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Sysfs entry for reading and setting of the polling interval. If the interval is set to 0, polling is stopped. Polling is restarted when interval is changed to non-zero. sysfs entries: poll = current polling interval in msec (RW) max = max allowed polling interval (RO) min = min allowed polling interval (RO) Minimum and maximum limit for interval can be set while setting up the device. Interval can be adjusted even if the input device is not currently open. [dtor@mail.ru: add kernel doc markup for the new fields] Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
#ifndef _INPUT_POLLDEV_H
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#define _INPUT_POLLDEV_H
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/*
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* Copyright (c) 2007 Dmitry Torokhov
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#include <linux/input.h>
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#include <linux/workqueue.h>
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/**
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* struct input_polled_dev - simple polled input device
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* @private: private driver data.
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* @open: driver-supplied method that prepares device for polling
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* (enabled the device and maybe flushes device state).
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* @close: driver-supplied method that is called when device is no
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* longer being polled. Used to put device into low power mode.
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* @poll: driver-supplied method that polls the device and posts
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* input events (mandatory).
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* @poll_interval: specifies how often the poll() method should be called.
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* Defaults to 500 msec unless overriden when registering the device.
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* @poll_interval_max: specifies upper bound for the poll interval.
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* Defaults to the initial value of @poll_interval.
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* @poll_interval_min: specifies lower bound for the poll interval.
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* Defaults to 0.
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* @input: input device structire associated with the polled device.
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* Must be properly initialized by the driver (id, name, phys, bits).
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*
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* Polled input device provides a skeleton for supporting simple input
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* devices that do not raise interrupts but have to be periodically
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* scanned or polled to detect changes in their state.
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*/
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struct input_polled_dev {
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void *private;
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void (*open)(struct input_polled_dev *dev);
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void (*close)(struct input_polled_dev *dev);
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void (*poll)(struct input_polled_dev *dev);
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unsigned int poll_interval; /* msec */
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unsigned int poll_interval_max; /* msec */
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unsigned int poll_interval_min; /* msec */
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struct input_dev *input;
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/* private: */
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struct delayed_work work;
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};
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struct input_polled_dev *input_allocate_polled_device(void);
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void input_free_polled_device(struct input_polled_dev *dev);
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int input_register_polled_device(struct input_polled_dev *dev);
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void input_unregister_polled_device(struct input_polled_dev *dev);
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#endif
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