From: Alexandre Belloni Date: Mon, 19 May 2014 20:42:42 +0000 (+0200) Subject: pwm-backlight: retrieve configured PWM period X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=16fc3352ea58b481f879f8d965b98208ccc279c2;p=linux-beck.git pwm-backlight: retrieve configured PWM period The PWM core is now able to initialize the PWM period from a lookup table defined by board files. Use it if available and fallback to the value supplied in pwm_period_ns. Signed-off-by: Alexandre Belloni Signed-off-by: Thierry Reding --- diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index cc49347bbcc0..38ca88bc5c3e 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -296,12 +296,15 @@ static int pwm_backlight_probe(struct platform_device *pdev) /* * The DT case will set the pwm_period_ns field to 0 and store the * period, parsed from the DT, in the PWM device. For the non-DT case, - * set the period from platform data. + * set the period from platform data if it has not already been set + * via the PWM lookup table. */ - if (data->pwm_period_ns > 0) + pb->period = pwm_get_period(pb->pwm); + if (!pb->period && (data->pwm_period_ns > 0)) { + pb->period = data->pwm_period_ns; pwm_set_period(pb->pwm, data->pwm_period_ns); + } - pb->period = pwm_get_period(pb->pwm); pb->lth_brightness = data->lth_brightness * (pb->period / pb->scale); memset(&props, 0, sizeof(struct backlight_properties));