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clocksource/drivers/timer-ti-dm: Add support to get pwm current status

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omap_dm_timer_ops provide support to configure the pwm but there is no
support to get the current status. For configuring pwm it is advised to
check the current hw status instead of relying on pwm framework. So
implement a new timer ops to get the current status of pwm.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Acked-by: Tony Lindgen <tony@atomide.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200305082715.15861-6-lokeshvutla@ti.com
This commit is contained in:
Lokesh Vutla 2020-03-05 13:57:14 +05:30 • committed by Daniel Lezcano
parent aff7665dc6
commit 92fd86864e
2 changed files with 16 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

15
drivers/clocksource/timer-ti-dm.c
View file

@ -627,6 +627,20 @@ static int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
return 0;
}
static int omap_dm_timer_get_pwm_status(struct omap_dm_timer *timer)
{
u32 l;
if (unlikely(!timer))
return -EINVAL;
omap_dm_timer_enable(timer);
l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
omap_dm_timer_disable(timer);
return l;
}
static int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer,
int prescaler)
{
@ -927,6 +941,7 @@ static const struct omap_dm_timer_ops dmtimer_ops = {
.set_load = omap_dm_timer_set_load,
.set_match = omap_dm_timer_set_match,
.set_pwm = omap_dm_timer_set_pwm,
.get_pwm_status = omap_dm_timer_get_pwm_status,
.set_prescaler = omap_dm_timer_set_prescaler,
.read_counter = omap_dm_timer_read_counter,
.write_counter = omap_dm_timer_write_counter,

1
include/linux/platform_data/dmtimer-omap.h
View file

@ -36,6 +36,7 @@ struct omap_dm_timer_ops {
unsigned int match);
int (*set_pwm)(struct omap_dm_timer *timer, int def_on,
int toggle, int trigger);
int (*get_pwm_status)(struct omap_dm_timer *timer);
int (*set_prescaler)(struct omap_dm_timer *timer, int prescaler);
unsigned int (*read_counter)(struct omap_dm_timer *timer);