Support for Emma Mobile integrated serial port

modulename: 8250_em.ko

configname: CONFIG_SERIAL_8250_EM

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>Support for Emma Mobile integrated serial port
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Selecting this option will add support for the integrated serial
port hardware found on the Emma Mobile line of processors.
If unsure, say N.

source code:
drivers/tty/serial/8250/8250_em.c