This patch updates HRT driver for supporting PM.
The resume function of PWM4 timer which is used clocksource is needed
when kernel is resuming for restarting.
Signed-off-by: Jaecheol Lee <jc.lee@xxxxxxxxxxx>
---
arch/arm/mach-exynos4/time.c | 16 ++++++++++++++++
1 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-exynos4/time.c b/arch/arm/mach-exynos4/time.c
index e30ac70..86b9fa0 100644
--- a/arch/arm/mach-exynos4/time.c
+++ b/arch/arm/mach-exynos4/time.c
@@ -206,12 +206,28 @@ static cycle_t exynos4_pwm4_read(struct clocksource *cs)
return (cycle_t) ~__raw_readl(S3C_TIMERREG(0x40));
}
+static void exynos4_pwm4_resume(struct clocksource *cs)
+{
+ unsigned long pclk;
+
+ pclk = clk_get_rate(timerclk);
+
+ clk_set_rate(tdiv4, pclk / 2);
+ clk_set_parent(tin4, tdiv4);
+
+ exynos4_pwm_init(4, ~0);
+ exynos4_pwm_start(4, 1);
+}
+
struct clocksource pwm_clocksource = {
.name = "pwm_timer4",
.rating = 250,
.read = exynos4_pwm4_read,
.mask = CLOCKSOURCE_MASK(32),
.flags = CLOCK_SOURCE_IS_CONTINUOUS ,
+#ifdef CONFIG_PM
+ .resume = exynos4_pwm4_resume,
+#endif
};
static void __init exynos4_clocksource_init(void)
--
1.7.1
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