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/include/linux/input-polldev.h

https://gitlab.com/simplified-mandatory-access-control-kernel/ossecus-simplified-mandatory-access-control-kernel
C Header | 58 lines | 20 code | 8 blank | 30 comment | 0 complexity | cf714e1890293fe8895684d82a2b4190 MD5 | raw file
 1#ifndef _INPUT_POLLDEV_H
 2#define _INPUT_POLLDEV_H
 3
 4/*
 5 * Copyright (c) 2007 Dmitry Torokhov
 6 *
 7 * This program is free software; you can redistribute it and/or modify it
 8 * under the terms of the GNU General Public License version 2 as published by
 9 * the Free Software Foundation.
10 */
11
12#include <linux/input.h>
13#include <linux/workqueue.h>
14
15/**
16 * struct input_polled_dev - simple polled input device
17 * @private: private driver data.
18 * @open: driver-supplied method that prepares device for polling
19 *	(enabled the device and maybe flushes device state).
20 * @close: driver-supplied method that is called when device is no
21 *	longer being polled. Used to put device into low power mode.
22 * @poll: driver-supplied method that polls the device and posts
23 *	input events (mandatory).
24 * @poll_interval: specifies how often the poll() method should be called.
25 *	Defaults to 500 msec unless overriden when registering the device.
26 * @poll_interval_max: specifies upper bound for the poll interval.
27 *	Defaults to the initial value of @poll_interval.
28 * @poll_interval_min: specifies lower bound for the poll interval.
29 *	Defaults to 0.
30 * @input: input device structire associated with the polled device.
31 *	Must be properly initialized by the driver (id, name, phys, bits).
32 *
33 * Polled input device provides a skeleton for supporting simple input
34 * devices that do not raise interrupts but have to be periodically
35 * scanned or polled to detect changes in their state.
36 */
37struct input_polled_dev {
38	void *private;
39
40	void (*open)(struct input_polled_dev *dev);
41	void (*close)(struct input_polled_dev *dev);
42	void (*poll)(struct input_polled_dev *dev);
43	unsigned int poll_interval; /* msec */
44	unsigned int poll_interval_max; /* msec */
45	unsigned int poll_interval_min; /* msec */
46
47	struct input_dev *input;
48
49/* private: */
50	struct delayed_work work;
51};
52
53struct input_polled_dev *input_allocate_polled_device(void);
54void input_free_polled_device(struct input_polled_dev *dev);
55int input_register_polled_device(struct input_polled_dev *dev);
56void input_unregister_polled_device(struct input_polled_dev *dev);
57
58#endif