linux-kernel - Re: [PATCH] pinctrl: intel: save HOSTSW

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Date:   Thu, 23 Nov 2017 20:24:05 +0800
From:   Chris Chiu <chiu@...lessm.com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        Linux Upstreaming Team <linux@...lessm.com>
Subject: Re: [PATCH] pinctrl: intel: save HOSTSW_OWN register over suspend/resume

On Tue, Nov 21, 2017 at 8:04 PM, Mika Westerberg
<mika.westerberg@...ux.intel.com> wrote:
> On Tue, Nov 21, 2017 at 07:54:26PM +0800, Chris Chiu wrote:
>> Yup, I checked the value of the corresponded pin. It shows following before
>> suspend
>> pin 18 (GPIO_18) GPIO 0x40800102 0x00024075
>>
>> Then after resume
>> pin 18 (GPIO_18) GPIO 0x40800102 0x00024075 [ACPI]
>
> OK, so ownership is changed to ACPI.
>
>> What else register do you suggest me to compare? The PADCFG2 is invalid
>
> It's fine APL does not have PADCFG2.
>
> Hmm, I don't understand how this can work in Windows either. The Windows
> people told me that they don't save and restore anything else than
> padcfg registers + ie. If the ownership is changed to ACPI it means you
> don't get interrupts anymore (only GPEs) and that applies to Windows as
> well.

Thanks for your confirmation. I've pushed this back to ASUS. They told me
there's a new official BIOS released, of course they don't know
whether if it helps
or not. I then upgraded it and the problem is gone. So it's truly a
BIOS but as you
said. Thanks for your help.

Chris