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Commit 3434d23b authored by Viresh Kumar's avatar Viresh Kumar Committed by Thomas Gleixner
Browse files

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: default avatarViresh 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: default avatarThomas Gleixner <tglx@linutronix.de>
parent ac34ad27

include/linux/clockchips.h

+26 −0
Original line number Original line Diff line number Diff line
@@ -149,6 +149,32 @@ struct clock_event_device { 
	struct module		*owner;

	struct module		*owner;

} ____cacheline_aligned;

} ____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

 * Calculate a multiplication factor for scaled math, which is used to convert

 * nanoseconds based values to clock ticks:

 * nanoseconds based values to clock ticks: