staging:iio:in kernel users: Add a data field for channel specific info.

Used to allow information about a given channel mapping to be passed
through from board files to the consumer drivers.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>

3 files changed, 5 insertions, 0 deletions

diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index b394621d362c..d55e98fb300e 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -203,6 +203,7 @@ struct iio_channel *iio_channel_get_all(const char *name)
                 if (name && strcmp(name, c->map->consumer_dev_name) != 0)
                         continue;
                 chans[mapind].indio_dev = c->indio_dev;
+                chans[mapind].data = c->map->consumer_data;
                 chans[mapind].channel =
                         iio_chan_spec_from_name(chans[mapind].indio_dev,
                                                 c->map->adc_channel_label);
diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h
index e875bcf0478f..57efee63a6da 100644
--- a/include/linux/iio/consumer.h
+++ b/include/linux/iio/consumer.h
@@ -18,10 +18,12 @@ struct iio_chan_spec;
  * struct iio_channel - everything needed for a consumer to use a channel
  * @indio_dev:          Device on which the channel exists.
  * @channel:            Full description of the channel.
+ * @data:               Data about the channel used by consumer.
  */
 struct iio_channel {
         struct iio_dev *indio_dev;
         const struct iio_chan_spec *channel;
+        void *data;
 };
 
 /**
diff --git a/include/linux/iio/machine.h b/include/linux/iio/machine.h
index 809a3f08d5a5..1601a2a63a72 100644
--- a/include/linux/iio/machine.h
+++ b/include/linux/iio/machine.h
@@ -19,11 +19,13 @@
  * @consumer_dev_name:  Name to uniquely identify the consumer device.
  * @consumer_channel:   Unique name used to identify the channel on the
  *                      consumer side.
+ * @consumer_data:      Data about the channel for use by the consumer driver.
  */
 struct iio_map {
         const char *adc_channel_label;
         const char *consumer_dev_name;
         const char *consumer_channel;
+        void *consumer_data;
 };
 
 #endif