linux-kernel - Re: [PATCH net-next v3 5/5] riscv: dts: spacemit: Add Ethernet support for Jupiter

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Message-ID: <a2284afb-ee61-457e-aaa8-49a9ce3838f9@pigmoral.tech>
Date: Thu, 3 Jul 2025 14:48:27 +0800
From: Junhui Liu <junhui.liu@...moral.tech>
To: Vivian Wang <wangruikang@...as.ac.cn>, Andrew Lunn
 <andrew+netdev@...n.ch>, "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Yixun Lan <dlan@...too.org>,
 Philipp Zabel <p.zabel@...gutronix.de>,
 Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt
 <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
 Alexandre Ghiti <alex@...ti.fr>
Cc: Vivian Wang <uwu@...m.page>, Lukas Bulwahn <lukas.bulwahn@...hat.com>,
 Geert Uytterhoeven <geert+renesas@...der.be>,
 Parthiban Veerasooran <Parthiban.Veerasooran@...rochip.com>,
 netdev@...r.kernel.org, devicetree@...r.kernel.org,
 linux-riscv@...ts.infradead.org, spacemit@...ts.linux.dev,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v3 5/5] riscv: dts: spacemit: Add Ethernet
 support for Jupiter

Hi Vivian,
Thanks for you work!

On 2025/7/2 14:01, Vivian Wang wrote:
> Milk-V Jupiter uses an RGMII PHY for each port and uses GPIO for PHY
> reset.
>
> Signed-off-by: Vivian Wang <wangruikang@...as.ac.cn>

Successfully tested with iperf3 on Milk-V Jupiter.

TCP Rx: 941 Mbits/sec
TCP Tx: 943 Mbits/sec
UDP Rx: 956 Mbits/sec
UDP Tx: 956 Mbits/sec

Tested-by: Junhui Liu <junhui.liu@...moral.tech>

> ---
>   arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts | 46 +++++++++++++++++++++++
>   1 file changed, 46 insertions(+)
>
> diff --git a/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts b/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts
> index 4483192141049caa201c093fb206b6134a064f42..c5933555c06b66f40e61fe2b9c159ba0770c2fa1 100644
> --- a/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts
> @@ -20,6 +20,52 @@ chosen {
>   	};
>   };
>   
> +&eth0 {
> +	phy-handle = <&rgmii0>;
> +	phy-mode = "rgmii-id";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&gmac0_cfg>;
> +	rx-internal-delay-ps = <0>;
> +	tx-internal-delay-ps = <0>;
> +	status = "okay";
> +
> +	mdio-bus {
> +		#address-cells = <0x1>;
> +		#size-cells = <0x0>;
> +
> +		reset-gpios = <&gpio K1_GPIO(110) GPIO_ACTIVE_LOW>;
> +		reset-delay-us = <10000>;
> +		reset-post-delay-us = <100000>;
> +
> +		rgmii0: phy@1 {
> +			reg = <0x1>;
> +		};
> +	};
> +};
> +
> +&eth1 {
> +	phy-handle = <&rgmii1>;
> +	phy-mode = "rgmii-id";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&gmac1_cfg>;
> +	rx-internal-delay-ps = <0>;
> +	tx-internal-delay-ps = <250>;
> +	status = "okay";
> +
> +	mdio-bus {
> +		#address-cells = <0x1>;
> +		#size-cells = <0x0>;
> +
> +		reset-gpios = <&gpio K1_GPIO(115) GPIO_ACTIVE_LOW>;
> +		reset-delay-us = <10000>;
> +		reset-post-delay-us = <100000>;
> +
> +		rgmii1: phy@1 {
> +			reg = <0x1>;
> +		};
> +	};
> +};
> +
>   &uart0 {
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&uart0_2_cfg>;
>
-- 
Best regards,
Junhui Liu