include/uapi/linux/iio/events.h

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