diff options
| author | Lokesh Vutla <lokeshvutla@ti.com> | 2020-03-12 09:52:08 +0530 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2020-03-30 18:03:07 +0200 |
| commit | 867beb60d131f7a5cde88ba375338285fdc6ddb8 (patch) | |
| tree | 4d4f2a8f396989c859611fe915829a1f25e5bb49 /drivers/pwm | |
| parent | 348fb6f7fb4cc7ebc35d1cde6e5c2ada64b683c6 (diff) | |
| download | linux-867beb60d131f7a5cde88ba375338285fdc6ddb8.tar.bz2 | |
pwm: omap-dmtimer: Fix PWM enabling sequence
To configure DM timer in PWM mode the following needs to be set in
OMAP_TIMER_CTRL_REG using set_pwm callback:
- Set toggle mode on PORTIMERPWM output pin
- Set trigger on overflow and match on PORTIMERPWM output pin.
- Set auto reload
This is a one time configuration and needs to be set before the start of
the DM timer. But the current driver tries to set the same configuration
for every period/duty cycle update, which is not needed. So move the PWM
setup before enabling timer and do not update it in
pwm_omap_dmtimer_config().
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-omap-dmtimer.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/pwm/pwm-omap-dmtimer.c b/drivers/pwm/pwm-omap-dmtimer.c index 92aac6c86b95..85b17b49980b 100644 --- a/drivers/pwm/pwm-omap-dmtimer.c +++ b/drivers/pwm/pwm-omap-dmtimer.c @@ -81,6 +81,11 @@ static int pwm_omap_dmtimer_enable(struct pwm_chip *chip, struct pwm_omap_dmtimer_chip *omap = to_pwm_omap_dmtimer_chip(chip); mutex_lock(&omap->mutex); + omap->pdata->set_pwm(omap->dm_timer, + pwm_get_polarity(pwm) == PWM_POLARITY_INVERSED, + true, OMAP_TIMER_TRIGGER_OVERFLOW_AND_COMPARE, + true); + pwm_omap_dmtimer_start(omap); mutex_unlock(&omap->mutex); @@ -197,11 +202,6 @@ static int pwm_omap_dmtimer_config(struct pwm_chip *chip, dev_dbg(chip->dev, "load value: %#08x (%d), match value: %#08x (%d)\n", load_value, load_value, match_value, match_value); - omap->pdata->set_pwm(omap->dm_timer, - pwm_get_polarity(pwm) == PWM_POLARITY_INVERSED, - true, OMAP_TIMER_TRIGGER_OVERFLOW_AND_COMPARE, - true); - /* If config was called while timer was running it must be reenabled. */ if (timer_active) pwm_omap_dmtimer_start(omap); |