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
IOCTL_POWER_CAPABILITIES	Requests that the device inform Power Manager which power states it supports and what their characteristics are.
IOCTL_POWER_SET	Requests that the device update its device power state.
IOCTL_POWER_QUERY	Asks the device if it is ready to go into a new device power state.
IOCTL_POWER_GET	Requests 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