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Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/include/linux/devfreq-event.h

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/* SPDX-License-Identifier: GPL-2.0-only / / * devfreq-event: a framework to provide raw data and events of devfreq devices * * Copyright (C) 2014 Samsung Electronics * Author: Chanwoo Choi <cw00.choi@samsung.com> / #ifndef __LINUX_DEVFREQ_EVENT_H__ #define __LINUX_DEVFREQ_EVENT_H__ #include <linux/device.h> /* * struct devfreq_event_dev - the devfreq-event device * * @node : Contain the devfreq-event device that have been registered. * @dev : the device registered by devfreq-event class. dev.parent is * the device using devfreq-event. * @lock : a mutex to protect accessing devfreq-event. * @enable_count: the number of enable function have been called. * @desc : the description for devfreq-event device. * * This structure contains devfreq-event device information. / struct devfreq_event_dev { struct list_head node; struct device dev; struct mutex lock; u32 enable_count; const struct devfreq_event_desc desc; }; /** * struct devfreq_event_data - the devfreq-event data * * @load_count : load count of devfreq-event device for the given period. * @total_count : total count of devfreq-event device for the given period. * each count may represent a clock cycle, a time unit * (ns/us/...), or anything the device driver wants. * Generally, utilization is load_count / total_count. * * This structure contains the data of devfreq-event device for polling period. / struct devfreq_event_data { unsigned long load_count; unsigned long total_count; }; /* * struct devfreq_event_ops - the operations of devfreq-event device * * @enable : Enable the devfreq-event device. * @disable : Disable the devfreq-event device. * @reset : Reset all setting of the devfreq-event device. * @set_event : Set the specific event type for the devfreq-event device. * @get_event : Get the result of the devfreq-event devie with specific * event type. * * This structure contains devfreq-event device operations which can be * implemented by devfreq-event device drivers. / struct devfreq_event_ops { / Optional functions / int (enable)(struct devfreq_event_dev edev); int (disable)(struct devfreq_event_dev edev); int (reset)(struct devfreq_event_dev edev); / Mandatory functions / int (set_event)(struct devfreq_event_dev edev); int (get_event)(struct devfreq_event_dev edev, struct devfreq_event_data edata); }; /** * struct devfreq_event_desc - the descriptor of devfreq-event device * * @name : the name of devfreq-event device. * @event_type : the type of the event determined and used by driver * @driver_data : the private data for devfreq-event driver. * @ops : the operation to control devfreq-event device. * * Each devfreq-event device is described with a this structure. * This structure contains the various data for devfreq-event device. * The event_type describes what is going to be counted in the register. * It might choose to count e.g. read requests, write data in bytes, etc. * The full supported list of types is present in specyfic header in: * include/dt-bindings/pmu/. / struct devfreq_event_desc { const char name; u32 event_type; void driver_data; const struct devfreq_event_ops ops; }; #if defined(CONFIG_PM_DEVFREQ_EVENT) extern int devfreq_event_enable_edev(struct devfreq_event_dev edev); extern int devfreq_event_disable_edev(struct devfreq_event_dev edev); extern bool devfreq_event_is_enabled(struct devfreq_event_dev edev); extern int devfreq_event_set_event(struct devfreq_event_dev edev); extern int devfreq_event_get_event(struct devfreq_event_dev edev, struct devfreq_event_data edata); extern int devfreq_event_reset_event(struct devfreq_event_dev edev); extern struct devfreq_event_dev devfreq_event_get_edev_by_phandle( struct device dev, int index); extern int devfreq_event_get_edev_count(struct device dev); extern struct devfreq_event_dev devfreq_event_add_edev(struct device dev, struct devfreq_event_desc desc); extern int devfreq_event_remove_edev(struct devfreq_event_dev edev); extern struct devfreq_event_dev devm_devfreq_event_add_edev(struct device dev, struct devfreq_event_desc desc); extern void devm_devfreq_event_remove_edev(struct device dev, struct devfreq_event_dev edev); static inline void devfreq_event_get_drvdata(struct devfreq_event_dev edev) { return edev->desc->driver_data; } #else static inline int devfreq_event_enable_edev(struct devfreq_event_dev edev) { return -EINVAL; } static inline int devfreq_event_disable_edev(struct devfreq_event_dev edev) { return -EINVAL; } static inline bool devfreq_event_is_enabled(struct devfreq_event_dev edev) { return false; } static inline int devfreq_event_set_event(struct devfreq_event_dev edev) { return -EINVAL; } static inline int devfreq_event_get_event(struct devfreq_event_dev edev, struct devfreq_event_data edata) { return -EINVAL; } static inline int devfreq_event_reset_event(struct devfreq_event_dev edev) { return -EINVAL; } static inline struct devfreq_event_dev devfreq_event_get_edev_by_phandle( struct device dev, int index) { return ERR_PTR(-EINVAL); } static inline int devfreq_event_get_edev_count(struct device dev) { return -EINVAL; } static inline struct devfreq_event_dev devfreq_event_add_edev(struct device dev, struct devfreq_event_desc desc) { return ERR_PTR(-EINVAL); } static inline int devfreq_event_remove_edev(struct devfreq_event_dev edev) { return -EINVAL; } static inline struct devfreq_event_dev devm_devfreq_event_add_edev( struct device dev, struct devfreq_event_desc desc) { return ERR_PTR(-EINVAL); } static inline void devm_devfreq_event_remove_edev(struct device dev, struct devfreq_event_dev edev) { } static inline void devfreq_event_get_drvdata(struct devfreq_event_dev edev) { return NULL; } #endif /* CONFIG_PM_DEVFREQ_EVENT / #endif / __LINUX_DEVFREQ_EVENT_H__ */

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