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