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