clocksource: add enable() and disable() callbacks

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Add enable() and disable() callbacks for clocksources.

This allows us to put unused clocksources in power save mode.  The
functions clocksource_enable() and clocksource_disable() wrap the
callbacks and are inserted in the timekeeping code to enable before use
and disable after switching to a new clocksource.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Acked-by: John Stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Magnus Damm 2009-04-21 12:24:02 -07:00 • committed by Linus Torvalds

parent 8e19608e8b

commit 4614e6adaf

2 changed files with 40 additions and 3 deletions

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31

include/linux/clocksource.h

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12

kernel/time/timekeeping.c

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