How to Apply CubeMX-Generated Device Tree to OpenST-Droid

[Steven-LIN]

Hi everyone,
I'm a beginner in Android development and currently working with the OpenST-Droid distribution. I have a question regarding the use of CubeMX: after generating the Device Tree using CubeMX, how should I integrate it into the OpenST-Droid distribution?

I’ve read the following article, but it doesn’t explain how to apply the Device Tree generated by CubeMX to OpenST-Droid:

STM32MPU Distribution Package for Android - stm32mpu

How to build OpenSTDroid distribution - stm32mpu

How to build kernel for Android - stm32mpu

Thank you in advance for your help!

[Steven-LIN]

Dear ST,

I have successfully completed the build, but I’m encountering an issue during the TF-A flashing process, which prevents it from proceeding normally.
The CPU is correctly recognized in the Yocto environment; however, in the Android system, the CPU information appears to be incorrect.
Are there any specific settings I should check, or any particular points I should pay attention to in this case?

Below are the logs from the flashing process for your reference:

Yocto Flashing Log:

NOTICE:  CPU: STM32MP257DAK Rev.?
NOTICE:  Model: STMicroelectronics custom STM32CubeMX board - openstlinux-6.6-yocto-scarthgap-mpu-v24.11.06
NOTICE:  Reset reason (0x2035):
INFO:      Power-on Reset (rst_por)
INFO:    PMIC2 version = 0x11
INFO:    PMIC2 product ID = 0x21
....

Android Flashing Log:

NOTICE:  CPU: STM32MP257DAL Rev.B

NOTICE:  Model: STMicroelectronics custom STM32CubeMX board - Android_TF-A

NOTICE:  BL2: v2.8-stm32mp2-r1.1(release):lts-v2.8.15-2-g5dbb5ed12-dirty(5dbb5ed1)

NOTICE:  BL2: Built : 17:54:54, Jul 28 2025

NOTICE:  Core ID 5533330b

NOTICE:  dwc3_get_dev_speed = HighSpeed

Thank you for your support!

[Steven-LIN]

I noticed that the tf-a-stm32mp2 patches used in Android and Yocto are different.
Android uses 0001-v2.8-stm32mp-r2-rc17.patch, while Yocto uses a newer patch: 0001-v2.10-stm32mp-r1.patch.
Would you recommend switching to the newer patch used in Yocto?