Object Exchange Model (CDC OBEX)

configname: CONFIG_USB_CONFIGFS_OBEX

USB Gadget Drivers
└─>Object Exchange Model (CDC OBEX)
In linux kernel since version 3.11 (release Date: 2013-09-02)  
You will need a user space OBEX server talking to /dev/ttyGS*,
since the kernel itself doesn't implement the OBEX protocol.