Re: still unclear on a couple DT questions from my initial post

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On Fri, 1 Sep 2017, Mark Rutland wrote:

> On Fri, Sep 01, 2017 at 01:29:31AM -0400, Robert P. J. Day wrote:
> >   again, more nitpicky pedantry, but from my initial post, i'm still
> > unclear on a couple things.
> >
> >   first, a number of powerpc .dts files contain the line:
> >
> >     dcr-parent = <&{/cpus/cpu@0}>;
> >
> > and it's not clear to me why there are curly braces there. that is the
> > only example of that, but i see no mention of that in the spec. is it
> > meaningful? or are they superfluous?
>
> This syntax allows us to refer to a node by path, even if it doesn't
> have an existing label. The &foo syntax only allows us to refer to
> an existing label called foo.

  ah ... is that mentioned in the spec somewhere? i don't recall
seeing that.

> >   also, the spec states that status could be set to "okay", but a pile
> > of .dts files in the current kernel have the shorter form:
> >
> >   status = "ok";
> >
> > and the current kernel code in drivers/of explicitly accepts both
> > forms. is that a formal spec property, or is the kernel code simply
> > allowing people to be sloppy?
>
> The kernel is catering for sloppiness. We should probably fix those up
> in the kernel tree.

  the vast majority of that is under arch/arm*, if you want to take
care of that, and i can see about the rest.

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
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