1 files changed, 20 insertions, 3 deletions

diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index 83d2fbd81b93..4bca8b60cdf7 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -151,8 +151,10 @@ extern u64 timecounter_cyc2time(struct timecounter *tc,
  *                      subtraction of non 64 bit counters
  * @mult:               cycle to nanosecond multiplier
  * @shift:              cycle to nanosecond divisor (power of two)
+ * @max_idle_ns:        max idle time permitted by the clocksource (nsecs)
  * @flags:              flags describing special properties
  * @vread:              vsyscall based read
+ * @suspend:            suspend function for the clocksource, if necessary
  * @resume:             resume function for the clocksource, if necessary
  */
 struct clocksource {
@@ -168,9 +170,11 @@ struct clocksource {
         cycle_t mask;
         u32 mult;
         u32 shift;
+        u64 max_idle_ns;
         unsigned long flags;
         cycle_t (*vread)(void);
-        void (*resume)(void);
+        void (*suspend)(struct clocksource *cs);
+        void (*resume)(struct clocksource *cs);
 #ifdef CONFIG_IA64
         void *fsys_mmio;        /* used by fsyscall asm code */
 #define CLKSRC_FSYS_MMIO_SET(mmio, addr)      ((mmio) = (addr))
@@ -275,15 +279,28 @@ extern void clocksource_unregister(struct clocksource*);
 extern void clocksource_touch_watchdog(void);
 extern struct clocksource* clocksource_get_next(void);
 extern void clocksource_change_rating(struct clocksource *cs, int rating);
+extern void clocksource_suspend(void);
 extern void clocksource_resume(void);
 extern struct clocksource * __init __weak clocksource_default_clock(void);
 extern void clocksource_mark_unstable(struct clocksource *cs);
 
+extern void
+clocks_calc_mult_shift(u32 *mult, u32 *shift, u32 from, u32 to, u32 minsec);
+
+static inline void
+clocksource_calc_mult_shift(struct clocksource *cs, u32 freq, u32 minsec)
+{
+        return clocks_calc_mult_shift(&cs->mult, &cs->shift, freq,
+                                      NSEC_PER_SEC, minsec);
+}
+
 #ifdef CONFIG_GENERIC_TIME_VSYSCALL
-extern void update_vsyscall(struct timespec *ts, struct clocksource *c);
+extern void
+update_vsyscall(struct timespec *ts, struct clocksource *c, u32 mult);
 extern void update_vsyscall_tz(void);
 #else
-static inline void update_vsyscall(struct timespec *ts, struct clocksource *c)
+static inline void
+update_vsyscall(struct timespec *ts, struct clocksource *c, u32 mult)
 {
 }