Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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 DMA_DECLARE_COHERENT if HAS_DMA
47 select OF_FLATTREE
48
49config OF_PROMTREE
50 bool
51
52config 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.
57config 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
65config OF_ADDRESS
66 def_bool y
67 depends on !SPARC && (HAS_IOMEM || UML)
68
69config OF_IRQ
70 def_bool y
71 depends on !SPARC && IRQ_DOMAIN
72
73config OF_NET
74 depends on NETDEVICES
75 def_bool y
76
77config OF_RESERVED_MEM
78 bool
79 depends on OF_EARLY_FLATTREE
80 default y if DMA_DECLARE_COHERENT || DMA_CMA
81
82config OF_RESOLVE
83 bool
84
85config OF_OVERLAY
86 bool "Device Tree overlays"
87 select OF_DYNAMIC
88 select OF_FLATTREE
89 select OF_RESOLVE
90 help
91 Overlays are a method to dynamically modify part of the kernel's
92 device tree with dynamically loaded data.
93 While this option is selected automatically when needed, you can
94 enable it manually to improve device tree unit test coverage.
95
96config OF_NUMA
97 bool
98
99config OF_DMA_DEFAULT_COHERENT
100 # arches should select this if DMA is coherent by default for OF devices
101 bool
102
103endif # OF