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raspberry-pi/4: dtmerge update

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Co-authored-by: Jörg Thalheim <Mic92@users.noreply.github.com>
This commit is contained in:
Karolis Stasaitis 2022-12-17 12:33:45 +01:00
parent e462a4baf7
commit 93b1cdbb77
1 changed files with 35 additions and 15 deletions
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50
raspberry-pi/4/apply-overlays-dtmerge.nix
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@ -1,5 +1,5 @@
# modification of nixpkgs deviceTree.applyOverlays to resolve https://github.com/NixOS/nixpkgs/issues/125354
# https://github.com/NixOS/nixpkgs/blob/master/pkgs/os-specific/linux/device-tree/default.nix
# derived from https://github.com/NixOS/nixpkgs/blob/916ca8f2b0c208def051f8ea9760c534a40309db/pkgs/os-specific/linux/device-tree/default.nix
{ lib, pkgs, stdenvNoCC, dtc, libraspberrypi }:
with lib; (base: overlays': stdenvNoCC.mkDerivation {
@ -9,22 +9,42 @@ with lib; (base: overlays': stdenvNoCC.mkDerivation {
overlays = toList overlays';
in ''
mkdir -p $out
cd ${base}
cd "${base}"
find . -type f -name '*.dtb' -print0 \
| xargs -0 cp -v --no-preserve=mode --target-directory $out --parents
for dtb in $(find $out -type f -name '*.dtb'); do
dtbCompat="$( fdtget -t s $dtb / compatible )"
| xargs -0 cp -v --no-preserve=mode --target-directory "$out" --parents
for dtb in $(find "$out" -type f -name '*.dtb'); do
dtbCompat=$(fdtget -t s "$dtb" / compatible 2>/dev/null || true)
# skip files without `compatible` string
test -z "$dtbCompat" && continue
${flip (concatMapStringsSep "\n") overlays (o: ''
overlayCompat="$( fdtget -t s ${o.dtboFile} / compatible )"
# overlayCompat in dtbCompat
if [[ "$dtbCompat" =~ "$overlayCompat" ]]; then
echo "Applying overlay ${o.name} to $( basename $dtb )"
mv $dtb{,.in}
cp ${o.dtboFile}{,.dtbo}
dtmerge "$dtb.in" "$dtb" ${o.dtboFile}.dtbo;
rm $dtb.in ${o.dtboFile}.dtbo
overlayCompat="$(fdtget -t s "${o.dtboFile}" / compatible)"
# skip incompatible and non-matching overlays
if [[ ! "$dtbCompat" =~ "$overlayCompat" ]]; then
echo "Skipping overlay ${o.name}: incompatible with $(basename "$dtb")"
continue
fi
${optionalString ((o.filter or null) != null) ''
if [[ "''${dtb//${o.filter}/}" == "$dtb" ]]; then
echo "Skipping overlay ${o.name}: filter does not match $(basename "$dtb")"
continue
fi
''}
echo -n "Applying overlay ${o.name} to $(basename "$dtb")... "
mv "$dtb"{,.in}
# dtmerge requires a .dtbo ext for dtbo files, otherwise it adds it to the given file implicitly
dtboWithExt="$TMPDIR/$(basename "${o.dtboFile}").dtbo"
cp -r ${o.dtboFile} "$dtboWithExt"
dtmerge "$dtb.in" "$dtb" "$dtboWithExt"
echo "ok"
rm "$dtb.in" "$dtboWithExt"
'')}
done
'';
done'';
})