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charset=UTF-8 Date: Thu, 24 Sep 2026 22:47:32 +0800 Message-Id: Cc: , "Chao Wei" , "Chen Wang" , "Yao Zi" , "Lukasz Majewski" , "Tom Rini" , "Peng Fan" , "Jaehoon Chung" , "Stefan Roese" , "Sumit Garg" , "Inochi Amaoto" , "Conor Dooley" , "Chen-Yu Yeh" , "Chen Wang" , "Kongyang Liu" , "Leo Liang" , "Thomas Bonnefille" , "Quentin Schulz" , "Johan Jonker" , "Casey Connolly" , "Varadarajan Narayanan" , "Alexander Koch" , "Andreas Schwab" , "Junhui Liu" , "Marek Vasut" , "Sumit Garg" , "Peter Robinson" , "Ilias Apalodimas" Subject: Re: [PATCH v4 08/11] riscv: milkv_duo_256m: Use upstream devicetree From: "Zhuxu Ran" To: "Hiago De Franco" , "Zhuxu Ran" X-Mailer: aerc 0.22.0-0-gc2f86b7abde3 References: <20260922-milkv-duo-upstream-dts-v4-0-d45b74dfad36@zohomail.com> <20260922-milkv-duo-upstream-dts-v4-8-d45b74dfad36@zohomail.com> In-Reply-To: Feedback-ID: zu08011227a26ff9d3cb01405d36244a800000397c742e56ee8b6bd804c4cdbab5325317c398ab013e97a0f8:ZohoMail X-Zoho-CM-AccountID: 475a6e82b6074d1cdb8624e432e1257a5f0812bb6089f487c4846d9f660201e2 X-ZohoMailClient: External X-Mailman-Approved-At: Thu, 24 Sep 2026 17:45:05 +0000 X-BeenThere: u-boot@lists.u-boot-project.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.u-boot-project.org > I see that milkv_duo_256m_defconfig doesn't enable DM_MDIO, DM_MDIO_MUX > or MDIO_MUX_MMIOREG, so nothing binds to the mdio-mux node. > > Note that the upstream gmac0 node uses phy-mode =3D "internal" and a > phy-handle into the mdio mux, while the old local DT used phy-mode =3D > "rmii". > > Can you check this? Have you tested the ethernet port on Duo 256M? Hi Hiago, Thanks for catching this. You are right that the upstream devicetree requires the DM MDIO mux support. My earlier Ethernet test passed, but the mdio-mux node was not bound, so it did not verify the MDIO topology described by the upstream devicetree. After enabling CONFIG_DM_MDIO, CONFIG_DM_MDIO_MUX, and CONFIG_MDIO_MUX_MMIOREG, the MMIO mux, the internal MDIO bus, and the DesignWare MDIO bus are all probed. I tested this on the Milk-V Duo 256M after a cold boot; the link negotiated at 100 Mbps full duplex, and both DHCP and TFTP worked. I will add these options to milkv_duo_256m_defconfig in the next revision. --=20 Best regards, Zhuxu Ran