e.g. (and I'm sure the DT folk aren't going to like it)... xlnx,axi-ethernet-X.YY.Z-2.5G (where X.YY.Z is the version) for implementations that can _only_ do 2.5G, and leave all other implementations only doing 1G and below. Or maybe some DT property. Or something else. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!