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

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Message-Id: <018180A5-B0D2-418E-9DBC-EF5F310F7295@endlessm.com>
Date:   Wed, 15 Nov 2017 16:08:32 +0800
From:   Chris Chiu <chiu@...lessm.com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     heikki.krogerus@...ux.intel.com, linus.walleij@...aro.org,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux@...lessm.com
Subject: Re: [PATCH] pinctrl: intel: save HOSTSW_OWN register over suspend/resume

Hi Mika,

    Yes, that’s the most weird part.

Chris

從我的 iPhone 傳送

> Mika Westerberg <mika.westerberg@...ux.intel.com> 於 2017年11月15日 下午4:04 寫道：
> 
>> On Tue, Nov 14, 2017 at 06:41:36PM +0800, Chris Chiu wrote:
>> The touchpad in the Asus laptop model X540NA is unresponsive
>> after suspend/resume. The following error appears during resume:
>> 
>> i2c_hid i2c-ELAN1200:00: failed to reset device.
>> 
>> The problem here is that i2c_hid does not notice the interrupt
>> being generated at this point. Because the GPIO which connects
>> to touchpad interrupt is in ACPI mode after resume and no longer
>> work as IRQ.
> 
> Hmm, are you saying it is initially not in ACPI mode but after resume it
> magically is?