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Merge pull request #187528 from rnhmjoj/pr-fix-dt-overlays

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nixos/hardware/device-tree: make overlays more reliable
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K900 2022-08-24 10:08:52 +03:00 committed by GitHub
commit 66d043b296
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2 changed files with 34 additions and 11 deletions
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10
nixos/modules/hardware/device-tree.nix
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@ -14,6 +14,15 @@ let
'';
};
filter = mkOption {
type = types.nullOr types.str;
default = null;
example = "*rpi*.dtb";
description = lib.mdDoc ''
Only apply to .dtb files matching glob expression.
'';
};
dtsFile = mkOption {
type = types.nullOr types.path;
description = lib.mdDoc ''
@ -150,6 +159,7 @@ in
'';
type = types.listOf (types.coercedTo types.path (path: {
name = baseNameOf path;
filter = null;
dtboFile = path;
}) overlayType);
description = lib.mdDoc ''

35
pkgs/os-specific/linux/device-tree/default.nix
View file

@ -8,22 +8,35 @@ with lib; {
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 $out --parents
| xargs -0 cp -v --no-preserve=mode --target-directory "$out" --parents
for dtb in $(find $out -type f -name '*.dtb'); do
dtbCompat="$( fdtget -t s $dtb / compatible )"
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 $dtb{,.in}
fdtoverlay -o "$dtb" -i "$dtb.in" ${o.dtboFile};
rm $dtb.in
overlayCompat="$(fdtget -t s "${o.dtboFile}" / compatible)"
# skip incompatible and non-matching overlays
if [[ ! "$dtbCompat" =~ "$overlayCompat" ]]; then
echo -n "Skipping overlay ${o.name}: incompatible with $(basename "$dtb")"
continue
fi
${optionalString (o.filter != null) ''
if [[ "''${dtb//${o.filter}/}" == "$dtb" ]]; then
echo -n "Skipping overlay ${o.name}: filter does not match $(basename "$dtb")"
continue
fi
''}
echo -n "Applying overlay ${o.name} to $(basename "$dtb")... "
mv "$dtb"{,.in}
fdtoverlay -o "$dtb" -i "$dtb.in" "${o.dtboFile}"
echo "ok"
rm "$dtb.in"
'')}
done