59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#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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#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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