[PATCH 1/3] iio: imu: adis: add doc-string for `adis` struct

[Alexandru Ardelean <alexandru.ardelean@analog.com>]

This change adds a doc-string for the `adis` struct. It details the fields
and their roles.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---
 include/linux/iio/imu/adis.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
index 48444f28b003..dbdf421d35dd 100644
--- a/include/linux/iio/imu/adis.h
+++ b/include/linux/iio/imu/adis.h
@@ -54,6 +54,20 @@ struct adis_data {
 	bool has_paging;
 };
 
+/**
+ * struct adis - ADIS device instance data
+ * @spi: Reference to SPI device which owns this ADIS IIO device
+ * @trig: IIO trigger object data
+ * @data: ADIS chip variant specific data
+ * @burst: ADIS burst transfer information
+ * @state_lock: Lock used by the device to protect state
+ * @msg: SPI message object
+ * @xfer: SPI transfer objects to be used for a @msg
+ * @current_page: Some ADIS devices have registers, this selects current page
+ * @buffer: Data buffer for information read from the device
+ * @tx: Cacheline aligned TX buffer for SPI transfers
+ * @rx: Cacheline aligned RX buffer for SPI transfers
+ */
 struct adis {
 	struct spi_device	*spi;
 	struct iio_trigger	*trig;
-- 
2.20.1