STM32MP15 U-Boot

This article briefly describes the STM32MP15x lines support in U-Boot.

1. STM32MP15x lines support[edit source]

For detailed information, please read the file in the delivered U-Boot code = board/st/stm32mp1/README

Also available in official U-Boot Git.

Code :

Configuration Files:

defconfig file
config files
- include/configs/stm32mp1.h
Device tree in arch/arm/dts
- stm32mp157*-<board>.dts : same as kernel
- stm32mp157*-<board>-u-boot.dtsi : addition for u-boot ( <<device tree>>-u-boot.dtsi automatically included in build process)

Boot chain	defconfig	FSBL	SSBL	TEE support
Trusted Boot	stm32mp15_trusted_defconfig	TF-A	U-Boot u-boot.stm32	-
Trusted Boot with OP-TEE	stm32mp15_optee_defconfig	TF-A	U-Boot u-boot.stm32	yes
Basic Boot	stm32mp15_basic_defconfig	SPL u-boot-spl.stm32	U-Boot u-boot.img	-

Warning

The basic boot chain is not supported/promoted by STMicroelectronics to make product (see Boot chains overview for details).

Several targets/ boards are supported with the associated device-tree (same name as kernel):

Board part number	Description	Device tree
STM32MP157C-EV1 Evaluation board	MB1262+MB1263	stm32mp157c-ev1
STM32MP157C-ED1 Evaluation daughterboard	MB1263	stm32mp157c-ed1
STM32MP157A-DK1 Discovery kit	MB1272	stm32mp157a-dk1
STM32MP157C-DK2 Discovery kit	MB1272+MB1407	stm32mp157c-dk2

With <mode> = 'basic', 'trusted' or 'optee'

  make stm32mp15_<mode>_defconfig
  make DEVICE_TREE=<device tree name> all

  make stm32mp15_trusted_defconfig
  make DEVICE_TREE=stm32mp157c-ev1 all

Using export to select the device tree

  export KBUILD_OUTPUT=../build/trusted
  export DEVICE_TREE=stm32mp157c-dk2
  make stm32mp15_trusted_defconfig
  make all

  export KBUILD_OUTPUT=../build/basic
  make stm32mp15_basic_defconfig
  make DEVICE_TREE=stm32mp157c-ed1 all

  make stm32mp15_trusted_defconfig
  make EXT_DTB=boot/stm32mp157c-myboard.dtb all