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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2022-05-11 09:58:56 +0200
committerBartosz Golaszewski <brgl@bgdev.pl>2022-05-20 16:46:56 +0200
commit3ecb10175b1f776f076553c24e2689e42953fef5 (patch)
treed696d5dd2ab63fa66df71b9585deb9469ccbfe7f
parent9bf3ac466faa83d51a8fe9212131701e58fdef74 (diff)
downloadlinux-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.c3
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)