Hi,

On Jul 15, 2012, at 9:23 PM, Elvis Dowson wrote:

I tried various combinations, but all of them did not yield a dtb file.

KERNEL_DEVICETREE = "virtex440-ml507.dtb" (as you suggested in your original email, but I guess it might have been a typo? should be .dts?)
KERNEL_DEVICETREE = "virtex440-ml507.dts"
KERNEL_DEVICETREE = "arch/powerpc/boot/dts/virtex440-ml507.dts"

How exactly should I specify the .dts to get yocto to generate the .dtb file?

I found the solution, I had to ensure that the KERNEL_DEVICE tree variable evaluate to the following

KERNEL_DEVICETREE = "${S}/arch/powerpc/boot/dts/virtex440-ml507.dts"

i.e. it was missing the ${S} prefix.

Elvis Dowson