1 #ifndef _INPUT_POLLDEV_H
2 #define _INPUT_POLLDEV_H
5 * Copyright (c) 2007 Dmitry Torokhov
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.
12 #include <linux/input.h>
13 #include <linux/workqueue.h>
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 overridden 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.
30 * @input: input device structure associated with the polled device.
31 * Must be properly initialized by the driver (id, name, phys, bits).
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.
37 struct input_polled_dev
{
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 */
47 struct input_dev
*input
;
50 struct delayed_work work
;
55 struct input_polled_dev
*input_allocate_polled_device(void);
56 struct input_polled_dev
*devm_input_allocate_polled_device(struct device
*dev
);
57 void input_free_polled_device(struct input_polled_dev
*dev
);
58 int input_register_polled_device(struct input_polled_dev
*dev
);
59 void input_unregister_polled_device(struct input_polled_dev
*dev
);
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