According to http://pci-ids.ucw.cz/iii//?i=1002 the 0x5975 card is "RS485" and not "RS482" as indicated in the source code macros. No functional issue, but quite confusing, since the RS482 really is 0x5974.
commit fe66cc4e02a52e1d014ae5de192c65e8abd7f58a
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