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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#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 voiddevfreq_cooling_unregister(struct thermal_cooling_device *dfc){}
#endif /* CONFIG_DEVFREQ_THERMAL */#endif /* __DEVFREQ_COOLING_H__ */