On Thu, Nov 14, 2024 at 6:59 AM Segher Boessenkool <seg...@kernel.crashing.org> wrote: > > On Thu, Nov 07, 2024 at 10:35:58PM +1100, Michael Ellerman wrote: > > "Rob Herring (Arm)" <r...@kernel.org> writes: > > > While OpenFirmware originally allowed walking parent nodes and default > > > root values for #address-cells and #size-cells, FDT has long required > > > explicit values. It's been a warning in dtc for the root node since the > > > beginning (2005) and for any parent node since 2007. Of course, not all > > > FDT uses dtc, but that should be the majority by far. The various > > > extracted OF devicetrees I have dating back to the 1990s (various > > > PowerMac, OLPC, PASemi Nemo) all have explicit root node properties. > > > > I have various old device trees that have been given to me over the > > years, and as far as I can tell they all have these properties (some of > > them are partial trees so it's hard to be 100% sure). > > Many SUN systems won't have such superfluous properties. But does > anyone use such systems at all anymore, and do people use dtc with > those :-)
There's still a few presumably. Sparc is omitted from this warning already because I suspected a problem which was confirmed on v1 thanks to the DT dumps here[1]. Rob [1] https://git.kernel.org/pub/scm/linux/kernel/git/davem/prtconfs.git/
