linux-kernel - Re: [PATCH v26 01/15] dt: bindings: Add multicolor class dt bindings documention

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Message-ID: <20200604224026.GA4153787@bogus>
Date:   Thu, 4 Jun 2020 16:40:26 -0600
From:   Rob Herring <robh@...nel.org>
To:     Dan Murphy <dmurphy@...com>
Cc:     jacek.anaszewski@...il.com, pavel@....cz,
        devicetree@...r.kernel.org, linux-leds@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v26 01/15] dt: bindings: Add multicolor class dt bindings
 documention

On Thu, Jun 04, 2020 at 07:04:50AM -0500, Dan Murphy wrote:
> Add DT bindings for the LEDs multicolor class framework.
> Add multicolor ID to the color ID list for device tree bindings.
> 
> CC: Rob Herring <robh@...nel.org>
> Acked-by: Pavel Machek <pavel@....cz>
> Acked-by: Jacek Anaszewski <jacek.anaszewski@...il.com>
> Signed-off-by: Dan Murphy <dmurphy@...com>
> ---
>  .../bindings/leds/leds-class-multicolor.yaml  | 39 +++++++++++++++++++
>  include/dt-bindings/leds/common.h             |  3 +-
>  2 files changed, 41 insertions(+), 1 deletion(-)
>  create mode 100644 Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml
> 
> diff --git a/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml b/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml
> new file mode 100644
> index 000000000000..6cab2a1405e1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml
> @@ -0,0 +1,39 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/leds/leds-class-multicolor.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Common properties for the multicolor LED class.
> +
> +maintainers:
> +  - Dan Murphy <dmurphy@...com>
> +
> +description: |
> +  Bindings for multi color LEDs show how to describe current outputs of
> +  either integrated multi-color LED elements (like RGB, RGBW, RGBWA-UV
> +  etc.) or standalone LEDs, to achieve logically grouped multi-color LED
> +  modules. This is achieved by adding multi-led nodes layer to the
> +  monochrome LED bindings.
> +  The nodes and properties defined in this document are unique to the multicolor
> +  LED class.  Common LED nodes and properties are inherited from the common.txt
> +  within this documentation directory.
> +
> +patternProperties:
> +  "^multi-led@([0-9a-f])$":
> +    type: object
> +    description: Represents the LEDs that are to be grouped.
> +    properties:
> +      #allOf:
> +        #- $ref: "common.yaml#"

Why is this commented out? Other than it is wrong. Uncommented, this 
would be defining a DT property called 'allOf'.

You can drop 'allOf' now. '$ref' should be at the level of 'properties'.

> +
> +      color:
> +        $ref: /schemas/types.yaml#definitions/uint32

common.yaml already defines the type, so drop this.

> +        const: 8  # LED_COLOR_ID_MULTI
> +        description: |
> +          For multicolor LED support this property should be defined as
> +          LED_COLOR_ID_MULTI which can be found in include/linux/leds/common.h.
> +
> +    required:
> +      - color
> +...
> diff --git a/include/dt-bindings/leds/common.h b/include/dt-bindings/leds/common.h
> index 0ce7dfc00dcb..a463ce6a8794 100644
> --- a/include/dt-bindings/leds/common.h
> +++ b/include/dt-bindings/leds/common.h
> @@ -30,7 +30,8 @@
>  #define LED_COLOR_ID_VIOLET	5
>  #define LED_COLOR_ID_YELLOW	6
>  #define LED_COLOR_ID_IR		7
> -#define LED_COLOR_ID_MAX	8
> +#define LED_COLOR_ID_MULTI	8
> +#define LED_COLOR_ID_MAX	9
>  
>  /* Standard LED functions */
>  /* Keyboard LEDs, usually it would be input4::capslock etc. */
> -- 
> 2.26.2
>