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| author | Patrick Pannuto <ppannuto@codeaurora.org> | 2010-07-19 15:09:26 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2010-07-23 15:08:12 +0200 |
| commit | 22b8f15c2f7130bb0386f548428df2ffd4e81903 (patch) | |
| tree | 4ed7ac08115afdce20d21bd923cd1071c2249dda /include/linux/delay.h | |
| parent | 866e26115cba6b59cec669b6307599e3e4440491 (diff) | |
| download | linux-22b8f15c2f7130bb0386f548428df2ffd4e81903.tar.gz linux-22b8f15c2f7130bb0386f548428df2ffd4e81903.tar.bz2 linux-22b8f15c2f7130bb0386f548428df2ffd4e81903.zip | |
timer: Added usleep[_range] timer
usleep[_range] are finer precision implementations of msleep
and are designed to be drop-in replacements for udelay where
a precise sleep / busy-wait is unnecessary. They also allow
an easy interface to specify slack when a precise (ish)
wakeup is unnecessary to help minimize wakeups
Signed-off-by: Patrick Pannuto <ppannuto@codeaurora.org>
Cc: akinobu.mita@gmail.com
Cc: sboyd@codeaurora.org
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
LKML-Reference: <4C44CDD2.1070708@codeaurora.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/delay.h')
| -rw-r--r-- | include/linux/delay.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/delay.h b/include/linux/delay.h index fd832c6d419e..0e303d1aacd8 100644 --- a/include/linux/delay.h +++ b/include/linux/delay.h @@ -45,6 +45,12 @@ extern unsigned long lpj_fine; void calibrate_delay(void); void msleep(unsigned int msecs); unsigned long msleep_interruptible(unsigned int msecs); +void usleep_range(unsigned long min, unsigned long max); + +static inline void usleep(unsigned long usecs) +{ + usleep_range(usecs, usecs); +} static inline void ssleep(unsigned int seconds) { |