clocksource: exynos_mct: register sched_clock callback

Use the clocksource mct-frc for sched_clock

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index a6ee6d7cd63f..ea4dfc097790 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -24,6 +24,7 @@
 #include <linux/of_irq.h>
 #include <linux/of_address.h>
 #include <linux/clocksource.h>
+#include <linux/sched_clock.h>
 
 #define EXYNOS4_MCTREG(x)               (x)
 #define EXYNOS4_MCT_G_CNT_L             EXYNOS4_MCTREG(0x100)
@@ -192,12 +193,19 @@ struct clocksource mct_frc = {
         .resume         = exynos4_frc_resume,
 };
 
+static u64 notrace exynos4_read_sched_clock(void)
+{
+        return exynos4_frc_read(&mct_frc);
+}
+
 static void __init exynos4_clocksource_init(void)
 {
         exynos4_mct_frc_start(0, 0);
 
         if (clocksource_register_hz(&mct_frc, clk_rate))
                 panic("%s: can't register clocksource\n", mct_frc.name);
+
+        sched_clock_register(exynos4_read_sched_clock, 64, clk_rate);
 }
 
 static void exynos4_mct_comp0_stop(void)