How to enable ttyS0 on my board? - coreboot

17 Feb 2017


      Dear Sir.
My own board is based on ADI SG-2440.
SG-2440 schematic is only connect(enable) the (UART1_RXD, UART1_TXD) to 
serial console port. So, only can use the "ttyS1" on kernel.
But i want to use the "ttyS0".
My board's schematic is a connect the uart0(UART0_RXD, UART0_TXD) and 
uart1(UART1_RXD, UART1_TXD) both.
But message only out the the uart1.
How can use/enable the uart0 on my board?
What source code need a modify?
Thank you.