1 files changed, 13 insertions, 8 deletions

diff --git a/include/linux/iio/buffer-dma.h b/include/linux/iio/buffer-dma.h
index 5eb66a399002..ef8687a88b73 100644
--- a/include/linux/iio/buffer-dma.h
+++ b/include/linux/iio/buffer-dma.h
@@ -119,7 +119,12 @@ struct iio_dma_buffer_queue {
 	struct device *dev;
 	const struct iio_dma_buffer_ops *ops;
 
+	/*
+	 * A mutex to protect accessing, configuring (eg: enqueuing DMA blocks)
+	 * and do file IO on struct iio_dma_buffer_queue objects.
+	 */
 	struct mutex lock;
+	/* A spin lock to protect adding/removing blocks to the queue list */
 	spinlock_t list_lock;
 	struct list_head incoming;
 
@@ -136,20 +141,19 @@ struct iio_dma_buffer_queue {
  */
 struct iio_dma_buffer_ops {
 	int (*submit)(struct iio_dma_buffer_queue *queue,
-		struct iio_dma_buffer_block *block);
+		      struct iio_dma_buffer_block *block);
 	void (*abort)(struct iio_dma_buffer_queue *queue);
 };
 
 void iio_dma_buffer_block_done(struct iio_dma_buffer_block *block);
 void iio_dma_buffer_block_list_abort(struct iio_dma_buffer_queue *queue,
-	struct list_head *list);
+				     struct list_head *list);
 
-int iio_dma_buffer_enable(struct iio_buffer *buffer,
-	struct iio_dev *indio_dev);
+int iio_dma_buffer_enable(struct iio_buffer *buffer, struct iio_dev *indio_dev);
 int iio_dma_buffer_disable(struct iio_buffer *buffer,
-	struct iio_dev *indio_dev);
+			   struct iio_dev *indio_dev);
 int iio_dma_buffer_read(struct iio_buffer *buffer, size_t n,
-	char __user *user_buffer);
+			char __user *user_buffer);
 int iio_dma_buffer_write(struct iio_buffer *buffer, size_t n,
 			 const char __user *user_buffer);
 size_t iio_dma_buffer_usage(struct iio_buffer *buffer);
@@ -157,8 +161,8 @@ int iio_dma_buffer_set_bytes_per_datum(struct iio_buffer *buffer, size_t bpd);
 int iio_dma_buffer_set_length(struct iio_buffer *buffer, unsigned int length);
 int iio_dma_buffer_request_update(struct iio_buffer *buffer);
 
-int iio_dma_buffer_init(struct iio_dma_buffer_queue *queue,
-	struct device *dma_dev, const struct iio_dma_buffer_ops *ops);
+void iio_dma_buffer_init(struct iio_dma_buffer_queue *queue, struct device *dev,
+			 const struct iio_dma_buffer_ops *ops);
 void iio_dma_buffer_exit(struct iio_dma_buffer_queue *queue);
 void iio_dma_buffer_release(struct iio_dma_buffer_queue *queue);
 
@@ -174,5 +178,6 @@ int iio_dma_buffer_enqueue_dmabuf(struct iio_buffer *buffer,
 				  size_t size, bool cyclic);
 void iio_dma_buffer_lock_queue(struct iio_buffer *buffer);
 void iio_dma_buffer_unlock_queue(struct iio_buffer *buffer);
+struct device *iio_dma_buffer_get_dma_dev(struct iio_buffer *buffer);
 
 #endif