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authorAlexandre Belloni <alexandre.belloni@free-electrons.com>2016-09-09 14:13:50 +0300
committerDaniel Lezcano <daniel.lezcano@linaro.org>2016-09-12 08:28:46 +0300
commit2783e5d63a9a38b5246c75b29f0dce4cf995a1b3 (patch)
treed39adddb8528ec51567627af05ea00b977144de0 /drivers/clocksource/timer-atmel-pit.c
parent0d41ec8dbf6766ae2f2b9622cc125be118638ccc (diff)
downloadlinux-2783e5d63a9a38b5246c75b29f0dce4cf995a1b3.tar.xz
clocksource/drivers/timer-atmel-pit: Simplify IRQ handler
Because the PIT is also a proper clocksource, the timekeeping code is already able to handle lost ticks. Reported-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'drivers/clocksource/timer-atmel-pit.c')
-rw-r--r--drivers/clocksource/timer-atmel-pit.c11
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/clocksource/timer-atmel-pit.c b/drivers/clocksource/timer-atmel-pit.c
index 91cf04704ed1..6555821bbdae 100644
--- a/drivers/clocksource/timer-atmel-pit.c
+++ b/drivers/clocksource/timer-atmel-pit.c
@@ -152,15 +152,10 @@ static irqreturn_t at91sam926x_pit_interrupt(int irq, void *dev_id)
/* The PIT interrupt may be disabled, and is shared */
if (clockevent_state_periodic(&data->clkevt) &&
(pit_read(data->base, AT91_PIT_SR) & AT91_PIT_PITS)) {
- unsigned nr_ticks;
-
/* Get number of ticks performed before irq, and ack it */
- nr_ticks = PIT_PICNT(pit_read(data->base, AT91_PIT_PIVR));
- do {
- data->cnt += data->cycle;
- data->clkevt.event_handler(&data->clkevt);
- nr_ticks--;
- } while (nr_ticks);
+ data->cnt += data->cycle * PIT_PICNT(pit_read(data->base,
+ AT91_PIT_PIVR));
+ data->clkevt.event_handler(&data->clkevt);
return IRQ_HANDLED;
}