diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2021-07-01 10:27:51 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-28 13:30:53 +0200 |
| commit | ae9b64434441e7d2fca1a7f623e15f289d9a8021 (patch) | |
| tree | efbe2db9412bb6e4e7e3dd82431c3ddfcb1e8b75 /drivers/pwm | |
| parent | a37ca2a076ec7c6869824c33c3f15aab5fa16720 (diff) | |
pwm: sprd: Ensure configuring period and duty_cycle isn't wrongly skipped
[ Upstream commit 65e2e6c1c20104ed19060a38f4edbf14e9f9a9a5 ]
As the last call to sprd_pwm_apply() might have exited early if
state->enabled was false, the values for period and duty_cycle stored in
pwm->state might not have been written to hardware and it must be
ensured that they are configured before enabling the PWM.
Fixes: 8aae4b02e8a6 ("pwm: sprd: Add Spreadtrum PWM support")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-sprd.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/pwm/pwm-sprd.c b/drivers/pwm/pwm-sprd.c index be2394227423..892d853d48a1 100644 --- a/drivers/pwm/pwm-sprd.c +++ b/drivers/pwm/pwm-sprd.c @@ -180,13 +180,10 @@ static int sprd_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, } } - if (state->period != cstate->period || - state->duty_cycle != cstate->duty_cycle) { - ret = sprd_pwm_config(spc, pwm, state->duty_cycle, - state->period); - if (ret) - return ret; - } + ret = sprd_pwm_config(spc, pwm, state->duty_cycle, + state->period); + if (ret) + return ret; sprd_pwm_write(spc, pwm->hwpwm, SPRD_PWM_ENABLE, 1); } else if (cstate->enabled) { |