| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.17 128/158] gpio: mvebu/pwm: Refuse requests with inverted polarity | Date | Mon, 23 May 2022 19:04:45 +0200 |
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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) -- 2.35.1
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