iio_trigger_set_immutable
iio_trigger_set_immutable(indio_dev, dln2->trig);
EXPORT_SYMBOL(iio_trigger_set_immutable);
ret = iio_trigger_set_immutable(iio_channel_cb_get_iio_dev(data->cb_buffer),
int iio_trigger_set_immutable(struct iio_dev *indio_dev, struct iio_trigger *trig);