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 */
30 struct 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
41 struct input_polled_dev *input_allocate_polled_device(void);
42 void input_free_polled_device(struct input_polled_dev *dev);
43 int input_register_polled_device(struct input_polled_dev *dev);
44 void input_unregister_polled_device(struct input_polled_dev *dev);
45
46 #endif
47
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