linux-kernel - Re: [PATCH v3 2/2] arm64: dts: qcom: sm8150: Add USB and PHY device nodes

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Message-ID: <b54f9190-78c9-5b6a-932c-ad2b7b4444f3@codeaurora.org>
Date:   Fri, 10 Apr 2020 17:50:08 -0700
From:   Wesley Cheng <wcheng@...eaurora.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     agross@...nel.org, mturquette@...libre.com, sboyd@...nel.org,
        robh+dt@...nel.org, mark.rutland@....com,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        vinod.koul@...aro.org, Jack Pham <jackp@...eaurora.org>
Subject: Re: [PATCH v3 2/2] arm64: dts: qcom: sm8150: Add USB and PHY device
 nodes


On 4/7/2020 4:38 PM, Bjorn Andersson wrote:
> On Tue 07 Apr 15:24 PDT 2020, Wesley Cheng wrote:
> 
>> From: Jack Pham <jackp@...eaurora.org>
>>
>> Add device nodes for the USB3 controller, QMP SS PHY and
>> SNPS HS PHY.
>>
> 
> Thanks for the respin Wesley, and thanks for testing Vinod. Just spotted
> one little details below.
> 
>> Signed-off-by: Jack Pham <jackp@...eaurora.org>
>> Signed-off-by: Wesley Cheng <wcheng@...eaurora.org>
>> Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
>> Tested-by: Vinod Koul <vinod.koul@...aro.org>
>> ---
> 
> Please make a habit of documenting what changed since the previous
> version here, below the ---.
> 
>>  arch/arm64/boot/dts/qcom/sm8150-mtp.dts | 21 ++++++++
>>  arch/arm64/boot/dts/qcom/sm8150.dtsi    | 92 +++++++++++++++++++++++++++++++++
>>  2 files changed, 113 insertions(+)
> [..]
>> diff --git a/arch/arm64/boot/dts/qcom/sm8150.dtsi b/arch/arm64/boot/dts/qcom/sm8150.dtsi
> [..]
>> +		usb_1_hsphy: phy@...2000 {
>> +			compatible = "qcom,usb-snps-hs-7nm-phy",
>> +							"qcom,sm8150-usb-hs-phy";
> [..]
>> +		usb_1: usb@...8800 {
>> +			compatible = "qcom,sdm845-dwc3", "qcom,dwc3";
> 
> The first cell here should be qcom,sm8150-dwc3. The Linux driver will
> "fall through" and match on the less specific "qcom,dwc3", but if we in
> the future realize that we have sm8150 specific behavior/quirks we can
> make the driver match on the more specific one to implement this.
> 
> And similarly the order of the compatibles in &usb_1_hsphy should be
> reversed as well.
> 
> Regards,
> Bjorn
> 

Hi Bjorn,

Thanks for the input.  Will do that and re-submit v4.

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