msm: timer: Fix ONESHOT mode interrupts

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MSM timers don't support an interrupt enable/disable bit.
Therefore, when the timer is free running it's possible for the
count to wrap and the match value to match again even though a
set_next_event() call hasn't been made since the last match.

Workaround the lack of an interrupt enable bit by explicitly
stopping the timer in the interrupt handler when the clockevent
is in ONESHOT mode. This should prevent any possibility of the
timer wrapping and matching more than once per set_next_event().

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: David Brown <davidb@codeaurora.org>

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Stephen Boyd 2011-11-08 10:34:06 -08:00 • committed by David Brown

parent dd15ab8141

commit a850c3f644

1 changed files with 20 additions and 5 deletions

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arch/arm/mach-msm/timer.c

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