Development with a local repository (linux kernel, u-boot, etc…) is a common
task when developing using the Yocto build system.
Yocto comes with a built-in devtool command that allows overriding the source
of a repository for a recipe, to allow development using a local repository
clone, instead of a remote Git repository.
The Hailo15 device tree is being built out of a dts file and additional dtsi files, for example, in case the of the Halio15 EVB (Evaluation Board) in security camera mode the device tree is built using hailo15-evb-security-camera.dts, hailo15-evb-base.dtsi and hailo15-base.dtsi.
- First enter the Yocto environment with the command:
source poky/oe-init-build-env
- create a local workspace for the relevant recipe, in this case linux-yocto-hailo
devtool modify linux-yocto-hailo
-
do the relevant device tree changes
-
build the modified recipe
bitbake linux-yocto-hailo -c compile -f
- deploy the modified kernel
bitbake linux-yocto-hailo -c deploy
- An update fitImage (which includes the kernel and the new dtb) will be created.
- it is advisable backing up the current fitImage, and copy the new firImage under the H15 /boot directory
- in case needed the entire image can be built
bitbake core-image-minimal
- In order to clean up and exit development workspace when done, run:
devtool reset linux-yocto-hailo