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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZdN1G6PfCK9/vUol@duo.ucw.cz>
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.

Download attachment "signature.asc" of type "application/pgp-signature" (196 bytes)