include/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 _IIO_EVENTS_H_
  10 #define _IIO_EVENTS_H_
  11
  12 #include <linux/iio/types.h>
  13 #include <uapi/linux/iio/events.h>
  14
  15 /**
  16  * IIO_EVENT_CODE() - create event identifier
  17  * @chan_type:  Type of the channel. Should be one of enum iio_chan_type.
  18  * @diff:       Whether the event is for an differential channel or not.
  19  * @modifier:   Modifier for the channel. Should be one of enum iio_modifier.
  20  * @direction:  Direction of the event. One of enum iio_event_direction.
  21  * @type:       Type of the event. Should be one of enum iio_event_type.
  22  * @chan:       Channel number for non-differential channels.
  23  * @chan1:      First channel number for differential channels.
  24  * @chan2:      Second channel number for differential channels.
  25  */
  26
  27 #define IIO_EVENT_CODE(chan_type, diff, modifier, direction,            \
  28                        type, chan, chan1, chan2)                        \
  29         (((u64)type << 56) | ((u64)diff << 55) |                        \
  30          ((u64)direction << 48) | ((u64)modifier << 40) |               \
  31          ((u64)chan_type << 32) | (((u16)chan2) << 16) | ((u16)chan1) | \
  32          ((u16)chan))
  33
  34
  35 /**
  36  * IIO_MOD_EVENT_CODE() - create event identifier for modified channels
  37  * @chan_type:  Type of the channel. Should be one of enum iio_chan_type.
  38  * @number:     Channel number.
  39  * @modifier:   Modifier for the channel. Should be one of enum iio_modifier.
  40  * @type:       Type of the event. Should be one of enum iio_event_type.
  41  * @direction:  Direction of the event. One of enum iio_event_direction.
  42  */
  43
  44 #define IIO_MOD_EVENT_CODE(chan_type, number, modifier,         \
  45                            type, direction)                             \
  46         IIO_EVENT_CODE(chan_type, 0, modifier, direction, type, number, 0, 0)
  47
  48 /**
  49  * IIO_UNMOD_EVENT_CODE() - create event identifier for unmodified channels
  50  * @chan_type:  Type of the channel. Should be one of enum iio_chan_type.
  51  * @number:     Channel number.
  52  * @type:       Type of the event. Should be one of enum iio_event_type.
  53  * @direction:  Direction of the event. One of enum iio_event_direction.
  54  */
  55
  56 #define IIO_UNMOD_EVENT_CODE(chan_type, number, type, direction)        \
  57         IIO_EVENT_CODE(chan_type, 0, 0, direction, type, number, 0, 0)
  58
  59 #endif