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LibDeviceTree: Add a simple DeviceTree class

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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.
This commit is contained in:
Hediadyoin1 2024-02-14 14:57:17 +01:00 • committed by Andrew Kaster
parent 0fa718ead8
commit 21a21c6a11
10 changed files with 316 additions and 31 deletions
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9
Userland/Utilities/fdtdump.cpp
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@ -35,14 +35,13 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
TRY(DeviceTree::dump(*fdt_header, bytes));
auto compatible = TRY(DeviceTree::slow_get_property<StringView>("/compatible"sv, *fdt_header, bytes));
auto compatible_strings = compatible.split_view('\0');
dbgln("compatible with: {}", compatible_strings);
auto compatible = TRY(DeviceTree::slow_get_property("/compatible"sv, *fdt_header, bytes)).as_strings();
dbgln("compatible with: {}", compatible);
auto bootargs = TRY(DeviceTree::slow_get_property<StringView>("/chosen/bootargs"sv, *fdt_header, bytes));
auto bootargs = TRY(DeviceTree::slow_get_property("/chosen/bootargs"sv, *fdt_header, bytes)).as_string();
dbgln("bootargs: {}", bootargs);
auto cpu_compatible = TRY(DeviceTree::slow_get_property<StringView>("/cpus/cpu@0/compatible"sv, *fdt_header, bytes));
auto cpu_compatible = TRY(DeviceTree::slow_get_property("/cpus/cpu@0/compatible"sv, *fdt_header, bytes)).as_string();
dbgln("cpu0 compatible: {}", cpu_compatible);
return 0;