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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103/* SPDX-License-Identifier: GPL-2.0-only *//* * governor.h - internal header for devfreq governors. * * Copyright (C) 2011 Samsung Electronics * MyungJoo Ham <myungjoo.ham@samsung.com> * * This header is for devfreq governors */
#ifndef __LINUX_DEVFREQ_DEVFREQ_H__#define __LINUX_DEVFREQ_DEVFREQ_H__
#include <linux/devfreq.h>
#define DEVFREQ_NAME_LEN 16
#define to_devfreq(DEV) container_of((DEV), struct devfreq, dev)
/* Devfreq events */#define DEVFREQ_GOV_START 0x1#define DEVFREQ_GOV_STOP 0x2#define DEVFREQ_GOV_UPDATE_INTERVAL 0x3#define DEVFREQ_GOV_SUSPEND 0x4#define DEVFREQ_GOV_RESUME 0x5
#define DEVFREQ_MIN_FREQ 0#define DEVFREQ_MAX_FREQ ULONG_MAX
/* * Definition of the governor feature flags * - DEVFREQ_GOV_FLAG_IMMUTABLE * : This governor is never changeable to other governors. * - DEVFREQ_GOV_FLAG_IRQ_DRIVEN * : The devfreq won't schedule the work for this governor. */#define DEVFREQ_GOV_FLAG_IMMUTABLE BIT(0)#define DEVFREQ_GOV_FLAG_IRQ_DRIVEN BIT(1)
/* * Definition of governor attribute flags except for common sysfs attributes * - DEVFREQ_GOV_ATTR_POLLING_INTERVAL * : Indicate polling_interval sysfs attribute * - DEVFREQ_GOV_ATTR_TIMER * : Indicate timer sysfs attribute */#define DEVFREQ_GOV_ATTR_POLLING_INTERVAL BIT(0)#define DEVFREQ_GOV_ATTR_TIMER BIT(1)
/** * struct devfreq_governor - Devfreq policy governor * @node: list node - contains registered devfreq governors * @name: Governor's name * @attrs: Governor's sysfs attribute flags * @flags: Governor's feature flags * @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). * @event_handler: Callback for devfreq core framework to notify events * to governors. Events include per device governor * init and exit, opp changes out of devfreq, suspend * and resume of per device devfreq during device idle. * * Note that the callbacks are called with devfreq->lock locked by devfreq. */struct devfreq_governor { struct list_head node;
const char name[DEVFREQ_NAME_LEN]; const u64 attrs; const u64 flags; int (*get_target_freq)(struct devfreq *this, unsigned long *freq); int (*event_handler)(struct devfreq *devfreq, unsigned int event, void *data);};
void devfreq_monitor_start(struct devfreq *devfreq);void devfreq_monitor_stop(struct devfreq *devfreq);void devfreq_monitor_suspend(struct devfreq *devfreq);void devfreq_monitor_resume(struct devfreq *devfreq);void devfreq_update_interval(struct devfreq *devfreq, unsigned int *delay);
int devfreq_add_governor(struct devfreq_governor *governor);int devfreq_remove_governor(struct devfreq_governor *governor);
int devm_devfreq_add_governor(struct device *dev, struct devfreq_governor *governor);
int devfreq_update_status(struct devfreq *devfreq, unsigned long freq);int devfreq_update_target(struct devfreq *devfreq, unsigned long freq);void devfreq_get_freq_range(struct devfreq *devfreq, unsigned long *min_freq, unsigned long *max_freq);
static inline int devfreq_update_stats(struct devfreq *df){ if (!df->profile->get_dev_status) return -EINVAL;
return df->profile->get_dev_status(df->dev.parent, &df->last_status);}#endif /* __LINUX_DEVFREQ_DEVFREQ_H__ */