# SPDX-License-Identifier: GPL-2.0

  config DTC
  	bool

  menuconfig OF
  	bool "Device Tree and Open Firmware support"
  	help
  	  This option enables the device tree infrastructure.
  	  It is automatically selected by platforms that need it or can
  	  be enabled manually for unittests, overlays or
  	  compile-coverage.

  if OF

  config OF_UNITTEST
  	bool "Device Tree runtime unit tests"

  	depends on !SPARC
  	select IRQ_DOMAIN

  	select OF_EARLY_FLATTREE

  	select OF_RESOLVE

  	help
  	  This option builds in test cases for the device tree infrastructure

  	  that are executed once at boot time, and the results dumped to the

  	  console.
  
  	  If unsure, say N here, but this option is safe to enable.

  config OF_ALL_DTBS
  	bool "Build all Device Tree Blobs"
  	depends on COMPILE_TEST
  	select DTC
  	help
  	  This option builds all possible Device Tree Blobs (DTBs) for the
  	  current architecture.
  
  	  If unsure, say N here, but this option is safe to enable.

  config OF_FLATTREE
  	bool

  	select DTC

  	select LIBFDT

  	select CRC32

  config OF_EARLY_FLATTREE
  	bool

  	select DMA_DECLARE_COHERENT if HAS_DMA

  	select OF_FLATTREE

  config OF_PROMTREE
  	bool

  config OF_KOBJ
  	def_bool SYSFS

  # Hardly any platforms need this.  It is safe to select, but only do so if you
  # need it.

  config OF_DYNAMIC

  	bool "Support for dynamic device trees" if OF_UNITTEST

  	select OF_KOBJ

  	help
  	  On some platforms, the device tree can be manipulated at runtime.
  	  While this option is selected automatically on such platforms, you
  	  can enable it manually to improve device tree unit test coverage.

  config OF_ADDRESS
  	def_bool y

  	depends on !SPARC && (HAS_IOMEM || UML)

  config OF_IRQ
  	def_bool y

  	depends on !SPARC && IRQ_DOMAIN

  config OF_NET
  	depends on NETDEVICES
  	def_bool y

  config OF_RESERVED_MEM

  	bool

  	depends on OF_EARLY_FLATTREE

  	default y if DMA_DECLARE_COHERENT || DMA_CMA

  config OF_RESOLVE
  	bool

  config OF_OVERLAY

  	bool "Device Tree overlays"

  	select OF_DYNAMIC

  	select OF_FLATTREE

  	select OF_RESOLVE

  	help
  	  Overlays are a method to dynamically modify part of the kernel's
  	  device tree with dynamically loaded data.
  	  While this option is selected automatically when needed, you can
  	  enable it manually to improve device tree unit test coverage.

  config OF_NUMA
  	bool

  config OF_DMA_DEFAULT_COHERENT
  	# arches should select this if DMA is coherent by default for OF devices
  	bool

  endif # OF