> The IPQ PPE includes MAC and UNIPHY integrated, the connection with > external PHY is as below. > MAC ---- UNIPHY(PCS) ---- (PCS)external PHY. > > The UNIPHY here is the Ethernet dedicated SERDES for connecting with > external PHY. You call it a PCS here. So does it implement clause 37 or 73 of the 802.3 standard? If it does, the driver for it belongs in drivers/net/pcs. Andrew