From 1e70037db5af0df6d878206541273cae0c4bf3f8 Mon Sep 17 00:00:00 2001 From: Uwe Kleine-König Date: Wed, 11 May 2022 09:58:56 +0200 Subject: gpio: mvebu/pwm: Refuse requests with inverted polarity MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit [ 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 Signed-off-by: Bartosz Golaszewski Signed-off-by: Sasha Levin --- drivers/gpio/gpio-mvebu.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers') 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) -- cgit v1.2.3