From: Dylan Van Assche <me@xxxxxxxxxxxxxxxxx>
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>
---
drivers/leds/leds-gpio.c | 3 ++-
include/linux/leds.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 93f5b1b60fde..0d66f19d71ba 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -96,7 +96,8 @@ 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_ON : LED_OFF;
+ led_dat->cdev.max_brightness = LED_ON;
if (!template->retain_state_suspended)
led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
if (template->panic_indicator)
diff --git a/include/linux/leds.h b/include/linux/leds.h
index 6a8d6409c993..43f0cac2a87b 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -514,6 +514,7 @@ struct gpio_led {
const char *name;
const char *default_trigger;
unsigned gpio;
+ unsigned max_brightness;
unsigned active_low : 1;
unsigned retain_state_suspended : 1;
unsigned panic_indicator : 1;
--
2.26.2
