| What: /sys/bus/mdio_bus/devices/.../phy_id | |
| Date: November 2012 | |
| KernelVersion: 3.8 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| 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. |