[PATCH 1/9] ARM: OMAP: dmtimer: Remove setting of clk parent indirectly through platform hook

[PATCH 1/9] ARM: OMAP: dmtimer: Remove setting of clk parent indirectly through platform hook

[Joel Fernandes]

There is a platform specific hook just for OMAP1 to set its clk parent.  Remove
this hook and have OMAP1 set its parent in omap1_dm_timer_init.  If OMAP1 is
ever migrated to clock framework, the correct way to do this would be through
clk_set_parent like other platforms.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/mach-omap1/timer.c                |    8 +++++++-
 arch/arm/plat-omap/dmtimer.c               |    8 +++-----
 include/linux/platform_data/dmtimer-omap.h |    2 --
 3 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/arch/arm/mach-omap1/timer.c b/arch/arm/mach-omap1/timer.c
index bde7a35..4b9c604 100644
--- a/arch/arm/mach-omap1/timer.c
+++ b/arch/arm/mach-omap1/timer.c
@@ -140,7 +140,13 @@ static int __init omap1_dm_timer_init(void)
 			goto err_free_pdata;
 		}
 
-		pdata->set_timer_src = omap1_dm_timer_set_src;
+		/*
+		 * Since OMAP1 doesn't support clock framework, set timer clock
+		 * source to 32KHz here instead of expecting it to be set by
+		 * dmtimer code.
+		 */
+		omap1_dm_timer_set_src(pdev, 0x01);
+
 		pdata->timer_capability = OMAP_TIMER_ALWON |
 				OMAP_TIMER_NEEDS_RESET | OMAP_TIMER_HAS_DSP_IRQ;
 
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 869254c..ecd3f97 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -494,12 +494,10 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
 		return -EINVAL;
 
 	/*
-	 * FIXME: Used for OMAP1 devices only because they do not currently
-	 * use the clock framework to set the parent clock. To be removed
-	 * once OMAP1 migrated to using clock framework for dmtimers
+	 * For OMAP1, timer source is already set during omap1_dm_timer_init.
 	 */
-	if (pdata && pdata->set_timer_src)
-		return pdata->set_timer_src(timer->pdev, source);
+	if (timer->capability & OMAP_TIMER_NEEDS_RESET)
+		return 0;
 
 	if (IS_ERR(timer->fclk))
 		return -EINVAL;
diff --git a/include/linux/platform_data/dmtimer-omap.h b/include/linux/platform_data/dmtimer-omap.h
index a19b78d..9f42b06 100644
--- a/include/linux/platform_data/dmtimer-omap.h
+++ b/include/linux/platform_data/dmtimer-omap.h
@@ -21,8 +21,6 @@
 #define __PLATFORM_DATA_DMTIMER_OMAP_H__
 
 struct dmtimer_platform_data {
-	/* set_timer_src - Only used for OMAP1 devices */
-	int (*set_timer_src)(struct platform_device *pdev, int source);
 	u32 timer_capability;
 	u32 timer_errata;
 	int (*get_context_loss_count)(struct device *);
-- 
1.7.9.5

[PATCH 1/9] ARM: OMAP: dmtimer: Remove setting of clk parent indirectly through platform hook

[Joel Fernandes]

There is a platform specific hook just for OMAP1 to set its clk parent.  Remove
this hook and have OMAP1 set its parent in omap1_dm_timer_init.  If OMAP1 is
ever migrated to clock framework, the correct way to do this would be through
clk_set_parent like other platforms.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/mach-omap1/timer.c                |    8 +++++++-
 arch/arm/plat-omap/dmtimer.c               |    8 +++-----
 include/linux/platform_data/dmtimer-omap.h |    2 --
 3 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/arch/arm/mach-omap1/timer.c b/arch/arm/mach-omap1/timer.c
index bde7a35..4b9c604 100644
--- a/arch/arm/mach-omap1/timer.c
+++ b/arch/arm/mach-omap1/timer.c
@@ -140,7 +140,13 @@ static int __init omap1_dm_timer_init(void)
 			goto err_free_pdata;
 		}
 
-		pdata->set_timer_src = omap1_dm_timer_set_src;
+		/*
+		 * Since OMAP1 doesn't support clock framework, set timer clock
+		 * source to 32KHz here instead of expecting it to be set by
+		 * dmtimer code.
+		 */
+		omap1_dm_timer_set_src(pdev, 0x01);
+
 		pdata->timer_capability = OMAP_TIMER_ALWON |
 				OMAP_TIMER_NEEDS_RESET | OMAP_TIMER_HAS_DSP_IRQ;
 
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 869254c..ecd3f97 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -494,12 +494,10 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
 		return -EINVAL;
 
 	/*
-	 * FIXME: Used for OMAP1 devices only because they do not currently
-	 * use the clock framework to set the parent clock. To be removed
-	 * once OMAP1 migrated to using clock framework for dmtimers
+	 * For OMAP1, timer source is already set during omap1_dm_timer_init.
 	 */
-	if (pdata && pdata->set_timer_src)
-		return pdata->set_timer_src(timer->pdev, source);
+	if (timer->capability & OMAP_TIMER_NEEDS_RESET)
+		return 0;
 
 	if (IS_ERR(timer->fclk))
 		return -EINVAL;
diff --git a/include/linux/platform_data/dmtimer-omap.h b/include/linux/platform_data/dmtimer-omap.h
index a19b78d..9f42b06 100644
--- a/include/linux/platform_data/dmtimer-omap.h
+++ b/include/linux/platform_data/dmtimer-omap.h
@@ -21,8 +21,6 @@
 #define __PLATFORM_DATA_DMTIMER_OMAP_H__
 
 struct dmtimer_platform_data {
-	/* set_timer_src - Only used for OMAP1 devices */
-	int (*set_timer_src)(struct platform_device *pdev, int source);
 	u32 timer_capability;
 	u32 timer_errata;
 	int (*get_context_loss_count)(struct device *);
-- 
1.7.9.5

[PATCH 1/9] ARM: OMAP: dmtimer: Remove setting of clk parent indirectly through platform hook

[Joel Fernandes]

There is a platform specific hook just for OMAP1 to set its clk parent.  Remove
this hook and have OMAP1 set its parent in omap1_dm_timer_init.  If OMAP1 is
ever migrated to clock framework, the correct way to do this would be through
clk_set_parent like other platforms.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/mach-omap1/timer.c                |    8 +++++++-
 arch/arm/plat-omap/dmtimer.c               |    8 +++-----
 include/linux/platform_data/dmtimer-omap.h |    2 --
 3 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/arch/arm/mach-omap1/timer.c b/arch/arm/mach-omap1/timer.c
index bde7a35..4b9c604 100644
--- a/arch/arm/mach-omap1/timer.c
+++ b/arch/arm/mach-omap1/timer.c
@@ -140,7 +140,13 @@ static int __init omap1_dm_timer_init(void)
 			goto err_free_pdata;
 		}
 
-		pdata->set_timer_src = omap1_dm_timer_set_src;
+		/*
+		 * Since OMAP1 doesn't support clock framework, set timer clock
+		 * source to 32KHz here instead of expecting it to be set by
+		 * dmtimer code.
+		 */
+		omap1_dm_timer_set_src(pdev, 0x01);
+
 		pdata->timer_capability = OMAP_TIMER_ALWON |
 				OMAP_TIMER_NEEDS_RESET | OMAP_TIMER_HAS_DSP_IRQ;
 
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 869254c..ecd3f97 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -494,12 +494,10 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
 		return -EINVAL;
 
 	/*
-	 * FIXME: Used for OMAP1 devices only because they do not currently
-	 * use the clock framework to set the parent clock. To be removed
-	 * once OMAP1 migrated to using clock framework for dmtimers
+	 * For OMAP1, timer source is already set during omap1_dm_timer_init.
 	 */
-	if (pdata && pdata->set_timer_src)
-		return pdata->set_timer_src(timer->pdev, source);
+	if (timer->capability & OMAP_TIMER_NEEDS_RESET)
+		return 0;
 
 	if (IS_ERR(timer->fclk))
 		return -EINVAL;
diff --git a/include/linux/platform_data/dmtimer-omap.h b/include/linux/platform_data/dmtimer-omap.h
index a19b78d..9f42b06 100644
--- a/include/linux/platform_data/dmtimer-omap.h
+++ b/include/linux/platform_data/dmtimer-omap.h
@@ -21,8 +21,6 @@
 #define __PLATFORM_DATA_DMTIMER_OMAP_H__
 
 struct dmtimer_platform_data {
-	/* set_timer_src - Only used for OMAP1 devices */
-	int (*set_timer_src)(struct platform_device *pdev, int source);
 	u32 timer_capability;
 	u32 timer_errata;
 	int (*get_context_loss_count)(struct device *);
-- 
1.7.9.5

[PATCH 2/9] ARM: OMAP: dmtimer: Add comments on OMAP1 clock framework

[Joel Fernandes]

OMAP1 doesn't support clock framework, add a comment where needed
and correct a FIXME.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index ecd3f97..f5a674c 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -142,8 +142,7 @@ static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
 	int rc;
 
 	/*
-	 * FIXME: OMAP1 devices do not use the clock framework for dmtimers so
-	 * do not call clk_get() for these devices.
+	 * Do not call clk_get() for OMAP1 due to no clock framework support.
 	 */
 	if (!(timer->capability & OMAP_TIMER_NEEDS_RESET)) {
 		timer->fclk = clk_get(&timer->pdev->dev, "fck");
@@ -461,6 +460,7 @@ int omap_dm_timer_stop(struct omap_dm_timer *timer)
 	if (unlikely(!timer))
 		return -EINVAL;
 
+	/* OMAP1 is not converted to clk framework so avoid clk_get_rate here */
 	if (!(timer->capability & OMAP_TIMER_NEEDS_RESET))
 		rate = clk_get_rate(timer->fclk);
 
-- 
1.7.9.5

[PATCH 2/9] ARM: OMAP: dmtimer: Add comments on OMAP1 clock framework

[Joel Fernandes]

OMAP1 doesn't support clock framework, add a comment where needed
and correct a FIXME.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index ecd3f97..f5a674c 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -142,8 +142,7 @@ static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
 	int rc;
 
 	/*
-	 * FIXME: OMAP1 devices do not use the clock framework for dmtimers so
-	 * do not call clk_get() for these devices.
+	 * Do not call clk_get() for OMAP1 due to no clock framework support.
 	 */
 	if (!(timer->capability & OMAP_TIMER_NEEDS_RESET)) {
 		timer->fclk = clk_get(&timer->pdev->dev, "fck");
@@ -461,6 +460,7 @@ int omap_dm_timer_stop(struct omap_dm_timer *timer)
 	if (unlikely(!timer))
 		return -EINVAL;
 
+	/* OMAP1 is not converted to clk framework so avoid clk_get_rate here */
 	if (!(timer->capability & OMAP_TIMER_NEEDS_RESET))
 		rate = clk_get_rate(timer->fclk);
 
-- 
1.7.9.5

[PATCH 2/9] ARM: OMAP: dmtimer: Add comments on OMAP1 clock framework

[Joel Fernandes]

OMAP1 doesn't support clock framework, add a comment where needed
and correct a FIXME.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index ecd3f97..f5a674c 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -142,8 +142,7 @@ static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
 	int rc;
 
 	/*
-	 * FIXME: OMAP1 devices do not use the clock framework for dmtimers so
-	 * do not call clk_get() for these devices.
+	 * Do not call clk_get() for OMAP1 due to no clock framework support.
 	 */
 	if (!(timer->capability & OMAP_TIMER_NEEDS_RESET)) {
 		timer->fclk = clk_get(&timer->pdev->dev, "fck");
@@ -461,6 +460,7 @@ int omap_dm_timer_stop(struct omap_dm_timer *timer)
 	if (unlikely(!timer))
 		return -EINVAL;
 
+	/* OMAP1 is not converted to clk framework so avoid clk_get_rate here */
 	if (!(timer->capability & OMAP_TIMER_NEEDS_RESET))
 		rate = clk_get_rate(timer->fclk);
 
-- 
1.7.9.5

[PATCH 3/9] ARM: OMAP: dmtimer: Add note to set parent from DT

[Joel Fernandes]

Once clock-parents or default-parent support for DT clocks is available,
we should use it to set clock parent and turn clk_set_parent into a NOOP.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index f5a674c..4debb3d 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -165,6 +165,10 @@ static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
 	__omap_dm_timer_enable_posted(timer);
 	omap_dm_timer_disable(timer);
 
+	/*
+	 * FIXME: Once DT clock-parents or set-parents support is upstream,
+	 * this is to become a NOOP.
+	 */
 	return omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
 }
 
-- 
1.7.9.5

[PATCH 3/9] ARM: OMAP: dmtimer: Add note to set parent from DT

[Joel Fernandes]

Once clock-parents or default-parent support for DT clocks is available,
we should use it to set clock parent and turn clk_set_parent into a NOOP.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index f5a674c..4debb3d 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -165,6 +165,10 @@ static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
 	__omap_dm_timer_enable_posted(timer);
 	omap_dm_timer_disable(timer);
 
+	/*
+	 * FIXME: Once DT clock-parents or set-parents support is upstream,
+	 * this is to become a NOOP.
+	 */
 	return omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
 }
 
-- 
1.7.9.5

[PATCH 3/9] ARM: OMAP: dmtimer: Add note to set parent from DT

[Joel Fernandes]

Once clock-parents or default-parent support for DT clocks is available,
we should use it to set clock parent and turn clk_set_parent into a NOOP.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index f5a674c..4debb3d 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -165,6 +165,10 @@ static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
 	__omap_dm_timer_enable_posted(timer);
 	omap_dm_timer_disable(timer);
 
+	/*
+	 * FIXME: Once DT clock-parents or set-parents support is upstream,
+	 * this is to become a NOOP.
+	 */
 	return omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
 }
 
-- 
1.7.9.5

[PATCH 4/9] ARM: OMAP: dmtimer: Add function to check if timer is running

[Joel Fernandes]

Inorder to move non-DM timer specific code that modifies the "idlect"
mask on OMAP1, from dmtimer code, to OMAP1 specific timer initialization code,
we introduce a new function that can possibly be reused for other purposes in
the future. The function just checks if a timer is running based on the timer ID
which should be same as pdev->id. This allows us to cleanly separate the timer vs
non-timer bits and keep the timer bits in the dmtimer code.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c              |   29 +++++++++++++++++++++++++++++
 arch/arm/plat-omap/include/plat/dmtimer.h |    2 ++
 2 files changed, 31 insertions(+)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 4debb3d..86b2641 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -187,6 +187,35 @@ int omap_dm_timer_reserve_systimer(int id)
 	return 0;
 }
 
+/*
+ * Check if a timer is running based on timer_id, used for OMAP1 currently.
+ */
+int omap_dm_timer_is_running(int timer_id)
+{
+	int i = 1, ret = 0;
+	struct omap_dm_timer *timer = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dm_timer_lock, flags);
+	list_for_each_entry(timer, &omap_timer_list, node) {
+		if (i == timer_id) {
+			u32 l;
+			l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+			if (l & OMAP_TIMER_CTRL_ST) {
+				ret = 1;
+				goto done;
+			} else {
+				goto done;
+			}
+		}
+		i++;
+	}
+done:
+	spin_unlock_irqrestore(&dm_timer_lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_is_running);
+
 static struct omap_dm_timer *_omap_dm_timer_request(int req_type, void *data)
 {
 	struct omap_dm_timer *timer = NULL, *t;
diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h
index 2861b15..41df0a6 100644
--- a/arch/arm/plat-omap/include/plat/dmtimer.h
+++ b/arch/arm/plat-omap/include/plat/dmtimer.h
@@ -135,6 +135,8 @@ void omap_dm_timer_disable(struct omap_dm_timer *timer);
 
 int omap_dm_timer_get_irq(struct omap_dm_timer *timer);
 
+int omap_dm_timer_is_running(int timer_id);
+
 u32 omap_dm_timer_modify_idlect_mask(u32 inputmask);
 struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer);
 
-- 
1.7.9.5

[PATCH 4/9] ARM: OMAP: dmtimer: Add function to check if timer is running

[Joel Fernandes]

Inorder to move non-DM timer specific code that modifies the "idlect"
mask on OMAP1, from dmtimer code, to OMAP1 specific timer initialization code,
we introduce a new function that can possibly be reused for other purposes in
the future. The function just checks if a timer is running based on the timer ID
which should be same as pdev->id. This allows us to cleanly separate the timer vs
non-timer bits and keep the timer bits in the dmtimer code.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c              |   29 +++++++++++++++++++++++++++++
 arch/arm/plat-omap/include/plat/dmtimer.h |    2 ++
 2 files changed, 31 insertions(+)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 4debb3d..86b2641 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -187,6 +187,35 @@ int omap_dm_timer_reserve_systimer(int id)
 	return 0;
 }
 
+/*
+ * Check if a timer is running based on timer_id, used for OMAP1 currently.
+ */
+int omap_dm_timer_is_running(int timer_id)
+{
+	int i = 1, ret = 0;
+	struct omap_dm_timer *timer = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dm_timer_lock, flags);
+	list_for_each_entry(timer, &omap_timer_list, node) {
+		if (i == timer_id) {
+			u32 l;
+			l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+			if (l & OMAP_TIMER_CTRL_ST) {
+				ret = 1;
+				goto done;
+			} else {
+				goto done;
+			}
+		}
+		i++;
+	}
+done:
+	spin_unlock_irqrestore(&dm_timer_lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_is_running);
+
 static struct omap_dm_timer *_omap_dm_timer_request(int req_type, void *data)
 {
 	struct omap_dm_timer *timer = NULL, *t;
diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h
index 2861b15..41df0a6 100644
--- a/arch/arm/plat-omap/include/plat/dmtimer.h
+++ b/arch/arm/plat-omap/include/plat/dmtimer.h
@@ -135,6 +135,8 @@ void omap_dm_timer_disable(struct omap_dm_timer *timer);
 
 int omap_dm_timer_get_irq(struct omap_dm_timer *timer);
 
+int omap_dm_timer_is_running(int timer_id);
+
 u32 omap_dm_timer_modify_idlect_mask(u32 inputmask);
 struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer);
 
-- 
1.7.9.5

[PATCH 4/9] ARM: OMAP: dmtimer: Add function to check if timer is running

[Joel Fernandes]

Inorder to move non-DM timer specific code that modifies the "idlect"
mask on OMAP1, from dmtimer code, to OMAP1 specific timer initialization code,
we introduce a new function that can possibly be reused for other purposes in
the future. The function just checks if a timer is running based on the timer ID
which should be same as pdev->id. This allows us to cleanly separate the timer vs
non-timer bits and keep the timer bits in the dmtimer code.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c              |   29 +++++++++++++++++++++++++++++
 arch/arm/plat-omap/include/plat/dmtimer.h |    2 ++
 2 files changed, 31 insertions(+)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 4debb3d..86b2641 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -187,6 +187,35 @@ int omap_dm_timer_reserve_systimer(int id)
 	return 0;
 }
 
+/*
+ * Check if a timer is running based on timer_id, used for OMAP1 currently.
+ */
+int omap_dm_timer_is_running(int timer_id)
+{
+	int i = 1, ret = 0;
+	struct omap_dm_timer *timer = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dm_timer_lock, flags);
+	list_for_each_entry(timer, &omap_timer_list, node) {
+		if (i == timer_id) {
+			u32 l;
+			l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+			if (l & OMAP_TIMER_CTRL_ST) {
+				ret = 1;
+				goto done;
+			} else {
+				goto done;
+			}
+		}
+		i++;
+	}
+done:
+	spin_unlock_irqrestore(&dm_timer_lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_is_running);
+
 static struct omap_dm_timer *_omap_dm_timer_request(int req_type, void *data)
 {
 	struct omap_dm_timer *timer = NULL, *t;
diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h
index 2861b15..41df0a6 100644
--- a/arch/arm/plat-omap/include/plat/dmtimer.h
+++ b/arch/arm/plat-omap/include/plat/dmtimer.h
@@ -135,6 +135,8 @@ void omap_dm_timer_disable(struct omap_dm_timer *timer);
 
 int omap_dm_timer_get_irq(struct omap_dm_timer *timer);
 
+int omap_dm_timer_is_running(int timer_id);
+
 u32 omap_dm_timer_modify_idlect_mask(u32 inputmask);
 struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer);
 
-- 
1.7.9.5

[PATCH 5/9] ARM: OMAP1: dmtimer: Rewrite modify of IDLECT mask to use new is_running function

[Joel Fernandes]

While at it, also delete the old definition of the function in dmtimer.c code.
This completes the separation and removal of OMAP1 header dependency in dmtimer
code and removes references to MOD_CONF_CTRL registers in dmtimer.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/mach-omap1/include/mach/hardware.h |    2 ++
 arch/arm/mach-omap1/timer.c                 |   26 +++++++++++++++
 arch/arm/plat-omap/dmtimer.c                |   48 ---------------------------
 arch/arm/plat-omap/include/plat/dmtimer.h   |    1 -
 4 files changed, 28 insertions(+), 49 deletions(-)

diff --git a/arch/arm/mach-omap1/include/mach/hardware.h b/arch/arm/mach-omap1/include/mach/hardware.h
index 5875a50..46de040 100644
--- a/arch/arm/mach-omap1/include/mach/hardware.h
+++ b/arch/arm/mach-omap1/include/mach/hardware.h
@@ -70,6 +70,8 @@ static inline u32 omap_cs3_phys(void)
 			? 0 : OMAP_CS3_PHYS;
 }
 
+__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask);
+
 #endif	/* ifndef __ASSEMBLER__ */
 
 #define OMAP1_IO_OFFSET		0x01000000	/* Virtual IO = 0xfefb0000 */
diff --git a/arch/arm/mach-omap1/timer.c b/arch/arm/mach-omap1/timer.c
index 4b9c604..0a039f1 100644
--- a/arch/arm/mach-omap1/timer.c
+++ b/arch/arm/mach-omap1/timer.c
@@ -42,6 +42,32 @@
 
 #define OMAP1_DM_TIMER_COUNT		8
 
+/**
+ * omap_dm_timer_modify_idlect_mask - Check if any running timers use ARMXOR
+ * @inputmask: current value of idlect mask
+ */
+__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
+{
+	int i;
+
+	/* If ARMXOR cannot be idled this function call is unnecessary */
+	if (!(inputmask & (1 << 1)))
+		return inputmask;
+
+	for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) {
+		if (omap_dm_timer_is_running(i)) {
+			if (((omap_readl(MOD_CONF_CTRL_1) >> ((i-1) * 2))
+			      & 0x03) == 0)
+				inputmask &= ~(1 << 1);
+			else
+				inputmask &= ~(1 << 2);
+		}
+		i++;
+	}
+
+	return inputmask;
+}
+
 static int omap1_dm_timer_set_src(struct platform_device *pdev,
 				int source)
 {
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 86b2641..0e96ad2 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -397,44 +397,6 @@ int omap_dm_timer_get_irq(struct omap_dm_timer *timer)
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_get_irq);
 
-#if defined(CONFIG_ARCH_OMAP1)
-#include <mach/hardware.h>
-/**
- * omap_dm_timer_modify_idlect_mask - Check if any running timers use ARMXOR
- * @inputmask: current value of idlect mask
- */
-__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
-{
-	int i = 0;
-	struct omap_dm_timer *timer = NULL;
-	unsigned long flags;
-
-	/* If ARMXOR cannot be idled this function call is unnecessary */
-	if (!(inputmask & (1 << 1)))
-		return inputmask;
-
-	/* If any active timer is using ARMXOR return modified mask */
-	spin_lock_irqsave(&dm_timer_lock, flags);
-	list_for_each_entry(timer, &omap_timer_list, node) {
-		u32 l;
-
-		l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
-		if (l & OMAP_TIMER_CTRL_ST) {
-			if (((omap_readl(MOD_CONF_CTRL_1) >> (i * 2)) & 0x03) == 0)
-				inputmask &= ~(1 << 1);
-			else
-				inputmask &= ~(1 << 2);
-		}
-		i++;
-	}
-	spin_unlock_irqrestore(&dm_timer_lock, flags);
-
-	return inputmask;
-}
-EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask);
-
-#else
-
 struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)
 {
 	if (timer && !IS_ERR(timer->fclk))
@@ -443,16 +405,6 @@ struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_get_fclk);
 
-__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
-{
-	BUG();
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask);
-
-#endif
-
 int omap_dm_timer_trigger(struct omap_dm_timer *timer)
 {
 	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h
index 41df0a6..16ea9fd 100644
--- a/arch/arm/plat-omap/include/plat/dmtimer.h
+++ b/arch/arm/plat-omap/include/plat/dmtimer.h
@@ -137,7 +137,6 @@ int omap_dm_timer_get_irq(struct omap_dm_timer *timer);
 
 int omap_dm_timer_is_running(int timer_id);
 
-u32 omap_dm_timer_modify_idlect_mask(u32 inputmask);
 struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer);
 
 int omap_dm_timer_trigger(struct omap_dm_timer *timer);
-- 
1.7.9.5

[PATCH 5/9] ARM: OMAP1: dmtimer: Rewrite modify of IDLECT mask to use new is_running function

[Joel Fernandes]

While at it, also delete the old definition of the function in dmtimer.c code.
This completes the separation and removal of OMAP1 header dependency in dmtimer
code and removes references to MOD_CONF_CTRL registers in dmtimer.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/mach-omap1/include/mach/hardware.h |    2 ++
 arch/arm/mach-omap1/timer.c                 |   26 +++++++++++++++
 arch/arm/plat-omap/dmtimer.c                |   48 ---------------------------
 arch/arm/plat-omap/include/plat/dmtimer.h   |    1 -
 4 files changed, 28 insertions(+), 49 deletions(-)

diff --git a/arch/arm/mach-omap1/include/mach/hardware.h b/arch/arm/mach-omap1/include/mach/hardware.h
index 5875a50..46de040 100644
--- a/arch/arm/mach-omap1/include/mach/hardware.h
+++ b/arch/arm/mach-omap1/include/mach/hardware.h
@@ -70,6 +70,8 @@ static inline u32 omap_cs3_phys(void)
 			? 0 : OMAP_CS3_PHYS;
 }
 
+__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask);
+
 #endif	/* ifndef __ASSEMBLER__ */
 
 #define OMAP1_IO_OFFSET		0x01000000	/* Virtual IO = 0xfefb0000 */
diff --git a/arch/arm/mach-omap1/timer.c b/arch/arm/mach-omap1/timer.c
index 4b9c604..0a039f1 100644
--- a/arch/arm/mach-omap1/timer.c
+++ b/arch/arm/mach-omap1/timer.c
@@ -42,6 +42,32 @@
 
 #define OMAP1_DM_TIMER_COUNT		8
 
+/**
+ * omap_dm_timer_modify_idlect_mask - Check if any running timers use ARMXOR
+ * @inputmask: current value of idlect mask
+ */
+__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
+{
+	int i;
+
+	/* If ARMXOR cannot be idled this function call is unnecessary */
+	if (!(inputmask & (1 << 1)))
+		return inputmask;
+
+	for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) {
+		if (omap_dm_timer_is_running(i)) {
+			if (((omap_readl(MOD_CONF_CTRL_1) >> ((i-1) * 2))
+			      & 0x03) == 0)
+				inputmask &= ~(1 << 1);
+			else
+				inputmask &= ~(1 << 2);
+		}
+		i++;
+	}
+
+	return inputmask;
+}
+
 static int omap1_dm_timer_set_src(struct platform_device *pdev,
 				int source)
 {
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 86b2641..0e96ad2 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -397,44 +397,6 @@ int omap_dm_timer_get_irq(struct omap_dm_timer *timer)
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_get_irq);
 
-#if defined(CONFIG_ARCH_OMAP1)
-#include <mach/hardware.h>
-/**
- * omap_dm_timer_modify_idlect_mask - Check if any running timers use ARMXOR
- * @inputmask: current value of idlect mask
- */
-__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
-{
-	int i = 0;
-	struct omap_dm_timer *timer = NULL;
-	unsigned long flags;
-
-	/* If ARMXOR cannot be idled this function call is unnecessary */
-	if (!(inputmask & (1 << 1)))
-		return inputmask;
-
-	/* If any active timer is using ARMXOR return modified mask */
-	spin_lock_irqsave(&dm_timer_lock, flags);
-	list_for_each_entry(timer, &omap_timer_list, node) {
-		u32 l;
-
-		l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
-		if (l & OMAP_TIMER_CTRL_ST) {
-			if (((omap_readl(MOD_CONF_CTRL_1) >> (i * 2)) & 0x03) == 0)
-				inputmask &= ~(1 << 1);
-			else
-				inputmask &= ~(1 << 2);
-		}
-		i++;
-	}
-	spin_unlock_irqrestore(&dm_timer_lock, flags);
-
-	return inputmask;
-}
-EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask);
-
-#else
-
 struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)
 {
 	if (timer && !IS_ERR(timer->fclk))
@@ -443,16 +405,6 @@ struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_get_fclk);
 
-__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
-{
-	BUG();
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask);
-
-#endif
-
 int omap_dm_timer_trigger(struct omap_dm_timer *timer)
 {
 	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h
index 41df0a6..16ea9fd 100644
--- a/arch/arm/plat-omap/include/plat/dmtimer.h
+++ b/arch/arm/plat-omap/include/plat/dmtimer.h
@@ -137,7 +137,6 @@ int omap_dm_timer_get_irq(struct omap_dm_timer *timer);
 
 int omap_dm_timer_is_running(int timer_id);
 
-u32 omap_dm_timer_modify_idlect_mask(u32 inputmask);
 struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer);
 
 int omap_dm_timer_trigger(struct omap_dm_timer *timer);
-- 
1.7.9.5

[PATCH 6/9] ARM: OMAP: dmtimer: Add a write_ctrl function to simplify bit setting

[Joel Fernandes]

A common pattern in dmtimer code is to read the control reg, set and reset
certain bits, and write it back. We abstract this pattern and introduce a
new function to do so.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |   63 ++++++++++++++++++++++++------------------
 1 file changed, 36 insertions(+), 27 deletions(-)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 0e96ad2..782ff10 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -91,6 +91,18 @@ static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, u32 reg,
 	__omap_dm_timer_write(timer, reg, value, timer->posted);
 }
 
+static u32 omap_dm_timer_write_ctrl(struct omap_dm_timer *timer, u32 mask,
+		u32 value)
+{
+	u32 l;
+
+	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+	l &= mask;
+	l |= value;
+	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+	return l;
+}
+
 static void omap_timer_restore_context(struct omap_dm_timer *timer)
 {
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG,
@@ -521,23 +533,22 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_source);
 int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
 			    unsigned int load)
 {
-	u32 l;
+	u32 mask = ~0, val = 0;
 
 	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;
+		val |= OMAP_TIMER_CTRL_AR;
 	else
-		l &= ~OMAP_TIMER_CTRL_AR;
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+		mask &= ~OMAP_TIMER_CTRL_AR;
+	val = omap_dm_timer_write_ctrl(timer, mask, val);
 	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.tclr = val;
 	timer->context.tldr = load;
 	omap_dm_timer_disable(timer);
 	return 0;
@@ -577,22 +588,22 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_load_start);
 int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
 			     unsigned int match)
 {
-	u32 l;
+	u32 mask = ~0, val = 0;
 
 	if (unlikely(!timer))
 		return -EINVAL;
 
 	omap_dm_timer_enable(timer);
-	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
 	if (enable)
-		l |= OMAP_TIMER_CTRL_CE;
+		val |= OMAP_TIMER_CTRL_CE;
 	else
-		l &= ~OMAP_TIMER_CTRL_CE;
+		mask &= ~OMAP_TIMER_CTRL_CE;
+
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+	val = omap_dm_timer_write_ctrl(timer, mask, val);
 
 	/* Save the context */
-	timer->context.tclr = l;
+	timer->context.tclr = val;
 	timer->context.tmar = match;
 	omap_dm_timer_disable(timer);
 	return 0;
@@ -602,24 +613,23 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_match);
 int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
 			   int toggle, int trigger)
 {
-	u32 l;
+	u32 mask = ~0, val = 0;
 
 	if (unlikely(!timer))
 		return -EINVAL;
 
 	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 |
+	mask &= ~(OMAP_TIMER_CTRL_GPOCFG | OMAP_TIMER_CTRL_SCPWM |
 	       OMAP_TIMER_CTRL_PT | (0x03 << 10));
 	if (def_on)
-		l |= OMAP_TIMER_CTRL_SCPWM;
+		val |= OMAP_TIMER_CTRL_SCPWM;
 	if (toggle)
-		l |= OMAP_TIMER_CTRL_PT;
-	l |= trigger << 10;
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+		val |= OMAP_TIMER_CTRL_PT;
+	val |= trigger << 10;
+	val = omap_dm_timer_write_ctrl(timer, mask, val);
 
 	/* Save the context */
-	timer->context.tclr = l;
+	timer->context.tclr = val;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -627,22 +637,21 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_pwm);
 
 int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler)
 {
-	u32 l;
+	u32 mask = ~0, val = 0;
 
 	if (unlikely(!timer))
 		return -EINVAL;
 
 	omap_dm_timer_enable(timer);
-	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
-	l &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2));
+	mask &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2));
 	if (prescaler >= 0x00 && prescaler <= 0x07) {
-		l |= OMAP_TIMER_CTRL_PRE;
-		l |= prescaler << 2;
+		val |= OMAP_TIMER_CTRL_PRE;
+		val |= prescaler << 2;
 	}
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+	val = omap_dm_timer_write_ctrl(timer, mask, val);
 
 	/* Save the context */
-	timer->context.tclr = l;
+	timer->context.tclr = val;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
-- 
1.7.9.5

[PATCH 6/9] ARM: OMAP: dmtimer: Add a write_ctrl function to simplify bit setting

[Joel Fernandes]

A common pattern in dmtimer code is to read the control reg, set and reset
certain bits, and write it back. We abstract this pattern and introduce a
new function to do so.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |   63 ++++++++++++++++++++++++------------------
 1 file changed, 36 insertions(+), 27 deletions(-)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 0e96ad2..782ff10 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -91,6 +91,18 @@ static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, u32 reg,
 	__omap_dm_timer_write(timer, reg, value, timer->posted);
 }
 
+static u32 omap_dm_timer_write_ctrl(struct omap_dm_timer *timer, u32 mask,
+		u32 value)
+{
+	u32 l;
+
+	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+	l &= mask;
+	l |= value;
+	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+	return l;
+}
+
 static void omap_timer_restore_context(struct omap_dm_timer *timer)
 {
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG,
@@ -521,23 +533,22 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_source);
 int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
 			    unsigned int load)
 {
-	u32 l;
+	u32 mask = ~0, val = 0;
 
 	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;
+		val |= OMAP_TIMER_CTRL_AR;
 	else
-		l &= ~OMAP_TIMER_CTRL_AR;
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+		mask &= ~OMAP_TIMER_CTRL_AR;
+	val = omap_dm_timer_write_ctrl(timer, mask, val);
 	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.tclr = val;
 	timer->context.tldr = load;
 	omap_dm_timer_disable(timer);
 	return 0;
@@ -577,22 +588,22 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_load_start);
 int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
 			     unsigned int match)
 {
-	u32 l;
+	u32 mask = ~0, val = 0;
 
 	if (unlikely(!timer))
 		return -EINVAL;
 
 	omap_dm_timer_enable(timer);
-	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
 	if (enable)
-		l |= OMAP_TIMER_CTRL_CE;
+		val |= OMAP_TIMER_CTRL_CE;
 	else
-		l &= ~OMAP_TIMER_CTRL_CE;
+		mask &= ~OMAP_TIMER_CTRL_CE;
+
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+	val = omap_dm_timer_write_ctrl(timer, mask, val);
 
 	/* Save the context */
-	timer->context.tclr = l;
+	timer->context.tclr = val;
 	timer->context.tmar = match;
 	omap_dm_timer_disable(timer);
 	return 0;
@@ -602,24 +613,23 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_match);
 int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
 			   int toggle, int trigger)
 {
-	u32 l;
+	u32 mask = ~0, val = 0;
 
 	if (unlikely(!timer))
 		return -EINVAL;
 
 	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 |
+	mask &= ~(OMAP_TIMER_CTRL_GPOCFG | OMAP_TIMER_CTRL_SCPWM |
 	       OMAP_TIMER_CTRL_PT | (0x03 << 10));
 	if (def_on)
-		l |= OMAP_TIMER_CTRL_SCPWM;
+		val |= OMAP_TIMER_CTRL_SCPWM;
 	if (toggle)
-		l |= OMAP_TIMER_CTRL_PT;
-	l |= trigger << 10;
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+		val |= OMAP_TIMER_CTRL_PT;
+	val |= trigger << 10;
+	val = omap_dm_timer_write_ctrl(timer, mask, val);
 
 	/* Save the context */
-	timer->context.tclr = l;
+	timer->context.tclr = val;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -627,22 +637,21 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_pwm);
 
 int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler)
 {
-	u32 l;
+	u32 mask = ~0, val = 0;
 
 	if (unlikely(!timer))
 		return -EINVAL;
 
 	omap_dm_timer_enable(timer);
-	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
-	l &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2));
+	mask &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2));
 	if (prescaler >= 0x00 && prescaler <= 0x07) {
-		l |= OMAP_TIMER_CTRL_PRE;
-		l |= prescaler << 2;
+		val |= OMAP_TIMER_CTRL_PRE;
+		val |= prescaler << 2;
 	}
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+	val = omap_dm_timer_write_ctrl(timer, mask, val);
 
 	/* Save the context */
-	timer->context.tclr = l;
+	timer->context.tclr = val;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
-- 
1.7.9.5

[PATCH 6/9] ARM: OMAP: dmtimer: Add a write_ctrl function to simplify bit setting

[Joel Fernandes]

A common pattern in dmtimer code is to read the control reg, set and reset
certain bits, and write it back. We abstract this pattern and introduce a
new function to do so.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |   63 ++++++++++++++++++++++++------------------
 1 file changed, 36 insertions(+), 27 deletions(-)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 0e96ad2..782ff10 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -91,6 +91,18 @@ static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, u32 reg,
 	__omap_dm_timer_write(timer, reg, value, timer->posted);
 }
 
+static u32 omap_dm_timer_write_ctrl(struct omap_dm_timer *timer, u32 mask,
+		u32 value)
+{
+	u32 l;
+
+	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+	l &= mask;
+	l |= value;
+	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+	return l;
+}
+
 static void omap_timer_restore_context(struct omap_dm_timer *timer)
 {
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG,
@@ -521,23 +533,22 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_source);
 int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
 			    unsigned int load)
 {
-	u32 l;
+	u32 mask = ~0, val = 0;
 
 	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;
+		val |= OMAP_TIMER_CTRL_AR;
 	else
-		l &= ~OMAP_TIMER_CTRL_AR;
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+		mask &= ~OMAP_TIMER_CTRL_AR;
+	val = omap_dm_timer_write_ctrl(timer, mask, val);
 	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.tclr = val;
 	timer->context.tldr = load;
 	omap_dm_timer_disable(timer);
 	return 0;
@@ -577,22 +588,22 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_load_start);
 int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
 			     unsigned int match)
 {
-	u32 l;
+	u32 mask = ~0, val = 0;
 
 	if (unlikely(!timer))
 		return -EINVAL;
 
 	omap_dm_timer_enable(timer);
-	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
 	if (enable)
-		l |= OMAP_TIMER_CTRL_CE;
+		val |= OMAP_TIMER_CTRL_CE;
 	else
-		l &= ~OMAP_TIMER_CTRL_CE;
+		mask &= ~OMAP_TIMER_CTRL_CE;
+
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+	val = omap_dm_timer_write_ctrl(timer, mask, val);
 
 	/* Save the context */
-	timer->context.tclr = l;
+	timer->context.tclr = val;
 	timer->context.tmar = match;
 	omap_dm_timer_disable(timer);
 	return 0;
@@ -602,24 +613,23 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_match);
 int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
 			   int toggle, int trigger)
 {
-	u32 l;
+	u32 mask = ~0, val = 0;
 
 	if (unlikely(!timer))
 		return -EINVAL;
 
 	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 |
+	mask &= ~(OMAP_TIMER_CTRL_GPOCFG | OMAP_TIMER_CTRL_SCPWM |
 	       OMAP_TIMER_CTRL_PT | (0x03 << 10));
 	if (def_on)
-		l |= OMAP_TIMER_CTRL_SCPWM;
+		val |= OMAP_TIMER_CTRL_SCPWM;
 	if (toggle)
-		l |= OMAP_TIMER_CTRL_PT;
-	l |= trigger << 10;
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+		val |= OMAP_TIMER_CTRL_PT;
+	val |= trigger << 10;
+	val = omap_dm_timer_write_ctrl(timer, mask, val);
 
 	/* Save the context */
-	timer->context.tclr = l;
+	timer->context.tclr = val;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
@@ -627,22 +637,21 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_pwm);
 
 int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler)
 {
-	u32 l;
+	u32 mask = ~0, val = 0;
 
 	if (unlikely(!timer))
 		return -EINVAL;
 
 	omap_dm_timer_enable(timer);
-	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
-	l &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2));
+	mask &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2));
 	if (prescaler >= 0x00 && prescaler <= 0x07) {
-		l |= OMAP_TIMER_CTRL_PRE;
-		l |= prescaler << 2;
+		val |= OMAP_TIMER_CTRL_PRE;
+		val |= prescaler << 2;
 	}
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+	val = omap_dm_timer_write_ctrl(timer, mask, val);
 
 	/* Save the context */
-	timer->context.tclr = l;
+	timer->context.tclr = val;
 	omap_dm_timer_disable(timer);
 	return 0;
 }
-- 
1.7.9.5

[PATCH 7/9] ARM: OMAP: dmtimer: Have __omap_dm_timer_load_start set ST bit in CTRL instead of caller

[Joel Fernandes]

"load_start" implies start, so it makes sense to set the ST bit in
__omap_dm_timer_load_start instead of callers.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/mach-omap2/timer.c               |    6 +++---
 arch/arm/plat-omap/dmtimer.c              |    1 -
 arch/arm/plat-omap/include/plat/dmtimer.h |    1 +
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 74044aa..dfb19df 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -95,7 +95,7 @@ static struct irqaction omap2_gp_timer_irq = {
 static int omap2_gp_timer_set_next_event(unsigned long cycles,
 					 struct clock_event_device *evt)
 {
-	__omap_dm_timer_load_start(&clkev, OMAP_TIMER_CTRL_ST,
+	__omap_dm_timer_load_start(&clkev, 0,
 				   0xffffffff - cycles, OMAP_TIMER_POSTED);
 
 	return 0;
@@ -116,7 +116,7 @@ static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
 		__omap_dm_timer_write(&clkev, OMAP_TIMER_LOAD_REG,
 				      0xffffffff - period, OMAP_TIMER_POSTED);
 		__omap_dm_timer_load_start(&clkev,
-					OMAP_TIMER_CTRL_AR | OMAP_TIMER_CTRL_ST,
+					OMAP_TIMER_CTRL_AR,
 					0xffffffff - period, OMAP_TIMER_POSTED);
 		break;
 	case CLOCK_EVT_MODE_ONESHOT:
@@ -469,7 +469,7 @@ static void __init omap2_gptimer_clocksource_init(int gptimer_id,
 	BUG_ON(res);
 
 	__omap_dm_timer_load_start(&clksrc,
-				   OMAP_TIMER_CTRL_ST | OMAP_TIMER_CTRL_AR, 0,
+				   OMAP_TIMER_CTRL_AR, 0,
 				   OMAP_TIMER_NONPOSTED);
 	sched_clock_register(dmtimer_read_sched_clock, 32, clksrc.rate);
 
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 782ff10..8a4a97c 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -573,7 +573,6 @@ int omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload,
 	} else {
 		l &= ~OMAP_TIMER_CTRL_AR;
 	}
-	l |= OMAP_TIMER_CTRL_ST;
 
 	__omap_dm_timer_load_start(timer, l, load, timer->posted);
 
diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h
index 16ea9fd..fe3780a 100644
--- a/arch/arm/plat-omap/include/plat/dmtimer.h
+++ b/arch/arm/plat-omap/include/plat/dmtimer.h
@@ -393,6 +393,7 @@ static inline void __omap_dm_timer_load_start(struct omap_dm_timer *timer,
 						u32 ctrl, unsigned int load,
 						int posted)
 {
+	ctrl |= OMAP_TIMER_CTRL_ST;
 	__omap_dm_timer_write(timer, OMAP_TIMER_COUNTER_REG, load, posted);
 	__omap_dm_timer_write(timer, OMAP_TIMER_CTRL_REG, ctrl, posted);
 }
-- 
1.7.9.5

[PATCH 7/9] ARM: OMAP: dmtimer: Have __omap_dm_timer_load_start set ST bit in CTRL instead of caller

[Joel Fernandes]

"load_start" implies start, so it makes sense to set the ST bit in
__omap_dm_timer_load_start instead of callers.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/mach-omap2/timer.c               |    6 +++---
 arch/arm/plat-omap/dmtimer.c              |    1 -
 arch/arm/plat-omap/include/plat/dmtimer.h |    1 +
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 74044aa..dfb19df 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -95,7 +95,7 @@ static struct irqaction omap2_gp_timer_irq = {
 static int omap2_gp_timer_set_next_event(unsigned long cycles,
 					 struct clock_event_device *evt)
 {
-	__omap_dm_timer_load_start(&clkev, OMAP_TIMER_CTRL_ST,
+	__omap_dm_timer_load_start(&clkev, 0,
 				   0xffffffff - cycles, OMAP_TIMER_POSTED);
 
 	return 0;
@@ -116,7 +116,7 @@ static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
 		__omap_dm_timer_write(&clkev, OMAP_TIMER_LOAD_REG,
 				      0xffffffff - period, OMAP_TIMER_POSTED);
 		__omap_dm_timer_load_start(&clkev,
-					OMAP_TIMER_CTRL_AR | OMAP_TIMER_CTRL_ST,
+					OMAP_TIMER_CTRL_AR,
 					0xffffffff - period, OMAP_TIMER_POSTED);
 		break;
 	case CLOCK_EVT_MODE_ONESHOT:
@@ -469,7 +469,7 @@ static void __init omap2_gptimer_clocksource_init(int gptimer_id,
 	BUG_ON(res);
 
 	__omap_dm_timer_load_start(&clksrc,
-				   OMAP_TIMER_CTRL_ST | OMAP_TIMER_CTRL_AR, 0,
+				   OMAP_TIMER_CTRL_AR, 0,
 				   OMAP_TIMER_NONPOSTED);
 	sched_clock_register(dmtimer_read_sched_clock, 32, clksrc.rate);
 
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 782ff10..8a4a97c 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -573,7 +573,6 @@ int omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload,
 	} else {
 		l &= ~OMAP_TIMER_CTRL_AR;
 	}
-	l |= OMAP_TIMER_CTRL_ST;
 
 	__omap_dm_timer_load_start(timer, l, load, timer->posted);
 
diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h
index 16ea9fd..fe3780a 100644
--- a/arch/arm/plat-omap/include/plat/dmtimer.h
+++ b/arch/arm/plat-omap/include/plat/dmtimer.h
@@ -393,6 +393,7 @@ static inline void __omap_dm_timer_load_start(struct omap_dm_timer *timer,
 						u32 ctrl, unsigned int load,
 						int posted)
 {
+	ctrl |= OMAP_TIMER_CTRL_ST;
 	__omap_dm_timer_write(timer, OMAP_TIMER_COUNTER_REG, load, posted);
 	__omap_dm_timer_write(timer, OMAP_TIMER_CTRL_REG, ctrl, posted);
 }
-- 
1.7.9.5

[PATCH 8/9] ARM: OMAP: dmtimer: Add function to check for timer availability

[Joel Fernandes]

Simplify the check for a timer availability in atleast 4 places by providing a
function to do the same.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |   24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 8a4a97c..7e806f9 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -704,14 +704,22 @@ int omap_dm_timer_set_int_disable(struct omap_dm_timer *timer, u32 mask)
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_set_int_disable);
 
+static int is_timer_available(struct omap_dm_timer *timer)
+{
+	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+		pr_err("Timer not available or enabled.\n");
+		WARN_ON(1);
+		return 0;
+	}
+	return 1;
+}
+
 unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
 {
 	unsigned int l;
 
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
-		pr_err("%s: timer not available or enabled.\n", __func__);
+	if (!is_timer_available(timer))
 		return 0;
-	}
 
 	l = __raw_readl(timer->irq_stat);
 
@@ -721,7 +729,7 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_read_status);
 
 int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev)))
+	if (!is_timer_available(timer))
 		return -EINVAL;
 
 	__omap_dm_timer_write_status(timer, value);
@@ -732,10 +740,8 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_write_status);
 
 unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
-		pr_err("%s: timer not iavailable or enabled.\n", __func__);
+	if (!is_timer_available(timer))
 		return 0;
-	}
 
 	return __omap_dm_timer_read_counter(timer, timer->posted);
 }
@@ -743,10 +749,8 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_read_counter);
 
 int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
-		pr_err("%s: timer not available or enabled.\n", __func__);
+	if (!is_timer_available(timer))
 		return -EINVAL;
-	}
 
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, value);
 
-- 
1.7.9.5

[PATCH 8/9] ARM: OMAP: dmtimer: Add function to check for timer availability

[Joel Fernandes]

Simplify the check for a timer availability in atleast 4 places by providing a
function to do the same.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |   24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 8a4a97c..7e806f9 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -704,14 +704,22 @@ int omap_dm_timer_set_int_disable(struct omap_dm_timer *timer, u32 mask)
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_set_int_disable);
 
+static int is_timer_available(struct omap_dm_timer *timer)
+{
+	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+		pr_err("Timer not available or enabled.\n");
+		WARN_ON(1);
+		return 0;
+	}
+	return 1;
+}
+
 unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
 {
 	unsigned int l;
 
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
-		pr_err("%s: timer not available or enabled.\n", __func__);
+	if (!is_timer_available(timer))
 		return 0;
-	}
 
 	l = __raw_readl(timer->irq_stat);
 
@@ -721,7 +729,7 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_read_status);
 
 int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev)))
+	if (!is_timer_available(timer))
 		return -EINVAL;
 
 	__omap_dm_timer_write_status(timer, value);
@@ -732,10 +740,8 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_write_status);
 
 unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
-		pr_err("%s: timer not iavailable or enabled.\n", __func__);
+	if (!is_timer_available(timer))
 		return 0;
-	}
 
 	return __omap_dm_timer_read_counter(timer, timer->posted);
 }
@@ -743,10 +749,8 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_read_counter);
 
 int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
-		pr_err("%s: timer not available or enabled.\n", __func__);
+	if (!is_timer_available(timer))
 		return -EINVAL;
-	}
 
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, value);
 
-- 
1.7.9.5

[PATCH 8/9] ARM: OMAP: dmtimer: Add function to check for timer availability

[Joel Fernandes]

Simplify the check for a timer availability in atleast 4 places by providing a
function to do the same.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |   24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 8a4a97c..7e806f9 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -704,14 +704,22 @@ int omap_dm_timer_set_int_disable(struct omap_dm_timer *timer, u32 mask)
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_set_int_disable);
 
+static int is_timer_available(struct omap_dm_timer *timer)
+{
+	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+		pr_err("Timer not available or enabled.\n");
+		WARN_ON(1);
+		return 0;
+	}
+	return 1;
+}
+
 unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
 {
 	unsigned int l;
 
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
-		pr_err("%s: timer not available or enabled.\n", __func__);
+	if (!is_timer_available(timer))
 		return 0;
-	}
 
 	l = __raw_readl(timer->irq_stat);
 
@@ -721,7 +729,7 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_read_status);
 
 int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev)))
+	if (!is_timer_available(timer))
 		return -EINVAL;
 
 	__omap_dm_timer_write_status(timer, value);
@@ -732,10 +740,8 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_write_status);
 
 unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
-		pr_err("%s: timer not iavailable or enabled.\n", __func__);
+	if (!is_timer_available(timer))
 		return 0;
-	}
 
 	return __omap_dm_timer_read_counter(timer, timer->posted);
 }
@@ -743,10 +749,8 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_read_counter);
 
 int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value)
 {
-	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
-		pr_err("%s: timer not available or enabled.\n", __func__);
+	if (!is_timer_available(timer))
 		return -EINVAL;
-	}
 
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, value);
 
-- 
1.7.9.5

[PATCH 9/9] ARM: OMAP: dmtimer: Get rid of check for mem resource error

[Joel Fernandes]

The subsequent devm_ioremap_resource will catch it and print an error, let it
be checked there.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |    4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 7e806f9..1fd30fa 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -810,10 +810,6 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 	}
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (unlikely(!mem)) {
-		dev_err(dev, "%s: no memory resource.\n", __func__);
-		return -ENODEV;
-	}
 
 	timer = devm_kzalloc(dev, sizeof(struct omap_dm_timer), GFP_KERNEL);
 	if (!timer) {
-- 
1.7.9.5

[PATCH 9/9] ARM: OMAP: dmtimer: Get rid of check for mem resource error

[Joel Fernandes]

The subsequent devm_ioremap_resource will catch it and print an error, let it
be checked there.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |    4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 7e806f9..1fd30fa 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -810,10 +810,6 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 	}
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (unlikely(!mem)) {
-		dev_err(dev, "%s: no memory resource.\n", __func__);
-		return -ENODEV;
-	}
 
 	timer = devm_kzalloc(dev, sizeof(struct omap_dm_timer), GFP_KERNEL);
 	if (!timer) {
-- 
1.7.9.5

[PATCH 9/9] ARM: OMAP: dmtimer: Get rid of check for mem resource error

[Joel Fernandes]

The subsequent devm_ioremap_resource will catch it and print an error, let it
be checked there.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
 arch/arm/plat-omap/dmtimer.c |    4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 7e806f9..1fd30fa 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -810,10 +810,6 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 	}
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (unlikely(!mem)) {
-		dev_err(dev, "%s: no memory resource.\n", __func__);
-		return -ENODEV;
-	}
 
 	timer = devm_kzalloc(dev, sizeof(struct omap_dm_timer), GFP_KERNEL);
 	if (!timer) {
-- 
1.7.9.5