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| author | John Stultz <johnstul@us.ibm.com> | 2010-07-13 17:56:28 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2010-07-27 12:40:55 +0200 |
| commit | 852db46d55e85b475a72e665ca08d3317769ceef (patch) | |
| tree | 3802273b1135f0f650868fe9e048d7c0594195fe /include/linux/clocksource.h | |
| parent | f12a15be63d1de9a35971f35f06b73088fa25c3a (diff) | |
| download | linux-852db46d55e85b475a72e665ca08d3317769ceef.tar.gz linux-852db46d55e85b475a72e665ca08d3317769ceef.tar.bz2 linux-852db46d55e85b475a72e665ca08d3317769ceef.zip | |
clocksource: Add __clocksource_updatefreq_hz/khz methods
To properly handle clocksources that change frequencies
at the clocksource->enable() point, this patch adds
a method that will update the clocksource's mult/shift and
max_idle_ns values.
Signed-off-by: John Stultz <johnstul@us.ibm.com>
LKML-Reference: <1279068988-21864-12-git-send-email-johnstul@us.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/clocksource.h')
| -rw-r--r-- | include/linux/clocksource.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h index 21677d99a161..c37b21ad5a3b 100644 --- a/include/linux/clocksource.h +++ b/include/linux/clocksource.h @@ -292,6 +292,8 @@ clocks_calc_mult_shift(u32 *mult, u32 *shift, u32 from, u32 to, u32 minsec); */ extern int __clocksource_register_scale(struct clocksource *cs, u32 scale, u32 freq); +extern void +__clocksource_updatefreq_scale(struct clocksource *cs, u32 scale, u32 freq); static inline int clocksource_register_hz(struct clocksource *cs, u32 hz) { @@ -303,6 +305,15 @@ static inline int clocksource_register_khz(struct clocksource *cs, u32 khz) return __clocksource_register_scale(cs, 1000, khz); } +static inline void __clocksource_updatefreq_hz(struct clocksource *cs, u32 hz) +{ + __clocksource_updatefreq_scale(cs, 1, hz); +} + +static inline void __clocksource_updatefreq_khz(struct clocksource *cs, u32 khz) +{ + __clocksource_updatefreq_scale(cs, 1000, khz); +} static inline void clocksource_calc_mult_shift(struct clocksource *cs, u32 freq, u32 minsec) |