From: Russell King Date: Sun, 29 Dec 2013 12:39:50 +0000 (+0000) Subject: ARM: fix footbridge clockevent device X-Git-Tag: v4.9.8~7158^2~10 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4ff859fe1dc0da0f87bbdfff78f527898878fa4a;p=platform%2Fkernel%2Flinux-rpi3.git 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 Cc: --- diff --git a/arch/arm/mach-footbridge/dc21285-timer.c b/arch/arm/mach-footbridge/dc21285-timer.c index 9ee78f7..782f6c7 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); }