thermal/1.0/IThermal.hal

/*
 * 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.thermal@1.0;

interface IThermal {

    /**
     * Retrieves temperatures in Celsius.
     *
     * @return status Status of the operation. If status code is FAILURE,
     *         the status.debugMessage must be populated with the human-readable
     *         error message.
     * @return temperatures If status code is SUCCESS, it's filled with the
     *         current temperatures. The order of temperatures of built-in
     *         devices (such as CPUs, GPUs and etc.) in the list must be 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.
     *
     */
    @callflow(next={"*"})
    @entry
    @exit
    getTemperatures()
        generates (ThermalStatus status, vec<Temperature> temperatures);

    /**
     * Retrieves CPU usage information of each core: active and total times
     * in ms since first boot.
     *
     * @return status Status of the operation. If status code is FAILURE,
     *         the status.debugMessage must be populated with the human-readable
     *         error message.
     * @return cpuUsages If status code is SUCCESS, it's filled with the current
     *         CPU usages. The order and number of CPUs in the list must be kept
     *         the same regardless the number of calls to this method.
     *
     */
    @callflow(next={"*"})
    @entry
    @exit
    getCpuUsages() generates (ThermalStatus status, vec<CpuUsage> cpuUsages);

    /**
     * Retrieves the cooling devices information.
     *
     * @return status Status of the operation. If status code is FAILURE,
     *         the status.debugMessage must be populated with the human-readable
     *         error message.
     * @return devices If status code is SUCCESS, it's filled with the current
     *         cooling device information. The order of built-in cooling
     *         devices in the list must be 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 cooling devices.
     *
     */
    @callflow(next={"*"})
    @entry
    @exit
    getCoolingDevices()
        generates (ThermalStatus status, vec<CoolingDevice> devices);

};