Re: [PATCH v4 1/9] dt-bindings: display: renesas,cmm: Add R-Car CMM documentation

[Rob Herring <robh@kernel.org>]

On Fri, Sep 06, 2019 at 03:54:28PM +0200, Jacopo Mondi wrote:
> Add device tree bindings documentation for the Renesas R-Car Display
> Unit Color Management Module.
> 
> CMM is the image enhancement module available on each R-Car DU video
> channel on R-Car Gen2 and Gen3 SoCs (V3H and V3M excluded).
> 
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> ---
>  .../bindings/display/renesas,cmm.yaml         | 64 +++++++++++++++++++
>  1 file changed, 64 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/renesas,cmm.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/renesas,cmm.yaml b/Documentation/devicetree/bindings/display/renesas,cmm.yaml
> new file mode 100644
> index 000000000000..9e5922689cd7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/renesas,cmm.yaml
> @@ -0,0 +1,64 @@
> +# SPDX-License-Identifier: GPL-2.0

For new bindings:

GPL-2.0-only OR BSD-2-Clause

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/renesas,cmm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Renesas R-Car Color Management Module (CMM)
> +
> +maintainers:
> +  - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> +  - Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> +  - Jacopo Mondi <jacopo+renesas@jmondi.org>
> +
> +description: |+
> +  Renesas R-Car color management module connected to R-Car DU video channels.
> +  It provides image enhancement functions such as 1-D look-up tables (LUT),
> +  3-D look-up tables (CMU), 1D-histogram generation (HGO), and color
> +  space conversion (CSC).
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +        - renesas,r8a7795-cmm
> +        - renesas,r8a7796-cmm
> +        - renesas,r8a77965-cmm
> +        - renesas,r8a77990-cmm
> +        - renesas,r8a77995-cmm
> +      - enum:
> +        - renesas,rcar-gen3-cmm
> +        - renesas,rcar-gen2-cmm

This allows 10 valid cases when I imagine there's only really 5. I'm 
okay leaving it, but might be better to split into 2 under a 'oneOf'.

I imagine there will be a lot of these for Renesas, so just be 
consistent.

> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - resets
> +  - power-domains
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/r8a7796-cpg-mssr.h>
> +    #include <dt-bindings/power/r8a7796-sysc.h>
> +
> +    cmm0: cmm@fea40000 {
> +         compatible = "renesas,r8a7796-cmm";
> +         reg = <0 0xfea40000 0 0x1000>;
> +         power-domains = <&sysc R8A7796_PD_ALWAYS_ON>;
> +         clocks = <&cpg CPG_MOD 711>;
> +         resets = <&cpg 711>;
> +    };
> --
> 2.23.0
>