Re: [PATCH v4 3/3] riscv: dts: spacemit: Enable USB3.0/PCIe on OrangePi RV2

From: Yixun Lan <dlan@kernel.org>
To: Han Gao <gaohan@iscas.ac.cn>
Cc: Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Alexandre Ghiti <alex@ghiti.fr>, Chukun Pan <amadeus@jmu.edu.cn>,
	devicetree@vger.kernel.org, linux-riscv@lists.infradead.org,
	spacemit@lists.linux.dev, linux-kernel@vger.kernel.org,
	Han Gao <rabenda.cn@gmail.com>
Subject: Re: [PATCH v4 3/3] riscv: dts: spacemit: Enable USB3.0/PCIe on OrangePi RV2
Date: Wed, 1 Apr 2026 12:04:19 +0800	[thread overview]
Message-ID: <20260401040419-GKC976850@kernel.org> (raw)
In-Reply-To: <0ec229e2fb138092672773f134d0739e70740ce0.1774974017.git.gaohan@iscas.ac.cn>

Hi Han,

On 00:27 Wed 01 Apr     , Han Gao wrote:
> Enable the DWC3 USB 3.0 controller and its associated usbphy2 on the
> OrangePi RV2 board.
> 
> The board utilizes a Genesys Logic GL3523 USB3.0 hub.
> 
> Define a 3.3v fixed voltage regulator for PCIe and enable PCIe and
> PHY-related Device Tree nodes for the OrangePi RV2.
> 
> Signed-off-by: Han Gao <gaohan@iscas.ac.cn>
> ---
>  .../boot/dts/spacemit/k1-orangepi-rv2.dts     | 68 +++++++++++++++++++
>  1 file changed, 68 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
> index e5e358d49c09..e93e7f660820 100644
> --- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
> @@ -23,6 +23,15 @@ chosen {
>  		stdout-path = "serial0";
>  	};
>  
> +	pcie_vcc_3v3: regulator-pcie-vcc3v3 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "pcie_vcc3v3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		gpio = <&gpio K1_GPIO(116) GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +	};
> +

I've noticed you dropped usb3_hub_5v which actually provide vbus supply..
so in current version, it will leave vbus as undetermined state - whether
vbus is on or not will depend on bootloader to enable it or not?

The best choice would be waiting for Marco's onboard-dev vbus patch[1],
while in K1 platform, we workaround it by force enabling vbus after power on
(set regulator as always-on)..

Link: https://lore.kernel.org/all/20260223-v6-16-topic-usb-onboard-dev-v5-0-28d3018a8026@pengutronix.de/ [1]

>  	reg_vcc_4v: regulator-vcc-4v {
>  		compatible = "regulator-fixed";
>  		regulator-name = "vcc4v0";
> @@ -44,6 +53,10 @@ led1 {
>  	};
>  };
>  
> +&combo_phy {
> +	status = "okay";
> +};
> +
>  &eth0 {
>  	phy-handle = <&rgmii0>;
>  	phy-mode = "rgmii-id";
> @@ -190,8 +203,63 @@ dldo6 {
>  	};
>  };
>  
> +&pcie1_phy {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pcie1_3_cfg>;
> +	status = "okay";
> +};
> +
> +&pcie1_port {
> +	phys = <&pcie1_phy>;
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;
> +};
> +
> +&pcie1 {
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;
> +	status = "okay";
> +};
> +
> +&pcie2_phy {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pcie2_4_cfg>;
> +	status = "okay";
> +};
> +
> +&pcie2_port {
> +	phys = <&pcie2_phy>;
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;
> +};
> +
> +&pcie2 {
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;
> +	status = "okay";
> +};
> +
>  &uart0 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&uart0_2_cfg>;
>  	status = "okay";
>  };
> +
> +&usbphy2 {
> +	status = "okay";
> +};
> +
> +&usb_dwc3 {
> +	dr_mode = "host";
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +	status = "okay";
> +
> +	hub_2_0: hub@1 {
> +		compatible = "usb5e3,610";
> +		reg = <0x1>;
> +		peer-hub = <&hub_3_0>;
> +	};
> +
> +	hub_3_0: hub@2 {
> +		compatible = "usb5e3,620";
> +		reg = <0x2>;
> +		peer-hub = <&hub_2_0>;
Can you confirm all usb ports work fine with this?

> +	};
> +};
> -- 
> 2.47.3
> 

-- 
Yixun Lan (dlan)