linux-kernel - Re: [PATCH v1 1/5] dt-bindings: PCI: qcom-ep: Add support for SA8775P SoC

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Message-ID: <20230921081132.GA2891@thinkpad>
Date:   Thu, 21 Sep 2023 10:11:32 +0200
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Mrinmay Sarkar <quic_msarkar@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        konrad.dybcio@...aro.org, mani@...nel.org,
        quic_shazhuss@...cinc.com, quic_nitegupt@...cinc.com,
        quic_ramkri@...cinc.com, quic_nayiluri@...cinc.com,
        quic_krichai@...cinc.com, quic_vbadigan@...cinc.com,
        quic_parass@...cinc.com, Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Rob Herring <robh@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Vinod Koul <vkoul@...nel.org>, linux-pci@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, mhi@...ts.linux.dev,
        linux-phy@...ts.infradead.org
Subject: Re: [PATCH v1 1/5] dt-bindings: PCI: qcom-ep: Add support for
 SA8775P SoC

On Wed, Sep 20, 2023 at 07:25:08PM +0530, Mrinmay Sarkar wrote:
> Add devicetree bindings support for SA8775P SoC.
> Define reg and interrupt per platform.
> 
> Signed-off-by: Mrinmay Sarkar <quic_msarkar@...cinc.com>
> ---
>  .../devicetree/bindings/pci/qcom,pcie-ep.yaml      | 130 +++++++++++++++++----
>  1 file changed, 108 insertions(+), 22 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
> index a223ce0..e860e8f 100644
> --- a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
> +++ b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
> @@ -13,6 +13,7 @@ properties:
>    compatible:
>      oneOf:
>        - enum:
> +          - qcom,sa8775p-pcie-ep
>            - qcom,sdx55-pcie-ep
>            - qcom,sm8450-pcie-ep
>        - items:
> @@ -20,29 +21,19 @@ properties:
>            - const: qcom,sdx55-pcie-ep
>  
>    reg:
> -    items:
> -      - description: Qualcomm-specific PARF configuration registers
> -      - description: DesignWare PCIe registers
> -      - description: External local bus interface registers
> -      - description: Address Translation Unit (ATU) registers
> -      - description: Memory region used to map remote RC address space
> -      - description: BAR memory region
> +    minItems: 6
> +    maxItems: 7
>  
>    reg-names:
> -    items:
> -      - const: parf
> -      - const: dbi
> -      - const: elbi
> -      - const: atu
> -      - const: addr_space
> -      - const: mmio
> +    minItems: 6
> +    maxItems: 7
>  
>    clocks:
> -    minItems: 7
> +    minItems: 5
>      maxItems: 8
>  
>    clock-names:
> -    minItems: 7
> +    minItems: 5
>      maxItems: 8
>  
>    qcom,perst-regs:
> @@ -57,14 +48,12 @@ properties:
>            - description: Perst separation enable offset
>  
>    interrupts:
> -    items:
> -      - description: PCIe Global interrupt
> -      - description: PCIe Doorbell interrupt
> +    minItems: 2
> +    maxItems: 3
>  
>    interrupt-names:
> -    items:
> -      - const: global
> -      - const: doorbell
> +    minItems: 2
> +    maxItems: 3
>  
>    reset-gpios:
>      description: GPIO used as PERST# input signal
> @@ -122,6 +111,51 @@ allOf:
>          compatible:
>            contains:
>              enum:
> +              - qcom,sa8775p-pcie-ep
> +    then:
> +      properties:
> +        reg:
> +          items:
> +            - description: Qualcomm-specific PARF configuration registers
> +            - description: DesignWare PCIe registers
> +            - description: External local bus interface registers
> +            - description: Address Translation Unit (ATU) registers
> +            - description: Memory region used to map remote RC address space
> +            - description: BAR memory region
> +            - description: DMA memory region

It should be described as "DMA register space" or something, because this could
be misinterpreted as memory region for doing DMA.

- Mani

-- 
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