earlycon: no match?

[Robert Schwebel]

Hi Peter,

with 4.1-rc1, my boxes with early console enabled show something like
this (the example is vexpress, but it for example also happens on an
AM335x board):

  earlycon: no match for ttyAMA0,38400n8

The box was booted with "console=ttyAMA0,38400n8" on the commandline.
If I understand this right, the code in drivers/tty/serial/earlycon.c
calls setup_earlycon() with the string above ("ttyAMA0,38400n8") and
fails to find that string in the "names" part of the __earlycon_table,
because for the pl011 component on vexpress, the early console was
registered in drivers/tty/serial/amba-pl011.c with:

OF_EARLYCON_DECLARE(pl011, "arm,pl011", pl011_early_console_setup);
                    ^^^^^ name

So isn't that trying to match "ttyAMA0" against "arm,pl011"? I have the
feeling that I didn't understand the logic behind that.

Can you elaborate about how this is supposed to work correctly?

Thanks,
rsc
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