mdio — IEEE 802.3 Management Data Input/Output interface

       The driver was written by Stefan Bethke <stb@lassitu.de>.

Debian                                          December 17, 2015                                        MDIO(4)

       The  mdio driver provides an interconnection between the Media Access Control (MAC) sublayer and Physical
       Layer (PHY) entities' control and status registers, as defined by the IEEE 802.3 Standard.

       The mdio layer allows device drivers to share common support code for various external PHY devices.

       MDIO is one of two signal interfaces that comprise the Media Independent Interface (MII) defined  by  the
       IEEE 802.3 Standard.  The miibus(4) driver provides support for devices that require full MII support.

       The mdio driver first appeared in FreeBSD 10.0.

       mdio — IEEE 802.3 Management Data Input/Output interface

miibus(4)

       More information on MDIO can be found in the IEEE 802.3 Standard.

       To compile this driver into the kernel, place the following line in your kernel configuration file:

             devicemdio