GitLab

base-uboot: provide explicit earlycon support

Some boards use console_device to set their earlycon parameter, others
use extra_boot_args. extra_boot_args may already be used by a test
template, e.g. kernelci already uses that parameter. If you (mis-)use
console_device you have to make sure you put it before the actual device
string, because the baudrate and console parameters are appended. For
example you have to use "set console_device 'earlycon ttyS0'" and must
not use "set console_device 'ttyS0 earlycon'".

Make it easier for the user and provide a native method to set the
earlycon parameter through console_earlycon.

Signed-off-by: Michael Walle <michael@walle.cc>