1# Power Management<a name="EN-US_TOPIC_0000001121107655"></a> 2 3- [Introduction](#section11660541593) 4- [Directory Structure](#section19472752217) 5- [Usage](#section19959125052315) 6- [Repositories Involved](#section63151229062) 7 8## Introduction<a name="section11660541593"></a> 9 10The power management subsystem provides the following functionalities: 11 121. Rebooting the device 132. Managing running locks 143. Querying the power status 154. Obtaining and reporting the charging and battery status 165. Turning on/off the device screen and adjusting the screen brightness 17 18**Figure 1** Power management subsystem architecture<a name="fig7607759319"></a> 19 20 21 22 23## Directory Structure<a name="section19472752217"></a> 24 25``` 26/base/powermgr 27├── battery_manager # Battery manager 28│ ├── hdi # Hardware Driver Interfaces (HDIs) 29│ ├── interfaces # APIs 30│ ├── sa_profile # SA profile 31│ ├── services # Services 32│ └── utils # Utilities 33├── display_manager # Display manager 34│ ├── interfaces # APIs 35│ └── sa_profile # SA profile 36│ └── services # Services 37│ └── utils # Utilities 38├── powermgr_lite # Lite power manager 39│ ├── interfaces # APIs 40│ └── services # Services 41└── power_manager # Power manager 42 ├── interfaces # APIs 43 ├── sa_profile # SA profile 44 └── services # Services 45 └── utils # Utilities 46``` 47 48## Usage<a name="section19959125052315"></a> 49 50You can use the APIs provided by the power management subsystem to create and release a running lock, obtain battery information, adjust the screen brightness, reboot a device, and power off a device. 51 52## Repositories Involved<a name="section63151229062"></a> 53 54**Power Management subsystem** 55 56powermgr\_battery\_manager 57 58powermgr\_power\_manager 59 60powermgr\_display\_manager 61 62
