https://bugzilla.kernel.org/show_bug.cgi?id=84651

--- Comment #18 from Peter Amidon <[email protected]> ---
I've found some Microsoft documentation about button devices for Windows 8
Tablet and Convertible devices; it looks like they used the hardware-reduced
profile from ACPI 5.0.  I think that the right way to implement these devices
would be to implement a new driver module just for dealing with these buttons.

Here's a link to a page inthe Windows ACPI design guide for SoC platforms,
which contains, among other things, a section on button arrays: 

http://msdn.microsoft.com/en-us/library/windows/hardware/dn495671%28v=vs.85%29.aspx#button

The previous page links to this one, but I think that it looks useful, so I'll
post it here as well; it's a white paper on hardware buttons for Win8
tablet/convertible devices:

http://msdn.microsoft.com/en-us/library/windows/hardware/dn613928%28v=vs.85%29.aspx

I haven't gotten a chance to look at these too thoroughly yet, but I'll take
another look at them tomorrow.  From my quick look, it looks like the hardware
buttons are all connected to separate interrupts on the main chip, so the
kernel would need to figure out how te set those interrupt lines to be
wake-enabled.

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