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pwm: sprd: Refuse requests with unsupported polarity

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The driver only supports normal polarity and so should refuse requests
for inversed polarity.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Uwe Kleine-König 2021-03-12 09:59:16 +01:00 committed by Thierry Reding
parent c77e99f434
commit 09081c9ba6
1 changed files with 3 additions and 0 deletions
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3
drivers/pwm/pwm-sprd.c
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@ -164,6 +164,9 @@ static int sprd_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
struct pwm_state *cstate = &pwm->state;
int ret;
if (state->polarity != PWM_POLARITY_NORMAL)
return -EINVAL;
if (state->enabled) {
if (!cstate->enabled) {
/*