[meta-xilinx] Adding a new dts file to a bitbake build

[Nathan Rossi]

On 19 October 2017 at 06:58, Patricia Sandt <patricia_sandt at trimble.com> wrote:
> We are developing a custom board based on the 7020. We have a functioning
> Petalinux build, but I've been tasked with getting a yocto poky build
> working with the same board.
>
> I have used online tutorials/instructions and now have a working bitbake
> build with poky + meta-xilinx. I've copied and renamed meta-xilinx to
> meta-xilinx-custom. I've changed many files that referenced zynq7-zc702 or
> zc702-zynq files to use zynq7-zc702-custom. I've removed meta-xilinx from
> the project and added meta-xilinx-custom. The build seems to go smoothly

I would recommend against forking meta-xilinx and patching it, as the
main feature of Yocto/OE is layers of which their purpose is to
append/override/modify configuration for your project.

> until I get to the dts -> dtb step. Then I'm told that there is no rule to
> make 'arch/arm/boot/dts/zynq7-zc702-custom.dtb'. This error is immediately
> followed by a reference to arch/arm/Makefile, which appears in several
> places in tmp/work and tmp/work-shared.
>
> My repo does not include build/tmp, so I'm relatively certain that I don't
> want to edit these files directly. I do find :
> dtb-$(CONFIG_ARCH_ZYNQ) += zynq-zc702.dtb \
> zynq-zc706.dtb \
> zynq-zed.dtb \
> zynq-zybo.dtb \
> zynq-microzed.dtb \
> zynq-cc108.dtb \
> zynq-picozed.dtb \
> zynq-topic-miami.dtb \
> zynq-topic-miamiplus.dtb \
> zynq-zc770-xm010.dtb \
> zynq-zc770-xm011.dtb \
> zynq-zc770-xm012.dtb \
> zynq-zc770-xm013.dtb
>
> in the Makefile in /build/tmp/work/.../git/arch/arm/dts.
>
> How do I add zynq7-zc702-custom.dtb to this file without editing it
> directly?

If you didn't patch the kernel to add your "zynq7-zc702-custom.dtb"
then it wont exist and you wont be able to build it via
KERNEL_DEVICETREE. There are a number of threads on this mailing list
where people have discussed adding custom dts/dtb to their build. Here
are a couple that should get you on track.

https://lists.yoctoproject.org/pipermail/meta-xilinx/2017-April/002673.html
https://lists.yoctoproject.org/pipermail/meta-xilinx/2017-March/002586.html

Regards,
Nathan