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([140.116.39.229]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a78e42026fsm10568067a91.3.2026.10.05.02.38.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Oct 2026 02:38:07 -0700 (PDT) From: Chen-Yu Yeh To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen Wang , Inochi Amaoto , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti Cc: Hiago De Franco , Longbin Li , "Anton D. Stavinskii" , Joshua Milas , devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, sophgo@lists.linux.dev, linux-kernel@vger.kernel.org, Chen-Yu Yeh Subject: [PATCH v3 1/2] riscv: dts: sophgo: add Milk-V Duo 256M ethernet support overlay Date: Mon, 5 Oct 2026 17:37:48 +0800 Message-ID: <20261005093749.645014-2-chenyou910331@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261005093749.645014-1-chenyou910331@gmail.com> References: <20261005093749.645014-1-chenyou910331@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The SG2002 has an internal 10/100 Ethernet PHY, but on the Milk-V Duo 256M the Ethernet signals only reach the RJ45 connector on the optional USB & Ethernet IO board. The MAC (gmac0) and the MDIO multiplexer used to reach the internal PHY are already described in cv180x.dtsi but are disabled, and they cannot be enabled in the board devicetree because without the IO board the same pins may be used as GPIO. Add an overlay that enables them. Tested on Milk-V Duo 256M with the USB & Ethernet IO board: the link comes up at 100Mbps/Full, the interface gets an address via DHCP and passes traffic in both directions. Without the overlay, eth0 does not appear. Reviewed-by: Hiago De Franco Signed-off-by: Chen-Yu Yeh --- arch/riscv/boot/dts/sophgo/Makefile | 3 +++ .../dts/sophgo/sg2002-milkv-duo256m-eth.dtso | 17 +++++++++++++++++ 2 files changed, 20 insertions(+) create mode 100644 arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m-eth.dtso diff --git a/arch/riscv/boot/dts/sophgo/Makefile b/arch/riscv/boot/dts/sophgo/Makefile index d5c80d4ff005..49639cb0888b 100644 --- a/arch/riscv/boot/dts/sophgo/Makefile +++ b/arch/riscv/boot/dts/sophgo/Makefile @@ -4,6 +4,9 @@ dtb-$(CONFIG_ARCH_SOPHGO) += cv1812h-huashan-pi.dtb dtb-$(CONFIG_ARCH_SOPHGO) += sg2000-milkv-duo-s.dtb dtb-$(CONFIG_ARCH_SOPHGO) += sg2002-licheerv-nano-b.dtb dtb-$(CONFIG_ARCH_SOPHGO) += sg2002-milkv-duo256m.dtb +sg2002-milkv-duo256m-eth-dtbs := sg2002-milkv-duo256m.dtb sg2002-milkv-duo256m-eth.dtbo +dtb-$(CONFIG_ARCH_SOPHGO) += sg2002-milkv-duo256m-eth.dtb +dtb-$(CONFIG_ARCH_SOPHGO) += sg2002-milkv-duo256m-eth.dtbo dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-milkv-pioneer.dtb dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-evb-v1.dtb dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-evb-v2.dtb diff --git a/arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m-eth.dtso b/arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m-eth.dtso new file mode 100644 index 000000000000..cc93746d932c --- /dev/null +++ b/arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m-eth.dtso @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: (GPL-2.0 OR MIT) +/* + * Enable ethernet on Milk-V Duo 256M with the USB & Ethernet IO board. + * + * Copyright (c) 2026, Chen-Yu Yeh + */ + +/dts-v1/; +/plugin/; + +&gmac0 { + status = "okay"; +}; + +&mdio { + status = "okay"; +}; -- 2.43.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A1B84CA5FF0 for ; Mon, 5 Oct 2026 09:38:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=FkrS7jmmmPpNV7l83kNuJPy3dbsVt/mSL9+ofOlv2dc=; 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([140.116.39.229]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a78e42026fsm10568067a91.3.2026.10.05.02.38.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Oct 2026 02:38:07 -0700 (PDT) From: Chen-Yu Yeh To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen Wang , Inochi Amaoto , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti Cc: Hiago De Franco , Longbin Li , "Anton D. Stavinskii" , Joshua Milas , devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, sophgo@lists.linux.dev, linux-kernel@vger.kernel.org, Chen-Yu Yeh Subject: [PATCH v3 1/2] riscv: dts: sophgo: add Milk-V Duo 256M ethernet support overlay Date: Mon, 5 Oct 2026 17:37:48 +0800 Message-ID: <20261005093749.645014-2-chenyou910331@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261005093749.645014-1-chenyou910331@gmail.com> References: <20261005093749.645014-1-chenyou910331@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261005_023810_098146_F5CCB5BF X-CRM114-Status: GOOD ( 14.38 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The SG2002 has an internal 10/100 Ethernet PHY, but on the Milk-V Duo 256M the Ethernet signals only reach the RJ45 connector on the optional USB & Ethernet IO board. The MAC (gmac0) and the MDIO multiplexer used to reach the internal PHY are already described in cv180x.dtsi but are disabled, and they cannot be enabled in the board devicetree because without the IO board the same pins may be used as GPIO. Add an overlay that enables them. Tested on Milk-V Duo 256M with the USB & Ethernet IO board: the link comes up at 100Mbps/Full, the interface gets an address via DHCP and passes traffic in both directions. Without the overlay, eth0 does not appear. Reviewed-by: Hiago De Franco Signed-off-by: Chen-Yu Yeh --- arch/riscv/boot/dts/sophgo/Makefile | 3 +++ .../dts/sophgo/sg2002-milkv-duo256m-eth.dtso | 17 +++++++++++++++++ 2 files changed, 20 insertions(+) create mode 100644 arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m-eth.dtso diff --git a/arch/riscv/boot/dts/sophgo/Makefile b/arch/riscv/boot/dts/sophgo/Makefile index d5c80d4ff005..49639cb0888b 100644 --- a/arch/riscv/boot/dts/sophgo/Makefile +++ b/arch/riscv/boot/dts/sophgo/Makefile @@ -4,6 +4,9 @@ dtb-$(CONFIG_ARCH_SOPHGO) += cv1812h-huashan-pi.dtb dtb-$(CONFIG_ARCH_SOPHGO) += sg2000-milkv-duo-s.dtb dtb-$(CONFIG_ARCH_SOPHGO) += sg2002-licheerv-nano-b.dtb dtb-$(CONFIG_ARCH_SOPHGO) += sg2002-milkv-duo256m.dtb +sg2002-milkv-duo256m-eth-dtbs := sg2002-milkv-duo256m.dtb sg2002-milkv-duo256m-eth.dtbo +dtb-$(CONFIG_ARCH_SOPHGO) += sg2002-milkv-duo256m-eth.dtb +dtb-$(CONFIG_ARCH_SOPHGO) += sg2002-milkv-duo256m-eth.dtbo dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-milkv-pioneer.dtb dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-evb-v1.dtb dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-evb-v2.dtb diff --git a/arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m-eth.dtso b/arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m-eth.dtso new file mode 100644 index 000000000000..cc93746d932c --- /dev/null +++ b/arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m-eth.dtso @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: (GPL-2.0 OR MIT) +/* + * Enable ethernet on Milk-V Duo 256M with the USB & Ethernet IO board. + * + * Copyright (c) 2026, Chen-Yu Yeh + */ + +/dts-v1/; +/plugin/; + +&gmac0 { + status = "okay"; +}; + +&mdio { + status = "okay"; +}; -- 2.43.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv