include/linux/input-polldev.h

   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