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>

diff --git a/arch/arm/mach-s3c64xx/cpuidle.c b/arch/arm/mach-s3c64xx/cpuidle.c
index 2750e5412cee846e7ca4ff67d5a9305be2c854d8..acb197ccf3f7e7635ccbba7a3426303701e0fbf8 100644 (file)
--- 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,