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-rw-r--r--include/linux/devfreq_cooling.h81
-rw-r--r--include/linux/thermal.h8
-rw-r--r--include/trace/events/thermal.h53
3 files changed, 139 insertions, 3 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__ */
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 157d366e761b..4014a59828fc 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -44,9 +44,11 @@
#define THERMAL_WEIGHT_DEFAULT 0
/* Unit conversion macros */
-#define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \
- ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
-#define CELSIUS_TO_KELVIN(t) ((t)*10+2732)
+#define DECI_KELVIN_TO_CELSIUS(t) ({ \
+ long _t = (t); \
+ ((_t-2732 >= 0) ? (_t-2732+5)/10 : (_t-2732-5)/10); \
+})
+#define CELSIUS_TO_DECI_KELVIN(t) ((t)*10+2732)
#define DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(t, off) (((t) - (off)) * 100)
#define DECI_KELVIN_TO_MILLICELSIUS(t) DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(t, 2732)
#define MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, off) (((t) / 100) + (off))
diff --git a/include/trace/events/thermal.h b/include/trace/events/thermal.h
index 8b1f80682b80..5738bb3e2343 100644
--- a/include/trace/events/thermal.h
+++ b/include/trace/events/thermal.h
@@ -4,6 +4,7 @@
#if !defined(_TRACE_THERMAL_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_THERMAL_H
+#include <linux/devfreq.h>
#include <linux/thermal.h>
#include <linux/tracepoint.h>
@@ -135,6 +136,58 @@ TRACE_EVENT(thermal_power_cpu_limit,
__entry->power)
);
+TRACE_EVENT(thermal_power_devfreq_get_power,
+ TP_PROTO(struct thermal_cooling_device *cdev,
+ struct devfreq_dev_status *status, unsigned long freq,
+ u32 dynamic_power, u32 static_power),
+
+ TP_ARGS(cdev, status, freq, dynamic_power, static_power),
+
+ TP_STRUCT__entry(
+ __string(type, cdev->type )
+ __field(unsigned long, freq )
+ __field(u32, load )
+ __field(u32, dynamic_power )
+ __field(u32, static_power )
+ ),
+
+ TP_fast_assign(
+ __assign_str(type, cdev->type);
+ __entry->freq = freq;
+ __entry->load = (100 * status->busy_time) / status->total_time;
+ __entry->dynamic_power = dynamic_power;
+ __entry->static_power = static_power;
+ ),
+
+ TP_printk("type=%s freq=%lu load=%u dynamic_power=%u static_power=%u",
+ __get_str(type), __entry->freq,
+ __entry->load, __entry->dynamic_power, __entry->static_power)
+);
+
+TRACE_EVENT(thermal_power_devfreq_limit,
+ TP_PROTO(struct thermal_cooling_device *cdev, unsigned long freq,
+ unsigned long cdev_state, u32 power),
+
+ TP_ARGS(cdev, freq, cdev_state, power),
+
+ TP_STRUCT__entry(
+ __string(type, cdev->type)
+ __field(unsigned int, freq )
+ __field(unsigned long, cdev_state)
+ __field(u32, power )
+ ),
+
+ TP_fast_assign(
+ __assign_str(type, cdev->type);
+ __entry->freq = freq;
+ __entry->cdev_state = cdev_state;
+ __entry->power = power;
+ ),
+
+ TP_printk("type=%s freq=%u cdev_state=%lu power=%u",
+ __get_str(type), __entry->freq, __entry->cdev_state,
+ __entry->power)
+);
#endif /* _TRACE_THERMAL_H */
/* This part must be outside protection */