60b79ba222
Add a blocking notifier to send a notification when a CPU enters or leaves the max cooling level state. Also add an API to retrieve the cpumask that contains all CPUs that are in max cooling state. Interested clients like core_ctl subscribe to these notifications and manage CPUs accordingly. Change-Id: I4828ed572fa965b5bfce8184ef813fddfb246cb1 Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org> [satyap@codeaurora.org: resolve trivial merge conflicts] Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
158 lines
4.5 KiB
C
158 lines
4.5 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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struct cpufreq_policy;
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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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typedef int (*plat_mitig_t)(int cpu, u32 clip_freq);
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struct cpu_cooling_ops {
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plat_mitig_t ceil_limit, floor_limit;
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};
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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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* @policy: cpufreq policy.
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*/
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struct thermal_cooling_device *
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cpufreq_cooling_register(struct cpufreq_policy *policy);
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struct thermal_cooling_device *
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cpufreq_power_cooling_register(struct cpufreq_policy *policy,
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u32 capacitance, get_static_t plat_static_func);
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struct thermal_cooling_device *
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cpufreq_platform_cooling_register(const struct cpumask *clip_cpus,
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struct cpu_cooling_ops *ops);
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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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* @policy: cpufreq policy.
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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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struct cpufreq_policy *policy);
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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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struct cpufreq_policy *policy,
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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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struct cpufreq_policy *policy)
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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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struct cpufreq_policy *policy,
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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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extern void cpu_cooling_max_level_notifier_register(struct notifier_block *n);
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extern void cpu_cooling_max_level_notifier_unregister(struct notifier_block *n);
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extern const struct cpumask *cpu_cooling_get_max_level_cpumask(void);
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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(struct cpufreq_policy *policy)
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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(struct cpufreq_policy *policy,
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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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struct cpufreq_policy *policy)
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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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struct cpufreq_policy *policy,
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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 struct thermal_cooling_device *
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cpufreq_platform_cooling_register(const struct cpumask *clip_cpus,
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struct cpu_cooling_ops *ops)
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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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void cpu_cooling_max_level_notifier_register(struct notifier_block *n)
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{
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}
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static inline
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void cpu_cooling_max_level_notifier_unregister(struct notifier_block *n)
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{
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}
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static inline const struct cpumask *cpu_cooling_get_max_level_cpumask(void)
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{
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return cpu_none_mask;
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}
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#endif /* CONFIG_CPU_THERMAL */
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#endif /* __CPU_COOLING_H__ */
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