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 21:12:18 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.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 Fri, Nov 25, 2022 at 08:11:14AM +0200, Mika Westerberg wrote:
> On Fri, Nov 25, 2022 at 12:29:26AM +0200, Andy Shevchenko 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>
> 
> Thanks Andy!
> 
> Acked-by: Mika Westerberg <mika.westerberg@...ux.intel.com>

Thank you!

Linus, this would be nice to have in v6.1 release, if possible.

-- 
With Best Regards,
Andy Shevchenko