On 11/7/25 4:56 PM, Tom Rini wrote:
On Fri, Nov 07, 2025 at 03:06:47PM +0100, Marek Vasut wrote:
On 11/7/25 10:12 AM, Heinrich Schuchardt wrote:
On 11/6/25 22:08, Marek Vasut wrote:
In case DEVICE_TREE_DEBUG is set, produce a diff between the base DT and
DT with U-Boot extras, to show how much does the U-Boot DT differ from
the base DT. This is particularly useful together with OF_UPSTREAM, to
minimize the diff between upstream DTs and U-Boot DTs.
Example usage:
$ make r8a779g3_sparrowhawk_defconfig && make DEVICE_TREE_DEBUG=1
$ cat ./dts/upstream/src/arm64/renesas/r8a779g3-sparrow-hawk.dtb.diff
This still has a downside. Even 'dtc -I dts -O dts ...' applied on
base DT and U-Boot augmented DT can produce different phandle IDs
for the same node in those two DTs, which results in a lot of noise
in the resulting diff. The only way I can think of is to patch DTC
to emit full paths in those phandles instead, something like a
phandle = <&{/full/path/to/remote/end} ...>;
What bothers me is ^ this part.
Hello Heinrich,
Without documentation developers will not know about the new feature.
Could you, please, add a doc/build/ change in the next iteration.
Sure, although I am not convinced it should go in in its current form.
Please see my first line of comment.
Maybe we put it in the u-boot-extras repo for now as a standalone
script, so people can be asked to run it and look at the output?
I'd say no, because the output is full of noise unless the phandle
non-resolution gets somehow improved.
