[PATCH v2] leds: gpio: Set max brightness to 1

From: Dylan Van Assche
Date: Tue Dec 29 2020 - 09:26:22 EST


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

drivers/leds/leds-gpio.c | 3 ++-
1 file changed, 2 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)
--
2.26.2