linux-kernel - Re: [PATCH v9 1/1] gpio: add sloppy logic analyzer using polling

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Date: Tue, 18 Jun 2024 14:50:55 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Wolfram Sang <wsa+renesas@...g-engineering.com>, Bartosz Golaszewski <brgl@...ev.pl>, 
	Arnd Bergmann <arnd@...db.de>, Linus Walleij <linus.walleij@...aro.org>, 
	Linux-Renesas <linux-renesas-soc@...r.kernel.org>, Jonathan Corbet <corbet@....net>, 
	Kent Gibson <warthog618@...il.com>, linux-doc@...r.kernel.org, 
	linux-kernel@...r.kernel.org, 
	"open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH v9 1/1] gpio: add sloppy logic analyzer using polling

On Tue, Jun 18, 2024 at 11:23 AM Wolfram Sang
<wsa+renesas@...g-engineering.com> wrote:
>
> Hi Bart,
>
> > I could see it using configfs instead of DT for configuration and iio
> > for presenting the output but - from what Wolfram said - insisting on
> > this will simply result in this development being dropped entirely.
>
> How do you assign a GPIO via debugfs? I only found the out-of-tree
> pwm-gpio driver[1] which uses a GPIO number. But those are deprecated
> these days, or? Any other driver doing this you can point me to?
>

You mean configfs? Please take a look at my proposed gpio-virtuser
module, it should do what you want:
https://lore.kernel.org/linux-gpio/20240613092830.15761-1-brgl@bgdev.pl/

Bart

> Thanks and happy hacking,
>
>    Wolfram
>
> [1] https://lore.kernel.org/lkml/1301630392-20793-3-git-send-email-bgat@billgatliff.com/raw