I have a custom board with Ethernet directly connected to an on board switch (phy-less). I am trying to configure the PDK drivers to work without a phy, using a fixed configuration.The PDK I am using is for the am437x, v1.0.15. This is possible in linux by using "fixed-link" in the device tree. I need the same functionality from the TI drivers. How can I configure the EMAC to communicate directly with the on board switch, using a fixed configuration? Any help is greatly appreciated.