[PATCH] clocksource: arm_arch_timer: Use clocksource for suspend timekeeping

[PATCH] clocksource: arm_arch_timer: Use clocksource for suspend timekeeping

[Stephen Boyd]

The ARM architected timers keep counting during suspend so we can
mark this clocksource with the CLOCK_SOURCE_SUSPEND_NONSTOP flag.
This flag will indicate that this clocksource can be used for
calculating suspend time and injecting sleep time into the
timekeeping core. This should be more accurate than using an
external RTC or architecture specific persistent clock.

Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---
 drivers/clocksource/arm_arch_timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index fbd9ccd..ce98d5e 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -389,7 +389,7 @@ static struct clocksource clocksource_counter = {
 	.rating	= 400,
 	.read	= arch_counter_read,
 	.mask	= CLOCKSOURCE_MASK(56),
-	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
+	.flags	= CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_SUSPEND_NONSTOP,
 };
 
 static struct cyclecounter cyclecounter = {
-- 
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[PATCH] clocksource: arm_arch_timer: Use clocksource for suspend timekeeping

[Daniel Lezcano]

On 09/27/2013 10:13 PM, Stephen Boyd wrote:
> The ARM architected timers keep counting during suspend so we can
> mark this clocksource with the CLOCK_SOURCE_SUSPEND_NONSTOP flag.
> This flag will indicate that this clocksource can be used for
> calculating suspend time and injecting sleep time into the
> timekeeping core. This should be more accurate than using an
> external RTC or architecture specific persistent clock.
>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
> ---

Applied to my tree for 3.13

Thanks
   -- Daniel

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