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)  
Say Y here if you want to use the Serial device bus with common TTY
drivers (e.g. serial drivers).

If unsure, say Y.

source code:
drivers/tty/serdev/serdev-ttyport.c