linux-kernel - Re: [PATCH 3/4] dt-bindings: leds: Add binding for a multicolor group of LEDs

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Date:   Mon, 27 Jun 2022 16:12:57 -0600
From:   Rob Herring <robh@...nel.org>
To:     Jean-Jacques Hiblot <jjhiblot@...phandler.com>
Cc:     pavel@....cz, sven.schwermer@...ruptive-technologies.com,
        krzysztof.kozlowski+dt@...aro.org, johan+linaro@...nel.org,
        marijn.suijten@...ainline.org, bjorn.andersson@...aro.org,
        andy.shevchenko@...il.com, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] dt-bindings: leds: Add binding for a multicolor
 group of LEDs

On Wed, Jun 15, 2022 at 05:49:17PM +0200, Jean-Jacques Hiblot wrote:
> This allows to group multiple monochromatic LEDs into a multicolor
> LED, e.g. RGB LEDs.
> 
> Signed-off-by: Jean-Jacques Hiblot <jjhiblot@...phandler.com>
> ---
>  .../bindings/leds/leds-group-multicolor.yaml  | 94 +++++++++++++++++++
>  1 file changed, 94 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/leds/leds-group-multicolor.yaml
> 
> diff --git a/Documentation/devicetree/bindings/leds/leds-group-multicolor.yaml b/Documentation/devicetree/bindings/leds/leds-group-multicolor.yaml
> new file mode 100644
> index 000000000000..30a67985ae33
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/leds-group-multicolor.yaml
> @@ -0,0 +1,94 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/leds/leds-group-multicolor.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Multi-color LED built with monochromatic LEDs
> +
> +maintainers:
> +  - Jean-Jacques Hiblot <jjhiblot@...phandler.com>
> +
> +description: |
> +  This driver combines several monochromatic LEDs into one multi-color
> +  LED using the multicolor LED class.
> +
> +properties:
> +  compatible:
> +    const: leds-group-multicolor
> +
> +  multi-led:
> +    type: object
> +
> +    patternProperties:
> +      "^led-[0-9a-z]+$":
> +        type: object
> +        $ref: common.yaml#
> +
> +        additionalProperties: false
> +
> +        properties:
> +          leds:

Not a standard property. What is the type?

Really, just do a GPIO multi-color LED binding similar to the PWM one 
rather than adding this layer. I suppose you could combine LEDs from all 
different controllers, but that seems somewhat unlikely to me.

Rob