On 13/02/2015 17:10, Rob Landley wrote:
On 02/12/2015 06:56 PM, Tim Bird wrote:
On 02/12/2015 02:30 PM, K Richard Pixley wrote:
On 2/12/15 14:01 , Tim Bird wrote:
On 02/12/2015 11:33 AM, K Richard Pixley wrote:
I'm having trouble figuring out how to embed a dtb file into my kernel.
I'm thinking that there should be a standard, architecture independent
facility for this akin to initramfs, yes?
Could someone please either point me to the standard facility, relevant
doc, a currently building board that uses the standard facility, or
outline what needs to be done to do this with a new board?
If it matters, (I can't think why it would), I'm working with powerpc on
a 3.10 kernel. But if there are better facilities in other versions I'd
appreciate hearing about that too.
The normal method is just to cat the two files together, like so:
$ cat zImage <filename>.dtb > zImage_w_dtb
See https://community.freescale.com/thread/315543 for one example, on ARM.
I'm not sure what the status is for appended DTBs on powerpc, but it's
easy enough you can just try it and see what happens.
-- Tim
Thanks!
How do I tell the kernel where to find that dtb? Is there a relevant
config option?
Usually you make the dtb from sources in the kernel.
I don't know how it works on powerpc, but on arm, the .dts
files are located in arch/arm/boot/dts, and you would make
the dtb for the corresponding "foo.dts" source
by typing:
$ make foo.dtb
It's probably somewhere in:
https://www.kernel.org/doc/Documentation/devicetree/booting-without-of.txt
Worth pointing out the folk over in linuxppc-dev are usually pretty
friendly, may be able to help out with this too.
https://lists.ozlabs.org/listinfo/linuxppc-dev
Cheers,
Hugh
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