linux-kernel - Re: [PATCH v2] dt-bindings: watchdog: improve QCOM compatible parsing for modern chips

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Message-ID: <9bcdec7e-2b09-56ac-f798-1c3971a87f46@linaro.org>
Date:   Sat, 7 May 2022 19:22:23 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     David Heidelberg <david@...t.cz>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Rob Herring <robh+dt@...nel.org>,
        Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Cc:     ~okias/devicetree@...ts.sr.ht, Rob Herring <robh@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-watchdog@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] dt-bindings: watchdog: improve QCOM compatible parsing
 for modern chips

On 11/01/2022 22:23, David Heidelberg wrote:
> Parse compatible as expected for modern QCOMs.
> 
> Fixes warnings as:
> arch/arm64/boot/dts/qcom/sdm845-oneplus-fajita.dt.yaml: watchdog@...80000: compatible: ['qcom,apss-wdt-sdm845', 'qcom,kpss-wdt'] is too long
>         From schema: Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml
> arch/arm64/boot/dts/qcom/sdm845-oneplus-fajita.dt.yaml: watchdog@...80000: compatible: Additional items are not allowed ('qcom,kpss-wdt' was unexpected)
>         From schema: Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml
> 
> Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Reviewed-by: Rob Herring <robh@...nel.org>
> Signed-off-by: David Heidelberg <david@...t.cz>
> ---
> v2:
>  - updated compatible list as two compatibles has been added upstream
>  -> resolve merge conflict
> ---
>  .../bindings/watchdog/qcom-wdt.yaml           | 37 +++++++++++--------
>  1 file changed, 21 insertions(+), 16 deletions(-)

It seems this patch received three reviews but was not picked up. David,
do you plan to work on this?

> 
> diff --git a/Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml b/Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml
> index 16c6f82a13ca..4ff8c59c59ab 100644
> --- a/Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml
> +++ b/Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml
> @@ -14,22 +14,27 @@ allOf:
>  
>  properties:
>    compatible:
> -    enum:
> -      - qcom,apss-wdt-qcs404
> -      - qcom,apss-wdt-sc7180
> -      - qcom,apss-wdt-sc7280
> -      - qcom,apss-wdt-sdm845
> -      - qcom,apss-wdt-sdx55
> -      - qcom,apss-wdt-sm6350
> -      - qcom,apss-wdt-sm8150
> -      - qcom,apss-wdt-sm8250
> -      - qcom,kpss-timer
> -      - qcom,kpss-wdt
> -      - qcom,kpss-wdt-apq8064
> -      - qcom,kpss-wdt-ipq4019
> -      - qcom,kpss-wdt-ipq8064
> -      - qcom,kpss-wdt-msm8960
> -      - qcom,scss-timer
> +    oneOf:
> +      - items:
> +          - enum:
> +              - qcom,apss-wdt-qcs404
> +              - qcom,apss-wdt-sc7180
> +              - qcom,apss-wdt-sc7280
> +              - qcom,apss-wdt-sdm845
> +              - qcom,apss-wdt-sdx55
> +              - qcom,apss-wdt-sm6350
> +              - qcom,apss-wdt-sm8150
> +              - qcom,apss-wdt-sm8250
> +          - const: qcom,kpss-wdt
> +      - items:
> +          - enum:
> +              - qcom,kpss-wdt
> +              - qcom,kpss-timer
> +              - qcom,kpss-wdt-apq8064
> +              - qcom,kpss-wdt-ipq4019
> +              - qcom,kpss-wdt-ipq8064
> +              - qcom,kpss-wdt-msm8960

These do not look correct without appropriate fallback.

> +              - qcom,scss-timer
>  
>    reg:
>      maxItems: 1


Best regards,
Krzysztof