diff --git a/power/1.0/IPower.hal b/power/1.0/IPower.hal
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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.
+ */
+package android.hardware.power@1.0;
+
+/*
+ * Constructor for the interface performs power management setup actions at
+ * runtime startup, such as to set default cpufreq parameters.
+ */
+interface IPower {
+    /*
+     * setInteractive() performs power management actions upon the
+     * system entering interactive state (that is, the system is awake
+     * and ready for interaction, often with UI devices such as
+     * display and touchscreen enabled) or non-interactive state (the
+     * system appears asleep, display usually turned off). The
+     * non-interactive state may be entered after a period of
+     * inactivity in order to conserve battery power during
+     * such inactive periods.
+     *
+     * Typical actions are to turn on or off devices and adjust
+     * cpufreq parameters. This function may also call the
+     * appropriate interfaces to allow the kernel to suspend the
+     * system to low-power sleep state when entering non-interactive
+     * state, and to disallow low-power suspend when the system is in
+     * interactive state. When low-power suspend state is allowed, the
+     * kernel may suspend the system whenever no wakelocks are held.
+     *
+     * For example,
+     * This function can be called to enter non-interactive state after
+     * turning off the screen (if present) and called to enter
+     * interactive state prior to turning on the screen.
+     *
+     * @param interactive is true when the system is transitioning to an
+     * interactive state and false when transitioning to a
+     * non-interactive state.
+     */
+    setInteractive(bool interactive);
+
+    /*
+     * powerHint() is called to pass hints on power requirements which
+     * may result in adjustment of power/performance parameters of the
+     * cpufreq governor and other controls.
+     *
+     * A particular platform may choose to ignore any hint.
+     *
+     * @param hint PowerHint which is passed
+     * @param data contains additional information about the hint
+     * and is described along with the comments for each of the hints.
+     */
+    powerHint(PowerHint hint, int32_t data);
+
+    /*
+     * setFeature() is called to turn on or off a particular feature
+     * depending on the state parameter.
+     *
+     * @param feature Feature which needs to be set
+     * @param activate true/false to enable/disable the feature
+     */
+    setFeature(Feature feature, bool activate);
+
+    /*
+     * Platform-level sleep state stats:
+     * Report cumulative info on the statistics on platform-level sleep states
+     * since boot.
+     *
+     * Higher the index in the returned <states> vector deeper the state is
+     * i.e. lesser steady-state power is consumed by the platform to be
+     * resident in that state.
+     *
+     * @return states of power states the device supports
+     * @return retval SUCCESS on success or FILESYSTEM_ERROR on filesystem
+     * nodes access error.
+     */
+    getPlatformLowPowerStats()
+            generates (vec<PowerStatePlatformSleepState> states, Status retval);
+};