linux-kernel - Re: [PATCH] gpiolib: TODO: add an item about GPIO safe-state

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Message-ID: <CACRpkdZaSL_pkmrVGOT-y7+3i4y6f6Cjgehycq2FKLwPxrbFvw@mail.gmail.com>
Date:   Thu, 15 Sep 2022 10:58:50 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Kent Gibson <warthog618@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Drew Fustini <dfustini@...libre.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] gpiolib: TODO: add an item about GPIO safe-state

On Wed, Sep 14, 2022 at 5:11 PM Bartosz Golaszewski <brgl@...ev.pl> wrote:

> This adds a new TODO item for gpiolib and can also be used to start
> a discussion about the need for it and implementation details.
>
> Signed-off-by: Bartosz Golaszewski <brgl@...ev.pl>

Acked-by: Linus Walleij <linus.walleij@...aro.org>

Several approaches have been tried in the past. Consider adding
these lore links:

"[PATCH 3/4] gpio: dt-bindings: Declare gpio-hog optional for GPIO
subnodes" (2016)
https://lore.kernel.org/linux-devicetree/1456214089-13954-3-git-send-email-mpa@pengutronix.de/
"[PATCH] gpio: 74x164: add lines-initial-states property" (2018)
https://lore.kernel.org/lkml/20180815201855.29738-1-mail@david-bauer.net/"
"[RFC] Initial state for GPIOs" (2019)
https://lore.kernel.org/linux-gpio/bee53b48c96603ae8970d42bc4bff386b876bc51.camel@collabora.com/

Just so we don't have to constantly look them up for referral.

Yours,
Linus Walleij