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clockevents: Add helpers to check the state of a clockevent device 

Some clockevent drivers, once migrated to use per-state callbacks,
need to check the state of the clockevent device in their callbacks or
interrupt handler.

Add accessor functions clockevent_state_*() to get this information.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linaro-kernel@lists.linaro.org
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/04a717d490335c688dd7af899fbcede97e1bb8ee.1432192527.git.viresh.kumar@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Viresh Kumar 2015-05-21 13:33:45 +05:30 committed by Thomas Gleixner
parent ac34ad27fc
commit 3434d23b69
1 changed files with 26 additions and 0 deletions
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26
include/linux/clockchips.h
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@ -149,6 +149,32 @@ struct clock_event_device {
struct module *owner;
} ____cacheline_aligned;
/* Helpers to verify state of a clockevent device */
static inline bool clockevent_state_detached(struct clock_event_device *dev)
{
return dev->state == CLOCK_EVT_STATE_DETACHED;
}
static inline bool clockevent_state_shutdown(struct clock_event_device *dev)
{
return dev->state == CLOCK_EVT_STATE_SHUTDOWN;
}
static inline bool clockevent_state_periodic(struct clock_event_device *dev)
{
return dev->state == CLOCK_EVT_STATE_PERIODIC;
}
static inline bool clockevent_state_oneshot(struct clock_event_device *dev)
{
return dev->state == CLOCK_EVT_STATE_ONESHOT;
}
static inline bool clockevent_state_oneshot_stopped(struct clock_event_device *dev)
{
return dev->state == CLOCK_EVT_STATE_ONESHOT_STOPPED;
}
/*
* Calculate a multiplication factor for scaled math, which is used to convert
* nanoseconds based values to clock ticks: