linux-kernel - Re: [PATCH v2] dt-bindings: leds: Allow differently named multicolor leds

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Message-ID: <20250412171237.GA1347507-robh@kernel.org>
Date: Sat, 12 Apr 2025 12:12:37 -0500
From: Rob Herring <robh@...nel.org>
To: J. Neuschäfer <j.ne@...teo.net>
Cc: Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Andrew Davis <afd@...com>,
	Pavel Machek <pavel@...nel.org>, linux-leds@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v2] dt-bindings: leds: Allow differently named multicolor
 leds

On Sat, Apr 12, 2025 at 03:04:32PM +0200, J. Neuschäfer wrote:
> In some cases, for example when using multiple instances of
> leds-group-multicolor, a board may have multiple multi-leds which can't
> be distinguished by unit address. In such cases it should be possible to
> name them differently, for example multi-led-a and multi-led-b. This
> patch adds another node name pattern to leds-class-multicolor.yaml to
> allow such names.

Really, multi-led-0, multi-led-1, etc. would be preferred like we have 
in other places.

> 
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Signed-off-by: J. Neuschäfer <j.ne@...teo.net>
> ---
> V2:
> - Add Krzysztof's review tag
> - mention leds-group-multicolor in the commit message
> - rebase on 6.15-rc1
> 
> Link to v1: https://lore.kernel.org/r/20250209-multi-led-v1-1-5aebccbd2db7@posteo.net
> ---
>  Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml b/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml
> index bb40bb9e036ee00e06d21e2321ecd5a7d471c408..c22af25b6430be71300c0e37f696cd61112ea190 100644
> --- a/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml
> +++ b/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml
> @@ -21,7 +21,9 @@ description: |
>  
>  properties:
>    $nodename:
> -    pattern: "^multi-led(@[0-9a-f])?$"
> +    oneOf:
> +      - pattern: "^multi-led(@[0-9a-f])?$"
> +      - pattern: "^multi-led-.*$"

Combine these:

'^multi-led(-.+|@[0-9a-f])?$'

oneOf is best avoided because the error messages aren't so great.

>  
>    color:
>      description: |
> 
> ---
> base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
> change-id: 20250209-multi-led-9991e205befd
> 
> Best regards,
> -- 
> J. Neuschäfer <j.ne@...teo.net>
>