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

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Date: Mon, 19 Feb 2024 16:34:51 +0100
From: Pavel Machek <pavel@....cz>
To: Chris Packham <Chris.Packham@...iedtelesis.co.nz>
Cc: "lee@...nel.org" <lee@...nel.org>,
	"linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Linux support for a 7 segment LED display

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.

Best regards,
								Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.

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