linux-kernel - Re: [PATCH v3] pinctrl:intel: Retain HOSTSW

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Date:   Tue, 23 Apr 2019 12:38:17 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Chris Chiu <chiu@...lessm.com>
Cc:     Andriy Shevchenko <andriy.shevchenko@...el.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Daniel Drake <drake@...lessm.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux@...lessm.com
Subject: Re: [PATCH v3] pinctrl:intel: Retain HOSTSW_OWN for requested gpio pin

On Mon, Apr 15, 2019 at 7:54 AM Chris Chiu <chiu@...lessm.com> wrote:

> The touchpad of the ASUS laptops E403NA, X540NA, X541NA are not
> responsive after suspend/resume. The following error message
> shows after resume.
>  i2c_hid i2c-ELAN1200:00: failed to reset device.
>
> On these laptops, the touchpad interrupt is connected via a GPIO
> pin which is controlled by Intel pinctrl. After system resumes,
> the GPIO is in ACPI mode and no longer works as an IRQ.
>
> This commit saves the HOSTSW_OWN value during suspend, make sure
> the HOSTSW_OWN mode remains the same after resume.
>
> Signed-off-by: Chris Chiu <chiu@...lessm.com>

This v3 patch applied with Mika's ACK.

Yours,
Linus Walleij