From: Uwe Kleine-König u.kleine-koenig@pengutronix.de
[ 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 --- drivers/gpio/gpio-mvebu.c | 3 +++ 1 file changed, 3 insertions(+)
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)