The driver right now only allows inverting the input value, which can be
useful for differential channels but is quite confusing for single ended
ones. Implement a simple output inversion flag instead to make up for
that.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Implement suspend and resume, just stop and restart the timer that kicks
the main thread update cycles.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Swap the mutex with a semaphore for locking the calibration data.
Lighter data structure, no need to use a mutex here.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Rework the data scaling algorithm for the "deadzone" mode so that the
deadzone is subtracted from the input rather than from the output. This
makes the whole output range usable rather than making the output jump
from the center value to the minimum deadzone range.
This changes the calibration data structure as well so now all values
refer to the input data, which is more coherent.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add an input driver to read data from an analog device, such as a
thumbstick, connected to an ADC channel, and report it as an input
device.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
