linux-kernel - Re: [PATCH 04/10] dt-bindings: PCI: qcom: Add SC8280XP to binding

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Date:   Sat, 9 Jul 2022 13:30:53 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Stanimir Varbanov <svarbanov@...sol.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/10] dt-bindings: PCI: qcom: Add SC8280XP to binding

On Wed, Jun 29, 2022 at 04:09:54PM +0200, Johan Hovold wrote:
> Add the SC8280XP platform to the binding.
> 
> SC8280XP use four host interrupts for MSI routing so remove the obsolete
> comment referring to newer chipsets supporting one or eight interrupts
> (e.g. for backwards compatibility).
> 
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Wondering why 4 on this SoC. Is this what added in downstream or you also
verified it with IP documentation.

Thanks,
Mani

> ---
>  .../devicetree/bindings/pci/qcom,pcie.yaml    | 50 ++++++++++++++++++-
>  1 file changed, 49 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
> index 8560c65e6f0b..a039f6110322 100644
> --- a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
> +++ b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
> @@ -27,6 +27,7 @@ properties:
>        - qcom,pcie-qcs404
>        - qcom,pcie-sc7280
>        - qcom,pcie-sc8180x
> +      - qcom,pcie-sc8280xp
>        - qcom,pcie-sdm845
>        - qcom,pcie-sm8150
>        - qcom,pcie-sm8250
> @@ -181,6 +182,7 @@ allOf:
>              enum:
>                - qcom,pcie-sc7280
>                - qcom,pcie-sc8180x
> +              - qcom,pcie-sc8280xp
>                - qcom,pcie-sm8250
>                - qcom,pcie-sm8450-pcie0
>                - qcom,pcie-sm8450-pcie1
> @@ -596,6 +598,35 @@ allOf:
>            items:
>              - const: pci # PCIe core reset
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - qcom,pcie-sc8280xp
> +    then:
> +      properties:
> +        clocks:
> +          minItems: 8
> +          maxItems: 9
> +        clock-names:
> +          minItems: 8
> +          items:
> +            - 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: ddrss_sf_tbu # PCIe SF TBU clock
> +            - const: noc_aggr_4 # NoC aggregate 4 clock
> +            - const: noc_aggr_south_sf # NoC aggregate South SF clock
> +            - const: cnoc_qx # Configuration NoC QX clock
> +        resets:
> +          maxItems: 1
> +        reset-names:
> +          items:
> +            - const: pci # PCIe core reset
> +
>    - if:
>        not:
>          properties:
> @@ -624,7 +655,6 @@ allOf:
>          - resets
>          - reset-names
>  
> -    # On newer chipsets support either 1 or 8 msi interrupts
>    - if:
>        properties:
>          compatible:
> @@ -660,6 +690,24 @@ allOf:
>                  - const: msi6
>                  - const: msi7
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - qcom,pcie-sc8280xp
> +    then:
> +      properties:
> +        interrupts:
> +          minItems: 4
> +          maxItems: 4
> +        interrupt-names:
> +          items:
> +            - const: msi0
> +            - const: msi1
> +            - const: msi2
> +            - const: msi3
> +
>    - if:
>        properties:
>          compatible:
> -- 
> 2.35.1
> 

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