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Commit 2783e5d6 authored by Alexandre Belloni's avatar Alexandre Belloni Committed by Daniel Lezcano
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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: default avatarThomas Gleixner <tglx@linutronix.de>
Acked-by: default avatarNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
parent 0d41ec8d

drivers/clocksource/timer-atmel-pit.c

+3 −8
Original line number Diff line number Diff line
@@ -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->cnt += data->cycle * PIT_PICNT(pit_read(data->base,

							      AT91_PIT_PIVR));

		data->clkevt.event_handler(&data->clkevt);

			nr_ticks--;

		} while (nr_ticks);



		return IRQ_HANDLED;

	}