89 lines
3.6 KiB
Text
89 lines
3.6 KiB
Text
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.hardware.power@1.0;
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/**
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* Constructor for the interface performs power management setup actions at
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* runtime startup, such as to set default cpufreq parameters.
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*/
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interface IPower {
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/**
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* setInteractive() performs power management actions upon the
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* system entering interactive state (that is, the system is awake
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* and ready for interaction, often with UI devices such as
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* display and touchscreen enabled) or non-interactive state (the
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* system appears asleep, display usually turned off). The
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* non-interactive state may be entered after a period of
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* inactivity in order to conserve battery power during
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* such inactive periods.
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*
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* Typical actions are to turn on or off devices and adjust
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* cpufreq parameters. This function may also call the
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* appropriate interfaces to allow the kernel to suspend the
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* system to low-power sleep state when entering non-interactive
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* state, and to disallow low-power suspend when the system is in
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* interactive state. When low-power suspend state is allowed, the
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* kernel may suspend the system whenever no wakelocks are held.
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*
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* For example,
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* This function can be called to enter non-interactive state after
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* turning off the screen (if present) and called to enter
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* interactive state prior to turning on the screen.
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*
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* @param interactive is true when the system is transitioning to an
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* interactive state and false when transitioning to a
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* non-interactive state.
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*/
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setInteractive(bool interactive);
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/**
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* powerHint() is called to pass hints on power requirements which
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* may result in adjustment of power/performance parameters of the
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* cpufreq governor and other controls.
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*
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* A particular platform may choose to ignore any hint.
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*
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* @param hint PowerHint which is passed
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* @param data contains additional information about the hint
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* and is described along with the comments for each of the hints.
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*/
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powerHint(PowerHint hint, int32_t data);
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/**
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* setFeature() is called to turn on or off a particular feature
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* depending on the state parameter.
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*
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* @param feature Feature which needs to be set
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* @param activate true/false to enable/disable the feature
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*/
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setFeature(Feature feature, bool activate);
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/**
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* Platform-level sleep state stats:
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* Report cumulative info on the statistics on platform-level sleep states
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* since boot.
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*
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* Higher the index in the returned <states> vector deeper the state is
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* i.e. lesser steady-state power is consumed by the platform to be
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* resident in that state.
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*
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* @return states of power states the device supports
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* @return retval SUCCESS on success or FILESYSTEM_ERROR on filesystem
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* nodes access error.
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*/
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getPlatformLowPowerStats()
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generates (vec<PowerStatePlatformSleepState> states, Status retval);
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};
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