Best way to modify bitbake image

[WLeun.3]

Hi all,

I am using stm32mp157f-dk2 with ecosystem 3.1.

During development, I need to update the device tree and kernel config very often.

My current approach is to do

bitbake -c cleansstate <image>
bitbake virtual/kernel -c menuconfig
bitbake <image>

However, I found that bitbake -c cleansstate will reset all my kernel config that I have done in menuconfig.

This mean I need to reconfig my kernel every time I update my device tree, which is quite troublesome.

There should be some better way to do this.

Regards,

Leung

[Olivier GALLIEN]

Hi @WLeun.3​ ,

Please refer to Menuconfig or how to configure kernel - stm32mpu

It's clearly stated your approach is fine for temporary/prototyping solution.

For permanent one :

• To make this temporary modification permanent, the delta between defconfig and defconfig.old must be saved in a configuration fragment file (fragment-*.config) based on fragment.cfg file, and the Linux kernel configuration/compilation steps must be re-executed (as explained in the README.HOW_TO.txt helper file).

Hope it help

Olivier