44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/* The industrial I/O - event passing to userspace
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*
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* Copyright (c) 2008-2011 Jonathan Cameron
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#ifndef _IIO_EVENTS_H_
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#define _IIO_EVENTS_H_
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/**
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* struct iio_event_data - The actual event being pushed to userspace
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* @id: event identifier
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* @timestamp: best estimate of time of event occurrence (often from
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* the interrupt handler)
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*/
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struct iio_event_data {
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__u64 id;
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__s64 timestamp;
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};
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#define IIO_GET_EVENT_FD_IOCTL _IOR('i', 0x90, int)
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#define IIO_EVENT_CODE_EXTRACT_TYPE(mask) ((mask >> 56) & 0xFF)
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#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 48) & 0x7F)
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#define IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(mask) ((mask >> 32) & 0xFF)
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/* Event code number extraction depends on which type of event we have.
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* Perhaps review this function in the future*/
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#define IIO_EVENT_CODE_EXTRACT_CHAN(mask) ((__s16)(mask & 0xFFFF))
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#define IIO_EVENT_CODE_EXTRACT_CHAN2(mask) ((__s16)(((mask) >> 16) & 0xFFFF))
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#define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 40) & 0xFF)
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#define IIO_EVENT_CODE_EXTRACT_DIFF(mask) (((mask) >> 55) & 0x1)
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#endif /* _IIO_EVENTS_H_ */
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