[yocto] dtb filename mismatch prevents booting

[Oliver Graute]

Hello list,

if I try to boot from my yocto generated SD-card image my u-boot can't
start the kernel because the imx6ul-14x14-evk.dtb is missing.


reading boot.scr
** Unable to read file boot.scr **
reading zImage
5072288 bytes read in 328 ms (14.7 MiB/s)
Booting from mmc ...
reading imx6ul-14x14-evk.dtb
** Unable to read file imx6ul-14x14-evk.dtb **
Kernel image @ 0x82000000 [ 0x000000 - 0x4d65a0 ]

Starting kernel ...


In my /boot folder I saw a dtb file, but the filename is a bit different.

zImage-imx6ul-14x14-evk.dtb instead of imx6ul-14x14-evk.dtb

So I changed these filename manually and my Image is booting.

mv zImage-imx6ul-14x14-evk.dtb imx6ul-14x14-evk.dtb
»zImage-imx6ul-14x14-evk.dtb“ -> »imx6ul-14x14-evk.dtb“

What is the right way to define these dtb filename?

I saw the IMAGE_BOOT_FILES in local.conf

#IMAGE_BOOT_FILES = "zImage zImage-imx6ul-14x14-evk.dtb"
IMAGE_BOOT_FILES = "zImage imx6ul-14x14-evk.dtb"

but after I changed it my build fails.

ERROR: Error: The image creation script '/home/graute/5411_IBIS/yocto/build-imx6ulevk/tmp/work/imx6ulevk-poky-linux-gnueabi/fsl-image/1.0-r0/temp/create_image.wic' returned 1:
Error: exec_cmd: install -m 0644 -D /home/graute/5411_IBIS/yocto/build-imx6ulevk/tmp/deploy/images/imx6ulevk/imx6ul-14x14-evk.dtb /home/graute/5411_IBIS/yocto/build-imx6ulevk/tmp/deploy/images/imx6ulevk/fsl-image-imx6ulevk-20160208144228/build/boot/imx6ul-14x14-evk.dtb returned '1' instead of 0
Checking basic build environment...
Done.

Creating image(s)...

WARNING: /home/graute/5411_IBIS/yocto/build-imx6ulevk/tmp/work/imx6ulevk-poky-linux-gnueabi/fsl-image/1.0-r0/temp/create_image.wic:1 exit 1 from
  BUILDDIR=/home/graute/5411_IBIS/yocto/build-imx6ulevk wic create $wks --vars /home/graute/5411_IBIS/yocto/build-imx6ulevk/tmp/sysroots/imx6ulevk/imgdata/ -e fsl-image -o $out/

ERROR: Function failed: do_rootfs
ERROR: Logfile of failure stored in: /home/graute/5411_IBIS/yocto/build-imx6ulevk/tmp/work/imx6ulevk-poky-linux-gnueabi/fsl-image/1.0-r0/temp/log.do_rootfs.17681
ERROR: Task 7 (/home/graute/5411_IBIS/yocto/os-meta-dnt/meta-fsl/recipes-fsl/images/fsl-image.bb, do_rootfs) failed with exit code '1'

some ideas whats going wrong here?

Best regards,

Oliver