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 | enum iio_buffer_direction { |
15 | IIO_BUFFER_DIRECTION_IN, |
16 | IIO_BUFFER_DIRECTION_OUT, |
17 | }; |
18 | |
19 | int iio_push_to_buffers(struct iio_dev *indio_dev, const void *data); |
20 | |
21 | int iio_pop_from_buffer(struct iio_buffer *buffer, void *data); |
22 | |
23 | /** |
24 | * iio_push_to_buffers_with_timestamp() - push data and timestamp to buffers |
25 | * @indio_dev: iio_dev structure for device. |
26 | * @data: sample data |
27 | * @timestamp: timestamp for the sample data |
28 | * |
29 | * Pushes data to the IIO device's buffers. If timestamps are enabled for the |
30 | * device the function will store the supplied timestamp as the last element in |
31 | * the sample data buffer before pushing it to the device buffers. The sample |
32 | * data buffer needs to be large enough to hold the additional timestamp |
33 | * (usually the buffer should be indio->scan_bytes bytes large). |
34 | * |
35 | * Returns 0 on success, a negative error code otherwise. |
36 | */ |
37 | static inline int iio_push_to_buffers_with_timestamp(struct iio_dev *indio_dev, |
38 | void *data, int64_t timestamp) |
39 | { |
40 | if (indio_dev->scan_timestamp) { |
41 | size_t ts_offset = indio_dev->scan_bytes / sizeof(int64_t) - 1; |
42 | ((int64_t *)data)[ts_offset] = timestamp; |
43 | } |
44 | |
45 | return iio_push_to_buffers(indio_dev, data); |
46 | } |
47 | |
48 | int iio_push_to_buffers_with_ts_unaligned(struct iio_dev *indio_dev, |
49 | const void *data, size_t data_sz, |
50 | int64_t timestamp); |
51 | |
52 | bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev, |
53 | const unsigned long *mask); |
54 | |
55 | int iio_device_attach_buffer(struct iio_dev *indio_dev, |
56 | struct iio_buffer *buffer); |
57 | |
58 | #endif /* _IIO_BUFFER_GENERIC_H_ */ |
59 | |