Reported by Nikolaus Schaller, Apr 6, 2018
Accelerometer axis orientation seems to fit between GTA04A3/4 (ITG3200) and GTA04A5 (BMC150), except for one axis polarity. The horizontal axis is mirrored between devices.
Comment 1 by Nikolaus Schaller, Feb 16, 2019
mount-matrix has been implemented for all iio accelerometer drivers. iio-input-bridge has been extended to detect and make use of the mount-matrix.