The following commit has been merged into the timers/core branch of tip: Commit-ID: aff7665dc64b60c1f93d6e52fde297ae6b8999ae Gitweb: https://git.kernel.org/tip/aff7665dc64b60c1f93d6e52fde297ae6b8999ae Author: Lokesh Vutla <lokeshvutla@xxxxxx> AuthorDate: Thu, 05 Mar 2020 13:57:13 +05:30 Committer: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx> CommitterDate: Mon, 16 Mar 2020 12:40:36 +01:00 clocksource/drivers/timer-ti-dm: Do not update counter on updating the period 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. Tested-by: Tony Lindgren <tony@xxxxxxxxxxx> Signed-off-by: Lokesh Vutla <lokeshvutla@xxxxxx> Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx> Link: https://lore.kernel.org/r/20200305082715.15861-5-lokeshvutla@xxxxxx --- drivers/clocksource/timer-ti-dm.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c index 1d1bea7..b565b84 100644 --- a/drivers/clocksource/timer-ti-dm.c +++ b/drivers/clocksource/timer-ti-dm.c @@ -579,7 +579,6 @@ 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); omap_dm_timer_disable(timer); return 0; }
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