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58 lines
1.8 KiB
58 lines
1.8 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* The industrial I/O core - generic buffer interfaces. |
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* |
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* Copyright (c) 2008 Jonathan Cameron |
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*/ |
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#ifndef _IIO_BUFFER_GENERIC_H_ |
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#define _IIO_BUFFER_GENERIC_H_ |
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#include <linux/sysfs.h> |
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#include <linux/iio/iio.h> |
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struct iio_buffer; |
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enum iio_buffer_direction { |
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IIO_BUFFER_DIRECTION_IN, |
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IIO_BUFFER_DIRECTION_OUT, |
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}; |
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int iio_push_to_buffers(struct iio_dev *indio_dev, const void *data); |
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int iio_pop_from_buffer(struct iio_buffer *buffer, void *data); |
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/** |
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* iio_push_to_buffers_with_timestamp() - push data and timestamp to buffers |
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* @indio_dev: iio_dev structure for device. |
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* @data: sample data |
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* @timestamp: timestamp for the sample data |
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* |
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* Pushes data to the IIO device's buffers. If timestamps are enabled for the |
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* device the function will store the supplied timestamp as the last element in |
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* the sample data buffer before pushing it to the device buffers. The sample |
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* data buffer needs to be large enough to hold the additional timestamp |
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* (usually the buffer should be indio->scan_bytes bytes large). |
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* |
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* Returns 0 on success, a negative error code otherwise. |
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*/ |
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static inline int iio_push_to_buffers_with_timestamp(struct iio_dev *indio_dev, |
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void *data, int64_t timestamp) |
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{ |
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if (indio_dev->scan_timestamp) { |
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size_t ts_offset = indio_dev->scan_bytes / sizeof(int64_t) - 1; |
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((int64_t *)data)[ts_offset] = timestamp; |
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} |
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return iio_push_to_buffers(indio_dev, data); |
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} |
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int iio_push_to_buffers_with_ts_unaligned(struct iio_dev *indio_dev, |
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const void *data, size_t data_sz, |
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int64_t timestamp); |
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bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev, |
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const unsigned long *mask); |
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int iio_device_attach_buffer(struct iio_dev *indio_dev, |
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struct iio_buffer *buffer); |
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#endif /* _IIO_BUFFER_GENERIC_H_ */
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