646b892680
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50 lines
1.2 KiB
Nix
50 lines
1.2 KiB
Nix
{
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lib,
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stdenv,
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stdenvNoCC,
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dtc,
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writers,
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python3,
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}:
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{
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# Compile single Device Tree overlay source
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# file (.dts) into its compiled variant (.dtb)
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compileDTS = (
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{
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name,
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dtsFile,
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includePaths ? [ ],
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extraPreprocessorFlags ? [ ],
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}:
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stdenv.mkDerivation {
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inherit name;
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nativeBuildInputs = [ dtc ];
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buildCommand =
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let
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includeFlagsStr = lib.concatMapStringsSep " " (includePath: "-I${includePath}") includePaths;
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extraPreprocessorFlagsStr = lib.concatStringsSep " " extraPreprocessorFlags;
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in
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''
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$CC -E -nostdinc ${includeFlagsStr} -undef -D__DTS__ -x assembler-with-cpp ${extraPreprocessorFlagsStr} ${dtsFile} | \
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dtc -I dts -O dtb -@ -o $out
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'';
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}
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);
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applyOverlays = (
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base: overlays':
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stdenvNoCC.mkDerivation {
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name = "device-tree-overlays";
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nativeBuildInputs = [
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(python3.pythonOnBuildForHost.withPackages (ps: [ ps.libfdt ]))
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];
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buildCommand = ''
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python ${./apply_overlays.py} --source ${base} --destination $out --overlays ${writers.writeJSON "overlays.json" overlays'}
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'';
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}
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);
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}
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