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https://github.com/SerenityOS/serenity
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21a21c6a11
This makes it easier to work with device tree nodes and properties, then writing simple state machines to parse the device tree. This also makes the old slow traversal methods use the DeviceTreeProperty helper class, and adds a simple test.
30 lines
957 B
C++
30 lines
957 B
C++
/*
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* Copyright (c) 2024, Leon Albrecht <leon.a@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibTest/TestCase.h>
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#include <LibCore/File.h>
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#include <LibCore/System.h>
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#include <LibDeviceTree/DeviceTree.h>
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#include <LibDeviceTree/FlattenedDeviceTree.h>
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TEST_CASE(basic_functionality)
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{
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auto fdt_file = TRY_OR_FAIL(Core::File::open("/usr/Tests/LibDeviceTree/dtb.dtb"sv, Core::File::OpenMode::Read));
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auto fdt = TRY_OR_FAIL(fdt_file->read_until_eof());
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auto device_tree = TRY_OR_FAIL(DeviceTree::DeviceTree::parse(fdt));
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auto boot_args = device_tree->resolve_property("/chosen/bootargs"sv);
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EXPECT(boot_args.has_value());
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EXPECT_EQ(boot_args->as_string(), "hello root=nvme0:1:0 serial_debug"sv);
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EXPECT(device_tree->phandle(1));
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auto device_type = device_tree->phandle(1)->get_property("device_type"sv);
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EXPECT(device_type.has_value());
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EXPECT_EQ(device_type->as_string(), "cpu"sv);
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}
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