linux-kernel - Re: [PATCH v3 4/4] arm64: dts: qcom: lemans-evk: Enable secondary USB controller in host mode

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Message-ID: <95f8a16b-5f29-46d3-bb3e-f12b5d3e4fe2@oss.qualcomm.com>
Date: Mon, 22 Dec 2025 11:19:14 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Swati Agarwal <swati.agarwal@....qualcomm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, Icenowy Zheng <uwu@...nowy.me>,
        Matthias Kaehlcke <mka@...omium.org>,
        J . Neuschäfer
 <j.ne@...teo.net>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Jens Glathe <jens.glathe@...schoolsolutions.biz>,
        Mike Looijmans <mike.looijmans@...ic.nl>,
        Catalin Popescu <catalin.popescu@...ca-geosystems.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Pin-yen Lin <treapking@...omium.org>
Cc: linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v3 4/4] arm64: dts: qcom: lemans-evk: Enable secondary USB
 controller in host mode

On 12/20/25 7:35 AM, Swati Agarwal wrote:
> Enable secondary USB controller in host mode on lemans EVK Platform.
> 
> For secondary USB Typec port, there is a genesys USB HUB GL3590 having 4
> ports sitting in between SOC and HD3SS3220 Type-C port controller and SS
> lines run from the SoC through the hub to the Port controller. Mark the
> second USB controller as host only capable.
> 
> Add HD3SS3220 Type-C port controller along with Type-c connector for
> controlling vbus supply.
> 
> Signed-off-by: Swati Agarwal <swati.agarwal@....qualcomm.com>
> ---

[...]

> +	connector-1 {
> +		compatible = "usb-c-connector";
> +		label = "USB1-Type-C";
> +		data-role = "host";
> +		power-role = "dual";
> +		try-power-role = "source";

Is this port actually capable of receiving power (i.e. won't that
fry the hub)?

[...]

> +			port@2 {
> +				reg = <2>;
> +
> +				usb1_ss_in: endpoint {
> +					remote-endpoint = <&usb_hub_3_1>;
> +				};
> +
> +			};

Stray \n above

[...]

> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port@0 {
> +				reg = <0>;
> +
> +				hd3ss3220_1_in_ep: endpoint {
> +					remote-endpoint = <&usb1_con_ss_ep>;
> +				};
> +			};
> +
> +		};

Stray \n above

[...]

> +				usb_hub_3_1: endpoint {
> +					remote-endpoint = <&usb1_ss_in>;
> +				};
> +			};
> +
> +		};

Stray \n above

Konrad