Fix up the BUILD_ASSERT so that it does not trigger if the resolution
cpi is not specified in the devicetree and left to the default value.
Also use the correct spelling for "cpi".
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add devicetree based settings for resolution, axis inversion and sleep
mode enable. Keep the resolution setting in its own function so it can
be called by the application again in runtime if needed.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add an initial input driver for the PixArt PAT9125EL, just core
functionalities for now, will add more configuration properties at a
later stage.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
