IIO_BACKEND_CAP_BUFFER
if (iio_backend_has_caps(st->back, IIO_BACKEND_CAP_BUFFER)) {
.caps = IIO_BACKEND_CAP_CALIBRATION | IIO_BACKEND_CAP_BUFFER |
.caps = IIO_BACKEND_CAP_CALIBRATION | IIO_BACKEND_CAP_BUFFER |
.caps = IIO_BACKEND_CAP_BUFFER | IIO_BACKEND_CAP_ENABLE,
.caps = IIO_BACKEND_CAP_BUFFER | IIO_BACKEND_CAP_ENABLE,
.caps = IIO_BACKEND_CAP_BUFFER | IIO_BACKEND_CAP_ENABLE,