[PATCH] ARM: architected timers: Mark the clockevent with the C3_STOP feature

Santosh Shilimkar santosh.shilimkar at ti.com
Wed Jul 4 05:54:33 EDT 2012


ARM arch timers stop in low power state and hence can not wakeup CPUs in
deeper idle states when used as cloc event devices. Marking these clock event
devices with C3_STOP so that during lowpower states, the tick is managed by
wakeup capable broadcast timer.

Cc: Marc Zyngier <marc.zyngier at arm.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar at ti.com>
---
 arch/arm/kernel/arch_timer.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/kernel/arch_timer.c b/arch/arm/kernel/arch_timer.c
index dd58035..df44c8c 100644
--- a/arch/arm/kernel/arch_timer.c
+++ b/arch/arm/kernel/arch_timer.c
@@ -137,7 +137,7 @@ static int __cpuinit arch_timer_setup(struct clock_event_device *clk)
 	/* Be safe... */
 	arch_timer_disable();
 
-	clk->features = CLOCK_EVT_FEAT_ONESHOT;
+	clk->features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_C3STOP;
 	clk->name = "arch_sys_timer";
 	clk->rating = 450;
 	clk->set_mode = arch_timer_set_mode;
-- 
1.7.9.5




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