I use the Sabreauto board.
I'm trying to change the yocto debug port.
Sabre board confirmed it was uart4.
I'd like to change it to uart3.
I saw an article written by victor Wang .....https://community.nxp.com/thread/319950 <-- good
Why do I need this part to change the debug port?
SERIAL_CONSOLE = "115200 ttymxc2"
Does it not work if I change it only on uboot and kernel?