If MPU goes to WFI in the idle thread, execution time becomes a bit
slow and the JTAG Debugger doesn't work. This patch is needed for
urgent works(e.g. booting and launching application) and debugging.
To enable sleep_while_idle mode, use below setting.
echo 1 > /sys/power/sleep_while_idle
Signed-off-by: Kim Kyuwon <q1.kim@xxxxxxxxxxx>
---
arch/arm/mach-omap2/cpuidle34xx.c | 3 +++
arch/arm/mach-omap2/pm34xx.c | 5 +++--
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/cpuidle34xx.c
b/arch/arm/mach-omap2/cpuidle34xx.c
index 630108c..1623c2f 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -87,6 +87,9 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
local_irq_disable();
local_fiq_disable();
+ if (!enable_dyn_sleep)
+ goto return_sleep_time;
+
if (!enable_off_mode) {
if (mpu_state < PWRDM_POWER_RET)
mpu_state = PWRDM_POWER_RET;
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 9102cee..402409c 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -484,8 +484,6 @@ static int omap3_fclks_active(void)
int omap3_can_sleep(void)
{
- if (!enable_dyn_sleep)
- return 0;
if (!omap_uart_can_sleep())
return 0;
if (omap3_fclks_active())
@@ -545,6 +543,9 @@ static void omap3_pm_idle(void)
local_irq_disable();
local_fiq_disable();
+ if (!enable_dyn_sleep)
+ goto out;
+
if (!omap3_can_sleep())
goto out;
--
1.5.2.5
--
Kyuwon
--
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