include/uapi/linux/iio/events.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /* The industrial I/O - event passing to userspace
   3  *
   4  * Copyright (c) 2008-2011 Jonathan Cameron
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published by
   8  * the Free Software Foundation.
   9  */
  10 #ifndef _UAPI_IIO_EVENTS_H_
  11 #define _UAPI_IIO_EVENTS_H_
  12
  13 #include <linux/ioctl.h>
  14 #include <linux/types.h>
  15
  16 /**
  17  * struct iio_event_data - The actual event being pushed to userspace
  18  * @id:         event identifier
  19  * @timestamp:  best estimate of time of event occurrence (often from
  20  *              the interrupt handler)
  21  */
  22 struct iio_event_data {
  23         __u64   id;
  24         __s64   timestamp;
  25 };
  26
  27 #define IIO_GET_EVENT_FD_IOCTL _IOR('i', 0x90, int)
  28
  29 #define IIO_EVENT_CODE_EXTRACT_TYPE(mask) ((mask >> 56) & 0xFF)
  30
  31 #define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 48) & 0x7F)
  32
  33 #define IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(mask) ((mask >> 32) & 0xFF)
  34
  35 /* Event code number extraction depends on which type of event we have.
  36  * Perhaps review this function in the future*/
  37 #define IIO_EVENT_CODE_EXTRACT_CHAN(mask) ((__s16)(mask & 0xFFFF))
  38 #define IIO_EVENT_CODE_EXTRACT_CHAN2(mask) ((__s16)(((mask) >> 16) & 0xFFFF))
  39
  40 #define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 40) & 0xFF)
  41 #define IIO_EVENT_CODE_EXTRACT_DIFF(mask) (((mask) >> 55) & 0x1)
  42
  43 #endif /* _UAPI_IIO_EVENTS_H_ */