1# SPDX-License-Identifier: GPL-2.0
2config DTC
3	bool
4
5menuconfig 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
13if OF
14
15config 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
28config 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
38config OF_FLATTREE
39	bool
40	select DTC
41	select LIBFDT
42	select CRC32
43
44config OF_EARLY_FLATTREE
45	bool
46	select OF_FLATTREE
47
48config OF_PROMTREE
49	bool
50
51config OF_KOBJ
52	def_bool SYSFS
53
54# Hardly any platforms need this.  It is safe to select, but only do so if you
55# need it.
56config OF_DYNAMIC
57	bool "Support for dynamic device trees" if OF_UNITTEST
58	select OF_KOBJ
59	help
60	  On some platforms, the device tree can be manipulated at runtime.
61	  While this option is selected automatically on such platforms, you
62	  can enable it manually to improve device tree unit test coverage.
63
64config OF_ADDRESS
65	def_bool y
66	depends on !SPARC && (HAS_IOMEM || UML)
67
68config OF_IRQ
69	def_bool y
70	depends on !SPARC && IRQ_DOMAIN
71
72config OF_NET
73	depends on NETDEVICES
74	def_bool y
75
76config OF_MDIO
77	def_tristate PHYLIB
78	depends on PHYLIB
79	select FIXED_PHY
80	help
81	  OpenFirmware MDIO bus (Ethernet PHY) accessors
82
83config OF_RESERVED_MEM
84	depends on OF_EARLY_FLATTREE
85	bool
86	help
87	  Helpers to allow for reservation of memory regions
88
89config OF_RESOLVE
90	bool
91
92config OF_OVERLAY
93	bool "Device Tree overlays"
94	select OF_DYNAMIC
95	select OF_FLATTREE
96	select OF_RESOLVE
97	help
98	  Overlays are a method to dynamically modify part of the kernel's
99	  device tree with dynamically loaded data.
100	  While this option is selected automatically when needed, you can
101	  enable it manually to improve device tree unit test coverage.
102
103config OF_NUMA
104	bool
105
106config OF_DMA_DEFAULT_COHERENT
107	# arches should select this if DMA is coherent by default for OF devices
108	bool
109
110endif # OF
111