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ARM: fix footbridge clockevent device 

The clockevents code was being told that the footbridge clock event
device ticks at 16x the rate which it actually does.  This leads to
timekeeping problems since it allows the clocksource to wrap before
the kernel notices.  Fix this by using the correct clock.

Fixes: 4e8d76373c ("ARM: footbridge: convert to clockevents/clocksource")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: <stable@vger.kernel.org>
This commit is contained in:
Russell King 2013-12-29 12:39:50 +00:00
parent b713aa0b15
commit 4ff859fe1d
1 changed files with 3 additions and 2 deletions
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5
arch/arm/mach-footbridge/dc21285-timer.c
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@ -96,11 +96,12 @@ static struct irqaction footbridge_timer_irq = {
void __init footbridge_timer_init(void)
{
struct clock_event_device *ce = &ckevt_dc21285;
unsigned rate = DIV_ROUND_CLOSEST(mem_fclk_21285, 16);
clocksource_register_hz(&cksrc_dc21285, (mem_fclk_21285 + 8) / 16);
clocksource_register_hz(&cksrc_dc21285, rate);
setup_irq(ce->irq, &footbridge_timer_irq);
ce->cpumask = cpumask_of(smp_processor_id());
clockevents_config_and_register(ce, mem_fclk_21285, 0x4, 0xffffff);
clockevents_config_and_register(ce, rate, 0x4, 0xffffff);
}