ARM: EXYNOS4: restart clocksource while system resumes

System resume can't be completed because mct-frc isn't restarted
after system suspends. This patch restarts mct-frc during system
resume.

Reported-by: Jongpill Lee <boyko.lee@samsung.com>
Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos4/mct.c b/arch/arm/mach-exynos4/mct.c
index f3638fa73e62..ddd86864fb83 100644
--- a/arch/arm/mach-exynos4/mct.c
+++ b/arch/arm/mach-exynos4/mct.c
@@ -132,12 +132,18 @@ static cycle_t exynos4_frc_read(struct clocksource *cs)
         return ((cycle_t)hi << 32) | lo;
 }
 
+static void exynos4_frc_resume(struct clocksource *cs)
+{
+        exynos4_mct_frc_start(0, 0);
+}
+
 struct clocksource mct_frc = {
         .name           = "mct-frc",
         .rating         = 400,
         .read           = exynos4_frc_read,
         .mask           = CLOCKSOURCE_MASK(64),
         .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
+        .resume         = exynos4_frc_resume,
 };
 
 static void __init exynos4_clocksource_init(void)