37 lines
1.1 KiB
Nix
37 lines
1.1 KiB
Nix
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{ lib, stdenv, stdenvNoCC, dtc, writers, python3 }:
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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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name,
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dtsFile,
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includePaths ? [],
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extraPreprocessorFlags ? []
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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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applyOverlays = (base: overlays': 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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