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61 lines
2.2 KiB
61 lines
2.2 KiB
#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 overridden 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 structure 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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bool devres_managed; |
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}; |
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struct input_polled_dev *input_allocate_polled_device(void); |
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struct input_polled_dev *devm_input_allocate_polled_device(struct device *dev); |
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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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