Hello Bruno,
I hope this information still helps you.
Unfortunately, we do not have a Linux driver for the FXAS2100 device.
In this case, I can provide you a a .zip file which includes Android 2.3 drivers for MMA845x (MMA8451, MMA8452 or MMA8453), MAG3110, MPL3115 as well as the eCompass driver. The user’s guide is also enclosed on the package. You may use this file as a reference for your design.
In case you are interested, please create a new case in order to pass you the material.
Regards,
David