linux-kernel - Re: [PATCH v1 1/1] pinctrl: intel: Save and restore pins in "direct IRQ" mode

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Date:   Mon, 28 Nov 2022 21:42:16 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andy@...nel.org>, stable@...r.kernel.org,
        Dale Smith <dalepsmith@...il.com>,
        John Harris <jmharris@...il.com>
Subject: Re: [PATCH v1 1/1] pinctrl: intel: Save and restore pins in "direct
 IRQ" mode

On Thu, Nov 24, 2022 at 11:29 PM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:

> The firmware on some systems may configure GPIO pins to be
> an interrupt source in so called "direct IRQ" mode. In such
> cases the GPIO controller driver has no idea if those pins
> are being used or not. At the same time, there is a known bug
> in the firmwares that don't restore the pin settings correctly
> after suspend, i.e. by an unknown reason the Rx value becomes
> inverted.
>
> Hence, let's save and restore the pins that are configured
> as GPIOs in the input mode with GPIROUTIOXAPIC bit set.
>
> Cc: stable@...r.kernel.org
> Reported-and-tested-by: Dale Smith <dalepsmith@...il.com>
> Reported-and-tested-by: John Harris <jmharris@...il.com>
> BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=214749
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>
> Linus, I hope that this can still make v6.1 release. I'm not going to
> send a PR for this change unless you insist.

Patch applied for fixes, plan is to get it to Torvalds
ASAP!

Yours,
Linus Walleij