active-low is an optional property to describe PWMs where the LED is wired
to supply rather than ground. Add barebox support for it.
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
drivers/led/led-pwm.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/led/led-pwm.c b/drivers/led/led-pwm.c
index 419d96eed392..8a358dde88b3 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);
}
@@ -66,6 +69,7 @@ static int led_pwm_of_probe(struct device_d *dev)
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;
--
2.25.0
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