1What:		/sys/bus/mdio_bus/devices/.../phy_id
2Date:		November 2012
3KernelVersion:	3.8
4Contact:	netdev@vger.kernel.org
5Description:
6		This attribute contains the 32-bit PHY Identifier as reported
7		by the device during bus enumeration, encoded in hexadecimal.
8		This ID is used to match the device with the appropriate
9		driver.
10