Re: GPIO Driver for Skylake-Y PCH

[Andy Shevchenko <andriy.shevchenko@linux.intel.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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