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| author | Markus Hofstaetter <markus.hofstaetter@ait.ac.at> | 2015-11-11 12:40:29 +0100 |
|---|---|---|
| committer | Jacek Anaszewski <j.anaszewski@samsung.com> | 2016-01-04 09:57:36 +0100 |
| commit | f16703360da7731a057df2ffa902306819c22398 (patch) | |
| tree | bad958970dbfa9c83d2f079304efd8822ffed893 | |
| parent | fb65ee94ee3ae8fde4922262f73dddea2172e3ef (diff) | |
| download | linux-f16703360da7731a057df2ffa902306819c22398.tar.gz linux-f16703360da7731a057df2ffa902306819c22398.tar.bz2 linux-f16703360da7731a057df2ffa902306819c22398.zip | |
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: Markus Hofstaetter <markus.hofstaetter@ait.ac.at>
Tested-by: Markus Hofstaetter <markus.hofstaetter@ait.ac.at>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
| -rw-r--r-- | drivers/leds/leds-pwm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c index bc501930b54b..410ff0468245 100644 --- a/drivers/leds/leds-pwm.c +++ b/drivers/leds/leds-pwm.c @@ -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); if (ret == 0) { priv->num_leds++; + led_pwm_set(&led_data->cdev, led_data->cdev.brightness); } else { dev_err(dev, "failed to register PWM led for %s: %d\n", led->name, ret); |