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81 lines
2.5 KiB
81 lines
2.5 KiB
/* |
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* devfreq_cooling: Thermal cooling device implementation for devices using |
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* devfreq |
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* |
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* Copyright (C) 2014-2015 ARM Limited |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any |
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* kind, whether express or implied; without even the implied warranty |
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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#ifndef __DEVFREQ_COOLING_H__ |
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#define __DEVFREQ_COOLING_H__ |
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#include <linux/devfreq.h> |
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#include <linux/thermal.h> |
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#ifdef CONFIG_DEVFREQ_THERMAL |
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/** |
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* struct devfreq_cooling_power - Devfreq cooling power ops |
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* @get_static_power: Take voltage, in mV, and return the static power |
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* in mW. If NULL, the static power is assumed |
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* to be 0. |
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* @get_dynamic_power: Take voltage, in mV, and frequency, in HZ, and |
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* return the dynamic power draw in mW. If NULL, |
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* a simple power model is used. |
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* @dyn_power_coeff: Coefficient for the simple dynamic power model in |
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* mW/(MHz mV mV). |
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* If get_dynamic_power() is NULL, then the |
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* dynamic power is calculated as |
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* @dyn_power_coeff * frequency * voltage^2 |
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*/ |
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struct devfreq_cooling_power { |
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unsigned long (*get_static_power)(unsigned long voltage); |
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unsigned long (*get_dynamic_power)(unsigned long freq, |
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unsigned long voltage); |
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unsigned long dyn_power_coeff; |
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}; |
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struct thermal_cooling_device * |
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of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, |
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struct devfreq_cooling_power *dfc_power); |
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struct thermal_cooling_device * |
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of_devfreq_cooling_register(struct device_node *np, struct devfreq *df); |
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struct thermal_cooling_device *devfreq_cooling_register(struct devfreq *df); |
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void devfreq_cooling_unregister(struct thermal_cooling_device *dfc); |
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#else /* !CONFIG_DEVFREQ_THERMAL */ |
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struct thermal_cooling_device * |
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of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, |
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struct devfreq_cooling_power *dfc_power) |
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{ |
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return ERR_PTR(-EINVAL); |
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} |
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static inline struct thermal_cooling_device * |
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of_devfreq_cooling_register(struct device_node *np, struct devfreq *df) |
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{ |
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return ERR_PTR(-EINVAL); |
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} |
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static inline struct thermal_cooling_device * |
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devfreq_cooling_register(struct devfreq *df) |
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{ |
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return ERR_PTR(-EINVAL); |
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} |
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static inline void |
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devfreq_cooling_unregister(struct thermal_cooling_device *dfc) |
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{ |
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} |
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#endif /* CONFIG_DEVFREQ_THERMAL */ |
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#endif /* __DEVFREQ_COOLING_H__ */
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