Device Drivers ACPI Support

acpi_bus_scan — Add ACPI device node objects in a given namespace scope.
acpi_bus_trim — Detach scan handlers and drivers from ACPI device objects.
acpi_scan_drop_device — Drop an ACPI device object.
acpi_dma_supported — Check DMA support for the specified device.
acpi_get_dma_attr — Check the supported DMA attr for the specified device.