tree e1c0eeef8780ab788f52fbf13f5951425d832535
parent 4baa69ddd25296ee40e84c230af88d1fc7e229a7
author Prashant Malani <pmalani@google.com> 1439342968 -0700
committer Prashant Malani <pmalani@google.com> 1442264121 -0700

inputflinger: Initial support for rotary encoders.

This change introduces support for rotary encoder input devices.

We also define a new input source (namely, AINPUT_SOURCE_ROTARY_ENCODER)
and a new axis of input (namely, AXIS_SCROLL), since the rotary encoder
motion doesn't necessarily tie to a horizontal or vertical scroll
motion.

A ROTARY_ENCODER input device class is also introduced, corresponding to
the new input source.

A new input source can be defined as producing rotary encoder motion
events, if its corresponding .idc file contains the following
declaration:

    device.type = rotaryEncoder

Bug: 18707397

Change-Id: I8ccd540908311d1ff44fdfeba81b691895413641
Signed-off-by: Prashant Malani <pmalani@google.com>