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leds: pwm: Add optional DT property default-brightness

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

Signed-off-by: George Stark <gnstark@salutedevices.com>
Link: https://lore.kernel.org/r/20241105185006.1380166-3-gnstark@salutedevices.com
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
George Stark 2024-11-05 21:50:06 +03:00 committed by Lee Jones
parent 44e04fb8d6
commit 8cb0810183
1 changed files with 16 additions and 1 deletions
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17
drivers/leds/leds-pwm.c
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@ -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:
{