Freescale USB OTG Transceiver Driver

modulename: phy-fsl-usb.ko

and/or

fsl_usb2_otg.ko

configname: CONFIG_FSL_USB2_OTG

Linux Kernel Configuration
└─>Device Drivers
└─>USB support
└─>USB Gadget Support
└─>Freescale USB OTG Transceiver Driver
In linux kernel since version 3 (release Date: 2011-07-21)  
Enable this to support Freescale USB OTG transceiver.

source code:
drivers/usb/otg/