1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _LIBSUSPEND_AUTOSUSPEND_H_ 18 #define _LIBSUSPEND_AUTOSUSPEND_H_ 19 20 #include <sys/cdefs.h> 21 #include <stdbool.h> 22 23 __BEGIN_DECLS 24 25 /* 26 * autosuspend_enable 27 * 28 * Turn on autosuspend in the kernel, allowing it to enter suspend if no 29 * wakelocks/wakeup_sources are held. 30 * 31 * 32 * 33 * Returns 0 on success, -1 if autosuspend was not enabled. 34 */ 35 int autosuspend_enable(void); 36 37 /* 38 * autosuspend_disable 39 * 40 * Turn off autosuspend in the kernel, preventing suspend and synchronizing 41 * with any in-progress resume. 42 * 43 * Returns 0 on success, -1 if autosuspend was not disabled. 44 */ 45 int autosuspend_disable(void); 46 47 /* 48 * force_suspend 49 * 50 * Forces suspend to happen. timeout_ms is used to give system a chance to suspend gracefully. 51 * When timeout expires, suspend will be forced via mem --> /sys/power/state. timeout_ms of 0 52 * will force suspend immediately. 53 * 54 * Returns 0 if system suspended, -1 if suspend did not occur. 55 */ 56 int autosuspend_force_suspend(int timeout_ms); 57 58 /* 59 * set_wakeup_callback 60 * 61 * Set a function to be called each time the device returns from suspend. 62 * success is true if the suspend was sucessful and false if the suspend 63 * aborted due to some reason. 64 */ 65 void autosuspend_set_wakeup_callback(void (*func)(bool success)); 66 67 __END_DECLS 68 69 #endif 70