diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2022-05-11 09:58:56 +0200 |
|---|---|---|
| committer | Bartosz Golaszewski <brgl@bgdev.pl> | 2022-05-20 16:46:56 +0200 |
| commit | 3ecb10175b1f776f076553c24e2689e42953fef5 (patch) | |
| tree | d696d5dd2ab63fa66df71b9585deb9469ccbfe7f | |
| parent | 9bf3ac466faa83d51a8fe9212131701e58fdef74 (diff) | |
| download | linux-3ecb10175b1f776f076553c24e2689e42953fef5.tar.bz2 | |
gpio: mvebu/pwm: Refuse requests with inverted polarity
The driver doesn't take struct pwm_state::polarity into account when
configuring the hardware, so refuse requests for inverted polarity.
Fixes: 757642f9a584 ("gpio: mvebu: Add limited PWM support")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
| -rw-r--r-- | drivers/gpio/gpio-mvebu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c index a2c8dd329b31..2db19cd640a4 100644 --- a/drivers/gpio/gpio-mvebu.c +++ b/drivers/gpio/gpio-mvebu.c @@ -707,6 +707,9 @@ static int mvebu_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, unsigned long flags; unsigned int on, off; + if (state->polarity != PWM_POLARITY_NORMAL) + return -EINVAL; + val = (unsigned long long) mvpwm->clk_rate * state->duty_cycle; do_div(val, NSEC_PER_SEC); if (val > UINT_MAX + 1ULL) |