CONFIG_FWNODE_MDIO (not configurable)
modulename: fwnode_mdio.ko
configname: CONFIG_FWNODE_MDIO
Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>MDIO bus device drivers
└─>Device Tree and Open Firmware support
└─>FWNODE_MDIO
In linux kernel since version 5.2 (release Date: 2019-07-07)
FWNODE MDIO bus (Ethernet PHY) accessors