[PATCH] ARM: TWD: fix the clock calculation for TWD
From: Chao Xie <hidden>
Date: 2011-01-20 06:33:57
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
The original code will do count * (HZ /5). It will make the twd timer rate decreased if HZ can not be excatly divided. For example HZ=128. Signed-off-by: Chao Xie <redacted> --- arch/arm/kernel/smp_twd.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index 35882fb..ca6405b 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c@@ -111,7 +111,8 @@ static void __cpuinit twd_calibrate_rate(void) count = __raw_readl(twd_base + TWD_TIMER_COUNTER); - twd_timer_rate = (0xFFFFFFFFU - count) * (HZ / 5); + twd_timer_rate = ((unsigned long)(0xFFFFFFFFU - count)) + * HZ / 5; printk("%lu.%02luMHz.\n", twd_timer_rate / 1000000, (twd_timer_rate / 100000) % 100);
--
1.6.3.3