linux-kernel - Re: [PATCH v2 02/12] dt-bindings: PCI: qcom: Document sc8180x properties

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Date:   Mon, 27 Mar 2023 09:52:40 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Vinod Koul <vkoul@...nel.org>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Bjorn Andersson <andersson@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 02/12] dt-bindings: PCI: qcom: Document sc8180x
 properties

On 25/03/2023 13:24, Vinod Koul wrote:
> sc8180x PCIe clocks and resets are different from the common pcie

There is no "common" part for sc8180x in this binding. sc8180x is
customized.

> binding, this warrants the oneOf clause for the clocks and resets

Your subject and commit suggests you are now adding new customization
for SC8180x, but it is already there! Clocks, interrupts, regs etc.
Therefore the commit msg does not fit the contents of the patch. Instead
say that you fix something or change, because of foo and bar.

Otherwise it looks like some old patch rebased onto new kernel so it
does not match at all.

> 
> Signed-off-by: Vinod Koul <vkoul@...nel.org>
> ---
>  .../devicetree/bindings/pci/qcom,pcie.yaml    | 49 ++++++++++++++++++-
>  1 file changed, 47 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
> index fb32c43dd12d..d4f837924e7c 100644
> --- a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
> +++ b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
> @@ -459,6 +459,33 @@ allOf:
>            items:
>              - const: pci # PCIe core reset
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - qcom,pcie-sc8180x
> +    then:
> +      properties:
> +        clocks:
> +          minItems: 8
> +          maxItems: 8
> +        clock-names:
> +          items:
> +            - const: pipe # PIPE clock
> +            - const: aux # Auxiliary clock
> +            - const: cfg # Configuration clock
> +            - const: bus_master # Master AXI clock
> +            - const: bus_slave # Slave AXI clock
> +            - const: slave_q2a # Slave Q2A clock
> +            - const: ref # REFERENCE clock
> +            - const: tbu # PCIe TBU clock
> +        resets:
> +          maxItems: 1
> +        reset-names:
> +          items:
> +            - const: pci # PCIe core reset
> +
>    - if:
>        properties:
>          compatible:
> @@ -507,7 +534,6 @@ allOf:
>          compatible:
>            contains:
>              enum:
> -              - qcom,pcie-sc8180x
>                - qcom,pcie-sm8150
>                - qcom,pcie-sm8250
>      then:
> @@ -675,6 +701,7 @@ allOf:
>            contains:
>              enum:
>                - qcom,pcie-sa8540p
> +              - qcom,pcie-sc8180x
>                - qcom,pcie-sc8280xp
>      then:
>        required:
> @@ -717,7 +744,6 @@ allOf:
>              enum:
>                - qcom,pcie-msm8996
>                - qcom,pcie-sc7280
> -              - qcom,pcie-sc8180x
>                - qcom,pcie-sdm845
>                - qcom,pcie-sm8150
>                - qcom,pcie-sm8250
> @@ -746,6 +772,25 @@ allOf:
>                  - const: msi6
>                  - const: msi7
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - qcom,pcie-sc8180x
> +    then:
> +      oneOf:

It's not oneOf.
> +        - properties:
> +            interrupts:
> +              maxItems: 1
> +            interrupt-names:
> +              items:
> +                - const: msi

Why do you even need this here? It's already there.

> +            iommus:
> +              maxItems: 1
> +            iommu-map:
> +              maxItems: 2

And this looks wrong. Drop.
https://lore.kernel.org/all/20230308082424.140224-3-manivannan.sadhasivam@linaro.org/

> +
>    - if:
>        properties:
>          compatible:

Best regards,
Krzysztof