1 files changed, 81 insertions, 0 deletions

diff --git a/include/linux/devfreq_cooling.h b/include/linux/devfreq_cooling.h
new file mode 100644
index 000000000000..7adf6cc4b305
--- /dev/null
+++ b/include/linux/devfreq_cooling.h
@@ -0,0 +1,81 @@
+/*
+ * devfreq_cooling: Thermal cooling device implementation for devices using
+ *                  devfreq
+ *
+ * Copyright (C) 2014-2015 ARM Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __DEVFREQ_COOLING_H__
+#define __DEVFREQ_COOLING_H__
+
+#include <linux/devfreq.h>
+#include <linux/thermal.h>
+
+#ifdef CONFIG_DEVFREQ_THERMAL
+
+/**
+ * struct devfreq_cooling_power - Devfreq cooling power ops
+ * @get_static_power:   Take voltage, in mV, and return the static power
+ *                      in mW.  If NULL, the static power is assumed
+ *                      to be 0.
+ * @get_dynamic_power:  Take voltage, in mV, and frequency, in HZ, and
+ *                      return the dynamic power draw in mW.  If NULL,
+ *                      a simple power model is used.
+ * @dyn_power_coeff:    Coefficient for the simple dynamic power model in
+ *                      mW/(MHz mV mV).
+ *                      If get_dynamic_power() is NULL, then the
+ *                      dynamic power is calculated as
+ *                      @dyn_power_coeff * frequency * voltage^2
+ */
+struct devfreq_cooling_power {
+        unsigned long (*get_static_power)(unsigned long voltage);
+        unsigned long (*get_dynamic_power)(unsigned long freq,
+                                           unsigned long voltage);
+        unsigned long dyn_power_coeff;
+};
+
+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);
+
+#else /* !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)
+{
+        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 void
+devfreq_cooling_unregister(struct thermal_cooling_device *dfc)
+{
+}
+
+#endif /* CONFIG_DEVFREQ_THERMAL */
+#endif /* __DEVFREQ_COOLING_H__ */