Re: [PATCH v6] platform/x86: Add driver for ACPI INT0002 Virtual GPIO device

["Rafael J. Wysocki" <rafael@kernel.org>]

On Thu, Jun 8, 2017 at 6:45 PM, Hans de Goede <hdegoede@redhat.com> wrote:
> Hi,
>
> On 06/08/2017 05:45 PM, Darren Hart wrote:
>>
>> On Wed, Jun 07, 2017 at 05:53:38PM +0300, Andy Shevchenko wrote:
>>>
>>> On Fri, Jun 2, 2017 at 6:15 PM, Hans de Goede <hdegoede@redhat.com>
>>> wrote:
>>>>
>>>> Some peripherals on Bay Trail and Cherry Trail platforms signal a
>>>> Power Management Event (PME) to the Power Management Controller (PMC)
>>>> to wakeup the system. When this happens software needs to explicitly
>>>> clear the PME bus 0 status bit in the GPE0a_STS register to avoid an
>>>> IRQ storm on IRQ 9.
>>>>
>>>> This is modelled in ACPI through the INT0002 ACPI device, which is
>>>> called a "Virtual GPIO controller" in ACPI because it defines the
>>>> event handler to call when the PME triggers through _AEI and _L02
>>>> methods as would be done for a real GPIO interrupt in ACPI.
>>>>
>>>> This commit adds a driver which registers the Virtual GPIOs expected
>>>> by the DSDT on these devices, letting gpiolib-acpi claim the
>>>> virtual GPIO and install a GPIO-interrupt handler which call the _L02
>>>> handler as it would for a real GPIO controller.
>>>>
>>>
>>> Pushed to testing w/o Linus' tag (there is no one yet)
>>
>>
>> Will you be taking this through fixes Andy? For a 4.12-rc* target per
>> Hans'
>> response to the cover letter?
>
>
> Note that Rafael is planning to drop (revert) the commit which makes
> it (extra) desirable for this driver to get into 4.12, so we should
> perhaps reconsider that. I'm fine either way, but the primary reason
> to push this as a fix for 4.12 is no longer valid AFAICT.

Maybe I will just queue it up along with this series:
http://marc.info/?l=linux-kernel&m=149688087904433&w=2
if Andy and Darren agree?

Thanks,
Rafael