Changes notification

Applicable for

STM32MP13x lines, STM32MP15x lines

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1 Article purpose

The article aims to help rebase an STM32 MPU project on a new ecosystem release by focusing on the impacts of the main changes.

2 Scope of this article

This article provides some details for the main changes between STM32 MPU ecosystem release v4.1.0 and new STM32 MPU ecosystem release v5.0.0 . The aim is to help migrate your project.

All Information about the features delivered in the new release is also available in the OpenSTLinux release note.

Important

In case of upgrade from OpenSTLinux ecosystem release v4.0.0, check first the previous release change notification available in the wiki dedicated to the v4.y.z ecosystem releases: STM32 MPU OpenSTLinux release changes notification – v4.1.0

3 Impacted domains

3.1 Yocto build environment for Distribution Package

• For the process to enable secure boot from Distribution package updated, refer to dedicated wiki page.

3.2 Hardware configuration

Check the device tree files for the STMP32 MPU board for more details:

Linux^® kernel: between Linux kernel v6.1-stm32mp-r1 (v6.1.28) and previous Linux kernel v5.15-stm32mp-r2 (v5.15.67)

• arm_wdt node enabled for watchdog
• New etzpc node section

U-Boot: between U-Boot v2022.10-stm32mp-r1 and previous U-Boot v2021.10-stm32mp-r2

• Alignment with Linux^® kernel device tree

OP-TEE: between OP-TEE 3.19.0-stm32mp-r1 and previous OP-TEE 3.16.0-stm32mp-r2

• Alignment with Linux^® kernel device tree

TF-A: between TF-A v2.8-stm32mp-r1 and previous TF-A v2.6-stm32mp-r2

• Alignment with Linux^® kernel device tree
• BL2 always runs at 650MHz (PLL1 configuration removed from DT)
• Move compatible field to secure RCC from SoC DT to board DT
• Shared memory with OP-TEE removed
• For STM32MP15x lines 
  • RCC configuration updated to follow new bindings

Information

This is possible with git diff command to get delta between two branches in the same repository. Example with STLINUX GitHub repository and for all STM32MP1 device tree files: git diff v5.15-stm32mp-r2 v6.1-stm32mp-r1 -- arch/arm/boot/dts/stm32mp1*

3.3 System configuration

• None

3.4 Boot stages

• This ecosystem release v5.0.0 does not support anymore the TF-A SP-MIN as secure monitor.
  OP-TEE is only the supported BL32 and you must migrate the STM32MP15x lines  projects to be able to use it.
• The MTD partitions are defined in U-Boot device tree and are no more defined in U-Boot defconfig.

3.5 Security

• New implementation of a secure watchdog
• New device-tree RNG configuration
• Use of a watchdog framework
• IWDG early-interrupt fixing

3.6 User space and applications

• None