fxos8700_set_active_mode
ret = fxos8700_set_active_mode(data, FXOS8700_ACCEL, true);
ret = fxos8700_set_active_mode(data, FXOS8700_MAGN, true);
fxos8700_set_active_mode(fxos8700_data, FXOS8700_ACCEL, false);
fxos8700_set_active_mode(fxos8700_data, FXOS8700_MAGN, false);