1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* The industrial I/O core - generic buffer interfaces.
3 *
4 * Copyright (c) 2008 Jonathan Cameron
5 */
6
7 #ifndef _IIO_BUFFER_GENERIC_H_
8 #define _IIO_BUFFER_GENERIC_H_
9 #include <linux/sysfs.h>
10 #include <linux/iio/iio.h>
11
12 struct iio_buffer;
13
14 void iio_buffer_set_attrs(struct iio_buffer *buffer,
15 const struct attribute **attrs);
16
17 int iio_push_to_buffers(struct iio_dev *indio_dev, const void *data);
18
19 /**
20 * iio_push_to_buffers_with_timestamp() - push data and timestamp to buffers
21 * @indio_dev: iio_dev structure for device.
22 * @data: sample data
23 * @timestamp: timestamp for the sample data
24 *
25 * Pushes data to the IIO device's buffers. If timestamps are enabled for the
26 * device the function will store the supplied timestamp as the last element in
27 * the sample data buffer before pushing it to the device buffers. The sample
28 * data buffer needs to be large enough to hold the additional timestamp
29 * (usually the buffer should be indio->scan_bytes bytes large).
30 *
31 * Returns 0 on success, a negative error code otherwise.
32 */
33 static inline int iio_push_to_buffers_with_timestamp(struct iio_dev *indio_dev,
34 void *data, int64_t timestamp)
35 {
36 if (indio_dev->scan_timestamp) {
37 size_t ts_offset = indio_dev->scan_bytes / sizeof(int64_t) - 1;
38 ((int64_t *)data)[ts_offset] = timestamp;
39 }
40
41 return iio_push_to_buffers(indio_dev, data);
42 }
43
44 bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev,
45 const unsigned long *mask);
46
47 void iio_device_attach_buffer(struct iio_dev *indio_dev,
48 struct iio_buffer *buffer);
49
50 #endif /* _IIO_BUFFER_GENERIC_H_ */