What: /sys/bus/mdio_bus/devices/.../phy_idDate: November 2012KernelVersion: 3.8Contact: netdev@vger.kernel.orgDescription: This attribute contains the 32-bit PHY Identifier as reported by the device during bus enumeration, encoded in hexadecimal. This ID is used to match the device with the appropriate driver.
What: /sys/bus/mdio_bus/devices/.../phy_interfaceDate: February 2014KernelVersion: 3.15Contact: netdev@vger.kernel.orgDescription: This attribute contains the PHY interface as configured by the Ethernet driver during bus enumeration, encoded in string. This interface mode is used to configure the Ethernet MAC with the appropriate mode for its data lines to the PHY hardware.
