This patch modifies the driver to use functions provided by the master
driver to control status of PWM channels instead of modifying shared
registers directly.
Signed-off-by: Tomasz Figa <t.figa@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/clocksource/samsung-time.c | 168 ++++---------------------------------
1 file changed, 15 insertions(+), 153 deletions(-)
diff --git a/drivers/clocksource/samsung-time.c b/drivers/clocksource/samsung-time.c
index 7674882..9425955 100644
--- a/drivers/clocksource/samsung-time.c
+++ b/drivers/clocksource/samsung-time.c
@@ -76,153 +76,11 @@ static struct samsung_timer_source timer_source;
static unsigned long clock_count_per_tick;
static void samsung_timer_resume(void);
-static void samsung_time_stop(enum samsung_timer_mode mode)
-{
- unsigned long tcon;
-
- tcon = __raw_readl(S3C2410_TCON);
-
- switch (mode) {
- case SAMSUNG_PWM0:
- tcon &= ~S3C2410_TCON_T0START;
- break;
-
- case SAMSUNG_PWM1:
- tcon &= ~S3C2410_TCON_T1START;
- break;
-
- case SAMSUNG_PWM2:
- tcon &= ~S3C2410_TCON_T2START;
- break;
-
- case SAMSUNG_PWM3:
- tcon &= ~S3C2410_TCON_T3START;
- break;
-
- case SAMSUNG_PWM4:
- tcon &= ~S3C2410_TCON_T4START;
- break;
-
- default:
- printk(KERN_ERR "Invalid Timer %d\n", mode);
- break;
- }
- __raw_writel(tcon, S3C2410_TCON);
-}
-
-static void samsung_time_setup(enum samsung_timer_mode mode, unsigned long tcnt)
-{
- unsigned long tcon;
-
- tcon = __raw_readl(S3C2410_TCON);
-
- tcnt--;
-
- switch (mode) {
- case SAMSUNG_PWM0:
- tcon &= ~(0x0f << 0);
- tcon |= S3C2410_TCON_T0MANUALUPD;
- break;
-
- case SAMSUNG_PWM1:
- tcon &= ~(0x0f << 8);
- tcon |= S3C2410_TCON_T1MANUALUPD;
- break;
-
- case SAMSUNG_PWM2:
- tcon &= ~(0x0f << 12);
- tcon |= S3C2410_TCON_T2MANUALUPD;
- break;
-
- case SAMSUNG_PWM3:
- tcon &= ~(0x0f << 16);
- tcon |= S3C2410_TCON_T3MANUALUPD;
- break;
-
- case SAMSUNG_PWM4:
- tcon &= ~(0x07 << 20);
- tcon |= S3C2410_TCON_T4MANUALUPD;
- break;
-
- default:
- printk(KERN_ERR "Invalid Timer %d\n", mode);
- break;
- }
-
- __raw_writel(tcnt, S3C2410_TCNTB(mode));
- __raw_writel(tcnt, S3C2410_TCMPB(mode));
- __raw_writel(tcon, S3C2410_TCON);
-}
-
-static void samsung_time_start(enum samsung_timer_mode mode, bool periodic)
-{
- unsigned long tcon;
-
- tcon = __raw_readl(S3C2410_TCON);
-
- switch (mode) {
- case SAMSUNG_PWM0:
- tcon |= S3C2410_TCON_T0START;
- tcon &= ~S3C2410_TCON_T0MANUALUPD;
-
- if (periodic)
- tcon |= S3C2410_TCON_T0RELOAD;
- else
- tcon &= ~S3C2410_TCON_T0RELOAD;
- break;
-
- case SAMSUNG_PWM1:
- tcon |= S3C2410_TCON_T1START;
- tcon &= ~S3C2410_TCON_T1MANUALUPD;
-
- if (periodic)
- tcon |= S3C2410_TCON_T1RELOAD;
- else
- tcon &= ~S3C2410_TCON_T1RELOAD;
- break;
-
- case SAMSUNG_PWM2:
- tcon |= S3C2410_TCON_T2START;
- tcon &= ~S3C2410_TCON_T2MANUALUPD;
-
- if (periodic)
- tcon |= S3C2410_TCON_T2RELOAD;
- else
- tcon &= ~S3C2410_TCON_T2RELOAD;
- break;
-
- case SAMSUNG_PWM3:
- tcon |= S3C2410_TCON_T3START;
- tcon &= ~S3C2410_TCON_T3MANUALUPD;
-
- if (periodic)
- tcon |= S3C2410_TCON_T3RELOAD;
- else
- tcon &= ~S3C2410_TCON_T3RELOAD;
- break;
-
- case SAMSUNG_PWM4:
- tcon |= S3C2410_TCON_T4START;
- tcon &= ~S3C2410_TCON_T4MANUALUPD;
-
- if (periodic)
- tcon |= S3C2410_TCON_T4RELOAD;
- else
- tcon &= ~S3C2410_TCON_T4RELOAD;
- break;
-
- default:
- printk(KERN_ERR "Invalid Timer %d\n", mode);
- break;
- }
- __raw_writel(tcon, S3C2410_TCON);
-}
-
static int samsung_set_next_event(unsigned long cycles,
struct clock_event_device *evt)
{
- samsung_time_setup(timer_source.event_id, cycles);
- samsung_time_start(timer_source.event_id, false);
+ samsung_pwm_setup(pwm, timer_source.event_id, cycles - 1, cycles - 1);
+ samsung_pwm_start(pwm, timer_source.event_id, false);
return 0;
}
@@ -230,12 +88,13 @@ static int samsung_set_next_event(unsigned long cycles,
static void samsung_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
- samsung_time_stop(timer_source.event_id);
+ samsung_pwm_stop(pwm, timer_source.event_id);
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
- samsung_time_setup(timer_source.event_id, clock_count_per_tick);
- samsung_time_start(timer_source.event_id, true);
+ samsung_pwm_setup(pwm, timer_source.event_id,
+ clock_count_per_tick - 1, clock_count_per_tick - 1);
+ samsung_pwm_start(pwm, timer_source.event_id, true);
break;
case CLOCK_EVT_MODE_ONESHOT:
@@ -254,12 +113,14 @@ static void samsung_set_mode(enum clock_event_mode mode,
static void samsung_timer_resume(void)
{
/* event timer restart */
- samsung_time_setup(timer_source.event_id, clock_count_per_tick);
- samsung_time_start(timer_source.event_id, true);
+ samsung_pwm_setup(pwm, timer_source.event_id,
+ clock_count_per_tick - 1, clock_count_per_tick - 1);
+ samsung_pwm_start(pwm, timer_source.event_id, true);
/* source timer restart */
- samsung_time_setup(timer_source.source_id, timer_source.tcnt_max);
- samsung_time_start(timer_source.source_id, true);
+ samsung_pwm_setup(pwm, timer_source.source_id,
+ timer_source.tcnt_max, timer_source.tcnt_max);
+ samsung_pwm_start(pwm, timer_source.source_id, true);
}
static struct clock_event_device time_event_device = {
@@ -364,8 +225,9 @@ static void __init samsung_clocksource_init(void)
clock_rate = pclk / (timer_source.tscaler_div * timer_source.tdiv);
- samsung_time_setup(timer_source.source_id, timer_source.tcnt_max);
- samsung_time_start(timer_source.source_id, true);
+ samsung_pwm_setup(pwm, timer_source.source_id,
+ timer_source.tcnt_max, timer_source.tcnt_max);
+ samsung_pwm_start(pwm, timer_source.source_id, true);
setup_sched_clock(samsung_read_sched_clock,
pwm->variant.bits, clock_rate);
--
1.8.1.5
--
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