In message <98147894.20130412171...@serebryakov.spb.ru>, Lev Serebryakov writes
:

> I mean, there is no good way to distinguish between this (hardware)
> implementation and "true" 4 single UART chips, when it is identify
> itself as "generic 16550 UART", 4 times, at 4 I/O addresses.

That is a kernel configuration issue entirely separate from the
question about the hardware being built to allow and support
interrupt sharing in the first place.

Many old ISA cards also were not recognizable and required hint'ing,
for the exact same reason.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
p...@freebsd.org         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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