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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2022-05-11 09:58:56 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-25 09:14:37 +0200 |
| commit | d1915d9c9fa3b2690c1092fce1b78d5e63adc983 (patch) | |
| tree | 4c3b9f11e94658b0fd627d3059b2cd9397a7c4dc /drivers/gpio/gpio-mvebu.c | |
| parent | 3fdd67e83c4221408dea5c3de330d1644f699732 (diff) | |
| download | linux-stable-d1915d9c9fa3b2690c1092fce1b78d5e63adc983.tar.gz linux-stable-d1915d9c9fa3b2690c1092fce1b78d5e63adc983.tar.bz2 linux-stable-d1915d9c9fa3b2690c1092fce1b78d5e63adc983.zip | |
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: 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>
Diffstat (limited to 'drivers/gpio/gpio-mvebu.c')
| -rw-r--r-- | drivers/gpio/gpio-mvebu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c index 89a053b1d279..b5ae28fce9a8 100644 --- a/drivers/gpio/gpio-mvebu.c +++ b/drivers/gpio/gpio-mvebu.c @@ -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) |