Re: [PATCH v3 03/13] dt-bindings: serial: Add compatible for Renesas RZ/T2H SoC in sci

[Rob Herring <robh@kernel.org>]

On Wed, Feb 26, 2025 at 02:09:22PM +0100, Thierry Bultel wrote:
> Document RZ/T2H (a.k.a r9a09g077) in SCI binding.
> 
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
> Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
> ---
>  .../bindings/serial/renesas,sci.yaml          | 64 ++++++++++++-------
>  1 file changed, 40 insertions(+), 24 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/serial/renesas,sci.yaml b/Documentation/devicetree/bindings/serial/renesas,sci.yaml
> index 64d3db6e54e5..2c4080283963 100644
> --- a/Documentation/devicetree/bindings/serial/renesas,sci.yaml
> +++ b/Documentation/devicetree/bindings/serial/renesas,sci.yaml
> @@ -9,9 +9,6 @@ title: Renesas Serial Communication Interface
>  maintainers:
>    - Geert Uytterhoeven <geert+renesas@glider.be>
>  
> -allOf:
> -  - $ref: serial.yaml#
> -
>  properties:
>    compatible:
>      oneOf:
> @@ -22,6 +19,8 @@ properties:
>                - renesas,r9a07g054-sci     # RZ/V2L
>            - const: renesas,sci            # generic SCI compatible UART
>  
> +      - const: renesas,r9a09g077-sci      # RZ/T2H
> +

Perhaps explain in the commit msg why the 'renesas,sci' is not 
applicable for this chip.

>        - items:
>            - const: renesas,sci            # generic SCI compatible UART
>  
> @@ -54,8 +53,6 @@ properties:
>          - fck # UART functional clock
>          - sck # optional external clock input
>  
> -  uart-has-rtscts: false
> -
>  required:
>    - compatible
>    - reg
> @@ -63,25 +60,44 @@ required:
>    - clocks
>    - clock-names
>  
> -if:
> -  properties:
> -    compatible:
> -      contains:
> -        enum:
> -          - renesas,r9a07g043-sci
> -          - renesas,r9a07g044-sci
> -          - renesas,r9a07g054-sci
> -then:
> -  properties:
> -    resets:
> -      maxItems: 1
> -
> -    power-domains:
> -      maxItems: 1
> -
> -  required:
> -    - resets
> -    - power-domains
> +allOf:
> +  - $ref: serial.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: renesas,r9a09g077-sci
> +    then:
> +      properties:
> +        uart-has-rtscts: true

Drop. It is already allowed.

> +        power-domains:
> +          maxItems: 1
> +      required:
> +        - power-domains
> +
> +    else:
> +      properties:
> +        uart-has-rtscts: false
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - renesas,r9a07g043-sci
> +              - renesas,r9a07g044-sci
> +              - renesas,r9a07g054-sci
> +    then:
> +      properties:
> +        resets:
> +          maxItems: 1
> +
> +        power-domains:
> +          maxItems: 1
> +
> +      required:
> +        - resets
> +        - power-domains
>  
>  unevaluatedProperties: false
>  
> -- 
> 2.43.0
>