From 861bd4bcf7e7eba165b42e79cea005486851d69b Mon Sep 17 00:00:00 2001
From: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Date: Tue, 23 Jul 2013 13:57:24 +0900
Subject: [PATCH] sh: timer: Mask bit of timer prescaler
timer_init function sets timer prescaler bit.
The previous code so did not mask this bit, this function was to overwrite
the bit. This will fix this problem.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
---
arch/sh/lib/time.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/sh/lib/time.c b/arch/sh/lib/time.c
index 1fe537e83b..8f83d46792 100644
--- a/arch/sh/lib/time.c
+++ b/arch/sh/lib/time.c
@@ -17,6 +17,8 @@
#include <asm/io.h>
#include <sh_tmu.h>
+#define TCR_TPSC 0x07
+
static struct tmu_regs *tmu = (struct tmu_regs *)TMU_BASE;
static u16 bit;
@@ -61,7 +63,7 @@ static void tmu_timer_stop(unsigned int timer)
int timer_init(void)
{
bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
- writew(readw(&tmu->tcr0) | bit, &tmu->tcr0);
+ writew((readw(&tmu->tcr0) & ~TCR_TPSC) | bit, &tmu->tcr0);
tmu_timer_stop(0);
tmu_timer_start(0);
--
2.39.5