Can you help me understand the layout of the MDIO buses on the T1040RDB? In particular, Section 22.214.171.124 of T1040DPAARM lists MDIO-1, MDIO-2, MDIO-3, MDIO-4, MDIO-5 and 2 dedicated MDIOs for FMANv3. I’ve found that that first dedicated MDIO (at 0xFE4F_C000) is used for the Realtek Phy for ETH0, ETH1 and ETH2. Are the other MDIOs connected to anything?
The reason I ask is that I can’t receive data. I followed U-boot through and noticed it’s initializing something on MDIO-3 (at 0xFE4E_5000). Once that is initialized, I’m able to receive data. However, I don’t know what device is on that bus and can’t figure out why U-boot is initializing it.