PO_FX_COMPONENT_V1 structure PO_FX_COMPONENT_V2 structure PO_FX_DEVICE_POWER_NOT_REQUIRED_CALLBACK callback function PO_FX_DEVICE_POWER_REQUIRED_CALLBACK callback function PO_FX_DEVICE_V1 structure PO_FX_DEVICE_V2 structure PO_FX_DEVICE_V3 structure PO_FX_DIRECTED_POWER_DOWN_CALLBACK callb...