
Gentle reader, Am 30.08.2018 um 12:30 schrieb Peter Suetterlin:
Hi list,
I just noticed the serial_8250 driver in the opensuse kernel is set to support AND initialize/create 32 serial ports. Is this still useful on a nowadays desktop machine?
it depends, how You do define a desktop. A LInux powered scanner checkout is somehow a hybrid between a desktop and an embedded systems, and nowadays always networked. Here go cards from vendors like Comtrol, providing up to 32 ports. The serial lines are used to control the special keyboard, scanner, balance, customer display, card reader, cash drawer, printer, and, and, and... Moving the stuff to the embedded tree? Yours sincerely Christoph-Erdmann Pfeiler
And even if CONFIG_SERIAL_8250_NR_UARTS=32 is set, why not set CONFIG_SERIAL_8250_RUNTIME_UARTS to something more reasonable? (It's also set to 32).
I know I can override it with 8250.nr_uarts kernel parameter, but it would be more logical that this is used by someone who really has a lot of serial ports.
(I ran across it because wine automatically sets links in ~/.wine/dosdevices/ for serial hardware. So I end up with com1-com34, where com33 and com34 are the actually useful ones, being the ttyUSB? units almost anyone likely uses nowadays...)
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