Re: [PATCH v2] pinctrl:intel: Retain HOSTSW_OWN for requested gpio pin
From: Andy Shevchenko
Date: Mon Apr 08 2019 - 13:23:44 EST
On Mon, Apr 08, 2019 at 05:51:27PM +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.
Some comments as per v1 are still applicable to this version.
--
With Best Regards,
Andy Shevchenko