Intel EG20T PCH UART

modulename: pch_uart.ko

configname: CONFIG_SERIAL_PCH_UART

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>Intel EG20T PCH UART
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
This driver is for PCH(Platform controller Hub) UART of Intel EG20T
which is an IOH(Input/Output Hub) for x86 embedded processor.
Enabling PCH_DMA, this PCH UART works as DMA mode.

source code:
drivers/tty/serial/pch_uart.c