quoted

If we did that, serial8250_probe() would automatically do the right thing.

Take a look at the way arch/powerpc/platforms/512x/pdm360ng.c uses a
notifier for amending a platform_device with additional data..

I tend to view arch specific embedded code as rather like very dubious
parties. What goes on in other peoples' house out of sight is none of my
business.

The 8250 however is core code so it should keep its clothers on and behave
in a manner befitting its status.

What part of the problem can't be solved by doing it properly using the
device registration interfaces we have today ?

Alan