diff options
Diffstat (limited to 'arch/arm/cpu/armv7/s5p-common/timer.c')
| -rw-r--r-- | arch/arm/cpu/armv7/s5p-common/timer.c | 20 |
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); |