[U-Boot] dts to dtb generation

[U-Boot] dts to dtb generation

[Marco Antônio Possamai]

Hello, all.

I need to get my device-tree blob done, in order to pass it along with
the image I've created (bootm command). I'm kind of new on the dtb
concept and I'm not sure if I'm doing it right. Have read some stuff
about it, though.

What I got is that I have to generate a .dtb out of this source file
(lite5200b.dts). But I can't get my dtc to work.

I've downloaded the latest version
(http://jdl.com/software/dtc-latest.tgz) and done the make command, but
it points some errors during building. Check the snippet:

...

BISON dtc-parser.tab.c
 DEP dtc-parser.tab.c
 LEX dtc-lexer.lex.c
make: flex: Command not found
 DEP checks.c
 DEP srcpos.c
 DEP treesource.c
 DEP livetree.c
 DEP data.c
 DEP fstree.c
 DEP flattree.c
 DEP dtc.c
 LEX dtc-lexer.lex.c
make: flex: Command not found
CHK version_gen.h
UPD version_gen.h
 DEP dtc.c
 LEX dtc-lexer.lex.c
make: flex: Command not found
CHK version_gen.h
 CC dtc.o
...

And after the 'make install' command it reports the same 'flex: Command
not found':

LEX dtc-lexer.lex.c
make: flex: Command not found
CHK version_gen.h

I've visited the http://www.embeddedlinuxprimer.com/dtc for the howto
steps.

Well, I guess it didn't complete the install, the console bashes the dtc
as 'not found'.

I'm aware there must be some small detail I must be missing in order to
get it right, but I'd really appreciate a pointer here.


Thanks for the attention.


Marco Ant?nio Possamai

Universidade Federal de Santa Catarina

P.S: I'm also aware this is possibly not the right mailing list to ask about device-tree compilers... but I haven't found one specific for it. Sorry for the inconvenience.

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[U-Boot] dts to dtb generation

[Jerry Van Baren]

Marco Ant?nio Possamai wrote:
> Hello, all.
> 
> I need to get my device-tree blob done, in order to pass it along with
> the image I've created (bootm command). I'm kind of new on the dtb
> concept and I'm not sure if I'm doing it right. Have read some stuff
> about it, though.
> 
> What I got is that I have to generate a .dtb out of this source file
> (lite5200b.dts). But I can't get my dtc to work.
> 
> I've downloaded the latest version
> (http://jdl.com/software/dtc-latest.tgz) and done the make command, but
> it points some errors during building. Check the snippet:

Good.

> BISON dtc-parser.tab.c
>  DEP dtc-parser.tab.c
>  LEX dtc-lexer.lex.c
> make: flex: Command not found

Bad.  You are done at this point.

[snip]

> I'm aware there must be some small detail I must be missing in order to
> get it right, but I'd really appreciate a pointer here.
> 
> 
> Thanks for the attention.
> Marco Ant?nio Possamai

Hi Marco,

You are missing the flex package, and thus the "flex" command, on your 
system.  Flex is a lexical parser (classic name "lex").

You didn't say what your host's distribution is.  If it is debian, you 
need to install the flex package.  RH/SuSE may name their package 
differently (probably not).
<http://packages.debian.org/search?keywords=flex&searchon=names&suite=all&section=all>

Best regards,
gvb

[U-Boot] dts to dtb generation

[Detlev Zundel]

Hi Marco,

> BISON dtc-parser.tab.c
>  DEP dtc-parser.tab.c
>  LEX dtc-lexer.lex.c
> make: flex: Command not found

Actually, I do not know, how an error message could be more clear than
that.  Obviously your Linux installation is missing the GNU lexical
scanner generator "flex".  It should be trivial to install that package
for the distro that you use.

Best wishes
  Detlev

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