[06/21] clocksource/drivers/timer-ti-dm: Do not update counter on updating the period
diff mbox series

Message ID 20200318174131.20582-6-daniel.lezcano@linaro.org
State Accepted
Commit 6ce4fcb015a1a1290ffafcf3554901b40f9322df
Headers show
Series
  • [01/21] clocksource/drivers/fttmr010: Parametrise shutdown
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Commit Message

Daniel Lezcano March 18, 2020, 5:41 p.m. UTC 
From: Lokesh Vutla <lokeshvutla@ti.com>

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>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200224050753.17784-3-lokeshvutla@ti.com
---
 drivers/clocksource/timer-ti-dm.c | 1 -
 1 file changed, 1 deletion(-)

Patch
diff mbox series 

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index 269a994d6a99..acc93600d351 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -577,7 +577,6 @@  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;