How to make .dtb from .dts file (how to set include path for #include .. ?)

How to make .dtb from .dts file (how to set include path for #include .. ?)

[ckim]

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Hello all,

 

In linux kernel source, there are many .dts files (device tree source)

For example there is a file ./arch/arm64/boot/dts/arm/juno.dts.

To tried to make juno.dtb from juno.dts but I don't know how to do it.

(by the way, once I did make for the kernel build, junno.dtb file seems to
be generated in the same directory)

 

Just in case I want to make my own .dts and .dtb, I tried compling juno.dts
file. (I had installed dtc on my ubuntu 16.04 machine before)

$ dtc -I dts -O dtb -o juno.dtb arch/arm64/boot/dts/arm/juno.dts

Error: arch/arm64/boot/dts/arm/juno.dts:11.1-9 syntax error

FATAL ERROR: Unable to parse input tree

The dtc program cannot process the line below in the .dts file.(line 11)

#include <dt-bindings/interrupt-controller/arm-gic.h>

 

I don't know how I should let the preprocessing kick in.

I tried (because there is
include/dt-bindings/interrupt-controller/arm-gic.h)

  $ dtc -i include -I dts -O dtb -o juno.dtb
arch/arm64/boot/dts/arm/juno.dts

But it doesn't work.

 

How can I use dtc program to make juno.dtb?

Or if I have to use Makefile, what is the command?

 

Thanks, 

 

Chan Kim


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Re: How to make .dtb from .dts file (how to set include path for #include .. ?)

[Ahmad Fatoum]

Hello Chan,

On 23.02.21 09:37, ckim@etri.re.kr wrote:
> I don't know how I should let the preprocessing kick in.
> 
> I tried (because there is
> include/dt-bindings/interrupt-controller/arm-gic.h)
> 
>   $ dtc -i include -I dts -O dtb -o juno.dtb
> arch/arm64/boot/dts/arm/juno.dts
> 
> But it doesn't work.

dtc only handles /include/. #include is expanded by a C preprocessor
that's explicitly run beforehand. Run make V=1 dtbs if you are curious
to see the commands executed.

> How can I use dtc program to make juno.dtb?
> 
> Or if I have to use Makefile, what is the command?

What reason for doing this by hand?

Cheers,
Ahmad

> 
>  
> 
> Thanks, 
> 
>  
> 
> Chan Kim
> 
> 
> 
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies@kernelnewbies.org
> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> 

-- 
Pengutronix e.K.                           |                             |
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Aw: How to make .dtb from .dts file (how to set include path for #include .. ?)

[Martin Herdeis]

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RE: How to make .dtb from .dts file (how to set include path for #include .. ?)

[ckim]

Hello Ahmad,

Thanks for the kind reply.
I've checked adding a .dts file in the directory and adding it in the
Makefile there, and doing "make dts" at the build top does the job. As you
said, I think I can just do with this method.
Thank you!
Best regards,

Chan

> -----Original Message-----
> From: Ahmad Fatoum <a.fatoum@pengutronix.de>
> Sent: Tuesday, February 23, 2021 6:28 PM
> To: ckim@etri.re.kr; kernelnewbies@kernelnewbies.org
> Subject: Re: How to make .dtb from .dts file (how to set include path for
> #include .. ?)
> 
> Hello Chan,
> 
> On 23.02.21 09:37, ckim@etri.re.kr wrote:
> > I don't know how I should let the preprocessing kick in.
> >
> > I tried (because there is
> > include/dt-bindings/interrupt-controller/arm-gic.h)
> >
> >   $ dtc -i include -I dts -O dtb -o juno.dtb
> > arch/arm64/boot/dts/arm/juno.dts
> >
> > But it doesn't work.
> 
> dtc only handles /include/. #include is expanded by a C preprocessor
> that's explicitly run beforehand. Run make V=1 dtbs if you are curious to
> see the commands executed.
> 
> > How can I use dtc program to make juno.dtb?
> >
> > Or if I have to use Makefile, what is the command?
> 
> What reason for doing this by hand?
> 
> Cheers,
> Ahmad
> 
> >
> >
> >
> > Thanks,
> >
> >
> >
> > Chan Kim
> >
> >
> >
> > _______________________________________________
> > Kernelnewbies mailing list
> > Kernelnewbies@kernelnewbies.org
> > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> >
> 
> --
> Pengutronix e.K.                           |                             |
> Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
> 31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
> Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |





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Re: Aw: How to make .dtb from .dts file (how to set include path for #include .. ?)

[linux lover]

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Sent from my iPhone

> On Feb 23, 2021, at 5:34 PM, Martin Herdeis <martinherdeis@gmx.de> wrote:
> 
>  
> Hello Chan,
>  
> haven't tried to build dtb myselfe yet but maybe this helps:
>  
> https://bootlin.com/pub/conferences/2013/elce/petazzoni-device-tree-dummies/petazzoni-device-tree-dummies.pdf
> https://www.youtube.com/watch?v=m_NyYEBxfn8
> https://bootlin.com/blog/device-tree-101-webinar-slides-and-videos/
>  
> Martin
> Gesendet: Dienstag, 23. Februar 2021 um 09:37 Uhr
> Von: ckim@etri.re.kr
> An: kernelnewbies@kernelnewbies.org
> Betreff: How to make .dtb from .dts file (how to set include path for #include .. ?)
> Hello all,
> 
>  
> 
> In linux kernel source, there are many .dts files (device tree source)
> 
> For example there is a file ./arch/arm64/boot/dts/arm/juno.dts.
> 
> To tried to make juno.dtb from juno.dts but I don’t know how to do it.
> 
> (by the way, once I did make for the kernel build, junno.dtb file seems to be generated in the same directory)
> 
>  
> 
> Just in case I want to make my own .dts and .dtb, I tried compling juno.dts file. (I had installed dtc on my ubuntu 16.04 machine before)
> 
> $ dtc -I dts -O dtb -o juno.dtb arch/arm64/boot/dts/arm/juno.dts
> 
> Error: arch/arm64/boot/dts/arm/juno.dts:11.1-9 syntax error
> 
> FATAL ERROR: Unable to parse input tree
> 
> The dtc program cannot process the line below in the .dts file.(line 11)
> 
> #include <dt-bindings/interrupt-controller/arm-gic.h>
> 
>  
> 
> I don’t know how I should let the preprocessing kick in.
> 
> I tried (because there is include/dt-bindings/interrupt-controller/arm-gic.h)
> 
>   $ dtc -i include -I dts -O dtb -o juno.dtb arch/arm64/boot/dts/arm/juno.dts
> 
> But it doesn’t work.
> 
>  
> 
> How can I use dtc program to make juno.dtb?
> 
> Or if I have to use Makefile, what is the command?
> 
>  
> 
> Thanks,
> 
>  
> 
> Chan Kim
> 
> _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies@kernelnewbies.org
> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies

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