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WDF_DEVICE_POWER_CAPABILITIES_INIT function (wdfdevice.h)

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[Applies to KMDF and UMDF]

The WDF_DEVICE_POWER_CAPABILITIES_INIT function initializes a WDF_DEVICE_POWER_CAPABILITIES structure.

Syntax

void WDF_DEVICE_POWER_CAPABILITIES_INIT(
  [out] PWDF_DEVICE_POWER_CAPABILITIES Caps
);

Parameters

[out] Caps

A pointer to a driver-supplied WDF_DEVICE_POWER_CAPABILITIES structure.

Return value

None

Remarks

The WDF_DEVICE_POWER_CAPABILITIES_INIT function zeros the WDF_DEVICE_POWER_CAPABILITIES structure and sets the structure's Size member. Then, it does the following:

  • Sets the DeviceD1 and DeviceD2 members to WdfUseDefault.
  • Sets the WakeFromD0, WakeFromD1, WakeFromD2, and WakeFromD3 members to WdfUseDefault.
  • Sets all device states in the DeviceState array to PowerDeviceMaximum.
  • Sets the DeviceWake and SystemWake members to PowerDeviceMaximum.
  • Sets the D1Latency, D2Latency, and D3Latency members to -1.
  • Sets the IdealDxStateForSx member to PowerDeviceMaximum.
For a code example that uses WDF_DEVICE_POWER_CAPABILITIES_INIT, see WdfDeviceSetPowerCapabilities.

Requirements

Requirement Value
Target Platform Universal
Minimum KMDF version 1.0
Minimum UMDF version 2.0
Header wdfdevice.h (include Wdf.h)

See also

WDF_DEVICE_POWER_CAPABILITIES