name : devfreq_cooling.h /* SPDX-License-Identifier: GPL-2.0 */ /* * devfreq_cooling: Thermal cooling device implementation for devices using * devfreq * * Copyright (C) 2014-2015 ARM Limited * */ #ifndef __DEVFREQ_COOLING_H__ #define __DEVFREQ_COOLING_H__ #include <linux/devfreq.h> #include <linux/thermal.h> /** * struct devfreq_cooling_power - Devfreq cooling power ops * @get_real_power: When this is set, the framework uses it to ask the * device driver for the actual power. * Some devices have more sophisticated methods * (like power counters) to approximate the actual power * that they use. * This function provides more accurate data to the * thermal governor. When the driver does not provide * such function, framework just uses pre-calculated * table and scale the power by 'utilization' * (based on 'busy_time' and 'total_time' taken from * devfreq 'last_status'). * The value returned by this function must be lower * or equal than the maximum power value * for the current state * (which can be found in power_table[state]). * When this interface is used, the power_table holds * max total (static + dynamic) power value for each OPP. */ struct devfreq_cooling_power { int (*get_real_power)(struct devfreq *df, u32 *power, unsigned long freq, unsigned long voltage); }; #ifdef CONFIG_DEVFREQ_THERMAL struct thermal_cooling_device * of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, struct devfreq_cooling_power *dfc_power); struct thermal_cooling_device * of_devfreq_cooling_register(struct device_node *np, struct devfreq *df); struct thermal_cooling_device *devfreq_cooling_register(struct devfreq *df); void devfreq_cooling_unregister(struct thermal_cooling_device *dfc); struct thermal_cooling_device * devfreq_cooling_em_register(struct devfreq *df, struct devfreq_cooling_power *dfc_power); #else /* !CONFIG_DEVFREQ_THERMAL */ static inline struct thermal_cooling_device * of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, struct devfreq_cooling_power *dfc_power) { return ERR_PTR(-EINVAL); } static inline struct thermal_cooling_device * of_devfreq_cooling_register(struct device_node *np, struct devfreq *df) { return ERR_PTR(-EINVAL); } static inline struct thermal_cooling_device * devfreq_cooling_register(struct devfreq *df) { return ERR_PTR(-EINVAL); } static inline struct thermal_cooling_device * devfreq_cooling_em_register(struct devfreq *df, struct devfreq_cooling_power *dfc_power) { return ERR_PTR(-EINVAL); } static inline void devfreq_cooling_unregister(struct thermal_cooling_device *dfc) { } #endif /* CONFIG_DEVFREQ_THERMAL */ #endif /* __DEVFREQ_COOLING_H__ */