Changes notification - v5.0.0

Revision as of 17:52, 4 July 2023 by Registered User
Applicable for STM32MP13x lines, STM32MP15x lines


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1. Article purpose[edit source]

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[edit source]

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 More info.png . 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.

Warning DB.png Important

In case of upgrade from OpenSTLinux ecosystem release v4, check first the previous release change notification listed below:


3. Impacted domains[edit source]

3.1. Yocto build environment for Distribution Package[edit source]

  • None

3.2. Hardware configuration[edit source]

Check the device tree files for the STMP32 MPU board:

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


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

  • None except alignement with Linux® kernel device tree

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

  • New SCMI thread provisioning
  • Reworked OCALL to OCALL2
  • Move SCMI mailbox to Linux/U-Boot memory
  • Full clock tree is applied in OP-TEE to allow clock tree update over FOTA
  • Support bit offset for NVMEM
  • Disable external device-tree support
  • Low-power fixes
  • For STM32MP15x lines More info.png:
    • OP-TEE build in DDR (pager OFF) : Some services are now default disabled


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

  • Remove BL32 (SP_MIN) configuration
  • BL2 always runs at 650MHz (PLL1 configuration removed from DT)
  • STM32MP15x lines More info.png RCC configuration updated to follow new bindings
  • Move compatible to secure RCC from SoC DT to board DT
  • Shared memory with OP-TEE removed
Info white.png 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 5.15-stm32mp-r2 6.1-stm32mp-r1 -- arch/arm/boot/dts/stm32mp1*

3.3. System configuration[edit source]


3.4. Boot stages[edit source]

  • ecosystem release v5.0.0 More info.png no more supports the TF-A SP-MIN as secure monitor.
    OP-TEE is only the supported BL32 and you must migrate the STM32MP15x lines More info.png projects to use it
  • The MTD partitions are defined in U-Boot device tree and no more in U-Boot defconfig

3.5. Security[edit source]

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

3.6. User space and applications[edit source]

  • None

4. References[edit source]




Microprocessor unit

Linux® is a registered trademark of Linus Torvalds.

Das U-Boot -- the universal boot loader (see U-Boot)

Open portable trusted execution environment

System control and management interface

Doubledata rate (memory domain)

Trusted firmware for Arm® Cortex®-A

Boot loader stage 3-2

Secure payload minimal

Boot loader stage 2

Device tree

Reset and clock control

Random number generator

Independent watchdog

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