm.h
index eef5de300731..25f05235866e 100644
--- a/include/clocksource/timer-ti-dm.h
+++ b/include/clocksource/timer-ti-dm.h
@@ -110,13 +110,12 @@ struct omap_dm_timer {
 	unsigned reserved:1;
 	unsigned posted:1;
 	struct timer_regs context;
-	int (*get_context_loss_count)(struct device *);
-	int ctx_loss_count;
 	int revision;
 	u32 capability;
 	u32 errata;
 	struct platform_device *pdev;
 	struct list_head node;
+	struct notifier_block nb;
 };
 
 int omap_dm_timer_reserve_systimer(int id);
-- 
2.23.0

Re: [PATCH v3 3/6] clocksource: timer-ti-dm: Implement cpu_pm notifier for context save and restore

[Daniel Lezcano]

On 05/03/2020 09:27, Lokesh Vutla wrote:
> omap_dm_timer_enable() restores the entire context(including counter)
> based on 2 conditions:
> - If get_context_loss_count is populated and context is lost.
> - If get_context_loss_count is not populated update unconditionally.
> 
> Case2 has a side effect of updating the counter register even though
> context is not lost. When timer is configured in pwm mode, this is
> causing undesired behaviour in the pwm period.
> 
> Instead of using get_context_loss_count call back, implement cpu_pm
> notifier with context save and restore support. And delete the
> get_context_loss_count callback all together.
> 
> Suggested-by: Tony Lindgren <tony@atomide.com>
> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
> [tony@atomide.com: removed pm_runtime calls from cpuidle calls]
> Signed-off-by: Tony Lindgren <tony@atomide.com>
> ---

[ ... ]

> @@ -725,6 +728,12 @@ static int __maybe_unused omap_dm_timer_runtime_suspend(struct device *dev)
>  
>  	atomic_set(&timer->enabled, 0);
>  
> +	if (timer->capability & OMAP_TIMER_ALWON ||
> +	    !timer->func_base)
> +	    return 0;

WARNING: suspect code indent for conditional statements (8, 12)
#168: FILE: drivers/clocksource/timer-ti-dm.c:762:
+	if (timer->capability & OMAP_TIMER_ALWON ||
[...]
+	    return 0;


WARNING: Statements should start on a tabstop
#170: FILE: drivers/clocksource/timer-ti-dm.c:764:
+	    return 0;

[ ... ]


Mind to resend this patch with the warning fixed?

Thanks

  -- Daniel

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[PATCH v4 3/6] clocksource: timer-ti-dm: Implement cpu_pm notifier for context save and restore

[Lokesh Vutla]

omap_dm_timer_enable() restores the entire context(including counter)
based on 2 conditions:
- If get_context_loss_count is populated and context is lost.
- If get_context_loss_count is not populated update unconditionally.

Case2 has a side effect of updating the counter register even though
context is not lost. When timer is configured in pwm mode, this is
causing undesired behaviour in the pwm period.

Instead of using get_context_loss_count call back, implement cpu_pm
notifier with context save and restore support. And delete the
get_context_loss_count callback all together.

Suggested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
[tony@atomide.com: removed pm_runtime calls from cpuidle calls]
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
Changes since v3:
- Fixed checkpatch warnings.

 drivers/clocksource/timer-ti-dm.c | 97 ++++++++++++++++++-------------
 include/clocksource/timer-ti-dm.h |  3 +-
 2 files changed, 58 insertions(+), 42 deletions(-)

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index dae91969018d..cf4f30df99c2 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -20,6 +20,7 @@
 
 #include <linux/clk.h>
 #include <linux/clk-provider.h>
+#include <linux/cpu_pm.h>
 #include <linux/module.h>
 #include <linux/io.h>
 #include <linux/device.h>
@@ -92,6 +93,47 @@ static void omap_timer_restore_context(struct omap_dm_timer *timer)
 				timer->context.tclr);
 }
 
+static void omap_timer_save_context(struct omap_dm_timer *timer)
+{
+	timer->context.tclr =
+			omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+	timer->context.twer =
+			omap_dm_timer_read_reg(timer, OMAP_TIMER_WAKEUP_EN_REG);
+	timer->context.tldr =
+			omap_dm_timer_read_reg(timer, OMAP_TIMER_LOAD_REG);
+	timer->context.tmar =
+			omap_dm_timer_read_reg(timer, OMAP_TIMER_MATCH_REG);
+	timer->context.tier = readl_relaxed(timer->irq_ena);
+	timer->context.tsicr =
+			omap_dm_timer_read_reg(timer, OMAP_TIMER_IF_CTRL_REG);
+}
+
+static int omap_timer_context_notifier(struct notifier_block *nb,
+				       unsigned long cmd, void *v)
+{
+	struct omap_dm_timer *timer;
+
+	timer = container_of(nb, struct omap_dm_timer, nb);
+
+	switch (cmd) {
+	case CPU_CLUSTER_PM_ENTER:
+		if ((timer->capability & OMAP_TIMER_ALWON) ||
+		    !atomic_read(&timer->enabled))
+			break;
+		omap_timer_save_context(timer);
+		break;
+	case CPU_CLUSTER_PM_ENTER_FAILED:
+	case CPU_CLUSTER_PM_EXIT:
+		if ((timer->capability & OMAP_TIMER_ALWON) ||
+		    !atomic_read(&timer->enabled))
+			break;
+		omap_timer_restore_context(timer);
+		break;
+	}
+
+	return NOTIFY_OK;
+}
+
 static int omap_dm_timer_reset(struct omap_dm_timer *timer)
 {
 	u32 l, timeout = 100000;
@@ -179,21 +221,7 @@ static int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
 
 static void omap_dm_timer_enable(struct omap_dm_timer *timer)
 {
-	int c;
-
 	pm_runtime_get_sync(&timer->pdev->dev);
-
-	if (!(timer->capability & OMAP_TIMER_ALWON)) {
-		if (timer->get_context_loss_count) {
-			c = timer->get_context_loss_count(&timer->pdev->dev);
-			if (c != timer->ctx_loss_count) {
-				omap_timer_restore_context(timer);
-				timer->ctx_loss_count = c;
-			}
-		} else {
-			omap_timer_restore_context(timer);
-		}
-	}
 }
 
 static void omap_dm_timer_disable(struct omap_dm_timer *timer)
@@ -484,8 +512,6 @@ static int omap_dm_timer_start(struct omap_dm_timer *timer)
 		omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 	}
 
-	/* Save the context */
-	timer->context.tclr = l;
 	return 0;
 }
 
@@ -501,13 +527,6 @@ static int omap_dm_timer_stop(struct omap_dm_timer *timer)
 
 	__omap_dm_timer_stop(timer, timer->posted, rate);
 
-	/*
-	 * Since the register values are computed and written within
-	 * __omap_dm_timer_stop, we need to use read to retrieve the
-	 * context.
-	 */
-	timer->context.tclr =
-			omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -530,9 +549,6 @@ static int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
 
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
-	/* Save the context */
-	timer->context.tclr = l;
-	timer->context.tldr = load;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -554,9 +570,6 @@ static int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 
-	/* Save the context */
-	timer->context.tclr = l;
-	timer->context.tmar = match;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -580,8 +593,6 @@ static int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
 	l |= trigger << 10;
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 
-	/* Save the context */
-	timer->context.tclr = l;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -603,8 +614,6 @@ static int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer,
 	}
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 
-	/* Save the context */
-	timer->context.tclr = l;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -618,9 +627,6 @@ static int omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,
 	omap_dm_timer_enable(timer);
 	__omap_dm_timer_int_enable(timer, value);
 
-	/* Save the context */
-	timer->context.tier = value;
-	timer->context.twer = value;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -648,9 +654,6 @@ static int omap_dm_timer_set_int_disable(struct omap_dm_timer *timer, u32 mask)
 	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_WAKEUP_EN_REG) & ~mask;
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG, l);
 
-	/* Save the context */
-	timer->context.tier &= ~mask;
-	timer->context.twer &= ~mask;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -725,6 +728,11 @@ static int __maybe_unused omap_dm_timer_runtime_suspend(struct device *dev)
 
 	atomic_set(&timer->enabled, 0);
 
+	if (timer->capability & OMAP_TIMER_ALWON || !timer->func_base)
+		return 0;
+
+	omap_timer_save_context(timer);
+
 	return 0;
 }
 
@@ -732,6 +740,9 @@ static int __maybe_unused omap_dm_timer_runtime_resume(struct device *dev)
 {
 	struct omap_dm_timer *timer = dev_get_drvdata(dev);
 
+	if (!(timer->capability & OMAP_TIMER_ALWON) && timer->func_base)
+		omap_timer_restore_context(timer);
+
 	atomic_set(&timer->enabled, 1);
 
 	return 0;
@@ -798,7 +809,11 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 		timer->id = pdev->id;
 		timer->capability = pdata->timer_capability;
 		timer->reserved = omap_dm_timer_reserved_systimer(timer->id);
-		timer->get_context_loss_count = pdata->get_context_loss_count;
+	}
+
+	if (!(timer->capability & OMAP_TIMER_ALWON)) {
+		timer->nb.notifier_call = omap_timer_context_notifier;
+		cpu_pm_register_notifier(&timer->nb);
 	}
 
 	if (pdata)
@@ -852,6 +867,8 @@ static int omap_dm_timer_remove(struct platform_device *pdev)
 	list_for_each_entry(timer, &omap_timer_list, node)
 		if (!strcmp(dev_name(&timer->pdev->dev),
 			    dev_name(&pdev->dev))) {
+			if (!(timer->capability & OMAP_TIMER_ALWON))
+				cpu_pm_unregister_notifier(&timer->nb);
 			list_del(&timer->node);
 			ret = 0;
 			break;
diff --git a/include/clocksource/timer-ti-dm.h b/include/clocksource/timer-ti-dm.h
index eef5de300731..25f05235866e 100644
--- a/include/clocksource/timer-ti-dm.h
+++ b/include/clocksource/timer-ti-dm.h
@@ -110,13 +110,12 @@ struct omap_dm_timer {
 	unsigned reserved:1;
 	unsigned posted:1;
 	struct timer_regs context;
-	int (*get_context_loss_count)(struct device *);
-	int ctx_loss_count;
 	int revision;
 	u32 capability;
 	u32 errata;
 	struct platform_device *pdev;
 	struct list_head node;
+	struct notifier_block nb;
 };
 
 int omap_dm_timer_reserve_systimer(int id);
-- 
2.23.0

[PATCH v3 4/6] clocksource: timer-ti-dm: Do not update counter on updating the period

[Lokesh Vutla]

Write to trigger register(OMAP_TIMER_TRIGGER_REG) will load the value
in Load register(OMAP_TIMER_LOAD_REG) into Counter register
(OMAP_TIMER_COUNTER_REG).

omap_dm_timer_set_load() writes into trigger register every time load
register is updated. When timer is configured in pwm mode, this causes
disruption in current pwm cycle, which is not expected especially when
pwm is used as PPS signal for synchronized PTP clocks. So do not write
into trigger register on updating the period.

Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
---
 drivers/clocksource/timer-ti-dm.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index e6b6123ec567..8f6d477d2078 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -548,7 +548,6 @@ static int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
 
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
 	omap_dm_timer_disable(timer);
 	return 0;
 }
-- 
2.23.0

[PATCH v3 5/6] clocksource: timer-ti-dm: Add support to get pwm current status

[Lokesh Vutla]

omap_dm_timer_ops provide support to configure the pwm but there is no
support to get the current status. For configuring pwm it is advised to
check the current hw status instead of relying on pwm framework. So
implement a new timer ops to get the current status of pwm.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
---
 drivers/clocksource/timer-ti-dm.c          | 15 +++++++++++++++
 include/linux/platform_data/dmtimer-omap.h |  1 +
 2 files changed, 16 insertions(+)

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index 8f6d477d2078..10e1d08bfc4c 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -596,6 +596,20 @@ static int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
 	return 0;
 }
 
+static int omap_dm_timer_get_pwm_status(struct omap_dm_timer *timer)
+{
+	u32 l;
+
+	if (unlikely(!timer))
+		return -EINVAL;
+
+	omap_dm_timer_enable(timer);
+	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+	omap_dm_timer_disable(timer);
+
+	return l;
+}
+
 static int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer,
 					int prescaler)
 {
@@ -898,6 +912,7 @@ static const struct omap_dm_timer_ops dmtimer_ops = {
 	.set_load = omap_dm_timer_set_load,
 	.set_match = omap_dm_timer_set_match,
 	.set_pwm = omap_dm_timer_set_pwm,
+	.get_pwm_status = omap_dm_timer_get_pwm_status,
 	.set_prescaler = omap_dm_timer_set_prescaler,
 	.read_counter = omap_dm_timer_read_counter,
 	.write_counter = omap_dm_timer_write_counter,
diff --git a/include/linux/platform_data/dmtimer-omap.h b/include/linux/platform_data/dmtimer-omap.h
index bdaaf537604a..3173b7b6ff6f 100644
--- a/include/linux/platform_data/dmtimer-omap.h
+++ b/include/linux/platform_data/dmtimer-omap.h
@@ -36,6 +36,7 @@ struct omap_dm_timer_ops {
 			     unsigned int match);
 	int	(*set_pwm)(struct omap_dm_timer *timer, int def_on,
 			   int toggle, int trigger);
+	int	(*get_pwm_status)(struct omap_dm_timer *timer);
 	int	(*set_prescaler)(struct omap_dm_timer *timer, int prescaler);
 
 	unsigned int (*read_counter)(struct omap_dm_timer *timer);
-- 
2.23.0

Re: [PATCH v3 5/6] clocksource: timer-ti-dm: Add support to get pwm current status

[Tony Lindgren]

* Lokesh Vutla <lokeshvutla@ti.com> [200305 08:29]:
> omap_dm_timer_ops provide support to configure the pwm but there is no
> support to get the current status. For configuring pwm it is advised to
> check the current hw status instead of relying on pwm framework. So
> implement a new timer ops to get the current status of pwm.

Acked-by: Tony Lindgen <tony@atomide.com>

[PATCH v3 6/6] clocksource: timer-ti-dm: Enable autoreload in set_pwm

[Lokesh Vutla]

dm timer ops set_load() api allows to configure the load value and to
set the auto reload feature. But auto reload feature is independent of
load value and should be part of configuring pwm. This way pwm can be
disabled by disabling auto reload feature using set_pwm() so that the
current pwm cycle will be completed. Else pwm disabling causes the
cycle to be stopped abruptly.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
---
 drivers/clocksource/timer-ti-dm.c          | 16 +++++-----------
 drivers/pwm/pwm-omap-dmtimer.c             |  8 +++++---
 include/linux/platform_data/dmtimer-omap.h |  5 ++---
 3 files changed, 12 insertions(+), 17 deletions(-)

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index 10e1d08bfc4c..1f210ef60b22 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -531,21 +531,13 @@ static int omap_dm_timer_stop(struct omap_dm_timer *timer)
 	return 0;
 }
 
-static int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
+static int omap_dm_timer_set_load(struct omap_dm_timer *timer,
 				  unsigned int load)
 {
-	u32 l;
-
 	if (unlikely(!timer))
 		return -EINVAL;
 
 	omap_dm_timer_enable(timer);
-	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
-	if (autoreload)
-		l |= OMAP_TIMER_CTRL_AR;
-	else
-		l &= ~OMAP_TIMER_CTRL_AR;
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
 
 	omap_dm_timer_disable(timer);
@@ -574,7 +566,7 @@ static int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
 }
 
 static int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
-				 int toggle, int trigger)
+				 int toggle, int trigger, int autoreload)
 {
 	u32 l;
 
@@ -584,12 +576,14 @@ static int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
 	omap_dm_timer_enable(timer);
 	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
 	l &= ~(OMAP_TIMER_CTRL_GPOCFG | OMAP_TIMER_CTRL_SCPWM |
-	       OMAP_TIMER_CTRL_PT | (0x03 << 10));
+	       OMAP_TIMER_CTRL_PT | (0x03 << 10) | OMAP_TIMER_CTRL_AR);
 	if (def_on)
 		l |= OMAP_TIMER_CTRL_SCPWM;
 	if (toggle)
 		l |= OMAP_TIMER_CTRL_PT;
 	l |= trigger << 10;
+	if (autoreload)
+		l |= OMAP_TIMER_CTRL_AR;
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 
 	omap_dm_timer_disable(timer);
diff --git a/drivers/pwm/pwm-omap-dmtimer.c b/drivers/pwm/pwm-omap-dmtimer.c
index 88a3c5690fea..9e4378dc6897 100644
--- a/drivers/pwm/pwm-omap-dmtimer.c
+++ b/drivers/pwm/pwm-omap-dmtimer.c
@@ -183,7 +183,7 @@ static int pwm_omap_dmtimer_config(struct pwm_chip *chip,
 	if (timer_active)
 		omap->pdata->stop(omap->dm_timer);
 
-	omap->pdata->set_load(omap->dm_timer, true, load_value);
+	omap->pdata->set_load(omap->dm_timer, load_value);
 	omap->pdata->set_match(omap->dm_timer, true, match_value);
 
 	dev_dbg(chip->dev, "load value: %#08x (%d), match value: %#08x (%d)\n",
@@ -192,7 +192,8 @@ static int pwm_omap_dmtimer_config(struct pwm_chip *chip,
 	omap->pdata->set_pwm(omap->dm_timer,
 			      pwm_get_polarity(pwm) == PWM_POLARITY_INVERSED,
 			      true,
-			      PWM_OMAP_DMTIMER_TRIGGER_OVERFLOW_AND_COMPARE);
+			      PWM_OMAP_DMTIMER_TRIGGER_OVERFLOW_AND_COMPARE,
+			      true);
 
 	/* If config was called while timer was running it must be reenabled. */
 	if (timer_active)
@@ -222,7 +223,8 @@ static int pwm_omap_dmtimer_set_polarity(struct pwm_chip *chip,
 	omap->pdata->set_pwm(omap->dm_timer,
 			      polarity == PWM_POLARITY_INVERSED,
 			      true,
-			      PWM_OMAP_DMTIMER_TRIGGER_OVERFLOW_AND_COMPARE);
+			      PWM_OMAP_DMTIMER_TRIGGER_OVERFLOW_AND_COMPARE,
+			      true);
 	mutex_unlock(&omap->mutex);
 
 	return 0;
diff --git a/include/linux/platform_data/dmtimer-omap.h b/include/linux/platform_data/dmtimer-omap.h
index 3173b7b6ff6f..95d852aef130 100644
--- a/include/linux/platform_data/dmtimer-omap.h
+++ b/include/linux/platform_data/dmtimer-omap.h
@@ -30,12 +30,11 @@ struct omap_dm_timer_ops {
 	int	(*stop)(struct omap_dm_timer *timer);
 	int	(*set_source)(struct omap_dm_timer *timer, int source);
 
-	int	(*set_load)(struct omap_dm_timer *timer, int autoreload,
-			    unsigned int value);
+	int	(*set_load)(struct omap_dm_timer *timer, unsigned int value);
 	int	(*set_match)(struct omap_dm_timer *timer, int enable,
 			     unsigned int match);
 	int	(*set_pwm)(struct omap_dm_timer *timer, int def_on,
-			   int toggle, int trigger);
+			   int toggle, int trigger, int autoreload);
 	int	(*get_pwm_status)(struct omap_dm_timer *timer);
 	int	(*set_prescaler)(struct omap_dm_timer *timer, int prescaler);
 
-- 
2.23.0

Re: [PATCH v3 6/6] clocksource: timer-ti-dm: Enable autoreload in set_pwm

[Tony Lindgren]

* Lokesh Vutla <lokeshvutla@ti.com> [200305 08:29]:
> dm timer ops set_load() api allows to configure the load value and to
> set the auto reload feature. But auto reload feature is independent of
> load value and should be part of configuring pwm. This way pwm can be
> disabled by disabling auto reload feature using set_pwm() so that the
> current pwm cycle will be completed. Else pwm disabling causes the
> cycle to be stopped abruptly.

Acked-by: Tony Lindgren <tony@atomide.com>

Re: [PATCH v3 6/6] clocksource: timer-ti-dm: Enable autoreload in set_pwm

[Thierry Reding]

[-- Attachment #1: Type: text/plain, Size: 820 bytes --]

On Thu, Mar 05, 2020 at 01:57:15PM +0530, Lokesh Vutla wrote:
> dm timer ops set_load() api allows to configure the load value and to
> set the auto reload feature. But auto reload feature is independent of
> load value and should be part of configuring pwm. This way pwm can be
> disabled by disabling auto reload feature using set_pwm() so that the
> current pwm cycle will be completed. Else pwm disabling causes the
> cycle to be stopped abruptly.
> 
> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
> ---
>  drivers/clocksource/timer-ti-dm.c          | 16 +++++-----------
>  drivers/pwm/pwm-omap-dmtimer.c             |  8 +++++---
>  include/linux/platform_data/dmtimer-omap.h |  5 ++---
>  3 files changed, 12 insertions(+), 17 deletions(-)

Acked-by: Thierry Reding <thierry.reding@gmail.com>

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

Re: [PATCH v3 0/6] clocksource: timer-ti-dm: Prepare for dynamic pwm period updates

[Tony Lindgren]

* Lokesh Vutla <lokeshvutla@ti.com> [200305 08:29]:
> This series fixes dm_timer_ops used for enabling the pwm and enables
> cpu_pm notifier for context save and restore. This acts as a preparatory
> series for enabling dynamic period updates for pwm omap dm timer driver.
> 
> Changes since v2:
> - Incorporated changes from Tony

I just gave this series another try here and it still works
for me just fine and is good to go as far as I'm concerned.

Thanks for doing this.

Regards,

Tony

Re: [PATCH v3 0/6] clocksource: timer-ti-dm: Prepare for dynamic pwm period updates

[Daniel Lezcano]

On 06/03/2020 18:19, Tony Lindgren wrote:
> * Lokesh Vutla <lokeshvutla@ti.com> [200305 08:29]:
>> This series fixes dm_timer_ops used for enabling the pwm and enables
>> cpu_pm notifier for context save and restore. This acts as a preparatory
>> series for enabling dynamic period updates for pwm omap dm timer driver.
>>
>> Changes since v2:
>> - Incorporated changes from Tony
> 
> I just gave this series another try here and it still works
> for me just fine and is good to go as far as I'm concerned.

How do you want this series to be merged?

Shall I pick the patches falling under drivers/clocksource or ack them?

> Thanks for doing this.
> 
> Regards,
> 
> Tony
> 


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Re: [PATCH v3 0/6] clocksource: timer-ti-dm: Prepare for dynamic pwm period updates

[Tony Lindgren]

Hi,

* Daniel Lezcano <daniel.lezcano@linaro.org> [200312 11:11]:
> On 06/03/2020 18:19, Tony Lindgren wrote:
> > * Lokesh Vutla <lokeshvutla@ti.com> [200305 08:29]:
> >> This series fixes dm_timer_ops used for enabling the pwm and enables
> >> cpu_pm notifier for context save and restore. This acts as a preparatory
> >> series for enabling dynamic period updates for pwm omap dm timer driver.
> >>
> >> Changes since v2:
> >> - Incorporated changes from Tony
> > 
> > I just gave this series another try here and it still works
> > for me just fine and is good to go as far as I'm concerned.
> 
> How do you want this series to be merged?
> 
> Shall I pick the patches falling under drivers/clocksource or ack them?

I think best would be if you picked them and applied them into
an immutable branch against v5.6-rc1 that can also be merged
into pwm driver branch as needed.

Regards,

Tony

Re: [PATCH v3 0/6] clocksource: timer-ti-dm: Prepare for dynamic pwm period updates

[Daniel Lezcano]

Hi Tony,

On 12/03/2020 18:26, Tony Lindgren wrote:
> Hi,
> 
> * Daniel Lezcano <daniel.lezcano@linaro.org> [200312 11:11]:
>> On 06/03/2020 18:19, Tony Lindgren wrote:
>>> * Lokesh Vutla <lokeshvutla@ti.com> [200305 08:29]:
>>>> This series fixes dm_timer_ops used for enabling the pwm and enables
>>>> cpu_pm notifier for context save and restore. This acts as a preparatory
>>>> series for enabling dynamic period updates for pwm omap dm timer driver.
>>>>
>>>> Changes since v2:
>>>> - Incorporated changes from Tony
>>>
>>> I just gave this series another try here and it still works
>>> for me just fine and is good to go as far as I'm concerned.
>>
>> How do you want this series to be merged?
>>
>> Shall I pick the patches falling under drivers/clocksource or ack them?
> 
> I think best would be if you picked them and applied them into
> an immutable branch against v5.6-rc1 that can also be merged
> into pwm driver branch as needed.

Immutable branch based on v5.6-rc1:


https://git.linaro.org/people/dlezcano/linux.git/log/?h=timers/drivers/timer-ti-dm

and merged to timers/drivers/next:


https://git.linaro.org/people/dlezcano/linux.git/log/?h=timers/drivers/next

with a small conflict (fixed) with:


https://git.linaro.org/people/dlezcano/linux.git/commit/?h=timers/drivers/next&id=6ce4fcb015a1a1290ffafcf3554901b40f9322df

Regards

  -- Daniel

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