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Diffstat (limited to 'ANDROID_3.4.5/include/linux/devfreq.h')
| -rw-r--r-- | ANDROID_3.4.5/include/linux/devfreq.h | 253 |
1 files changed, 0 insertions, 253 deletions
diff --git a/ANDROID_3.4.5/include/linux/devfreq.h b/ANDROID_3.4.5/include/linux/devfreq.h deleted file mode 100644 index 281c72a3..00000000 --- a/ANDROID_3.4.5/include/linux/devfreq.h +++ /dev/null @@ -1,253 +0,0 @@ -/* - * devfreq: Generic Dynamic Voltage and Frequency Scaling (DVFS) Framework - * for Non-CPU Devices. - * - * Copyright (C) 2011 Samsung Electronics - * MyungJoo Ham <myungjoo.ham@samsung.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#ifndef __LINUX_DEVFREQ_H__ -#define __LINUX_DEVFREQ_H__ - -#include <linux/device.h> -#include <linux/notifier.h> -#include <linux/opp.h> - -#define DEVFREQ_NAME_LEN 16 - -struct devfreq; - -/** - * struct devfreq_dev_status - Data given from devfreq user device to - * governors. Represents the performance - * statistics. - * @total_time The total time represented by this instance of - * devfreq_dev_status - * @busy_time The time that the device was working among the - * total_time. - * @current_frequency The operating frequency. - * @private_data An entry not specified by the devfreq framework. - * A device and a specific governor may have their - * own protocol with private_data. However, because - * this is governor-specific, a governor using this - * will be only compatible with devices aware of it. - */ -struct devfreq_dev_status { - /* both since the last measure */ - unsigned long total_time; - unsigned long busy_time; - unsigned long current_frequency; - void *private_data; -}; - -/* - * The resulting frequency should be at most this. (this bound is the - * least upper bound; thus, the resulting freq should be lower or same) - * If the flag is not set, the resulting frequency should be at most the - * bound (greatest lower bound) - */ -#define DEVFREQ_FLAG_LEAST_UPPER_BOUND 0x1 - -/** - * struct devfreq_dev_profile - Devfreq's user device profile - * @initial_freq The operating frequency when devfreq_add_device() is - * called. - * @polling_ms The polling interval in ms. 0 disables polling. - * @target The device should set its operating frequency at - * freq or lowest-upper-than-freq value. If freq is - * higher than any operable frequency, set maximum. - * Before returning, target function should set - * freq at the current frequency. - * The "flags" parameter's possible values are - * explained above with "DEVFREQ_FLAG_*" macros. - * @get_dev_status The device should provide the current performance - * status to devfreq, which is used by governors. - * @exit An optional callback that is called when devfreq - * is removing the devfreq object due to error or - * from devfreq_remove_device() call. If the user - * has registered devfreq->nb at a notifier-head, - * this is the time to unregister it. - */ -struct devfreq_dev_profile { - unsigned long initial_freq; - unsigned int polling_ms; - - int (*target)(struct device *dev, unsigned long *freq, u32 flags); - int (*get_dev_status)(struct device *dev, - struct devfreq_dev_status *stat); - void (*exit)(struct device *dev); -}; - -/** - * struct devfreq_governor - Devfreq policy governor - * @name Governor's name - * @get_target_freq Returns desired operating frequency for the device. - * Basically, get_target_freq will run - * devfreq_dev_profile.get_dev_status() to get the - * status of the device (load = busy_time / total_time). - * If no_central_polling is set, this callback is called - * only with update_devfreq() notified by OPP. - * @init Called when the devfreq is being attached to a device - * @exit Called when the devfreq is being removed from a - * device. Governor should stop any internal routines - * before return because related data may be - * freed after exit(). - * @no_central_polling Do not use devfreq's central polling mechanism. - * When this is set, devfreq will not call - * get_target_freq with devfreq_monitor(). However, - * devfreq will call get_target_freq with - * devfreq_update() notified by OPP framework. - * - * Note that the callbacks are called with devfreq->lock locked by devfreq. - */ -struct devfreq_governor { - const char name[DEVFREQ_NAME_LEN]; - int (*get_target_freq)(struct devfreq *this, unsigned long *freq); - int (*init)(struct devfreq *this); - void (*exit)(struct devfreq *this); - const bool no_central_polling; -}; - -/** - * struct devfreq - Device devfreq structure - * @node list node - contains the devices with devfreq that have been - * registered. - * @lock a mutex to protect accessing devfreq. - * @dev device registered by devfreq class. dev.parent is the device - * using devfreq. - * @profile device-specific devfreq profile - * @governor method how to choose frequency based on the usage. - * @nb notifier block used to notify devfreq object that it should - * reevaluate operable frequencies. Devfreq users may use - * devfreq.nb to the corresponding register notifier call chain. - * @polling_jiffies interval in jiffies. - * @previous_freq previously configured frequency value. - * @next_polling the number of remaining jiffies to poll with - * "devfreq_monitor" executions to reevaluate - * frequency/voltage of the device. Set by - * profile's polling_ms interval. - * @data Private data of the governor. The devfreq framework does not - * touch this. - * @being_removed a flag to mark that this object is being removed in - * order to prevent trying to remove the object multiple times. - * @min_freq Limit minimum frequency requested by user (0: none) - * @max_freq Limit maximum frequency requested by user (0: none) - * - * This structure stores the devfreq information for a give device. - * - * Note that when a governor accesses entries in struct devfreq in its - * functions except for the context of callbacks defined in struct - * devfreq_governor, the governor should protect its access with the - * struct mutex lock in struct devfreq. A governor may use this mutex - * to protect its own private data in void *data as well. - */ -struct devfreq { - struct list_head node; - - struct mutex lock; - struct device dev; - struct devfreq_dev_profile *profile; - const struct devfreq_governor *governor; - struct notifier_block nb; - - unsigned long polling_jiffies; - unsigned long previous_freq; - unsigned int next_polling; - - void *data; /* private data for governors */ - - bool being_removed; - - unsigned long min_freq; - unsigned long max_freq; -}; - -#if defined(CONFIG_PM_DEVFREQ) -extern struct devfreq *devfreq_add_device(struct device *dev, - struct devfreq_dev_profile *profile, - const struct devfreq_governor *governor, - void *data); -extern int devfreq_remove_device(struct devfreq *devfreq); - -/* Helper functions for devfreq user device driver with OPP. */ -extern struct opp *devfreq_recommended_opp(struct device *dev, - unsigned long *freq, u32 flags); -extern int devfreq_register_opp_notifier(struct device *dev, - struct devfreq *devfreq); -extern int devfreq_unregister_opp_notifier(struct device *dev, - struct devfreq *devfreq); - -#ifdef CONFIG_DEVFREQ_GOV_POWERSAVE -extern const struct devfreq_governor devfreq_powersave; -#endif -#ifdef CONFIG_DEVFREQ_GOV_PERFORMANCE -extern const struct devfreq_governor devfreq_performance; -#endif -#ifdef CONFIG_DEVFREQ_GOV_USERSPACE -extern const struct devfreq_governor devfreq_userspace; -#endif -#ifdef CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND -extern const struct devfreq_governor devfreq_simple_ondemand; -/** - * struct devfreq_simple_ondemand_data - void *data fed to struct devfreq - * and devfreq_add_device - * @ upthreshold If the load is over this value, the frequency jumps. - * Specify 0 to use the default. Valid value = 0 to 100. - * @ downdifferential If the load is under upthreshold - downdifferential, - * the governor may consider slowing the frequency down. - * Specify 0 to use the default. Valid value = 0 to 100. - * downdifferential < upthreshold must hold. - * - * If the fed devfreq_simple_ondemand_data pointer is NULL to the governor, - * the governor uses the default values. - */ -struct devfreq_simple_ondemand_data { - unsigned int upthreshold; - unsigned int downdifferential; -}; -#endif - -#else /* !CONFIG_PM_DEVFREQ */ -static struct devfreq *devfreq_add_device(struct device *dev, - struct devfreq_dev_profile *profile, - struct devfreq_governor *governor, - void *data) -{ - return NULL; -} - -static int devfreq_remove_device(struct devfreq *devfreq) -{ - return 0; -} - -static struct opp *devfreq_recommended_opp(struct device *dev, - unsigned long *freq, u32 flags) -{ - return -EINVAL; -} - -static int devfreq_register_opp_notifier(struct device *dev, - struct devfreq *devfreq) -{ - return -EINVAL; -} - -static int devfreq_unregister_opp_notifier(struct device *dev, - struct devfreq *devfreq) -{ - return -EINVAL; -} - -#define devfreq_powersave NULL -#define devfreq_performance NULL -#define devfreq_userspace NULL -#define devfreq_simple_ondemand NULL - -#endif /* CONFIG_PM_DEVFREQ */ - -#endif /* __LINUX_DEVFREQ_H__ */ |