Hi Hans,

On Tue, Oct 17, 2017 at 8:45 AM, Hans de Goede [off-list ref] wrote:

On some x86 tablets with a silead touchscreen the windows logo on the
front is a capacitive home button. Touching this button results in a touch
with bits 12-15 of the Y coordinates set, while normally only the lower 12
are used.

Detect this and report a KEY_LEFTMETA press when this happens. Note for
now we only respond to the Y coordinate bits 12-15 containing 0x01, on some
tablets *without* a capacative button I've noticed these bits containing
0x04 when crossing the edges of the screen.

Signed-off-by: Hans de Goede <redacted>
---
Changes in v2:
-Only enable support for the home-button if a "silead,home-button"
 boolean device-property is set on the device

You need to add this new property to
Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt
and CC Rob.

Thanks!

-- 
Dmitry