diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2022-05-11 10:58:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-25 09:41:21 +0300 |
| commit | 1e70037db5af0df6d878206541273cae0c4bf3f8 (patch) | |
| tree | 5b4177de3bf69c57eafec5ae7d37f0e0c10c63b5 /drivers | |
| parent | 6bfcb2b9624c30cf4459dec169f454b3058c7f50 (diff) | |
| download | linux-1e70037db5af0df6d878206541273cae0c4bf3f8.tar.xz | |
gpio: mvebu/pwm: Refuse requests with inverted polarity
[ Upstream commit 3ecb10175b1f776f076553c24e2689e42953fef5 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -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 b14d481ab7db..cbad11029c67 100644 --- a/drivers/gpio/gpio-mvebu.c +++ b/drivers/gpio/gpio-mvebu.c @@ -694,6 +694,9 @@ 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) |