[PATCH v4 03/12] staging: iio: ad2s1200: Add kernel docs to driver state

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Add missing kernel docs to the ad2s1200 driver state.

Signed-off-by: David Veenstra <davidjulianveenstra@xxxxxxxxx>
---
Changes in v4:
 - Simplified explanation of lock.

 drivers/staging/iio/resolver/ad2s1200.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/staging/iio/resolver/ad2s1200.c b/drivers/staging/iio/resolver/ad2s1200.c
index 9bdcf0c86217..068aa86e9c11 100644
--- a/drivers/staging/iio/resolver/ad2s1200.c
+++ b/drivers/staging/iio/resolver/ad2s1200.c
@@ -32,6 +32,14 @@
 /* clock period in nano second */
 #define AD2S1200_TSCLK	(1000000000 / AD2S1200_HZ)
 
+/**
+ * struct ad2s1200_state - driver instance specific data.
+ * @lock:	protects both the GPIO pins and the rx buffer.
+ * @sdev:	spi device.
+ * @sample:	GPIO pin SAMPLE.
+ * @rdvel:	GPIO pin RDVEL.
+ * @rx:		buffer for spi transfers.
+ */
 struct ad2s1200_state {
 	struct mutex lock;
 	struct spi_device *sdev;
-- 
2.17.0

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