Serial device TTY port controller

modulename: serdev-ttyport.ko

configname: CONFIG_SERIAL_DEV_CTRL_TTYPORT

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial device bus
└─>Serial device TTY port controller
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
drivers/tty/serdev/serdev-ttyport.c

is selected by
CONFIG_BT_HCIUART_RTL