Commit f1670336 authored by Markus Hofstaetter's avatar Markus Hofstaetter Committed by Jacek Anaszewski

leds: call led_pwm_set() in leds-pwm to enforce default LED_OFF

Some PWMs are disabled by default or the default pin setting
does not match the LED_OFF state (e.g., active-low leds).
Hence, the driver may end up reporting 0 brightness, but
the leds are actually on using full brightness, because
it never enforces its default configuration.
So enforce it by calling led_pwm_set() after successfully
registering the device.

Tested on a Phytec phyFLEX i.MX6Q board based on kernel
v3.19.5.
Signed-off-by: default avatarMarkus Hofstaetter <markus.hofstaetter@ait.ac.at>
Tested-by: default avatarMarkus Hofstaetter <markus.hofstaetter@ait.ac.at>
Signed-off-by: default avatarJacek Anaszewski <j.anaszewski@samsung.com>
parent fb65ee94
...@@ -124,6 +124,7 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv, ...@@ -124,6 +124,7 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
ret = led_classdev_register(dev, &led_data->cdev); ret = led_classdev_register(dev, &led_data->cdev);
if (ret == 0) { if (ret == 0) {
priv->num_leds++; priv->num_leds++;
led_pwm_set(&led_data->cdev, led_data->cdev.brightness);
} else { } else {
dev_err(dev, "failed to register PWM led for %s: %d\n", dev_err(dev, "failed to register PWM led for %s: %d\n",
led->name, ret); led->name, ret);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment