Device Control I/O Controls
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4/8/2010
Power Manager uses the following I/O controls to communicate with a device.
| IOCTL | Description |
|---|---|
Requests that the device inform Power Manager which power states it supports and what their characteristics are. |
|
Requests that the device update its device power state. |
|
Asks the device if it is ready to go into a new device power state. |
|
Requests that the device inform Power Manager of its current device power state. |
|
Notifies the parent device to register all devices it controls. |