2023-08-30 17:31:07 +02:00
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# SPDX-License-Identifier: GPL-2.0
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config DTC
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bool
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menuconfig OF
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bool "Device Tree and Open Firmware support"
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help
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This option enables the device tree infrastructure.
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It is automatically selected by platforms that need it or can
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be enabled manually for unittests, overlays or
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compile-coverage.
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if OF
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config OF_UNITTEST
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bool "Device Tree runtime unit tests"
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depends on !SPARC
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select IRQ_DOMAIN
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select OF_EARLY_FLATTREE
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select OF_RESOLVE
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help
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This option builds in test cases for the device tree infrastructure
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that are executed once at boot time, and the results dumped to the
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console.
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This option should only be enabled for a development kernel. The tests
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will taint the kernel with TAINT_TEST. The tests will cause ERROR and
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WARNING messages to print on the console. The tests will cause stack
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traces to print on the console. It is possible that the tests will
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leave the devicetree in a corrupted state.
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The unittest output will be verbose. Copy the output to a file
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via capturing the console output or via the dmesg command. Process
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this file with scripts/dtc/of_unittest_expect to reduce the
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verbosity, test whether expected output is present, and to
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summarize the results.
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If unsure, say N here. This option is not safe to enable.
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config OF_ALL_DTBS
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bool "Build all Device Tree Blobs"
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depends on COMPILE_TEST
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select DTC
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help
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This option builds all possible Device Tree Blobs (DTBs) for the
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current architecture.
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If unsure, say N here, but this option is safe to enable.
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config OF_FLATTREE
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bool
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select DTC
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select LIBFDT
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select CRC32
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config OF_EARLY_FLATTREE
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bool
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2023-10-24 12:59:35 +02:00
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select DMA_DECLARE_COHERENT if HAS_DMA && HAS_IOMEM
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2023-08-30 17:31:07 +02:00
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select OF_FLATTREE
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config OF_PROMTREE
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bool
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config OF_KOBJ
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def_bool SYSFS
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# Hardly any platforms need this. It is safe to select, but only do so if you
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# need it.
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config OF_DYNAMIC
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bool "Support for dynamic device trees" if OF_UNITTEST
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select OF_KOBJ
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help
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On some platforms, the device tree can be manipulated at runtime.
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While this option is selected automatically on such platforms, you
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can enable it manually to improve device tree unit test coverage.
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config OF_ADDRESS
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def_bool y
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depends on !SPARC && (HAS_IOMEM || UML)
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config OF_IRQ
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def_bool y
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depends on !SPARC && IRQ_DOMAIN
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config OF_RESERVED_MEM
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def_bool OF_EARLY_FLATTREE
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config OF_RESOLVE
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bool
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config OF_OVERLAY
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bool "Device Tree overlays"
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select OF_DYNAMIC
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select OF_FLATTREE
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select OF_RESOLVE
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help
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Overlays are a method to dynamically modify part of the kernel's
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device tree with dynamically loaded data.
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While this option is selected automatically when needed, you can
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enable it manually to improve device tree unit test coverage.
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config OF_NUMA
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bool
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endif # OF
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