From: Jonathan Cameron <jic23@xxxxxxxxx>
Useful for getting to the channel based on scan mask alone.
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxx>
---
drivers/staging/iio/iio.h | 8 ++++++++
drivers/staging/iio/industrialio-core.c | 11 +++++++++++
2 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/drivers/staging/iio/iio.h b/drivers/staging/iio/iio.h
index 4aed915..95d6318 100644
--- a/drivers/staging/iio/iio.h
+++ b/drivers/staging/iio/iio.h
@@ -323,6 +323,14 @@ struct iio_dev {
};
/**
+ * iio_find_channel_from_si() - get channel from its scan index
+ * @indio_dev: device
+ * @si: scan index to match
+ */
+const struct iio_chan_spec
+*iio_find_channel_from_si(struct iio_dev *indio_dev, int si);
+
+/**
* iio_device_register() - register a device with the IIO subsystem
* @indio_dev: Device structure filled by the device driver
**/
diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c
index d8cd9e3..dbd1ce1 100644
--- a/drivers/staging/iio/industrialio-core.c
+++ b/drivers/staging/iio/industrialio-core.c
@@ -89,6 +89,17 @@ static const char * const iio_chan_info_postfix[] = {
= "filter_low_pass_3db_frequency",
};
+const struct iio_chan_spec
+*iio_find_channel_from_si(struct iio_dev *indio_dev, int si)
+{
+ int i;
+
+ for (i = 0; i < indio_dev->num_channels; i++)
+ if (indio_dev->channels[i].scan_index == si)
+ return &indio_dev->channels[i];
+ return NULL;
+}
+
/**
* struct iio_detected_event_list - list element for events that have occurred
* @list: linked list header
--
1.7.7.4
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