linux-kernel - Re: [PATCH 3/7] dt-bindings: PCI: qcom: Add IPQ9574 PCIe controller

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Date: Wed, 3 Apr 2024 13:05:22 -0500
From: mr.nuke.me@...il.com
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>, Bjorn Helgaas
 <bhelgaas@...gle.com>, Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Krzysztof Wilczyński <kw@...ux.com>,
 Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: ansuelsmth@...il.com, robimarko@...il.com, linux-arm-msm@...r.kernel.org,
 linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/7] dt-bindings: PCI: qcom: Add IPQ9574 PCIe controller



On 4/3/24 02:14, Krzysztof Kozlowski wrote:
> On 02/04/2024 21:25, Alexandru Gagniuc wrote:
>> IPQ9574 has PCIe controllers which are almost identical to IPQ6018.
>> The only difference is that the "iface" clock is not required.
>> Document this difference along with the compatible string.
>>
>> Signed-off-by: Alexandru Gagniuc <mr.nuke.me@...il.com>
>> ---
>>   .../devicetree/bindings/pci/qcom,pcie.yaml    | 32 +++++++++++++++++++
>>   1 file changed, 32 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
>> index cf9a6910b542..6eb29547c18e 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-sdm845
>> @@ -383,6 +384,35 @@ allOf:
>>               - const: axi_s # AXI Slave clock
>>               - const: axi_bridge # AXI bridge clock
>>               - const: rchng
>> +
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            enum:
>> +              - qcom,pcie-ipq9574
>> +    then:
>> +      properties:
>> +        clocks:
>> +          minItems: 4
>> +          maxItems: 4
>> +        clock-names:
>> +          items:
>> +            - const: axi_m # AXI Master clock
>> +            - const: axi_s # AXI Slave clock
>> +            - const: axi_bridge # AXI bridge clock
>> +            - const: rchng
>> +
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            enum:
>> +              - qcom,pcie-ipq6018
>> +              - qcom,pcie-ipq8074-gen3
>> +              - qcom,pcie-ipq9574
>> +    then:
> 
> Do not introduce inconsistent style. All if:then: define both clocks and
> resets, right? And after your patch not anymore?
> 
I kept the resets in one place because they are the same cross the ipq* 
variants.

Do I understand correctly that you wish me to split up the resets as well?

     if ipq8074 ipq6018
         clocks
         resets

     if ipq9754
         clocks
         resets

Alex

> Best regards,
> Krzysztof
>