Comment # 8 on bug 1191417 from Takashi Iwai

(In reply to Matthias Brugger from comment #7)
> > For a long-term solution, I guess we need to extend the syntax somehow.  I
> > have no good idea how to represent such a case, though; a normal wildcard
> > doesn't fit well, as we want only a single file for fallback, after all.
> 
> Well in the code we have IWL_22000_UCODE_API_MIN which is the oldest FW that
> is supported. That could be used for fallback.

Not really, it's not guaranteed to exist, either :)

The extended MODULE_FIRMWARE() should indicate the range of ucode, and which
one is the highest priority (increasing or decreasing), at least.  But I don't
know the best way to represent it.  A notion with '%d' and some integer range
and order notion.  Hmm.