Please trim the text when replying. > I'm writing below as a mix of patch log and discussion. > > Phylink bindings are required for ports that are controlled by OF-based > buses. DSA, like any other driver utilising the Linux MDIO infrastructure, > can register a bus. If I understand correctly, non-OF-based registration of > OpenFirmware MDIO buses is a feature specific to DSA which certain DSA > subdrivers make use of. This is not really DSA specific. Any MAC driver, or MDIO driver, can call mdiobus_regsiter(), or of_mdiobus_register() and pass a NULL pointer if there is no OF node available. It then requires that the MAC driver uses an function like phy_find_first(), or knows via other means what address the PHY uses on the bus. For DSA, that other means is assuming a 1:1 mapping between port number and bus address. Andrew
