From: Lee Jones <lee@kernel.org>
To: Chris Packham <Chris.Packham@alliedtelesis.co.nz>
Cc: Pavel Machek <pavel@ucw.cz>,
"linux-leds@vger.kernel.org" <linux-leds@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Linux support for a 7 segment LED display
Date: Mon, 19 Feb 2024 15:13:32 +0000 [thread overview]
Message-ID: <20240219151332.GC10170@google.com> (raw)
In-Reply-To: <1f598a72-dd9f-4c6c-af7f-29751f84bd23@alliedtelesis.co.nz>
On Sun, 11 Feb 2024, Chris Packham wrote:
> 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?
Why would LEDs connected to a bunch of GPIOs in a specific fashion
require a hardware driver? Doesn't drivers/leds/leds-gpio.c already
provide all the support you need?
--
Lee Jones [李琼斯]
next prev parent reply other threads:[~2024-02-19 15:13 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-11 20:46 Linux support for a 7 segment LED display Chris Packham
2024-02-19 15:13 ` Lee Jones [this message]
2024-02-19 20:12 ` Chris Packham
2024-02-20 8:18 ` Lee Jones
2024-02-20 17:30 ` Pavel Machek
2024-02-19 15:34 ` Pavel Machek
2024-02-19 20:08 ` Chris Packham
2024-02-22 21:34 ` andy.shevchenko
2024-02-22 21:53 ` Chris Packham
2024-02-22 21:59 ` Andy Shevchenko
2024-02-22 22:08 ` Chris Packham
2024-02-22 22:13 ` Andy Shevchenko
2024-02-23 3:46 ` Chris Packham
2024-02-23 7:47 ` Pavel Machek
2024-02-23 7:53 ` Geert Uytterhoeven
2024-02-23 7:51 ` Geert Uytterhoeven
2024-02-23 12:35 ` Andy Shevchenko
2024-02-23 13:01 ` Geert Uytterhoeven
2024-02-23 14:44 ` Andy Shevchenko
2024-02-22 22:34 ` Pavel Machek
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