linux-kernel - Re: [PATCH v3 2/2] arm64: dts: qcom: sm8450: Flatten usb controller node

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Message-ID: <c67dc09a-12e1-4764-b0f2-6c18bc341b7b@oss.qualcomm.com>
Date: Mon, 14 Jul 2025 11:51:12 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Krishna Kurapati <krishna.kurapati@....qualcomm.com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Rob Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, neil.armstrong@...aro.org
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v3 2/2] arm64: dts: qcom: sm8450: Flatten usb controller
 node

On 7/14/25 6:53 AM, Krishna Kurapati wrote:
> Flatten usb controller node and update to using latest bindings
> and flattened driver approach.
> 
> Signed-off-by: Krishna Kurapati <krishna.kurapati@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/sm8450-hdk.dts       |  5 --
>  .../dts/qcom/sm8450-sony-xperia-nagara.dtsi   |  5 +-
>  arch/arm64/boot/dts/qcom/sm8450.dtsi          | 57 +++++++++----------
>  3 files changed, 27 insertions(+), 40 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8450-hdk.dts b/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
> index 2ff40a120aad..0c6aa7ddf432 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
> +++ b/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
> @@ -1199,11 +1199,6 @@ &usb_1 {
>  	status = "okay";
>  };
>  
> -&usb_1_dwc3 {
> -	dr_mode = "otg";
> -	usb-role-switch;
> -};
> -
>  &usb_1_dwc3_hs {
>  	remote-endpoint = <&pmic_glink_hs_in>;
>  };
> diff --git a/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi b/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi
> index cc1335a07a35..6bd315e10992 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi
> @@ -781,11 +781,8 @@ &uart7 {
>  };
>  
>  &usb_1 {
> -	status = "okay";
> -};
> -
> -&usb_1_dwc3 {
>  	dr_mode = "peripheral";
> +	status = "okay";
>  };
>  
>  &usb_1_hsphy {
> diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> index 54c6d0fdb2af..77104def5ced 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> @@ -5417,12 +5417,9 @@ opp-202000000 {
>  		};
>  
>  		usb_1: usb@...8800 {
> -			compatible = "qcom,sm8450-dwc3", "qcom,dwc3";
> -			reg = <0 0x0a6f8800 0 0x400>;
> +			compatible = "qcom,sm8450-dwc3", "qcom,snps-dwc3";
> +			reg = <0 0x0a600000 0 0x10000>;

I think we want size = 0xfc100 to include qscratch and DBM (but
specificallynot BAM)

with that:

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad