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Commit d1915d9c authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Greg Kroah-Hartman
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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: 757642f9 ("gpio: mvebu: Add limited PWM support")
Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarBartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 3fdd67e8

drivers/gpio/gpio-mvebu.c

+3 −0
Original line number Diff line number Diff line
@@ -697,6 +697,9 @@ 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)