Hello! In commit 84e0f1c13806 ("powerpc/mpc85xx: Add MDIO bus muxing support to the board device tree(s)") was added following DT property into DT node: arch/powerpc/boot/dts/fsl/t1023rdb.dts fm1mac3: ethernet@e4000 phy-connection-type = "sgmii-2500"; But currently kernel does not recognize this "sgmii-2500" phy mode. See file include/linux/phy.h. In my opinion it should be "2500base-x" as this is mode which operates at 2.5 Gbps. I do not think that sgmii-2500 mode exist at all (correct me if I'm wrong). Could you look at this DT property issue? What should be filled here? I'm CCing netdev and other developers as I see that there is lot of times confusion between sgmii, 1000base-x and 2500base-x modes.