[PATCH 0/8] An effort to bring DT bindings compliance within U-boot

Tom Rini trini at konsulko.com
Thu Dec 14 19:23:28 CET 2023

On Thu, Dec 14, 2023 at 03:53:11PM +0100, neil.armstrong at linaro.org wrote:
> Hi,
> On 14/12/2023 14:50, Sumit Garg wrote:
> > Prerquisite
> s/Prerquisite/Prerequisite/
> > -----------
> > 
> > This patch series requires devicetree-rebasing git repo to be added as a
> > subtree to the main U-boot repo via:
> > 
> > $ git subtree add --prefix devicetree-rebasing \
> >        git://git.kernel.org/pub/scm/linux/kernel/git/devicetree/devicetree-rebasing.git \
> >        v6.6-dts --squash
> So I think the big question is: when should the subtree be updated ?
> Because as we discussed in the previous GH pull request, if a bindings changes
> was made in the upstream Linux DT, then the subtree update should wait until
> the u-boot support is merged before updating. This could cause a lot of frustration.
> And this could cause a lot of regressions, even more if both Linux and U-boot are
> not maintained by the same people.

I think some of the important questions to ask are, how often / likely
are the breakages to occur? It seems like these days it's either:
- U-Boot had an early version of the binding and we already state we
  don't support backwards compatibility here. It should be on the
  maintainer to be proactive in this case.
- It's a "the DT was wrong about the hardware, sorry not sorry it's an
  incompatible DTS change now". This too is hopefully the kind of thing
  that at least board maintainers will be more actively aware of needing
  to deal with in U-Boot, if it's really a problem.

So I would plan on grabbing only full kernel releases and in to -next as
soon as possible. Our cadences don't match up exactly, but I think do
fairly well enough.

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