What will be the correct steps to modify the dts file (stm32mp157a-dk1.dts) and deploy to the deploy/images for flashing to sdcard

[JLeun.1]

My goal is to add i2c5 in the dts for userspace access however it is not visible at /sys/bus/i2c/devices. My steps are as follows:

1) bitbake virtual/kernel -c devshell

2) in new shell, modify the arch/arm/boot/dts/stm32mp157a-dk1.dts

3) in new shell, make dtbs or make stm32mp157a-dk1.dtb, and close the new shell

4) in original shell, bitbake virtual/kernel -f -c compile and bitbake virtual/kernel -f -c compile

5) build-openstlinuxweston-stm32mp1/tmp-glibc/deploy/images/stm32mp1/scripts/create_sdcard_from_flashlayout.sh ../flashlayout_st-image-weston/trusted/FlashLayout_sdcard_stm32mp157a-dk1-trusted.tsv and create the .raw for dd to the sdcard

However, with above steps seems the updated dtb file is not populated to the sdcard image. Am I missing some steps?

[ArmandG · Accepted solution]

Hi @JLeun.1​ ,

Isn't it working by simply doing:

-Modifying your arch/arm/boot/dts/stm32mp157a-dk1.dts file

-bitbake virtual/kernel -C compile

(Your .dtb file is automatically generated in build-openstlinuxweston-stm32mp1/tmp-glibc/deploy/images/stm32mp1/kernel)

-Flashing the .tsv file with build-openstlinuxweston-stm32mp1/tmp-glibc/deploy/images/stm32mp1 directory as binary path

Regards,

Armand

[Olivier GALLIEN]

Hi @JLeun.1​ 

If a comment answer your question, please close this topic by choosing Select as Best. This will help other users to find that answer faster.

Olivier