> The IR driver would be the clear owner of the entire device. Of course,
> this still only works if we get rid of the 8250 blind probe for 0x3e8
> or figure out some API for the IR driver to tell the 8250 driver to get
> its mitts off.
As far as I can see all we need is something of the form
serial8250_claim_uart(unsigned long ioaddr, int type)
(type as we don't have iomap on most platforms yet)
returning
-EBUSY "serial port is open"
-ENOENT "never heard of it"
0 "ok"
and
serial8250_unclaim_uart(unsigned long ioaddr, int type)
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