From: Yannick Fertre <yannick.fertre@xxxxxxxxxxx> Add new property to set a brightness by default at probe. Reviewed-by: Philippe CORNU <philippe.cornu@xxxxxxxxxxx> Signed-off-by: Yannick Fertre <yannick.fertre@xxxxxxxxxxx> Signed-off-by: Alexandru Ardelean <alex@xxxxxxxxxxx> --- Link to original patch: https://github.com/STMicroelectronics/linux/commit/c4067d7bd883c6fa14ffd49892c4ce663cdafe98 drivers/video/backlight/gpio_backlight.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c index 6f78d928f054..d3fa3a8bef4d 100644 --- a/drivers/video/backlight/gpio_backlight.c +++ b/drivers/video/backlight/gpio_backlight.c @@ -53,6 +53,7 @@ static int gpio_backlight_probe(struct platform_device *pdev) struct backlight_device *bl; struct gpio_backlight *gbl; int ret, init_brightness, def_value; + u32 value; gbl = devm_kzalloc(dev, sizeof(*gbl), GFP_KERNEL); if (gbl == NULL) @@ -93,7 +94,11 @@ static int gpio_backlight_probe(struct platform_device *pdev) else bl->props.power = FB_BLANK_UNBLANK; - bl->props.brightness = 1; + ret = device_property_read_u32(dev, "default-brightness-level", &value); + if (!ret && value <= props.max_brightness) + bl->props.brightness = value; + else + bl->props.brightness = 1; init_brightness = backlight_get_brightness(bl); ret = gpiod_direction_output(gbl->gpiod, init_brightness); -- 2.40.1
