1/* SPDX-License-Identifier: GPL-2.0-only */
 2#ifndef _INPUT_POLLDEV_H
 3#define _INPUT_POLLDEV_H
 4
 5/*
 6 * Copyright (c) 2007 Dmitry Torokhov
 
 
 
 
 7 */
 8
 9#include <linux/input.h>
10#include <linux/workqueue.h>
11
12/**
13 * struct input_polled_dev - simple polled input device
14 * @private: private driver data.
15 * @open: driver-supplied method that prepares device for polling
16 *	(enabled the device and maybe flushes device state).
17 * @close: driver-supplied method that is called when device is no
18 *	longer being polled. Used to put device into low power mode.
19 * @poll: driver-supplied method that polls the device and posts
20 *	input events (mandatory).
21 * @poll_interval: specifies how often the poll() method should be called.
22 *	Defaults to 500 msec unless overridden when registering the device.
23 * @poll_interval_max: specifies upper bound for the poll interval.
24 *	Defaults to the initial value of @poll_interval.
25 * @poll_interval_min: specifies lower bound for the poll interval.
26 *	Defaults to 0.
27 * @input: input device structure associated with the polled device.
28 *	Must be properly initialized by the driver (id, name, phys, bits).
29 *
30 * Polled input device provides a skeleton for supporting simple input
31 * devices that do not raise interrupts but have to be periodically
32 * scanned or polled to detect changes in their state.
33 */
34struct input_polled_dev {
35	void *private;
36
37	void (*open)(struct input_polled_dev *dev);
38	void (*close)(struct input_polled_dev *dev);
39	void (*poll)(struct input_polled_dev *dev);
40	unsigned int poll_interval; /* msec */
41	unsigned int poll_interval_max; /* msec */
42	unsigned int poll_interval_min; /* msec */
43
44	struct input_dev *input;
45
46/* private: */
47	struct delayed_work work;
48
49	bool devres_managed;
50};
51
52struct input_polled_dev *input_allocate_polled_device(void);
53struct input_polled_dev *devm_input_allocate_polled_device(struct device *dev);
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

 
 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 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.
29 *	Defaults to 0.
30 * @input: input device structure 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