linux-kernel - Linux support for a 7 segment LED display

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Date: Sun, 11 Feb 2024 20:46:12 +0000
From: Chris Packham <Chris.Packham@...iedtelesis.co.nz>
To: Pavel Machek <pavel@....cz>, "lee@...nel.org" <lee@...nel.org>
CC: "linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Linux support for a 7 segment LED display

Hi Blinkenlight enthusiasts,

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.

Is there an existing in-kernel driver for such a thing?

Thanks,
Chris

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[1] - https://www.kingbrightusa.com/images/catalog/SPEC/SA36-11GWA.pdf