Console on OMAP serial port

configname: CONFIG_SERIAL_OMAP_CONSOLE

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>Console on OMAP serial port
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
Select this option if you would like to use omap serial port as
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=ttyOx". (Try "man bootparam" or see the documentation of
your boot loader about how to pass options to the kernel at
boot time.)