1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Copyright 2014-2015 Analog Devices Inc.
4  *  Author: Lars-Peter Clausen <lars@metafoo.de>
5  */
6 
7 #ifndef __IIO_DMAENGINE_H__
8 #define __IIO_DMAENGINE_H__
9 
10 #include <linux/iio/buffer.h>
11 
12 struct iio_dev;
13 struct device;
14 struct dma_chan;
15 
16 void iio_dmaengine_buffer_teardown(struct iio_buffer *buffer);
17 struct iio_buffer *iio_dmaengine_buffer_setup_ext(struct device *dev,
18 						  struct iio_dev *indio_dev,
19 						  const char *channel,
20 						  enum iio_buffer_direction dir);
21 
22 #define iio_dmaengine_buffer_setup(dev, indio_dev, channel)	\
23 	iio_dmaengine_buffer_setup_ext(dev, indio_dev, channel,	\
24 				       IIO_BUFFER_DIRECTION_IN)
25 
26 int devm_iio_dmaengine_buffer_setup_ext(struct device *dev,
27 					struct iio_dev *indio_dev,
28 					const char *channel,
29 					enum iio_buffer_direction dir);
30 int devm_iio_dmaengine_buffer_setup_with_handle(struct device *dev,
31 						struct iio_dev *indio_dev,
32 						struct dma_chan *chan,
33 						enum iio_buffer_direction dir);
34 
35 #define devm_iio_dmaengine_buffer_setup(dev, indio_dev, channel)	\
36 	devm_iio_dmaengine_buffer_setup_ext(dev, indio_dev, channel,	\
37 					    IIO_BUFFER_DIRECTION_IN)
38 
39 #endif
40