diff options
Diffstat (limited to 'drivers/iio/industrialio-backend.c')
| -rw-r--r-- | drivers/iio/industrialio-backend.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c index a43c8d1bb3d0..c1eb9ef9db08 100644 --- a/drivers/iio/industrialio-backend.c +++ b/drivers/iio/industrialio-backend.c @@ -381,6 +381,34 @@ int iio_backend_data_source_set(struct iio_backend *back, unsigned int chan, EXPORT_SYMBOL_NS_GPL(iio_backend_data_source_set, "IIO_BACKEND"); /** + * iio_backend_data_source_get - Get current data source + * @back: Backend device + * @chan: Channel number + * @data: Pointer to receive the current source value + * + * A given backend may have different sources to stream/sync data. This allows + * to know what source is in use. + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_data_source_get(struct iio_backend *back, unsigned int chan, + enum iio_backend_data_source *data) +{ + int ret; + + ret = iio_backend_op_call(back, data_source_get, chan, data); + if (ret) + return ret; + + if (*data >= IIO_BACKEND_DATA_SOURCE_MAX) + return -EINVAL; + + return 0; +} +EXPORT_SYMBOL_NS_GPL(iio_backend_data_source_get, "IIO_BACKEND"); + +/** * iio_backend_set_sampling_freq - Set channel sampling rate * @back: Backend device * @chan: Channel number |