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 * @flush: driver-supplied method that flushes device's state upon
19 *	opening (optional)
20 * @poll: driver-supplied method that polls the device and posts
21 *	input events (mandatory).
22 * @poll_interval: specifies how often the poll() method shoudl be called.
23 * @input: input device structire associated with the polled device.
24 *	Must be properly initialized by the driver (id, name, phys, bits).
25 *
26 * Polled input device provides a skeleton for supporting simple input
27 * devices that do not raise interrupts but have to be periodically
28 * scanned or polled to detect changes in their state.
29 */
30struct input_polled_dev {
31	void *private;
32
33	void (*flush)(struct input_polled_dev *dev);
34	void (*poll)(struct input_polled_dev *dev);
35	unsigned int poll_interval; /* msec */
36
37	struct input_dev *input;
38	struct delayed_work work;
39};
40
41struct input_polled_dev *input_allocate_polled_device(void);
42void input_free_polled_device(struct input_polled_dev *dev);
43int input_register_polled_device(struct input_polled_dev *dev);
44void input_unregister_polled_device(struct input_polled_dev *dev);
45
46#endif
47