quoted

Applied, however I removed stable notation as this change IMO does not
qualify for the stable since it does not address a regression.

It's not a regression per-se, but we want to fix buttonpad support, and
we can't do that without this patch. It's a clear bug that when the
property was added we did not set the property in the devices that need it.

The current behavior depends on userspace and is not a kernel bug,
please stop the nonsense already.

For bcm5974 devices, extracting buttonpad properties has been possible
since early 2009 (158e9287). The mechanism, predating the input
properties interface by nearly two years, has been used in the
multitouch and mtrack X drivers ever since. To those users, the
present patch has no effect at all.

Henrik