ARM: at91: cpuidle: Fix target_residency
The following commit:
commit 7e348b9012522fa0efd854d20d210d5e57fcedd1
Author: Robert Lee <rob.lee@linaro.org>
Date: Tue Mar 20 15:22:43 2012 -0500
ARM: at91: Consolidate time keeping and irq enable
Enable core cpuidle timekeeping and irq enabling and remove that
handling from this code.
introduced an additional zero to the state1 (suspend) target residency.
With a periodic tick, the cpu never enters the state1 with both 10000 and
100000.
With a tickless system, it enters to state1 much more often with the
initial value, roughly x7 more.
Fix it by setting the value to 10ms again.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
[nicola.ferre@atmel.com: add precisions given by Daniel to commit message]
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/arch/arm/mach-at91/cpuidle.c b/arch/arm/mach-at91/cpuidle.c
index 69f9e3b..4ec6a6d 100644
--- a/arch/arm/mach-at91/cpuidle.c
+++ b/arch/arm/mach-at91/cpuidle.c
@@ -51,7 +51,7 @@
.states[1] = {
.enter = at91_enter_idle,
.exit_latency = 10,
- .target_residency = 100000,
+ .target_residency = 10000,
.flags = CPUIDLE_FLAG_TIME_VALID,
.name = "RAM_SR",
.desc = "WFI and DDR Self Refresh",