Commit 8cb08101 authored by George Stark's avatar George Stark Committed by Lee Jones
Browse files

leds: pwm: Add optional DT property default-brightness 



When probing if default LED state is on then default brightness will be
applied instead of max brightness.

Signed-off-by: default avatarGeorge Stark <gnstark@salutedevices.com>
Link: https://lore.kernel.org/r/20241105185006.1380166-3-gnstark@salutedevices.com


Signed-off-by: default avatarLee Jones <lee@kernel.org>
parent 44e04fb8

drivers/leds/leds-pwm.c

+16 −1
Original line number Diff line number Diff line
@@ -62,6 +62,20 @@ static int led_pwm_set(struct led_classdev *led_cdev, 
	return pwm_apply_might_sleep(led_dat->pwm, &led_dat->pwmstate);

}



static int led_pwm_default_brightness_get(struct fwnode_handle *fwnode,

					  int max_brightness)

{

	unsigned int default_brightness;

	int ret;



	ret = fwnode_property_read_u32(fwnode, "default-brightness",

				       &default_brightness);

	if (ret < 0 || default_brightness > max_brightness)

		default_brightness = max_brightness;



	return default_brightness;

}



__attribute__((nonnull))

static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,

		       struct led_pwm *led, struct fwnode_handle *fwnode)
@@ -103,7 +117,8 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv, 
	/* set brightness */

	switch (led->default_state) {

	case LEDS_DEFSTATE_ON:

		led_data->cdev.brightness = led->max_brightness;

		led_data->cdev.brightness =

			led_pwm_default_brightness_get(fwnode, led->max_brightness);

		break;

	case LEDS_DEFSTATE_KEEP:

		{