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-rw-r--r--include/linux/clockchips.h8
-rw-r--r--kernel/time/clockevents.c24
-rw-r--r--kernel/time/timekeeping.c2
3 files changed, 34 insertions, 0 deletions
diff --git a/include/linux/clockchips.h b/include/linux/clockchips.h
index acba894374a1..8a7096fcb01e 100644
--- a/include/linux/clockchips.h
+++ b/include/linux/clockchips.h
@@ -97,6 +97,8 @@ struct clock_event_device {
void (*broadcast)(const struct cpumask *mask);
void (*set_mode)(enum clock_event_mode mode,
struct clock_event_device *);
+ void (*suspend)(struct clock_event_device *);
+ void (*resume)(struct clock_event_device *);
unsigned long min_delta_ticks;
unsigned long max_delta_ticks;
@@ -156,6 +158,9 @@ clockevents_calc_mult_shift(struct clock_event_device *ce, u32 freq, u32 minsec)
freq, minsec);
}
+extern void clockevents_suspend(void);
+extern void clockevents_resume(void);
+
#ifdef CONFIG_GENERIC_CLOCKEVENTS
extern void clockevents_notify(unsigned long reason, void *arg);
#else
@@ -164,6 +169,9 @@ extern void clockevents_notify(unsigned long reason, void *arg);
#else /* CONFIG_GENERIC_CLOCKEVENTS_BUILD */
+static inline void clockevents_suspend(void) {}
+static inline void clockevents_resume(void) {}
+
#define clockevents_notify(reason, arg) do { } while (0)
#endif
diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index 7e1ce012a851..30b6de0d977c 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -397,6 +397,30 @@ void clockevents_exchange_device(struct clock_event_device *old,
local_irq_restore(flags);
}
+/**
+ * clockevents_suspend - suspend clock devices
+ */
+void clockevents_suspend(void)
+{
+ struct clock_event_device *dev;
+
+ list_for_each_entry_reverse(dev, &clockevent_devices, list)
+ if (dev->suspend)
+ dev->suspend(dev);
+}
+
+/**
+ * clockevents_resume - resume clock devices
+ */
+void clockevents_resume(void)
+{
+ struct clock_event_device *dev;
+
+ list_for_each_entry(dev, &clockevent_devices, list)
+ if (dev->resume)
+ dev->resume(dev);
+}
+
#ifdef CONFIG_GENERIC_CLOCKEVENTS
/**
* clockevents_notify - notification about relevant events
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 34e5eac81424..312a675cb240 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -773,6 +773,7 @@ static void timekeeping_resume(void)
read_persistent_clock(&ts);
+ clockevents_resume();
clocksource_resume();
write_seqlock_irqsave(&tk->lock, flags);
@@ -832,6 +833,7 @@ static int timekeeping_suspend(void)
clockevents_notify(CLOCK_EVT_NOTIFY_SUSPEND, NULL);
clocksource_suspend();
+ clockevents_suspend();
return 0;
}