Re: [PATCH V3] leds: rgb: leds-group-multicolor: Implement default-intensity

[Lee Jones <lee@kernel.org>]

On Tue, 04 Aug 2026, Stefan Wahren wrote:

> Currently it's not possible to specify the initial color of a LED
> multicolor group during boot. So implement the default-intensity property
> similar to the leds-pwm-multicolor driver. In case the property is
> missing, the old behavior is kept.
> 
> Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
> Reviewed-by: Jonas Rebmann <jre@pengutronix.de>
> ---
> 
> Changes in V3:
> - drop unnecessary patch for leds-group-multicolor.yaml
> - add Jonas' RB
> 
> Changes in V2:
> - adapt to approach (incl. error behavior) by Jonas Rebmann [2]
> - address comments by Lee which still apply
> 
>  drivers/leds/rgb/leds-group-multicolor.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git "a/drivers/leds/rgb/leds-group-multicolor.c" "b/drivers/leds/rgb/leds-group-multicolor.c"
> index 548c7dd63ba1..69b203ec89fa 100644
> --- "a/drivers/leds/rgb/leds-group-multicolor.c"
> +++ "b/drivers/leds/rgb/leds-group-multicolor.c"
> @@ -109,8 +109,14 @@ static int leds_gmc_probe(struct platform_device *pdev)
>  
>  		subled[i].color_index = led_cdev->color;
>  
> -		/* Configure the LED intensity to its maximum */
> -		subled[i].intensity = max_brightness;
> +		ret = fwnode_property_read_u32(led_cdev->dev->fwnode, "default-intensity",

Did you consider using dev_fwnode() or device_property_read_u32()
here instead of accessing 'led_cdev->dev->fwnode' directly?

> +					       &subled[i].intensity);
> +
> +		/* In case default-intensity is missing, fallback to maximum */

Probably stating the obvious here.

> +		if (ret)
> +			subled[i].intensity = max_brightness;
> +		else if (subled[i].intensity > max_brightness)
> +			subled[i].intensity = max_brightness;

if (ret || subled[i].intensity > max_brightness)
	subled[i].intensity = max_brightness;

>  	}
>  
>  	/* Initialise the multicolor's LED class device */
> -- 
> 2.43.0
> 
> 

-- 
Lee Jones