diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2021-07-01 10:27:52 +0200 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2021-07-08 16:08:38 +0200 |
| commit | fe8255f80b8617bc67a58f4ca2b54b3b9b32ff84 (patch) | |
| tree | ea66e146519fc85ec9169bbfc5c32d7166322a11 /drivers/pwm/pwm-spear.c | |
| parent | 65e2e6c1c20104ed19060a38f4edbf14e9f9a9a5 (diff) | |
| download | lwn-fe8255f80b8617bc67a58f4ca2b54b3b9b32ff84.tar.gz lwn-fe8255f80b8617bc67a58f4ca2b54b3b9b32ff84.zip | |
pwm: spear: Ensure configuring period and duty_cycle isn't wrongly skipped
As the last call to spear_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: 98761ce4b91b ("pwm: spear: Implement .apply() callback")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm/pwm-spear.c')
| -rw-r--r-- | drivers/pwm/pwm-spear.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/pwm/pwm-spear.c b/drivers/pwm/pwm-spear.c index 48c31dac2f32..54c7990967dd 100644 --- a/drivers/pwm/pwm-spear.c +++ b/drivers/pwm/pwm-spear.c @@ -177,12 +177,9 @@ static int spear_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, return 0; } - if (state->period != pwm->state.period || - state->duty_cycle != pwm->state.duty_cycle) { - err = spear_pwm_config(chip, pwm, state->duty_cycle, state->period); - if (err) - return err; - } + err = spear_pwm_config(chip, pwm, state->duty_cycle, state->period); + if (err) + return err; if (!pwm->state.enabled) return spear_pwm_enable(chip, pwm); |