linux-kernel - Re: [PATCH v7 1/9] dt-bindings: usb: qcom,dwc3: Add bindings for SC8280 Multiport

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Message-ID: <aab0ee5c-4573-759a-ebda-401b041a65cb@quicinc.com>
Date:   Tue, 2 May 2023 14:22:08 +0530
From:   Krishna Kurapati PSSNV <quic_kriskura@...cinc.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Andy Gross <agross@...nel.org>,
        "Bjorn Andersson" <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Felipe Balbi <balbi@...nel.org>,
        "Wesley Cheng" <quic_wcheng@...cinc.com>
CC:     <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <quic_pkondeti@...cinc.com>, <quic_ppratap@...cinc.com>,
        <quic_jackp@...cinc.com>, <quic_harshq@...cinc.com>,
        <ahalaney@...hat.com>, <quic_shazhuss@...cinc.com>
Subject: Re: [PATCH v7 1/9] dt-bindings: usb: qcom,dwc3: Add bindings for
 SC8280 Multiport



On 5/2/2023 2:17 PM, Krzysztof Kozlowski wrote:
> On 02/05/2023 10:35, Krishna Kurapati PSSNV wrote:
>>
>>
>> On 5/2/2023 1:18 PM, Krzysztof Kozlowski wrote:
>>> On 01/05/2023 16:34, Krishna Kurapati wrote:
>>>> Add the compatible string for SC8280 Multiport USB controller from
>>>> Qualcomm.
>>>>
>>>> There are 4 power event irq interrupts supported by this controller
>>>> (one for each port of multiport). Added all the 4 as non-optional
>>>> interrupts for SC8280XP-MP
>>>>
>>>> Signed-off-by: Krishna Kurapati <quic_kriskura@...cinc.com>
>>>> ---
>>>>    .../devicetree/bindings/usb/qcom,dwc3.yaml    | 21 +++++++++++++++++++
>>>>    1 file changed, 21 insertions(+)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml b/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml
>>>> index d84281926f10..2c96da1ce5b8 100644
>>>> --- a/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml
>>>> +++ b/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml
>>>> @@ -26,6 +26,7 @@ properties:
>>>>              - qcom,sc7180-dwc3
>>>>              - qcom,sc7280-dwc3
>>>>              - qcom,sc8280xp-dwc3
>>>> +          - qcom,sc8280xp-dwc3-mp
>>>
>>> SC8280xp comes with two USB controllers: one single-port and one multi-port?
>>
>> Hi Krzysztof,
>>
>>     SC8280XP comes with 3 controllers. The first two are single port
>> controller and the third one is a multiport controller. In DTSI:
>> usb_0 / usb1: have compatible set to : "qcom,sc8280xp-dwc3"
>>
>> And multiport controller has it set to "qcom,sc8280xp-dwc3-mp"
> 
> OK, then this looks fine.
> 
> Please add the compatible to existing allOf:if:then to constrain clocks
> and other pieces. If none of existing if:then: matches your case, add
> new one.
> 
> Best regards,
> Krzysztof
> 

Thanks Krzysztof. One query:

Clocks are same for both single/multiport controllers. Would the 
following be fine ?

diff --git a/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml 
b/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml
index 2c96da1ce5b8..c0f4745febf0 100644
--- a/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml
@@ -263,6 +263,7 @@ allOf:
            contains:
              enum:
                - qcom,sc8280xp-dwc3
+             - qcom,sc8280xp-dwc3-mp
      then:
        properties:
          clocks:

Regards,
Krishna,