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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Alexander Ivanov <amivanov@fastmail.com>
Cc: "Linus Walleij" <linus.walleij@linaro.org>,
	"Valdis Klētnieks" <valdis.kletnieks@vt.edu>,
	"Bjørn Mork" <bjorn@mork.no>, "Jean Delvare" <jdelvare@suse.de>,
	kernelnewbies@kernelnewbies.org
Subject: Re: GPIO Driver for Skylake-Y PCH
Date: Tue, 25 Jun 2019 14:08:15 +0300
Message-ID: <20190625110815.GU9224@smile.fi.intel.com> (raw)
In-Reply-To: <3442d71f-1621-48b8-bbd7-7031d8a25653@www.fastmail.com>

On Mon, Jun 24, 2019 at 11:39:42AM -0700, Alexander Ivanov wrote:
> On Fri, 21 Jun 2019 10:39 -07:00, Alexander Ivanov <amivanov@fastmail.com> wrote:
> > 
> > On Fri, 21 Jun 2019 03:12 -07:00, Andy Shevchenko 
> > <andriy.shevchenko@linux.intel.com> wrote:
> > > 
> > > Usually to check this is better to run
> > > 	grep -H 15 /sys/bus/acpi/devices/*/status
> > > which return you the list of *present and available* ACPI devices.
> > 
> > 
> > It looks like INT344B device is neither present nor available. This 
> > device isn't in the list returned by above grep. 
> > Its status actually returns 0. What could be reasons for that?
> > 
> 
> Any idea why would otherwise 'visible' [1] device appear unavailable and not present [2]?
> I cannot see anything obviously wrong in kernel traces either.
> 
> 
> [1] # tree /sys/bus/acpi/devices/INT344B\:00/
> /sys/bus/acpi/devices/INT344B:00/
> ├── hid
> ├── modalias
> ├── path
> ├── power
> │   ├── autosuspend_delay_ms
> │   ├── control
> │   ├── runtime_active_time
> │   ├── runtime_status
> │   └── runtime_suspended_time
> ├── status
> ├── subsystem -> ../../../../../bus/acpi
> └── uevent
> 
> [2] # cat /sys/bus/acpi/devices/INT344B\:00/status
> 0

There is no issue with kernel. ACPI tables provided by firmware, so,
vendor of your firmware decided to turn off this device.

-- 
With Best Regards,
Andy Shevchenko



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Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-14 17:58 Alexander Ivanov
2019-06-14 18:46 ` Valdis Klētnieks
2019-06-14 19:01   ` Alexander Ivanov
2019-06-14 19:09     ` Valdis Klētnieks
2019-06-14 20:25       ` Alexander Ivanov
2019-06-14 22:40         ` Alexander Ivanov
2019-06-15  8:53           ` Bjørn Mork
2019-06-15 19:30           ` Valdis Klētnieks
2019-06-15 19:38             ` Alexander Ivanov
2019-06-15 19:56               ` Greg KH
2019-06-16  1:50               ` Valdis Klētnieks
2019-06-16  2:45                 ` Alexander Ivanov
2019-06-16  8:54                   ` Bjørn Mork
2019-06-17  8:06             ` Andy Shevchenko
2019-06-18  0:00               ` Alexander Ivanov
2019-06-18  8:40                 ` Andy Shevchenko
2019-06-18 14:48                   ` Valdis Klētnieks
2019-06-18 15:57                     ` Andy Shevchenko
2019-06-18 16:17                       ` Alexander Ivanov
2019-06-20 21:02                   ` Alexander Ivanov
2019-06-21 10:12                     ` Andy Shevchenko
2019-06-21 17:39                       ` Alexander Ivanov
2019-06-24 18:39                         ` Alexander Ivanov
2019-06-25 11:08                           ` Andy Shevchenko [this message]
2019-06-25 14:10                             ` Linus Walleij
2019-07-10 16:04                               ` Andy Shevchenko
2019-06-14 19:12   ` Bjørn Mork

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