Freescale XGMAC MDIO

modulename: xgmac_mdio.ko

configname: CONFIG_FSL_XGMAC_MDIO

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Ethernet driver support
└─>Freescale XGMAC MDIO
In linux kernel since version 3.1 (release Date: 2011-10-24)  
This driver supports the MDIO bus on the Fman 10G Ethernet MACs, and
on the FMan mEMAC (which supports both Clauses 22 and 45)

source code:
drivers/net/ethernet/freescale/xgmac_mdio.c