Hello
I am developing a custom board using the STM32MP255F-AK
Updates to the DeviceTree (DT) of a custom board placed in the `mata` layer are not reflected in the build.
I have already fetched the source using `devtool modify virtual/kernel`
The Device Tree for the custom board is located at .../layers/meta-st/meta-st-stm32mp-addons/mx/ddlskt/..
Edit the kernel's DT (stm32mp255f-ddlskt-mx.dts)
Add a marker to `model = “...”`: `model=“... AAA”`
I tried building it
$ bitbake virtual/kernel
Wrote Image.gz, *.dtb, and modules to the SD card and booted
(brd-ddlskt) # cat /proc/device-tree/model
STMicroelectronics custom STM32CubeMX board - openstlinux-6.6-yocto-scarthgap-mpu-v24.11.06
AAA has not been added to the model
Running `cleansstate` before building will reflect the updated device tree
$ bitbake -c cleansstate virtual/kernel
$ bitbake virtual/kernel
Write Image.gz, *.dtb, and modules to the SD card and boot
(brd-ddlskt) # cat /proc/device-tree/model
STMicroelectronics custom STM32CubeMX board - openstlinux-6.6-yocto-scarthgap-mpu-v24.11.06 AAA
AAA has been added to the model
Is there another way to apply the DT update?
Since running `cleansstate` takes a long time to build, I’d prefer to avoid it if possible
Best Regards,
--
okn
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We are proceeding with development by referring to ”https://wiki.st.com/stm32mpu/wiki/How_to_create_your_own_machine#Create_a_customer_machine
Build Configuration:
BB_VERSION = "2.8.0"
BUILD_SYS = "x86_64-linux"
NATIVELSBSTRING = "universal"
TARGET_SYS = "aarch64-ostl-linux"
MACHINE = "stm32mp25-ddlskt"
DISTRO = "openstlinux-weston"
DISTRO_VERSION = "5.0.3-snapshot-20260514"
TUNE_FEATURES = "aarch64 crc cortexa35"
TARGET_FPU = ""
DISTRO_CODENAME = "scarthgap"
ACCEPT_EULA_stm32mp25-disco = "1"
GCCVERSION = "13.%"
PREFERRED_PROVIDER_virtual/kernel = "linux-stm32mp"
