| 1 | #ifndef _INPUT_POLLDEV_H
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| 2 | #define _INPUT_POLLDEV_H
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| 3 |
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| 4 | |
| 5 | * Copyright (c) 2007 Dmitry Torokhov
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| 6 | *
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| 7 | * This program is free software; you can redistribute it and/or modify it
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| 8 | * under the terms of the GNU General Public License version 2 as published by
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| 9 | * the Free Software Foundation.
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| 10 |
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| 11 |
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| 12 | #include <linux/input.h>
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| 13 | #include <linux/workqueue.h>
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| 14 |
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| 15 | |
| 16 | * struct input_polled_dev - simple polled input device
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| 17 | * @private: private driver data.
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| 18 | * @open: driver-supplied method that prepares device for polling
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| 19 | * (enabled the device and maybe flushes device state).
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| 20 | * @close: driver-supplied method that is called when device is no
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| 21 | * longer being polled. Used to put device into low power mode.
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| 22 | * @poll: driver-supplied method that polls the device and posts
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| 23 | * input events (mandatory).
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| 24 | * @poll_interval: specifies how often the poll() method should be called.
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| 25 | * Defaults to 500 msec unless overridden when registering the device.
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| 26 | * @poll_interval_max: specifies upper bound for the poll interval.
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| 27 | * Defaults to the initial value of @poll_interval.
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| 28 | * @poll_interval_min: specifies lower bound for the poll interval.
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| 29 | * Defaults to 0.
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| 30 | * @input: input device structure associated with the polled device.
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| 31 | * Must be properly initialized by the driver (id, name, phys, bits).
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| 32 | *
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| 33 | * Polled input device provides a skeleton for supporting simple input
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| 34 | * devices that do not raise interrupts but have to be periodically
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| 35 | * scanned or polled to detect changes in their state.
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| 36 |
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| 37 | struct input_polled_dev {
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| 38 | void *private;
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| 39 |
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| 40 | void (*open)(struct input_polled_dev *dev);
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| 41 | void (*close)(struct input_polled_dev *dev);
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| 42 | void (*poll)(struct input_polled_dev *dev);
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| 43 | unsigned int poll_interval;
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| 44 | unsigned int poll_interval_max;
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| 45 | unsigned int poll_interval_min;
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| 46 |
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| 47 | struct input_dev *input;
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| 48 |
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| 49 |
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| 50 | struct delayed_work work;
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| 51 |
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| 52 | bool devres_managed;
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| 53 | };
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| 54 |
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| 55 | struct input_polled_dev *input_allocate_polled_device(void);
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| 56 | struct input_polled_dev *devm_input_allocate_polled_device(struct device *dev);
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| 57 | void input_free_polled_device(struct input_polled_dev *dev);
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| 58 | int input_register_polled_device(struct input_polled_dev *dev);
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| 59 | void input_unregister_polled_device(struct input_polled_dev *dev);
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| 60 |
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| 61 | #endif
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