diff options
Diffstat (limited to 'drivers/led/led-pwm.c')
| -rw-r--r-- | drivers/led/led-pwm.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/led/led-pwm.c b/drivers/led/led-pwm.c index 16d22b5569..8a358dde88 100644 --- a/drivers/led/led-pwm.c +++ b/drivers/led/led-pwm.c @@ -41,6 +41,9 @@ static void led_pwm_set(struct led *led, unsigned int brightness) duty *= brightness; do_div(duty, max); + if (pwmled->active_low) + duty = pwmled->period - duty; + pwm_config(pwmled->pwm, duty, pwmled->period); } @@ -54,16 +57,19 @@ static int led_pwm_of_probe(struct device_d *dev) struct pwm_device *pwm; pwm = of_pwm_request(child, NULL); - if (pwm < 0) + if (IS_ERR(pwm)) continue; pwmled = xzalloc(sizeof(*pwmled)); pwmled->led.name = xstrdup(child->name); pwmled->pwm = pwm; - of_property_read_u32(child, "max-brightness", &pwmled->led.max_value); + ret = of_property_read_u32(child, "max-brightness", &pwmled->led.max_value); + if (ret) + return ret; pwmled->period = pwm_get_period(pwmled->pwm); + pwmled->active_low = of_property_read_bool(child, "active-low"); pwmled->led.set = led_pwm_set; |