Re: Devicetree Maintenance in barebox

[Alexander Shiyan]

Hello.

Пятница,  7 февраля 2014, 8:13 +01:00 от Sascha Hauer <s.hauer at pengutronix.de>:
> Hi All,
> 
> It's becoming more obvious that devicetree maintenance is painful
> because we have to sync them to the kernel regularly. My hope was that
> this would get simpler once the devicetrees get their own repository
> outside the kernel, but it seems that won't happen anytime soon.
> 
> So my current idea to continue with barebox devicetrees is:
> 
> - Maintain a kernel branch which has all devicetree changes we need in
> barebox in a clean step-by-step series
> - rebase this branch regularly on the newer kernel
> - Copy the resulting devicetrees to barebox
> 
> The upside is that we have up to date devicetrees in barebox without
> having to resync them by hand on a per SoC basis.  Of course this also
> means that we lose the devicetree history and breakage may be introduced
> with some huge commits saying "Update devicetrees to Linux-3.x".
> 
> Any better ideas? I think we have to do something.

As far as I know, in the community have any thoughts on the transfer of the DT data
in a separate project, but most likely it will not be soon ...

At the moment, I want to suggest to use only non-modified DT files, i.e. barebox
should use to build their own files, which include the original data from the kernel.

Just for example:
# ls
bb_<board.dts>
<board.dts>

# cat bb_<board.dts>

#include "<board.dts>"
/* All overrides here */
chosen {
  ...
};

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