Re: FATAL ERROR: Unable to parse input tree

[Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>]

On Tue, Jun 03, 2014 at 02:25:25PM +0100, Pacman du34 wrote:
> 2014-06-03 15:02 GMT+02:00 Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>:
> > On Tue, Jun 03, 2014 at 01:53:24PM +0100, Pacman du34 wrote:
> >> Hello all,
> >>
> >> I am working on a new Linux port to a new architecture and I would like
> >> to add a dts file to describe my system.
> >>
> >> So first of all I wrote the following dts test file :
> >>
> >> / {
> >>     compatible = "manufacturer,cpu";
> >> };
> >>
> >> I've read that this is the minimum structure required for a device tree
> >> on the wiki.
> >>
> >> But when I try compiling it with dtc (the first line is the command
> >> line) I get this error message :
> >>
> >> dtc -I dts -O dtb -o my_file.dtb myfile.dts
> >>
> >> Error: myfile.dts:1.1-2 syntax error
> >> FATAL ERROR: Unable to parse input tree
> >
> > You're missing the DTS version. Try:
> >
> > /dts-v1/;
> > / {
> >         comaptible = "manufacturer,device";
> > };
> >
> > Cheers,
> > Mark.
> >
> >>
> >> I tried both the dtc version of Linux source code (1.2.0-g37c0b6a0) and
> >> dtc version installed with "apt-get install device-tree-compiler" (1.3.0).
> >>
> >> I searched on Google but I have not found relevant information for my issue.
> >>
> >> I really do not understand what the problem here and I am totally stuck.
> >> Any help will be appreciated.
> >>
> >> Thanks a lot in advance.
> >>
> >> Best regards.
> 
> That works, thank you very much,
> 
> I take this opportunity to ask another question... As I have to
> specify the DTS version, are there other versions, and if yes, what
> are their differences ? I mean, if there are other versions, why to
> choose the vesion 2 instead of 3 or 1 ?

There was a v0 a while back according to ePAPR, but it's obsolete,
incompatible and no-one uses it anymore (dtc doesn't support it as far
as I can tell). The flag is to tell v1 apart from v0.

There is not currently a v2 or later. Perhaps there might be in future,
so it's worth keeping the flag around, but at present there's
effectively only v1.

Cheers,
Mark.
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