B53 MDIO connected switch driver

modulename: b53_mdio.ko

configname: CONFIG_B53_MDIO_DRIVER

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Distributed Switch Architecture drivers
└─>Broadcom BCM53xx managed switch support
└─>B53 MDIO connected switch driver
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Select to enable support for registering switches configured through MDIO.

source code: