On 20/02/24 04:34, Pavel Machek wrote: > Hi! > >> I'm looking for something that I figured must exists but maybe it's so >> niche that no-one has bothered to upstream a driver for it. >> >> I have a requirement to support a 7-segment LED display[1] (one that can >> display a single digit from 0-9). Hardware wise it's just a bunch of >> individual GPIOs connected to each segment (plus an extra one for a >> dot). I can't see anything obvious in drivers/leds but maybe I'm looking >> in the wrong place. Or maybe it's the kind of thing on PC hardware that >> is just driven by the BIOS without the operating system knowing about it. > Look at drivers/auxdisplay. I believe we have segment displays there. Thanks for the pointer. I found ht16k33.c (and drivers/input/misc/yealink.c) which have support for 7 segment displays. Still not quite what I'd need to glue it together with GPIOs but I can see the direction one might head.
