CONFIG_USB_ULPI_VIEWPORT (not configurable)

modulename: phy-ulpi-viewport.ko

configname: CONFIG_USB_ULPI_VIEWPORT

Linux Kernel Configuration
└─>Device Drivers
└─>USB support
└─>USB Physical Layer drivers
└─>USB_ULPI_VIEWPORT
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
Provides read/write operations to the ULPI phy register set for
controllers with a viewport register (e.g. Chipidea/ARC controllers).

source code:
drivers/usb/phy/phy-ulpi-viewport.c