Atheros AR71XX/9XXX USB PHY driver

modulename: phy-ath79-usb.ko

configname: CONFIG_PHY_ATH79_USB

Linux Kernel Configuration
└─>Device Drivers
└─>PHY Subsystem
└─>Device Tree and Open Firmware support
└─>Atheros AR71XX/9XXX USB PHY driver
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Enable this to support the USB PHY on Atheros AR71XX/9XXX SoCs.

source code:

depends
CONFIG_OF
CONFIG_ATH79 or CONFIG_COMPILE_TEST