diff mbox

ARM: OMAP3xxx: clockdomain: fix software supervised wakeup/sleep

Message ID alpine.DEB.2.00.1207261503290.14468@utopia.booyaka.com (mailing list archive)
State New, archived
Headers show

Commit Message

Paul Walmsley July 26, 2012, 9:04 p.m. UTC
Commit 4da71ae6 ("OMAP: clockdomain: Arch specific funcs for
clkdm_clk_enable/disable") called the OMAP2xxx-specific functions for
clockdomain wakeup and sleep.  This would probably have broken
software-supervised clockdomain wakeup and sleep on OMAP3.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Rajendra Nayak <rnayak@ti.com>
Cc: Jon Hunter <jon-hunter@ti.com>
---
 arch/arm/mach-omap2/clockdomain2xxx_3xxx.c |   50 ++++++++++++++++++++++++++--
 1 file changed, 48 insertions(+), 2 deletions(-)

Comments

Rajendra Nayak July 27, 2012, 5:43 a.m. UTC | #1
On Friday 27 July 2012 02:34 AM, Paul Walmsley wrote:
>
> Commit 4da71ae6 ("OMAP: clockdomain: Arch specific funcs for
> clkdm_clk_enable/disable") called the OMAP2xxx-specific functions for
> clockdomain wakeup and sleep.  This would probably have broken
> software-supervised clockdomain wakeup and sleep on OMAP3.

Its strange this went unnoticed for so long. Thanks for this fix and
sorry about introducing the bug in the first place.

Acked-by: Rajendra Nayak <rnayak@ti.com>

>
> Signed-off-by: Paul Walmsley<paul@pwsan.com>
> Cc: Rajendra Nayak<rnayak@ti.com>
> Cc: Jon Hunter<jon-hunter@ti.com>
> ---
>   arch/arm/mach-omap2/clockdomain2xxx_3xxx.c |   50 ++++++++++++++++++++++++++--
>   1 file changed, 48 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c b/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
> index a0d68db..f99e65c 100644
> --- a/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
> +++ b/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
> @@ -241,6 +241,52 @@ static void omap3_clkdm_deny_idle(struct clockdomain *clkdm)
>   		_clkdm_del_autodeps(clkdm);
>   }
>
> +static int omap3xxx_clkdm_clk_enable(struct clockdomain *clkdm)
> +{
> +	bool hwsup = false;
> +
> +	if (!clkdm->clktrctrl_mask)
> +		return 0;
> +
> +	hwsup = omap2_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
> +				clkdm->clktrctrl_mask);
> +
> +	if (hwsup) {
> +		/* Disable HW transitions when we are changing deps */
> +		_disable_hwsup(clkdm);
> +		_clkdm_add_autodeps(clkdm);
> +		_enable_hwsup(clkdm);
> +	} else {
> +		if (clkdm->flags&  CLKDM_CAN_FORCE_WAKEUP)
> +			omap3_clkdm_wakeup(clkdm);
> +	}
> +
> +	return 0;
> +}
> +
> +static int omap3xxx_clkdm_clk_disable(struct clockdomain *clkdm)
> +{
> +	bool hwsup = false;
> +
> +	if (!clkdm->clktrctrl_mask)
> +		return 0;
> +
> +	hwsup = omap2_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
> +				clkdm->clktrctrl_mask);
> +
> +	if (hwsup) {
> +		/* Disable HW transitions when we are changing deps */
> +		_disable_hwsup(clkdm);
> +		_clkdm_del_autodeps(clkdm);
> +		_enable_hwsup(clkdm);
> +	} else {
> +		if (clkdm->flags&  CLKDM_CAN_FORCE_SLEEP)
> +			omap3_clkdm_sleep(clkdm);
> +	}
> +
> +	return 0;
> +}
> +
>   struct clkdm_ops omap2_clkdm_operations = {
>   	.clkdm_add_wkdep	= omap2_clkdm_add_wkdep,
>   	.clkdm_del_wkdep	= omap2_clkdm_del_wkdep,
> @@ -267,6 +313,6 @@ struct clkdm_ops omap3_clkdm_operations = {
>   	.clkdm_wakeup		= omap3_clkdm_wakeup,
>   	.clkdm_allow_idle	= omap3_clkdm_allow_idle,
>   	.clkdm_deny_idle	= omap3_clkdm_deny_idle,
> -	.clkdm_clk_enable	= omap2_clkdm_clk_enable,
> -	.clkdm_clk_disable	= omap2_clkdm_clk_disable,
> +	.clkdm_clk_enable	= omap3xxx_clkdm_clk_enable,
> +	.clkdm_clk_disable	= omap3xxx_clkdm_clk_disable,
>   };
Rajendra Nayak July 27, 2012, 7:58 a.m. UTC | #2
Paul,

On Fri, Jul 27, 2012 at 2:34 AM, Paul Walmsley <paul@pwsan.com> wrote:
>
> Commit 4da71ae6 ("OMAP: clockdomain: Arch specific funcs for
> clkdm_clk_enable/disable") called the OMAP2xxx-specific functions for
> clockdomain wakeup and sleep.  This would probably have broken
> software-supervised clockdomain wakeup and sleep on OMAP3.

Would something like this be better than duplicating most of
omap2_clkdm_clk_enable/disable?

---
 arch/arm/mach-omap2/clockdomain2xxx_3xxx.c |   25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

Index: linux-2.6/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
===================================================================
--- linux-2.6.orig/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
2012-07-27 13:15:49.238134472 +0530
+++ linux-2.6/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
2012-07-27 13:22:01.607380032 +0530
@@ -162,6 +162,27 @@
                                                clkdm->clktrctrl_mask);
 }

+static void _clkdm_sleep(struct clockdomain *clkdm)
+{
+       if (cpu_is_omap24xx())
+               omap2_cm_set_mod_reg_bits(OMAP24XX_FORCESTATE_MASK,
+                                       clkdm->pwrdm.ptr->prcm_offs,
+                                       OMAP2_PM_PWSTCTRL);
+       else if (cpu_is_omap34xx())
+               omap3xxx_cm_clkdm_force_sleep(clkdm->pwrdm.ptr->prcm_offs,
+                                       clkdm->clktrctrl_mask);
+}
+
+static void _clkdm_wakeup(struct clockdomain *clkdm)
+{
+       if (cpu_is_omap24xx())
+               omap2_cm_clear_mod_reg_bits(OMAP24XX_FORCESTATE_MASK,
+                                       clkdm->pwrdm.ptr->prcm_offs,
+                                       OMAP2_PM_PWSTCTRL);
+       else if (cpu_is_omap34xx())
+               omap3xxx_cm_clkdm_force_wakeup(clkdm->pwrdm.ptr->prcm_offs,
+                                       clkdm->clktrctrl_mask);
+}

 static int omap2_clkdm_clk_enable(struct clockdomain *clkdm)
 {
@@ -180,7 +201,7 @@
                _enable_hwsup(clkdm);
        } else {
                if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
-                       omap2_clkdm_wakeup(clkdm);
+                       _clkdm_wakeup(clkdm);
        }

        return 0;
@@ -203,7 +224,7 @@
                _enable_hwsup(clkdm);
        } else {
                if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP)
-                       omap2_clkdm_sleep(clkdm);
+                       _clkdm_sleep(clkdm);
        }

>
> Signed-off-by: Paul Walmsley <paul@pwsan.com>
> Cc: Rajendra Nayak <rnayak@ti.com>
> Cc: Jon Hunter <jon-hunter@ti.com>
> ---
>  arch/arm/mach-omap2/clockdomain2xxx_3xxx.c |   50 ++++++++++++++++++++++++++--
>  1 file changed, 48 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c b/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
> index a0d68db..f99e65c 100644
> --- a/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
> +++ b/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
> @@ -241,6 +241,52 @@ static void omap3_clkdm_deny_idle(struct clockdomain *clkdm)
>                 _clkdm_del_autodeps(clkdm);
>  }
>
> +static int omap3xxx_clkdm_clk_enable(struct clockdomain *clkdm)
> +{
> +       bool hwsup = false;
> +
> +       if (!clkdm->clktrctrl_mask)
> +               return 0;
> +
> +       hwsup = omap2_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
> +                               clkdm->clktrctrl_mask);
> +
> +       if (hwsup) {
> +               /* Disable HW transitions when we are changing deps */
> +               _disable_hwsup(clkdm);
> +               _clkdm_add_autodeps(clkdm);
> +               _enable_hwsup(clkdm);
> +       } else {
> +               if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
> +                       omap3_clkdm_wakeup(clkdm);
> +       }
> +
> +       return 0;
> +}
> +
> +static int omap3xxx_clkdm_clk_disable(struct clockdomain *clkdm)
> +{
> +       bool hwsup = false;
> +
> +       if (!clkdm->clktrctrl_mask)
> +               return 0;
> +
> +       hwsup = omap2_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
> +                               clkdm->clktrctrl_mask);
> +
> +       if (hwsup) {
> +               /* Disable HW transitions when we are changing deps */
> +               _disable_hwsup(clkdm);
> +               _clkdm_del_autodeps(clkdm);
> +               _enable_hwsup(clkdm);
> +       } else {
> +               if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP)
> +                       omap3_clkdm_sleep(clkdm);
> +       }
> +
> +       return 0;
> +}
> +
>  struct clkdm_ops omap2_clkdm_operations = {
>         .clkdm_add_wkdep        = omap2_clkdm_add_wkdep,
>         .clkdm_del_wkdep        = omap2_clkdm_del_wkdep,
> @@ -267,6 +313,6 @@ struct clkdm_ops omap3_clkdm_operations = {
>         .clkdm_wakeup           = omap3_clkdm_wakeup,
>         .clkdm_allow_idle       = omap3_clkdm_allow_idle,
>         .clkdm_deny_idle        = omap3_clkdm_deny_idle,
> -       .clkdm_clk_enable       = omap2_clkdm_clk_enable,
> -       .clkdm_clk_disable      = omap2_clkdm_clk_disable,
> +       .clkdm_clk_enable       = omap3xxx_clkdm_clk_enable,
> +       .clkdm_clk_disable      = omap3xxx_clkdm_clk_disable,
>  };
> --
> 1.7.10.4
>
Kevin Hilman July 27, 2012, 1:38 p.m. UTC | #3
"Nayak, Rajendra" <rnayak@ti.com> writes:

> Paul,
>
> On Fri, Jul 27, 2012 at 2:34 AM, Paul Walmsley <paul@pwsan.com> wrote:
>>
>> Commit 4da71ae6 ("OMAP: clockdomain: Arch specific funcs for
>> clkdm_clk_enable/disable") called the OMAP2xxx-specific functions for
>> clockdomain wakeup and sleep.  This would probably have broken
>> software-supervised clockdomain wakeup and sleep on OMAP3.
>
> Would something like this be better than duplicating most of
> omap2_clkdm_clk_enable/disable?

Not when using cpu_is* checks at runtime.  Maybe if you setup function
pointers at init time?

Kevin

> ---
>  arch/arm/mach-omap2/clockdomain2xxx_3xxx.c |   25 +++++++++++++++++++++++--
>  1 file changed, 23 insertions(+), 2 deletions(-)
>
> Index: linux-2.6/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
> ===================================================================
> --- linux-2.6.orig/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
> 2012-07-27 13:15:49.238134472 +0530
> +++ linux-2.6/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
> 2012-07-27 13:22:01.607380032 +0530
> @@ -162,6 +162,27 @@
>                                                 clkdm->clktrctrl_mask);
>  }
>
> +static void _clkdm_sleep(struct clockdomain *clkdm)
> +{
> +       if (cpu_is_omap24xx())
> +               omap2_cm_set_mod_reg_bits(OMAP24XX_FORCESTATE_MASK,
> +                                       clkdm->pwrdm.ptr->prcm_offs,
> +                                       OMAP2_PM_PWSTCTRL);
> +       else if (cpu_is_omap34xx())
> +               omap3xxx_cm_clkdm_force_sleep(clkdm->pwrdm.ptr->prcm_offs,
> +                                       clkdm->clktrctrl_mask);
> +}
> +
> +static void _clkdm_wakeup(struct clockdomain *clkdm)
> +{
> +       if (cpu_is_omap24xx())
> +               omap2_cm_clear_mod_reg_bits(OMAP24XX_FORCESTATE_MASK,
> +                                       clkdm->pwrdm.ptr->prcm_offs,
> +                                       OMAP2_PM_PWSTCTRL);
> +       else if (cpu_is_omap34xx())
> +               omap3xxx_cm_clkdm_force_wakeup(clkdm->pwrdm.ptr->prcm_offs,
> +                                       clkdm->clktrctrl_mask);
> +}
>
>  static int omap2_clkdm_clk_enable(struct clockdomain *clkdm)
>  {
> @@ -180,7 +201,7 @@
>                 _enable_hwsup(clkdm);
>         } else {
>                 if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
> -                       omap2_clkdm_wakeup(clkdm);
> +                       _clkdm_wakeup(clkdm);
>         }
>
>         return 0;
> @@ -203,7 +224,7 @@
>                 _enable_hwsup(clkdm);
>         } else {
>                 if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP)
> -                       omap2_clkdm_sleep(clkdm);
> +                       _clkdm_sleep(clkdm);
>         }
>
>>
>> Signed-off-by: Paul Walmsley <paul@pwsan.com>
>> Cc: Rajendra Nayak <rnayak@ti.com>
>> Cc: Jon Hunter <jon-hunter@ti.com>
>> ---
>>  arch/arm/mach-omap2/clockdomain2xxx_3xxx.c |   50 ++++++++++++++++++++++++++--
>>  1 file changed, 48 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c b/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
>> index a0d68db..f99e65c 100644
>> --- a/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
>> +++ b/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
>> @@ -241,6 +241,52 @@ static void omap3_clkdm_deny_idle(struct clockdomain *clkdm)
>>                 _clkdm_del_autodeps(clkdm);
>>  }
>>
>> +static int omap3xxx_clkdm_clk_enable(struct clockdomain *clkdm)
>> +{
>> +       bool hwsup = false;
>> +
>> +       if (!clkdm->clktrctrl_mask)
>> +               return 0;
>> +
>> +       hwsup = omap2_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
>> +                               clkdm->clktrctrl_mask);
>> +
>> +       if (hwsup) {
>> +               /* Disable HW transitions when we are changing deps */
>> +               _disable_hwsup(clkdm);
>> +               _clkdm_add_autodeps(clkdm);
>> +               _enable_hwsup(clkdm);
>> +       } else {
>> +               if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
>> +                       omap3_clkdm_wakeup(clkdm);
>> +       }
>> +
>> +       return 0;
>> +}
>> +
>> +static int omap3xxx_clkdm_clk_disable(struct clockdomain *clkdm)
>> +{
>> +       bool hwsup = false;
>> +
>> +       if (!clkdm->clktrctrl_mask)
>> +               return 0;
>> +
>> +       hwsup = omap2_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
>> +                               clkdm->clktrctrl_mask);
>> +
>> +       if (hwsup) {
>> +               /* Disable HW transitions when we are changing deps */
>> +               _disable_hwsup(clkdm);
>> +               _clkdm_del_autodeps(clkdm);
>> +               _enable_hwsup(clkdm);
>> +       } else {
>> +               if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP)
>> +                       omap3_clkdm_sleep(clkdm);
>> +       }
>> +
>> +       return 0;
>> +}
>> +
>>  struct clkdm_ops omap2_clkdm_operations = {
>>         .clkdm_add_wkdep        = omap2_clkdm_add_wkdep,
>>         .clkdm_del_wkdep        = omap2_clkdm_del_wkdep,
>> @@ -267,6 +313,6 @@ struct clkdm_ops omap3_clkdm_operations = {
>>         .clkdm_wakeup           = omap3_clkdm_wakeup,
>>         .clkdm_allow_idle       = omap3_clkdm_allow_idle,
>>         .clkdm_deny_idle        = omap3_clkdm_deny_idle,
>> -       .clkdm_clk_enable       = omap2_clkdm_clk_enable,
>> -       .clkdm_clk_disable      = omap2_clkdm_clk_disable,
>> +       .clkdm_clk_enable       = omap3xxx_clkdm_clk_enable,
>> +       .clkdm_clk_disable      = omap3xxx_clkdm_clk_disable,
>>  };
>> --
>> 1.7.10.4
>>
> --
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Paul Walmsley July 30, 2012, 4:29 p.m. UTC | #4
Hi

On Fri, 27 Jul 2012, Nayak, Rajendra wrote:

> On Fri, Jul 27, 2012 at 2:34 AM, Paul Walmsley <paul@pwsan.com> wrote:
> >
> > Commit 4da71ae6 ("OMAP: clockdomain: Arch specific funcs for
> > clkdm_clk_enable/disable") called the OMAP2xxx-specific functions for
> > clockdomain wakeup and sleep.  This would probably have broken
> > software-supervised clockdomain wakeup and sleep on OMAP3.
> 
> Would something like this be better than duplicating most of
> omap2_clkdm_clk_enable/disable?

Am working towards getting the cpu_is_*() calls out of there in 
preparation for the move to drivers/.  In fact there are some patches here 
that will be posted shortly to get rid of those clkdm_clk_(enable|disable) 
functions completely.


- Paul
diff mbox

Patch

diff --git a/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c b/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
index a0d68db..f99e65c 100644
--- a/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
+++ b/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
@@ -241,6 +241,52 @@  static void omap3_clkdm_deny_idle(struct clockdomain *clkdm)
 		_clkdm_del_autodeps(clkdm);
 }
 
+static int omap3xxx_clkdm_clk_enable(struct clockdomain *clkdm)
+{
+	bool hwsup = false;
+
+	if (!clkdm->clktrctrl_mask)
+		return 0;
+
+	hwsup = omap2_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
+				clkdm->clktrctrl_mask);
+
+	if (hwsup) {
+		/* Disable HW transitions when we are changing deps */
+		_disable_hwsup(clkdm);
+		_clkdm_add_autodeps(clkdm);
+		_enable_hwsup(clkdm);
+	} else {
+		if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
+			omap3_clkdm_wakeup(clkdm);
+	}
+
+	return 0;
+}
+
+static int omap3xxx_clkdm_clk_disable(struct clockdomain *clkdm)
+{
+	bool hwsup = false;
+
+	if (!clkdm->clktrctrl_mask)
+		return 0;
+
+	hwsup = omap2_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
+				clkdm->clktrctrl_mask);
+
+	if (hwsup) {
+		/* Disable HW transitions when we are changing deps */
+		_disable_hwsup(clkdm);
+		_clkdm_del_autodeps(clkdm);
+		_enable_hwsup(clkdm);
+	} else {
+		if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP)
+			omap3_clkdm_sleep(clkdm);
+	}
+
+	return 0;
+}
+
 struct clkdm_ops omap2_clkdm_operations = {
 	.clkdm_add_wkdep	= omap2_clkdm_add_wkdep,
 	.clkdm_del_wkdep	= omap2_clkdm_del_wkdep,
@@ -267,6 +313,6 @@  struct clkdm_ops omap3_clkdm_operations = {
 	.clkdm_wakeup		= omap3_clkdm_wakeup,
 	.clkdm_allow_idle	= omap3_clkdm_allow_idle,
 	.clkdm_deny_idle	= omap3_clkdm_deny_idle,
-	.clkdm_clk_enable	= omap2_clkdm_clk_enable,
-	.clkdm_clk_disable	= omap2_clkdm_clk_disable,
+	.clkdm_clk_enable	= omap3xxx_clkdm_clk_enable,
+	.clkdm_clk_disable	= omap3xxx_clkdm_clk_disable,
 };