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pwm: cros-ec: 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: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Uwe Kleine-König 2021-03-12 10:00:58 +01:00 • committed by Thierry Reding
parent 09081c9ba6
commit 9f0f6107e0
1 changed files with 3 additions and 0 deletions
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3
drivers/pwm/pwm-cros-ec.c
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@ -124,6 +124,9 @@ static int cros_ec_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
if (state->period != EC_PWM_MAX_DUTY)
return -EINVAL;
if (state->polarity != PWM_POLARITY_NORMAL)
return -EINVAL;
/*
* EC doesn't separate the concept of duty cycle and enabled, but
* kernel does. Translate.