linux-kernel - Re: [PATCH v5 2/3] dt-bindings: cros-ec: Reorganize property availability

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Date:   Thu, 12 May 2022 16:44:44 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, patches@...ts.linux.dev,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        chrome-platform@...ts.linux.dev,
        Guenter Roeck <groeck@...omium.org>,
        Craig Hesling <hesling@...omium.org>,
        Tom Hughes <tomhughes@...omium.org>,
        Alexandru M Stan <amstan@...omium.org>,
        Tzung-Bi Shih <tzungbi@...nel.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCH v5 2/3] dt-bindings: cros-ec: Reorganize property availability

Hi,

On Wed, May 11, 2022 at 6:39 PM Stephen Boyd <swboyd@...omium.org> wrote:
>
> Various properties in the cros-ec binding only apply to different
> compatible strings. For example, the interrupts and reg property are
> required for all cros-ec devices except for the rpmsg version. Add some
> conditions to update the availability of properties so that they can't
> be used with compatibles that don't support them.
>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
> Cc: <devicetree@...r.kernel.org>
> Cc: <chrome-platform@...ts.linux.dev>
> Cc: Guenter Roeck <groeck@...omium.org>
> Cc: Douglas Anderson <dianders@...omium.org>
> Cc: Craig Hesling <hesling@...omium.org>
> Cc: Tom Hughes <tomhughes@...omium.org>
> Cc: Alexandru M Stan <amstan@...omium.org>
> Cc: Tzung-Bi Shih <tzungbi@...nel.org>
> Cc: Matthias Kaehlcke <mka@...omium.org>
> Cc: Benson Leung <bleung@...omium.org>
> Cc: Lee Jones <lee.jones@...aro.org>
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>
> ---
>  .../bindings/mfd/google,cros-ec.yaml          | 39 +++++++++++++------
>  1 file changed, 27 insertions(+), 12 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml b/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml
> index 99eda9ab0651..409ecef967ce 100644
> --- a/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml
> +++ b/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml
> @@ -148,18 +148,33 @@ patternProperties:
>  required:
>    - compatible
>
> -if:
> -  properties:
> -    compatible:
> -      contains:
> -        enum:
> -          - google,cros-ec-i2c
> -          - google,cros-ec-rpmsg
> -then:
> -  properties:
> -    google,cros-ec-spi-pre-delay: false
> -    google,cros-ec-spi-msg-delay: false
> -    spi-max-frequency: false
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          not:
> +            contains:
> +              const: google,cros-ec-spi
> +    then:
> +      properties:
> +        controller-data: false
> +        google,cros-ec-spi-pre-delay: false
> +        google,cros-ec-spi-msg-delay: false
> +        spi-max-frequency: false
> +
> +  - if:
> +      properties:
> +        compatible:
> +          not:
> +            contains:
> +              const: google,cros-ec-rpmsg
> +    then:
> +      properties:
> +        mediatek,rpmsg-name: false
> +
> +      required:
> +        - reg
> +        - interrupts

Is it worth having an "else" clause here? to explicitly make
"mediatek,rpmsg-name" required for mediatek?

In any case, this seems right from my (albeit) limited yaml knowledge
and seems like an improvement.

Reviewed-by: Douglas Anderson <dianders@...omium.org>