drivers/of/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 config DTC
   3         bool
   4
   5 menuconfig OF
   6         bool "Device Tree and Open Firmware support"
   7         help
   8           This option enables the device tree infrastructure.
   9           It is automatically selected by platforms that need it or can
  10           be enabled manually for unittests, overlays or
  11           compile-coverage.
  12
  13 if OF
  14
  15 config OF_UNITTEST
  16         bool "Device Tree runtime unit tests"
  17         depends on !SPARC
  18         select IRQ_DOMAIN
  19         select OF_EARLY_FLATTREE
  20         select OF_RESOLVE
  21         help
  22           This option builds in test cases for the device tree infrastructure
  23           that are executed once at boot time, and the results dumped to the
  24           console.
  25
  26           If unsure, say N here, but this option is safe to enable.
  27
  28 config OF_ALL_DTBS
  29         bool "Build all Device Tree Blobs"
  30         depends on COMPILE_TEST
  31         select DTC
  32         help
  33           This option builds all possible Device Tree Blobs (DTBs) for the
  34           current architecture.
  35
  36           If unsure, say N here, but this option is safe to enable.
  37
  38 config OF_FLATTREE
  39         bool
  40         select DTC
  41         select LIBFDT
  42         select CRC32
  43
  44 config OF_EARLY_FLATTREE
  45         bool
  46         select DMA_DECLARE_COHERENT if HAS_DMA
  47         select OF_FLATTREE
  48
  49 config OF_PROMTREE
  50         bool
  51
  52 config OF_KOBJ
  53         def_bool SYSFS
  54
  55 # Hardly any platforms need this.  It is safe to select, but only do so if you
  56 # need it.
  57 config OF_DYNAMIC
  58         bool "Support for dynamic device trees" if OF_UNITTEST
  59         select OF_KOBJ
  60         help
  61           On some platforms, the device tree can be manipulated at runtime.
  62           While this option is selected automatically on such platforms, you
  63           can enable it manually to improve device tree unit test coverage.
  64
  65 config OF_ADDRESS
  66         def_bool y
  67         depends on !SPARC && (HAS_IOMEM || UML)
  68
  69 config OF_IRQ
  70         def_bool y
  71         depends on !SPARC && IRQ_DOMAIN
  72
  73 config OF_NET
  74         depends on NETDEVICES
  75         def_bool y
  76
  77 config OF_RESERVED_MEM
  78         def_bool OF_EARLY_FLATTREE
  79
  80 config OF_RESOLVE
  81         bool
  82
  83 config OF_OVERLAY
  84         bool "Device Tree overlays"
  85         select OF_DYNAMIC
  86         select OF_FLATTREE
  87         select OF_RESOLVE
  88         help
  89           Overlays are a method to dynamically modify part of the kernel's
  90           device tree with dynamically loaded data.
  91           While this option is selected automatically when needed, you can
  92           enable it manually to improve device tree unit test coverage.
  93
  94 config OF_NUMA
  95         bool
  96
  97 config OF_DMA_DEFAULT_COHERENT
  98         # arches should select this if DMA is coherent by default for OF devices
  99         bool
 100
 101 endif # OF