/* SPDX-License-Identifier: GPL-2.0-only */ #ifndef _INPUT_POLLDEV_H #define _INPUT_POLLDEV_H /* * Copyright (c) 2007 Dmitry Torokhov */ #include <linux/input.h> #include <linux/workqueue.h> /** * struct input_polled_dev - simple polled input device * @private: private driver data. * @open: driver-supplied method that prepares device for polling * (enabled the device and maybe flushes device state). * @close: driver-supplied method that is called when device is no * longer being polled. Used to put device into low power mode. * @poll: driver-supplied method that polls the device and posts * input events (mandatory). * @poll_interval: specifies how often the poll() method should be called. * Defaults to 500 msec unless overridden when registering the device. * @poll_interval_max: specifies upper bound for the poll interval. * Defaults to the initial value of @poll_interval. * @poll_interval_min: specifies lower bound for the poll interval. * Defaults to 0. * @input: input device structure associated with the polled device. * Must be properly initialized by the driver (id, name, phys, bits). * * Polled input device provides a skeleton for supporting simple input * devices that do not raise interrupts but have to be periodically * scanned or polled to detect changes in their state. */ struct input_polled_dev { void *private; void (*open)(struct input_polled_dev *dev); void (*close)(struct input_polled_dev *dev); void (*poll)(struct input_polled_dev *dev); unsigned int poll_interval; /* msec */ unsigned int poll_interval_max; /* msec */ unsigned int poll_interval_min; /* msec */ struct input_dev *input; /* private: */ struct delayed_work work; bool devres_managed; }; struct input_polled_dev *input_allocate_polled_device(void); struct input_polled_dev *devm_input_allocate_polled_device(struct device *dev); void input_free_polled_device(struct input_polled_dev *dev); int input_register_polled_device(struct input_polled_dev *dev); void input_unregister_polled_device(struct input_polled_dev *dev); #endif