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authorRussell King <rmk+kernel@arm.linux.org.uk>2013-12-29 16:39:50 +0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-12-29 16:41:20 +0400
commit4ff859fe1dc0da0f87bbdfff78f527898878fa4a (patch)
tree0dd6627eafe43281cfa453386a2e9543d0299567 /arch/arm/mach-footbridge
parentb713aa0b15015a65ad5421543b80df86de043d62 (diff)
downloadlinux-4ff859fe1dc0da0f87bbdfff78f527898878fa4a.tar.xz
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: 4e8d76373c9fd ("ARM: footbridge: convert to clockevents/clocksource") Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: <stable@vger.kernel.org>
Diffstat (limited to 'arch/arm/mach-footbridge')
-rw-r--r--arch/arm/mach-footbridge/dc21285-timer.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm/mach-footbridge/dc21285-timer.c b/arch/arm/mach-footbridge/dc21285-timer.c
index 9ee78f7b4990..782f6c71fa0a 100644
--- a/arch/arm/mach-footbridge/dc21285-timer.c
+++ b/arch/arm/mach-footbridge/dc21285-timer.c
@@ -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);
}