The old driver was bad in many respect, it had some race conditions, it was
using a thread to serialize transfers because of the legacy i2c interface.
It also had huge latency (typically 50ms but delays up to 300ms can happen),
thus some presses were missed.
The new driver takes advantage of the new i2c driver to do everything
asynchronously. It also does not need a thread anymore because queueing
ensures proper serialization. It provides much better and reliable latency
(typically ~2ms).
Also fix the debug screen which was horribly broken. The new screen also
displays the deadzones.
Change-Id: I69b7f99b75053e6b1d3d56beb4453c004fd2076e
Implement standard values and functions to operate on power control
register. This allow to modify both reporting rate and sleep mode
in order to save power.
Change-Id: I2bdffd4160e10eec488eb5e19de8a2a258ddbb04
Reviewed-on: http://gerrit.rockbox.org/529
Reviewed-by: Amaury Pouly <amaury.pouly@gmail.com>
Since the bootloader currently always fails at storage point (unimplemented), always enter touchpad debug screen and power off which pressing power button.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29859 a1c6a512-1295-4272-9138-f99709370657
