1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */
2*4882a593Smuzhiyun /* The industrial I/O core - generic buffer interfaces.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (c) 2008 Jonathan Cameron
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #ifndef _IIO_BUFFER_GENERIC_H_
8*4882a593Smuzhiyun #define _IIO_BUFFER_GENERIC_H_
9*4882a593Smuzhiyun #include <linux/sysfs.h>
10*4882a593Smuzhiyun #include <linux/iio/iio.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun struct iio_buffer;
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun void iio_buffer_set_attrs(struct iio_buffer *buffer,
15*4882a593Smuzhiyun const struct attribute **attrs);
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun int iio_push_to_buffers(struct iio_dev *indio_dev, const void *data);
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun /**
20*4882a593Smuzhiyun * iio_push_to_buffers_with_timestamp() - push data and timestamp to buffers
21*4882a593Smuzhiyun * @indio_dev: iio_dev structure for device.
22*4882a593Smuzhiyun * @data: sample data
23*4882a593Smuzhiyun * @timestamp: timestamp for the sample data
24*4882a593Smuzhiyun *
25*4882a593Smuzhiyun * Pushes data to the IIO device's buffers. If timestamps are enabled for the
26*4882a593Smuzhiyun * device the function will store the supplied timestamp as the last element in
27*4882a593Smuzhiyun * the sample data buffer before pushing it to the device buffers. The sample
28*4882a593Smuzhiyun * data buffer needs to be large enough to hold the additional timestamp
29*4882a593Smuzhiyun * (usually the buffer should be indio->scan_bytes bytes large).
30*4882a593Smuzhiyun *
31*4882a593Smuzhiyun * Returns 0 on success, a negative error code otherwise.
32*4882a593Smuzhiyun */
iio_push_to_buffers_with_timestamp(struct iio_dev * indio_dev,void * data,int64_t timestamp)33*4882a593Smuzhiyun static inline int iio_push_to_buffers_with_timestamp(struct iio_dev *indio_dev,
34*4882a593Smuzhiyun void *data, int64_t timestamp)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun if (indio_dev->scan_timestamp) {
37*4882a593Smuzhiyun size_t ts_offset = indio_dev->scan_bytes / sizeof(int64_t) - 1;
38*4882a593Smuzhiyun ((int64_t *)data)[ts_offset] = timestamp;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun return iio_push_to_buffers(indio_dev, data);
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev,
45*4882a593Smuzhiyun const unsigned long *mask);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun void iio_device_attach_buffer(struct iio_dev *indio_dev,
48*4882a593Smuzhiyun struct iio_buffer *buffer);
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun #endif /* _IIO_BUFFER_GENERIC_H_ */
51