ARM: S3C64XX: use timekeeping wrapper on cpuidle

The timekeeping is computed from the cpuidle core if we set
the .en_core_tk_irqen flag. Let's use it and remove the duplicated
code.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Tested-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 1 insertions, 11 deletions

diff --git a/arch/arm/mach-s3c64xx/cpuidle.c b/arch/arm/mach-s3c64xx/cpuidle.c
index 2750e5412cee..acb197ccf3f7 100644
--- a/arch/arm/mach-s3c64xx/cpuidle.c
+++ b/arch/arm/mach-s3c64xx/cpuidle.c
@@ -27,12 +27,7 @@ static int s3c64xx_enter_idle(struct cpuidle_device *dev,
                               struct cpuidle_driver *drv,
                               int index)
 {
-        struct timeval before, after;
         unsigned long tmp;
-        int idle_time;
-
-        local_irq_disable();
-        do_gettimeofday(&before);
 
         /* Setup PWRCFG to enter idle mode */
         tmp = __raw_readl(S3C64XX_PWR_CFG);
@@ -42,12 +37,6 @@ static int s3c64xx_enter_idle(struct cpuidle_device *dev,
 
         cpu_do_idle();
 
-        do_gettimeofday(&after);
-        local_irq_enable();
-        idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC +
-                    (after.tv_usec - before.tv_usec);
-
-        dev->last_residency = idle_time;
         return index;
 }
 
@@ -56,6 +45,7 @@ static DEFINE_PER_CPU(struct cpuidle_device, s3c64xx_cpuidle_device);
 static struct cpuidle_driver s3c64xx_cpuidle_driver = {
         .name   = "s3c64xx_cpuidle",
         .owner  = THIS_MODULE,
+        .en_core_tk_irqen = 1,
         .states = {
                 {
                         .enter            = s3c64xx_enter_idle,