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-rw-r--r--arch/arm/mach-omap2/timer-gp.c9
-rw-r--r--arch/arm/plat-omap/dmtimer.c19
2 files changed, 21 insertions, 7 deletions
diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c
index 78d05f203fff..557603f99313 100644
--- a/arch/arm/mach-omap2/timer-gp.c
+++ b/arch/arm/mach-omap2/timer-gp.c
@@ -59,8 +59,7 @@ static struct irqaction omap2_gp_timer_irq = {
static int omap2_gp_timer_set_next_event(unsigned long cycles,
struct clock_event_device *evt)
{
- omap_dm_timer_set_load(gptimer, 0, 0xffffffff - cycles);
- omap_dm_timer_start(gptimer);
+ omap_dm_timer_set_load_start(gptimer, 0, 0xffffffff - cycles);
return 0;
}
@@ -77,8 +76,7 @@ static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
period = clk_get_rate(omap_dm_timer_get_fclk(gptimer)) / HZ;
period -= 1;
- omap_dm_timer_set_load(gptimer, 1, 0xffffffff - period);
- omap_dm_timer_start(gptimer);
+ omap_dm_timer_set_load_start(gptimer, 1, 0xffffffff - period);
break;
case CLOCK_EVT_MODE_ONESHOT:
break;
@@ -172,8 +170,7 @@ static void __init omap2_gp_clocksource_init(void)
tick_rate = clk_get_rate(omap_dm_timer_get_fclk(gpt));
tick_period = (tick_rate / HZ) - 1;
- omap_dm_timer_set_load(gpt, 1, 0);
- omap_dm_timer_start(gpt);
+ omap_dm_timer_set_load_start(gpt, 1, 0);
clocksource_gpt.mult =
clocksource_khz2mult(tick_rate/1000, clocksource_gpt.shift);
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 822b6bb5c74c..f22506af0e67 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -546,6 +546,24 @@ void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
}
+/* Optimized set_load which removes costly spin wait in timer_start */
+void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload,
+ unsigned int load)
+{
+ u32 l;
+
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ if (autoreload)
+ l |= OMAP_TIMER_CTRL_AR;
+ else
+ l &= ~OMAP_TIMER_CTRL_AR;
+ l |= OMAP_TIMER_CTRL_ST;
+
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, load);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+}
+
void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
unsigned int match)
{
@@ -560,7 +578,6 @@ void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
}
-
void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
int toggle, int trigger)
{
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