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

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Date:   Tue, 2 May 2023 10:47:36 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Krishna Kurapati PSSNV <quic_kriskura@...cinc.com>,
        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 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