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-rw-r--r--kernel/include/linux/cpu_cooling.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/kernel/include/linux/cpu_cooling.h b/kernel/include/linux/cpu_cooling.h
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+++ b/kernel/include/linux/cpu_cooling.h
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+/*
+ * linux/include/linux/cpu_cooling.h
+ *
+ * Copyright (C) 2012 Samsung Electronics Co., Ltd(http://www.samsung.com)
+ * Copyright (C) 2012 Amit Daniel <amit.kachhap@linaro.org>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#ifndef __CPU_COOLING_H__
+#define __CPU_COOLING_H__
+
+#include <linux/of.h>
+#include <linux/thermal.h>
+#include <linux/cpumask.h>
+
+#ifdef CONFIG_CPU_THERMAL
+/**
+ * cpufreq_cooling_register - function to create cpufreq cooling device.
+ * @clip_cpus: cpumask of cpus where the frequency constraints will happen
+ */
+struct thermal_cooling_device *
+cpufreq_cooling_register(const struct cpumask *clip_cpus);
+
+/**
+ * of_cpufreq_cooling_register - create cpufreq cooling device based on DT.
+ * @np: a valid struct device_node to the cooling device device tree node.
+ * @clip_cpus: cpumask of cpus where the frequency constraints will happen
+ */
+#ifdef CONFIG_THERMAL_OF
+struct thermal_cooling_device *
+of_cpufreq_cooling_register(struct device_node *np,
+ const struct cpumask *clip_cpus);
+#else
+static inline struct thermal_cooling_device *
+of_cpufreq_cooling_register(struct device_node *np,
+ const struct cpumask *clip_cpus)
+{
+ return ERR_PTR(-ENOSYS);
+}
+#endif
+
+/**
+ * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
+ * @cdev: thermal cooling device pointer.
+ */
+void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
+
+unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq);
+#else /* !CONFIG_CPU_THERMAL */
+static inline struct thermal_cooling_device *
+cpufreq_cooling_register(const struct cpumask *clip_cpus)
+{
+ return ERR_PTR(-ENOSYS);
+}
+static inline struct thermal_cooling_device *
+of_cpufreq_cooling_register(struct device_node *np,
+ const struct cpumask *clip_cpus)
+{
+ return ERR_PTR(-ENOSYS);
+}
+static inline
+void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
+{
+ return;
+}
+static inline
+unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq)
+{
+ return THERMAL_CSTATE_INVALID;
+}
+#endif /* CONFIG_CPU_THERMAL */
+
+#endif /* __CPU_COOLING_H__ */