linux-kernel - Re: [PATCH 1/7] dt-bindings: PCI: qcom: Add IPQ9574 specific compatible

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Date:   Mon, 20 Feb 2023 18:59:31 +0530
From:   Devi Priya <quic_devipriy@...cinc.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <lpieralisi@...nel.org>,
        <kw@...ux.com>, <robh@...nel.org>, <bhelgaas@...gle.com>,
        <krzysztof.kozlowski+dt@...aro.org>, <vkoul@...nel.org>,
        <kishon@...nel.org>, <mturquette@...libre.com>, <sboyd@...nel.org>,
        <mani@...nel.org>, <p.zabel@...gutronix.de>,
        <svarbanov@...sol.com>, <linux-arm-msm@...r.kernel.org>,
        <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-phy@...ts.infradead.org>,
        <linux-clk@...r.kernel.org>
CC:     <quic_srichara@...cinc.com>, <quic_gokulsri@...cinc.com>,
        <quic_sjaganat@...cinc.com>, <quic_kathirav@...cinc.com>,
        <quic_arajkuma@...cinc.com>, <quic_anusha@...cinc.com>
Subject: Re: [PATCH 1/7] dt-bindings: PCI: qcom: Add IPQ9574 specific
 compatible

Hi Krzysztof,
Thanks for taking time to review the patch!

On 2/16/2023 3:59 PM, Krzysztof Kozlowski wrote:
> On 14/02/2023 17:41, Devi Priya wrote:
>> Document the compatible for IPQ9574
>>
>> Signed-off-by: Devi Priya <quic_devipriy@...cinc.com>
>> ---
>>   .../devicetree/bindings/pci/qcom,pcie.yaml    | 72 ++++++++++++++++++-
>>   1 file changed, 70 insertions(+), 2 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
>> index 872817d6d2bd..dabdf2684e2d 100644
>> --- a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
>> +++ b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
>> @@ -26,6 +26,7 @@ properties:
>>             - qcom,pcie-ipq8064-v2
>>             - qcom,pcie-ipq8074
>>             - qcom,pcie-ipq8074-gen3
>> +          - qcom,pcie-ipq9574
>>             - qcom,pcie-msm8996
>>             - qcom,pcie-qcs404
>>             - qcom,pcie-sa8540p
>> @@ -44,11 +45,11 @@ properties:
>>   
>>     reg:
>>       minItems: 4
>> -    maxItems: 5
>> +    maxItems: 6
>>   
>>     reg-names:
>>       minItems: 4
>> -    maxItems: 5
>> +    maxItems: 6
>>   
>>     interrupts:
>>       minItems: 1
>> @@ -105,6 +106,8 @@ properties:
>>       items:
>>         - const: pciephy
>>   
>> +  msi-parent: true
>> +
>>     power-domains:
>>       maxItems: 1
>>   
>> @@ -173,6 +176,27 @@ allOf:
>>               - const: parf # Qualcomm specific registers
>>               - const: config # PCIe configuration space
>>   
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            enum:
>> +              - qcom,pcie-ipq9574
>> +    then:
>> +      properties:
>> +        reg:
>> +          minItems: 5
>> +          maxItems: 6
>> +        reg-names:
>> +          minItems: 5
>> +          items:
>> +            - const: dbi # DesignWare PCIe registers
>> +            - const: elbi # External local bus interface registers
>> +            - const: atu # ATU address space
>> +            - const: parf # Qualcomm specific registers
>> +            - const: config # PCIe configuration space
>> +            - const: aggr_noc #PCIe aggr_noc
> 
> Why last one is optional? I would assume device either has it or has not.
> 
Yes right, the device has aggr_noc.
The rate adapter update was required only for 1-lane PCIe
But will check and update this accordingly in the next spin.

> 
> Best regards,
> Krzysztof
> 
Best Regards,
Devi Priya