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([140.116.39.229]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a78e42026fsm10568067a91.3.2026.10.05.02.37.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Oct 2026 02:38:01 -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 0/2] riscv: dts: sophgo: Milk-V Duo 256M ethernet support Date: Mon, 5 Oct 2026 17:37:47 +0800 Message-ID: <20261005093749.645014-1-chenyou910331@gmail.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261005_023804_183978_153A8592 X-CRM114-Status: GOOD ( 14.21 ) 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 Milk-V Duo 256M has no Ethernet connector of its own; the SG2002's internal PHY is only usable through the optional USB & Ethernet IO board. This series adds an overlay for that board and fixes the name of the internal PHY node it exposes. Changes in v3: - Rename the PHY node to ethernet-phy@1, as the commit message already said; v2 only changed the unit address (sashiko-bot). dtbs_check now validates the node against ethernet-phy.yaml, with no new warnings. - Drop the blank line in the trailer block of 2/2 (Hiago) - Collect Hiago's Reviewed-by - Keep Inochi's Reviewed-by on 2/2, since the only change is the node name Changes in v2: - Enable Ethernet through an overlay instead of in the board devicetree, since without the IO board the pins may be used as GPIO (Inochi) - Send both patches in one thread (Inochi) - Test link-up and traffic on the IO board, which v1 could not - Collect Inochi's Reviewed-by on the PHY node name fix The overlay has the same shape as Hiago's for the Milk-V Duo [1], so the two boards stay consistent. The PHY node name fix is in cv180x.dtsi and so covers that board as well. Testing, with a kernel built from this branch: - sg2002-milkv-duo256m-eth.dtb: eth0 comes up at 100Mbps/Full, gets an address via DHCP and passes traffic - sg2002-milkv-duo256m.dtb: no eth0 is created, and the gmac node reads back as disabled Kernel log with sg2002-milkv-duo256m-eth.dtb: [ 1.426499] stmmaceth 4070000.ethernet: User ID: 0x10, Synopsys ID: 0x37 [ 1.426536] stmmaceth 4070000.ethernet: DWMAC1000 [ 6.052829] stmmaceth 4070000.ethernet eth0: PHY [mdio_mux-0.0:01] driver [Generic PHY] (irq=POLL) [ 8.138131] stmmaceth 4070000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx # ip addr show eth0 2: eth0: mtu 1500 qdisc mq state UP qlen 1000 inet 192.168.0.47/24 brd 192.168.0.255 scope global dynamic noprefixroute eth0 With the base sg2002-milkv-duo256m.dtb: # ip addr show eth0 ip: can't find device 'eth0' # cat /proc/device-tree/soc/ethernet@4070000/status disabled iperf3 against a desktop on the same switch gives 94 Mbit/s with the board sending and 70-74 Mbit/s with it receiving, with no retransmissions either way. The receive side being slower is not a CPU limit on the board; I have not looked into it further yet. v1: https://lore.kernel.org/sophgo/20260803163323.74414-1-chenyou910331@gmail.com/ https://lore.kernel.org/sophgo/20260803163427.74445-1-chenyou910331@gmail.com/ v2: https://lore.kernel.org/sophgo/20261003084627.353899-1-chenyou910331@gmail.com/ [1] https://lore.kernel.org/sophgo/20261001-milkv-duo-eth-overlay-v1-1-78bc1454f35b@baylibre.com/ Chen-Yu Yeh (2): riscv: dts: sophgo: add Milk-V Duo 256M ethernet support overlay riscv: dts: sophgo: cv180x: Fix internal ephy node name arch/riscv/boot/dts/sophgo/Makefile | 3 +++ arch/riscv/boot/dts/sophgo/cv180x.dtsi | 2 +- .../dts/sophgo/sg2002-milkv-duo256m-eth.dtso | 17 +++++++++++++++++ 3 files changed, 21 insertions(+), 1 deletion(-) create mode 100644 arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m-eth.dtso -- 2.43.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj2-f38.google.com (mail-pj2-f38.google.com [74.125.227.166]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 61DEA456E0B for ; 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([140.116.39.229]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a78e42026fsm10568067a91.3.2026.10.05.02.37.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Oct 2026 02:38:01 -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 0/2] riscv: dts: sophgo: Milk-V Duo 256M ethernet support Date: Mon, 5 Oct 2026 17:37:47 +0800 Message-ID: <20261005093749.645014-1-chenyou910331@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: sophgo@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The Milk-V Duo 256M has no Ethernet connector of its own; the SG2002's internal PHY is only usable through the optional USB & Ethernet IO board. This series adds an overlay for that board and fixes the name of the internal PHY node it exposes. Changes in v3: - Rename the PHY node to ethernet-phy@1, as the commit message already said; v2 only changed the unit address (sashiko-bot). dtbs_check now validates the node against ethernet-phy.yaml, with no new warnings. - Drop the blank line in the trailer block of 2/2 (Hiago) - Collect Hiago's Reviewed-by - Keep Inochi's Reviewed-by on 2/2, since the only change is the node name Changes in v2: - Enable Ethernet through an overlay instead of in the board devicetree, since without the IO board the pins may be used as GPIO (Inochi) - Send both patches in one thread (Inochi) - Test link-up and traffic on the IO board, which v1 could not - Collect Inochi's Reviewed-by on the PHY node name fix The overlay has the same shape as Hiago's for the Milk-V Duo [1], so the two boards stay consistent. The PHY node name fix is in cv180x.dtsi and so covers that board as well. Testing, with a kernel built from this branch: - sg2002-milkv-duo256m-eth.dtb: eth0 comes up at 100Mbps/Full, gets an address via DHCP and passes traffic - sg2002-milkv-duo256m.dtb: no eth0 is created, and the gmac node reads back as disabled Kernel log with sg2002-milkv-duo256m-eth.dtb: [ 1.426499] stmmaceth 4070000.ethernet: User ID: 0x10, Synopsys ID: 0x37 [ 1.426536] stmmaceth 4070000.ethernet: DWMAC1000 [ 6.052829] stmmaceth 4070000.ethernet eth0: PHY [mdio_mux-0.0:01] driver [Generic PHY] (irq=POLL) [ 8.138131] stmmaceth 4070000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx # ip addr show eth0 2: eth0: mtu 1500 qdisc mq state UP qlen 1000 inet 192.168.0.47/24 brd 192.168.0.255 scope global dynamic noprefixroute eth0 With the base sg2002-milkv-duo256m.dtb: # ip addr show eth0 ip: can't find device 'eth0' # cat /proc/device-tree/soc/ethernet@4070000/status disabled iperf3 against a desktop on the same switch gives 94 Mbit/s with the board sending and 70-74 Mbit/s with it receiving, with no retransmissions either way. The receive side being slower is not a CPU limit on the board; I have not looked into it further yet. v1: https://lore.kernel.org/sophgo/20260803163323.74414-1-chenyou910331@gmail.com/ https://lore.kernel.org/sophgo/20260803163427.74445-1-chenyou910331@gmail.com/ v2: https://lore.kernel.org/sophgo/20261003084627.353899-1-chenyou910331@gmail.com/ [1] https://lore.kernel.org/sophgo/20261001-milkv-duo-eth-overlay-v1-1-78bc1454f35b@baylibre.com/ Chen-Yu Yeh (2): riscv: dts: sophgo: add Milk-V Duo 256M ethernet support overlay riscv: dts: sophgo: cv180x: Fix internal ephy node name arch/riscv/boot/dts/sophgo/Makefile | 3 +++ arch/riscv/boot/dts/sophgo/cv180x.dtsi | 2 +- .../dts/sophgo/sg2002-milkv-duo256m-eth.dtso | 17 +++++++++++++++++ 3 files changed, 21 insertions(+), 1 deletion(-) create mode 100644 arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m-eth.dtso -- 2.43.0