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c36cf07176
Add a basic power model to the cpu cooling device to implement the power cooling device API. The power model uses the current frequency, current load and OPPs for the power calculations. The cpus must have registered their OPPs using the OPP library. Cc: Zhang Rui <rui.zhang@intel.com> Cc: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Kapileshwar Singh <kapileshwar.singh@arm.com> Signed-off-by: Punit Agrawal <punit.agrawal@arm.com> Signed-off-by: Javi Merino <javi.merino@arm.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
/*
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* linux/include/linux/cpu_cooling.h
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*
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* Copyright (C) 2012 Samsung Electronics Co., Ltd(http://www.samsung.com)
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* Copyright (C) 2012 Amit Daniel <amit.kachhap@linaro.org>
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*
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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 as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#ifndef __CPU_COOLING_H__
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#define __CPU_COOLING_H__
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#include <linux/of.h>
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#include <linux/thermal.h>
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#include <linux/cpumask.h>
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typedef int (*get_static_t)(cpumask_t *cpumask, int interval,
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unsigned long voltage, u32 *power);
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#ifdef CONFIG_CPU_THERMAL
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/**
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* cpufreq_cooling_register - function to create cpufreq cooling device.
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* @clip_cpus: cpumask of cpus where the frequency constraints will happen
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*/
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struct thermal_cooling_device *
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cpufreq_cooling_register(const struct cpumask *clip_cpus);
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struct thermal_cooling_device *
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cpufreq_power_cooling_register(const struct cpumask *clip_cpus,
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u32 capacitance, get_static_t plat_static_func);
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/**
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* of_cpufreq_cooling_register - create cpufreq cooling device based on DT.
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* @np: a valid struct device_node to the cooling device device tree node.
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* @clip_cpus: cpumask of cpus where the frequency constraints will happen
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*/
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#ifdef CONFIG_THERMAL_OF
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struct thermal_cooling_device *
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of_cpufreq_cooling_register(struct device_node *np,
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const struct cpumask *clip_cpus);
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struct thermal_cooling_device *
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of_cpufreq_power_cooling_register(struct device_node *np,
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const struct cpumask *clip_cpus,
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u32 capacitance,
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get_static_t plat_static_func);
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#else
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static inline struct thermal_cooling_device *
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of_cpufreq_cooling_register(struct device_node *np,
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const struct cpumask *clip_cpus)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct thermal_cooling_device *
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of_cpufreq_power_cooling_register(struct device_node *np,
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const struct cpumask *clip_cpus,
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u32 capacitance,
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get_static_t plat_static_func)
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{
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return NULL;
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}
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#endif
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/**
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* cpufreq_cooling_unregister - function to remove cpufreq cooling device.
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* @cdev: thermal cooling device pointer.
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*/
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void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
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unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq);
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#else /* !CONFIG_CPU_THERMAL */
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static inline struct thermal_cooling_device *
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cpufreq_cooling_register(const struct cpumask *clip_cpus)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct thermal_cooling_device *
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cpufreq_power_cooling_register(const struct cpumask *clip_cpus,
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u32 capacitance, get_static_t plat_static_func)
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{
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return NULL;
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}
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static inline struct thermal_cooling_device *
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of_cpufreq_cooling_register(struct device_node *np,
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const struct cpumask *clip_cpus)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct thermal_cooling_device *
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of_cpufreq_power_cooling_register(struct device_node *np,
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const struct cpumask *clip_cpus,
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u32 capacitance,
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get_static_t plat_static_func)
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{
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return NULL;
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}
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static inline
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void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
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{
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return;
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}
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static inline
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unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq)
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{
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return THERMAL_CSTATE_INVALID;
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}
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#endif /* CONFIG_CPU_THERMAL */
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#endif /* __CPU_COOLING_H__ */
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