Hi Neil > Yes this would be a good idea if we were able to scan the internal > and external PHYs at the same time, but with our limited knowledge > the values we write in the register seems to switch a mux for the > whole RMII and MDIO signals to either interface. Ah, O.K. So you need something like: drivers/net/phy/mdio-mux-mmioreg.c This seems to be limited to a single byte for the mux register, so you might need to make some extensions. Andrew -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html