[2/2] clocksource: timer-ti-dm: Do not update counter on updating the period

Message ID 20200224050753.17784-3-lokeshvutla@ti.com
State New
Headers show
Series
  • Untitled series #38068
Related show

Commit Message

Lokesh Vutla Feb. 24, 2020, 5:07 a.m.
Write to trigger register(OMAP_TIMER_TRIGGER_REG) will load the value
in Load register(OMAP_TIMER_LOAD_REG) into Counter register
(OMAP_TIMER_COUNTER_REG).

omap_dm_timer_set_load() writes into trigger register every time load
register is updated. When timer is configured in pwm mode, this causes
disruption in current pwm cycle, which is not expected especially when
pwm is used as PPS signal for synchronized PTP clocks. So do not write
into trigger register on updating the period.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
---
 drivers/clocksource/timer-ti-dm.c | 1 -
 1 file changed, 1 deletion(-)

Patch

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index 40742715ed21..62b145ef3bb8 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -574,7 +574,6 @@  static int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 	omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
 
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
 	/* Save the context */
 	timer->context.tclr = l;
 	timer->context.tldr = load;