include/linux/iio/events.h

Source file repositories/reference/linux-study-clean/include/linux/iio/events.h

File Facts

System
Linux kernel
Corpus path
include/linux/iio/events.h
Extension
.h
Size
2843 bytes
Lines
74
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _IIO_EVENTS_H_
#define _IIO_EVENTS_H_

#include <linux/iio/types.h>
#include <uapi/linux/iio/events.h>

/**
 * _IIO_EVENT_CODE() - create event identifier
 * @chan_type:	Type of the channel. Should be one of enum iio_chan_type.
 * @diff:	Whether the event is for an differential channel or not.
 * @modifier:	Modifier for the channel. Should be one of enum iio_modifier.
 * @direction:	Direction of the event. One of enum iio_event_direction.
 * @type:	Type of the event. Should be one of enum iio_event_type.
 * @chan:	Channel number for non-differential channels.
 * @chan1:	First channel number for differential channels.
 * @chan2:	Second channel number for differential channels.
 *
 * Drivers should use the specialized macros below instead of using this one
 * directly.
 */

#define _IIO_EVENT_CODE(chan_type, diff, modifier, direction,		\
			type, chan, chan1, chan2)			\
	(((u64)type << 56) | ((u64)diff << 55) |			\
	 ((u64)direction << 48) | ((u64)modifier << 40) |		\
	 ((u64)chan_type << 32) | (((u16)chan2) << 16) | ((u16)chan1) | \
	 ((u16)chan))


/**
 * IIO_MOD_EVENT_CODE() - create event identifier for modified (non
 * differential) channels
 * @chan_type:	Type of the channel. Should be one of enum iio_chan_type.
 * @number:	Channel number.
 * @modifier:	Modifier for the channel. Should be one of enum iio_modifier.
 * @type:	Type of the event. Should be one of enum iio_event_type.
 * @direction:	Direction of the event. One of enum iio_event_direction.
 */

#define IIO_MOD_EVENT_CODE(chan_type, number, modifier,		\
			   type, direction)				\
	_IIO_EVENT_CODE(chan_type, 0, modifier, direction, type, number, 0, 0)

/**
 * IIO_UNMOD_EVENT_CODE() - create event identifier for unmodified (non
 * differential) channels
 * @chan_type:	Type of the channel. Should be one of enum iio_chan_type.
 * @number:	Channel number.
 * @type:	Type of the event. Should be one of enum iio_event_type.
 * @direction:	Direction of the event. One of enum iio_event_direction.
 */

#define IIO_UNMOD_EVENT_CODE(chan_type, number, type, direction)	\
	_IIO_EVENT_CODE(chan_type, 0, 0, direction, type, number, 0, 0)

/**
 * IIO_DIFF_EVENT_CODE() - create event identifier for differential channels
 * @chan_type:	Type of the channel. Should be one of enum iio_chan_type.
 * @chan1:	First channel number for differential channels.
 * @chan2:	Second channel number for differential channels.
 * @type:	Type of the event. Should be one of enum iio_event_type.
 * @direction:	Direction of the event. One of enum iio_event_direction.
 */

#define IIO_DIFF_EVENT_CODE(chan_type, chan1, chan2, type, direction)	\
	_IIO_EVENT_CODE(chan_type, 1, 0, direction, type, 0, chan1, chan2)

#endif

Annotation

Implementation Notes