I found that M54455EVB linux source only support uart 0 and 1. I am trying to make it support uart 2. I did following modification in drivers/serial/mcfserial.c:
- add "console=ttyS2" to the uboot bootargs. - change .. (mcfrs_console_port ? MCFUART_BASE2 : MCFUART_BASE1)); to (mcfrs_console_port ? MCFUART_BASE3 : MCFUART_BASE1));