On Wed, Jan 13, 2021 at 02:30:03PM +0100, Neil Armstrong wrote: > Hi, > > On 08/01/2021 01:39, Bill Mills wrote: > > All, > > > > On the Devicetree evolution call Wednesday I promised to finish my > > comparison of u-boot DT vs kernel DT. > > The script is not perfect but the results are still interesting. > > > > For each dts and dtsi file in the tip of the u-boot tree, it tries to > > correlate it to the kernel tip. > > It compares git SHA1 signatures or falls back to filenames. > > The results were surprising to me but perhaps they should not have been. > > > > I have checked in the script[1] and the full results here [2] > > > > The full file lists (with some diff stats) are in the root dir. > > Example [3] > > > > I also looked at the line count of the u-boot override files. > > Even though we don't expect these to correlate, we do expect reasonable > > usage to result in small files. Big files are an indication of possible > > abuse of the system. (I don't think the idea was to have wholesale new > > versions of the DTS as an override.) > > > > I plan to redo the script in python. It will be much easier to be more > > precise and to look deeper. (For example figure out how old the u-boot > > version is in number of change sets and number of days. Or if no content > > sync now were they ever synced?) > > > > Here is the scripts output: (from summary.txt) > > > > Devicetree sync status for u-boot v2021.01-rc5-7-gb8c725e736 > > Compared to kernel v5.11-rc2-156-g71c061d24438 > > Do not compare with a such kernel, usually DT is sync'ed from stable kernels, > or -rc1, so 5.11 stuff will eventually go for next u-boot release, not the > actual one. > > We (amlogic/meson) will sync part of DT with 5.10 for next release, the > previous is sync'ed to 5.9/5.8. > > It's almost impossible to sync to each release.
It's also something left up to the custodians, but it's also expected to sync things when our -rc1 window is open with the latest best-choice upstream Linux kernel. There is of course, work to be done still and tooling to better / more easily identify the gaps is good. -- Tom
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