From f869afab8f36c5f8561557f74b4b9846719092da Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Thu, 22 Jun 2006 10:30:53 +0100 Subject: [ARM] 3616/1: fix timer handler wrap logic for a number of platforms Patch from Lennert Buytenhek A couple of platforms aren't using the right comparison type in their timer interrupt handlers (as we're comparing two wrapping timestamps, we need a bmi/bpl-type comparison, not an unsigned comparison) -- this patch fixes them up. Signed-off-by: Lennert Buytenhek Signed-off-by: Russell King --- arch/arm/mach-ep93xx/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/arm/mach-ep93xx/core.c') diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index dcd4176..d0eb364 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -103,7 +103,8 @@ static int ep93xx_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) write_seqlock(&xtime_lock); __raw_writel(1, EP93XX_TIMER1_CLEAR); - while (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time + while ((signed long) + (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time) >= TIMER4_TICKS_PER_JIFFY) { last_jiffy_time += TIMER4_TICKS_PER_JIFFY; timer_tick(regs); -- cgit v1.1 From a059e33ce67cec5e990fdec43f242d3b06c60d1a Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Thu, 22 Jun 2006 10:30:54 +0100 Subject: [ARM] 3617/1: ep93xx: fix slightly incorrect timer tick rate Patch from Lennert Buytenhek The tick rate of timers 1-3 isn't exactly 508 kHz as some parts of the relevant documentation claim, but more like 508.469 kHz (14.7456 MHz divided by 29.) Signed-off-by: Lennert Buytenhek Signed-off-by: Russell King --- arch/arm/mach-ep93xx/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm/mach-ep93xx/core.c') diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index d0eb364..bf6bd71 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -125,7 +125,7 @@ static void __init ep93xx_timer_init(void) { /* Enable periodic HZ timer. */ __raw_writel(0x48, EP93XX_TIMER1_CONTROL); - __raw_writel((508000 / HZ) - 1, EP93XX_TIMER1_LOAD); + __raw_writel((508469 / HZ) - 1, EP93XX_TIMER1_LOAD); __raw_writel(0xc8, EP93XX_TIMER1_CONTROL); /* Enable lost jiffy timer. */ -- cgit v1.1