While considering to propose WoA EL2 dt overlays upstream I was looking
at existing overlays and noticed that some of them are broken: they put
seemingly meaningful fixups into the overlay's "/" node, which places
them into the overlay "metadata" itself, not into a fixup fragment to be
applied to the actual dtb. This series fixes those two by changing to
full path "&{/}" which should work as it was initially intended.
See demonstration of the problem below:
$ cat base.dts
/dts-v1/;
/ {
compatible = "fake,board";
fake,value = <42>;
};
$ cat extra.dtso
/dts-v1/;
/plugin/;
/ {
foo;
bar { baz; };
};
&{/} { whatever-comes-next-after-baz; };
$ dtc base.dts -o base.dtb
$ dtc extra.dtso -o extra.dtbo
$ fdtoverlay -i base.dtb -o combine.dtb extra.dtbo
$ dtc base.dtb
/dts-v1/;
/ {
compatible = "fake,board";
fake,value = <0x2a>;
};
$ dtc extra.dtbo
/dts-v1/;
/ {
foo;
bar {
baz;
};
fragment@0 {
target-path = "/";
__overlay__ {
whatever-comes-next-after-baz;
};
};
};
$ dtc combine.dtb
/dts-v1/;
/ {
whatever-comes-next-after-baz;
compatible = "fake,board";
fake,value = <0x2a>;
};
In the resulting dtb foo bar and baz are missing.
Signed-off-by: Nikita Travkin <nikita@xxxxxxx>
---
Nikita Travkin (2):
arm64: dts: qcom: qrb5165-rb5-vision-mezzanine: Fix broken overlay root
arm64: dts: qcom: sdm845-db845c-navigation-mezzanine: Fix the overlay root
arch/arm64/boot/dts/qcom/qrb5165-rb5-vision-mezzanine.dtso | 2 +-
arch/arm64/boot/dts/qcom/sdm845-db845c-navigation-mezzanine.dtso | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
---
base-commit: 8433c776e1eb1371f5cd40b5fd3a61f9c7b7f3ad
change-id: 20250226-qcom-nonroot-overlays-bfe21d33be8c
Best regards,
--
Nikita Travkin <nikita@xxxxxxx>
