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

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Date:   Mon, 15 Apr 2019 22:25:09 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Chris Chiu <chiu@...lessm.com>
Cc:     andriy.shevchenko@...el.com, heikki.krogerus@...ux.intel.com,
        drake@...lessm.com, linus.walleij@...aro.org,
        linux-gpio@...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 01:53:58PM +0800, Chris Chiu 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>

Acked-by: Mika Westerberg <mika.westerberg@...ux.intel.com>