ARMV7: S5P: timer: get the count_value from register when call udelay
Because of count_value is set to tcnb4 register,
should be get from this register when call udelay function.
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/arch/arm/cpu/armv7/s5p-common/timer.c b/arch/arm/cpu/armv7/s5p-common/timer.c
index 0490650..651fd5d 100644
--- a/arch/arm/cpu/armv7/s5p-common/timer.c
+++ b/arch/arm/cpu/armv7/s5p-common/timer.c
@@ -65,15 +65,12 @@
writel((PRESCALER_1 & 0xff) << 8, &timer->tcfg0);
writel((MUX_DIV_2 & 0xf) << MUX4_DIV_SHIFT, &timer->tcfg1);
- if (count_value == 0) {
- /* reset initial value */
- /* count_value = 2085937.5(HZ) (per 1 sec)*/
- count_value = get_pwm_clk() / ((PRESCALER_1 + 1) *
- (MUX_DIV_2 + 1));
+ /* count_value = 2085937.5(HZ) (per 1 sec)*/
+ count_value = get_pwm_clk() / ((PRESCALER_1 + 1) *
+ (MUX_DIV_2 + 1));
- /* count_value / 100 = 20859.375(HZ) (per 10 msec) */
- count_value = count_value / 100;
- }
+ /* count_value / 100 = 20859.375(HZ) (per 10 msec) */
+ count_value = count_value / 100;
/* set count value */
writel(count_value, &timer->tcntb4);
@@ -114,8 +111,11 @@
/* delay x useconds */
void __udelay(unsigned long usec)
{
+ struct s5p_timer *const timer = s5p_get_base_timer();
unsigned long tmo, tmp;
+ count_value = readl(&timer->tcntb4);
+
if (usec >= 1000) {
/*
* if "big" number, spread normalization