1What: /sys/class/mdio_bus/<bus>/<device>/attached_dev 2Date: May 2017 3KernelVersion: 4.13 4Contact: netdev@vger.kernel.org 5Description: 6 Symbolic link to the network device this PHY device is 7 attached to. 8 9What: /sys/class/mdio_bus/<bus>/<device>/phy_has_fixups 10Date: February 2014 11KernelVersion: 3.15 12Contact: netdev@vger.kernel.org 13Description: 14 This attribute contains the boolean value whether a given PHY 15 device has had any "fixup" workaround running on it, encoded as 16 a boolean. This information is provided to help troubleshooting 17 PHY configurations. 18 19What: /sys/class/mdio_bus/<bus>/<device>/phy_id 20Date: November 2012 21KernelVersion: 3.8 22Contact: netdev@vger.kernel.org 23Description: 24 This attribute contains the 32-bit PHY Identifier as reported 25 by the device during bus enumeration, encoded in hexadecimal. 26 This ID is used to match the device with the appropriate 27 driver. 28 29What: /sys/class/mdio_bus/<bus>/<device>/phy_interface 30Date: February 2014 31KernelVersion: 3.15 32Contact: netdev@vger.kernel.org 33Description: 34 This attribute contains the PHY interface as configured by the 35 Ethernet driver during bus enumeration, encoded in string. 36 This interface mode is used to configure the Ethernet MAC with the 37 appropriate mode for its data lines to the PHY hardware. 38 39 Possible values are: 40 41 <empty> (not available), mii, gmii, sgmii, tbi, rev-mii, 42 rmii, rgmii, rgmii-id, rgmii-rxid, rgmii-txid, rtbi, smii 43 xgmii, moca, qsgmii, trgmii, 1000base-x, 2500base-x, rxaui, 44 xaui, 10gbase-kr, unknown 45 46What: /sys/class/mdio_bus/<bus>/<device>/phy_standalone 47Date: May 2019 48KernelVersion: 5.3 49Contact: netdev@vger.kernel.org 50Description: 51 Boolean value indicating whether the PHY device is used in 52 standalone mode, without a net_device associated, by PHYLINK. 53 Attribute created only when this is the case. 54 55What: /sys/class/mdio_bus/<bus>/<device>/phy_dev_flags 56Date: March 2021 57KernelVersion: 5.13 58Contact: netdev@vger.kernel.org 59Description: 60 32-bit hexadecimal number representing a bit mask of the 61 configuration bits passed from the consumer of the PHY 62 (Ethernet MAC, switch, etc.) to the PHY driver. The flags are 63 only used internally by the kernel and their placement are 64 not meant to be stable across kernel versions. This is intended 65 for facilitating the debugging of PHY drivers. 66