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