Quick rebuild of device tree only with Yocto/bitbake?
AFAIK there are two different ways of doing this.
- The kernel way: Using the scripts provided by the kernel
- Change to your kernel source directory (
<build dir>/tmp/work/<machine>/<kernel-name>/<kernel-version>/git/) - Execute the device-tree-compiler:
./scripts/dtc/dtc -I dts -O dtb -o ./devicetree.dtb path/to/devicetree.dts
- The bitbake way: Using the kernel's deploy job
- Call
$ bitbake <kernel-name> -f -c deploy - The generated device-tree-blob then can be found in
<build dir>/tmp/work/<machine>/<kernel-name>/<kernel-version>/build/arch/arm/boot/dts/)
At least for me both versions worked in a quick test.
UPDATE:
I just came over a third version of building the dtb with yocto on the net.
That one uses yocto's devshell of the kernel build.
For more information see the original authors page at https://splefty.blogspot.co.at/2015/09/compiling-device-tree-using-yocto.html.
For me using bitbake to regenerate the device tree worked in the following way:
Command: $ bitbake <kernel-name> -f -c compile
Example: $ bitbake linux-fslc -f -c compile
Tested using yocto sumo.