Device Control IOCTLs
The Power Manager uses the following IOCTL codes to communicate with a device.
| IOCTL | Description |
|---|---|
| IOCTL_POWER_CAPABILITIES | Request that the device inform Power Manager which power states it supports and what their characteristics are. |
| IOCTL_POWER_SET | Request that the device update its device power state. |
| IOCTL_POWER_QUERY | Ask the device if it is ready to go into a new device power state. |
| IOCTL_POWER_GET | Request that the device inform Power Manager of its current device power state. |
| IOCTL_REGISTER_POWER_RELATIONSHIP | Notifies the parent device to register all devices it controls. |
See Also
Last updated on Tuesday, May 18, 2004
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