GPIO LEDs only know 2 states: ON or OFF and do not have PWM capabilities.
However, the max brightness is reported as 255.
This patch sets the max brightness value of a GPIO controlled LED to 1.
Tested on my PinePhone 1.2.
Signed-off-by: Dylan Van Assche <me@xxxxxxxxxxxxxxxxx>
---
v2 drops an obsolete change in include/linux/leds.h
v3 simplifies the patch for better readability
drivers/leds/leds-gpio.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 93f5b1b60fde..242bb38cadee 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -96,7 +96,9 @@ static int create_gpio_led(const struct gpio_led *template,
} else {
state = (template->default_state == LEDS_GPIO_DEFSTATE_ON);
}
- led_dat->cdev.brightness = state ? LED_FULL : LED_OFF;
+ led_dat->cdev.brightness = state;
+ led_dat->cdev.max_brightness = 1;
+
if (!template->retain_state_suspended)
led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
if (template->panic_indicator)
--
2.30.0
