Support for console on Samsung SoC serial port

configname: CONFIG_SERIAL_SAMSUNG_CONSOLE

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>Support for console on Samsung SoC serial port
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
Allow selection of the S3C24XX on-board serial ports for use as
an virtual console.

Even if you say Y here, the currently visible virtual console
(/dev/tty0) will still be used as the system console by default, but
you can alter that using a kernel command line option such as
"console=ttySACx". (Try "man bootparam" or see the documentation of
your boot loader about how to pass options to the kernel at
boot time.)