linux-kernel - Re: [PATCH v3 1/1] dt-bindings: watchdog: starfive,jh7100-wdt: Add compatible for JH8100

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Date:   Thu, 14 Dec 2023 08:39:46 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Ji Sheng Teoh <jisheng.teoh@...rfivetech.com>,
        Xingyu Wu <xingyu.wu@...rfivetech.com>,
        Samin Guo <samin.guo@...rfivetech.com>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     Ley Foon Tan <leyfoon.tan@...rfivetech.com>,
        linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/1] dt-bindings: watchdog: starfive,jh7100-wdt: Add
 compatible for JH8100

On 14/12/2023 04:30, Ji Sheng Teoh wrote:
> Add "starfive,jh8100-wdt" compatible string for StarFive's JH8100
> watchdog.
> Since JH8100 watchdog only has 1 reset signal, update binding
> document to support one reset for "starfive,jh8100-wdt" compatible.
> 
> Signed-off-by: Ley Foon Tan <leyfoon.tan@...rfivetech.com>
> Signed-off-by: Ji Sheng Teoh <jisheng.teoh@...rfivetech.com>
> ---
>  .../watchdog/starfive,jh7100-wdt.yaml         | 48 ++++++++++++++++---
>  1 file changed, 42 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/starfive,jh7100-wdt.yaml b/Documentation/devicetree/bindings/watchdog/starfive,jh7100-wdt.yaml
> index 68f3f6fd08a6..79082c5f9971 100644
> --- a/Documentation/devicetree/bindings/watchdog/starfive,jh7100-wdt.yaml
> +++ b/Documentation/devicetree/bindings/watchdog/starfive,jh7100-wdt.yaml
> @@ -19,14 +19,17 @@ description:
>    isn't cleared, the watchdog will reset the system unless the watchdog
>    reset is disabled.
>  
> -allOf:
> -  - $ref: watchdog.yaml#
> -
>  properties:
>    compatible:
> -    enum:
> -      - starfive,jh7100-wdt
> -      - starfive,jh7110-wdt
> +    oneOf:
> +      - items:

Drop items, it wasn't here in the first place.

> +          - enum:
> +              - starfive,jh7100-wdt
> +              - starfive,jh7110-wdt
> +      - items:
> +          - enum:
> +              - starfive,jh8100-wdt
> +          - const: starfive,jh7110-wdt
>  
>    reg:
>      maxItems: 1
> @@ -45,10 +48,33 @@ properties:
>        - const: core
>  
>    resets:
> +    minItems: 1
>      items:
>        - description: APB reset
>        - description: Core reset

This is not valid for jh8100. Move it to else: part. Here maxItems: 2.

>  
> +allOf:

allOf goes after required:, see example-schema

> +  - $ref: watchdog.yaml#
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - starfive,jh8100-wdt
> +    then:
> +      properties:
> +        resets:
> +          description: |
> +            Must contain Core reset entry.
> +          maxItems: 1

Instead of both, items: with description.

> +    else:
> +      properties:
> +        resets:
> +          description: |
> +            Must contain APB reset and Core reset entry.
> +          minItems: 2
> +
>  required:
>    - compatible
>    - reg
> @@ -69,3 +95,13 @@ examples:
>          resets = <&rst 99>,
>                   <&rst 100>;
>      };
> +
> +  - |
> +    watchdog@...70000 {
> +        compatible = "starfive,jh8100-wdt", "starfive,jh7110-wdt";
> +        reg = <0x12270000 0x10000>;
> +        clocks = <&clk 78>,
> +                 <&clk 79>;

No need for new example with difference in one property.

Best regards,
Krzysztof