diff --git a/include/hardware/thermal.h b/include/hardware/thermal.h
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--- /dev/null
+++ b/include/hardware/thermal.h
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+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_INCLUDE_HARDWARE_THERMAL_H
+#define ANDROID_INCLUDE_HARDWARE_THERMAL_H
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#include <hardware/hardware.h>
+
+__BEGIN_DECLS
+
+#define THERMAL_HARDWARE_MODULE_API_VERSION_0_1 HARDWARE_MODULE_API_VERSION(0, 1)
+
+#define THERMAL_HARDWARE_MODULE_ID "thermal"
+
+// This value is returned if a desired temperature is not available.
+#define UNKNOWN_TEMPERATURE -FLT_MAX
+
+/** Device temperature types. Must be kept in sync with
+ * framework/base/core/java/android/os/HardwarePropertiesManager.java
+ */
+enum temperature_type {
+    DEVICE_TEMPERATURE_UNKNOWN  = -1,
+    DEVICE_TEMPERATURE_CPU      = 0,
+    DEVICE_TEMPERATURE_GPU      = 1,
+    DEVICE_TEMPERATURE_BATTERY  = 2,
+    DEVICE_TEMPERATURE_SKIN     = 3
+};
+
+enum cooling_type {
+    /** Fan cooling device speed in RPM. */
+    FAN_RPM                     = 0,
+};
+
+typedef struct {
+  /**
+   * This temperature's type.
+   */
+  enum temperature_type type;
+
+  /**
+   * Name of this temperature.
+   * All temperatures of the same "type" must have a different "name".
+   */
+  const char *name;
+
+  /**
+   * Current temperature in Celsius. If not available set by HAL to
+   * UNKNOWN_TEMPERATURE.
+   * Current temperature can be in any units if
+   * type=DEVICE_TEMPERATURE_UNKNOWN.
+   */
+  float current_value;
+
+  /**
+   * Throttling temperature constant for this temperature.
+   * If not available, set by HAL to UNKNOWN_TEMPERATURE.
+   */
+  float throttling_threshold;
+
+  /**
+   * Shutdown temperature constant for this temperature.
+   * If not available, set by HAL to UNKNOWN_TEMPERATURE.
+   */
+  float shutdown_threshold;
+} temperature_t;
+
+typedef struct {
+    /**
+     * This cooling device type.
+     */
+    enum cooling_type type;
+
+    /**
+     * Name of this cooling device.
+     * All cooling devices of the same "type" must have a different "name".
+     */
+    const char *name;
+
+    /**
+     * Current cooling device value. Units depend on cooling device "type".
+     */
+    float current_value;
+} cooling_device_t;
+
+typedef struct {
+    /**
+     * Name of this CPU.
+     * All CPUs must have a different "name".
+     */
+    const char *name;
+
+    /**
+     * Active time since the last boot in ms.
+     */
+    uint64_t active;
+
+    /**
+     * Total time since the last boot in ms.
+     */
+    uint64_t total;
+
+    /**
+     * Is set to true when a core is online.
+     * If the core is offline, all other members except |name| should be ignored.
+     */
+    bool is_online;
+} cpu_usage_t;
+
+typedef struct thermal_module {
+    struct hw_module_t common;
+
+    /*
+     * (*getTemperatures) is called to get temperatures in Celsius.
+     *
+     * @param list If NULL, this method only returns number of temperatures
+     *     and caller should allocate a temperature_t array with that number
+     *     of elements.
+     *     Caller is responsible for allocating temperature_t array |list| of
+     *     large enough size (not less than returned number of temperatures).
+     *     If |list| is not NULL and this method returns non-negative value,
+     *     it's filled with the current temperatures. If the resulting
+     *     temperature list is longer than |size| elements, the remaining
+     *     temperatures are discarded and not stored, but counted for the value
+     *     returned by this method.
+     *     The order of temperatures of built-in devices (such as CPUs, GPUs and
+     *     etc.) in the |list| is kept the same regardless the number of calls
+     *     to this method even if they go offline, if these devices exist on
+     *     boot. The method always returns and never removes such temperatures.
+     * @param size The capacity of |list|, in elements, if |list| is not NULL.
+     *
+     * @return number of temperatures or negative value -errno on error.
+     *
+     */
+    ssize_t (*getTemperatures)(struct thermal_module *module, temperature_t *list, size_t size);
+
+    /*
+     * (*getCpuUsages) is called to get CPU usage information of each core:
+     *     active and total times in ms since first boot.
+     *
+     * @param list If NULL, this method only returns number of cores and caller
+     *     should allocate a cpu_usage_t array with that number of elements.
+     *     Caller is responsible for allocating cpu_usage_t array |list| of
+     *     large enough size (not less than returned number of CPUs).
+     *     If |list| is not NULL and this method returns non-negative value,
+     *     it's filled with the current CPU usages.
+     *     The order of CPUs in the |list| is kept the same regardless the
+     *     number of calls to this method.
+     *
+     * @return constant number of CPUs or negative value -errno on error.
+     *
+     */
+    ssize_t (*getCpuUsages)(struct thermal_module *module, cpu_usage_t *list);
+
+    /*
+     * (*getCoolingDevices) is called to get the cooling devices information.
+     *
+     * @param list If NULL, this method only returns number of cooling devices
+     *     and caller should allocate a cooling_device_t array with that number
+     *     of elements.
+     *     Caller is responsible for allocating cooling_device_t array |list| of
+     *     large enough size (not less than returned number of cooling devices).
+     *     If |list| is not NULL and this method returns non-negative value,
+     *     it's filled with the current cooling device information. If the
+     *     resulting cooling device list is longer than |size| elements, the
+     *     remaining cooling device informations are discarded and not stored,
+     *     but counted for the value returned by this method.
+     *     The order of built-in coolling devices in the |list| is kept the same
+     *     regardless the number of calls to this method even if they go
+     *     offline, if these devices exist on boot. The method always returns
+     *     and never removes from the list such coolling devices.
+     * @param size The capacity of |list|, in elements, if |list| is not NULL.
+     *
+     * @return number of cooling devices or negative value -errno on error.
+     *
+     */
+    ssize_t (*getCoolingDevices)(struct thermal_module *module, cooling_device_t *list,
+                                 size_t size);
+} thermal_module_t;
+
+__END_DECLS
+
+#endif  // ANDROID_INCLUDE_HARDWARE_THERMAL_H