Fixes: 57e7775413 ("video: backlight: Parse PWM polarity cell")

set_pwm will always fail with -ENOSYS if pwm_set_invert is not implemented, leaving the backlight dark. Fix this by returning no error if pwm_set_invert is not implemented and no polarity change is requested.

v2: simplify logic

Signed-off-by: Marc Dietrich marvin24@gmx.de --- drivers/video/pwm_backlight.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/video/pwm_backlight.c b/drivers/video/pwm_backlight.c index a587977c22..ad20bf2441 100644 --- a/drivers/video/pwm_backlight.c +++ b/drivers/video/pwm_backlight.c @@ -67,6 +67,9 @@ static int set_pwm(struct pwm_backlight_priv *priv) return log_ret(ret);

ret = pwm_set_invert(priv->pwm, priv->channel, priv->polarity); + if (ret == -ENOSYS && !priv->polarity) + ret = 0; + return log_ret(ret); }