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Diffstat (limited to 'arch/arm/cpu/armv7/s5p-common/timer.c')
-rw-r--r--arch/arm/cpu/armv7/s5p-common/timer.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/arch/arm/cpu/armv7/s5p-common/timer.c b/arch/arm/cpu/armv7/s5p-common/timer.c
index 359c21f5e0..bb0e795e66 100644
--- a/arch/arm/cpu/armv7/s5p-common/timer.c
+++ b/arch/arm/cpu/armv7/s5p-common/timer.c
@@ -31,6 +31,8 @@
DECLARE_GLOBAL_DATA_PTR;
+unsigned long get_current_tick(void);
+
/* macro to read the 16 bit timer */
static inline struct s5p_timer *s5p_get_base_timer(void)
{
@@ -44,6 +46,8 @@ int timer_init(void)
pwm_config(4, 0, 0);
pwm_enable(4);
+ reset_timer_masked();
+
return 0;
}
@@ -72,16 +76,16 @@ void __udelay(unsigned long usec)
* 3. finish normalize.
*/
tmo = usec / 1000;
- tmo *= (CONFIG_SYS_HZ * count_value / 10);
+ tmo *= (CONFIG_SYS_HZ * count_value);
tmo /= 1000;
} else {
/* else small number, don't kill it prior to HZ multiply */
- tmo = usec * CONFIG_SYS_HZ * count_value / 10;
+ tmo = usec * CONFIG_SYS_HZ * count_value;
tmo /= (1000 * 1000);
}
/* get current timestamp */
- tmp = get_timer(0);
+ tmp = get_current_tick();
/* if setting this fordward will roll time stamp */
/* reset "advancing" timestamp to 0, set lastinc value */
@@ -92,7 +96,7 @@ void __udelay(unsigned long usec)
tmo += tmp;
/* loop till event */
- while (get_timer_masked() < tmo)
+ while (get_current_tick() < tmo)
; /* nop */
}
@@ -108,6 +112,14 @@ void reset_timer_masked(void)
unsigned long get_timer_masked(void)
{
struct s5p_timer *const timer = s5p_get_base_timer();
+ unsigned long count_value = readl(&timer->tcntb4);
+
+ return get_current_tick() / count_value;
+}
+
+unsigned long get_current_tick(void)
+{
+ struct s5p_timer *const timer = s5p_get_base_timer();
unsigned long now = readl(&timer->tcnto4);
unsigned long count_value = readl(&timer->tcntb4);
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