diff options
author | Tom Rini <trini@konsulko.com> | 2020-03-02 09:20:30 -0500 |
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committer | Tom Rini <trini@konsulko.com> | 2020-03-02 09:20:30 -0500 |
commit | 8aad16916d04e3db0d1652cb96e840e209e19252 (patch) | |
tree | 0e06639b31199dcaf51ea01a8125b764e773d75e /board | |
parent | bd7bb38699412bf95449bf9f23aa625c0436eae6 (diff) | |
parent | efa667d38bb8bdd548972e10d02d830d9256602d (diff) |
Merge tag 'u-boot-stm32-20200203' of https://gitlab.denx.de/u-boot/custodians/u-boot-stm
- convert stm32mp1 board documentation to rst format
Diffstat (limited to 'board')
-rw-r--r-- | board/st/stm32mp1/README | 520 |
1 files changed, 1 insertions, 519 deletions
diff --git a/board/st/stm32mp1/README b/board/st/stm32mp1/README index 5d7465a8c8..8172d26a66 100644 --- a/board/st/stm32mp1/README +++ b/board/st/stm32mp1/README @@ -1,519 +1 @@ -SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause -# -# Copyright (C) 2018 STMicroelectronics - All Rights Reserved -# - -U-Boot on STMicroelectronics STM32MP15x -======================================= - -1. Summary -========== -This is a quick instruction for setup stm32mp1 boards. - -2. Supported devices -==================== -U-Boot supports STMP32MP15x SoCs: STM32MP157, STM32MP153 and STM32MP151 - -The STM32MP15x is a Cortex-A MPU aimed at various applications. -It features: -- Dual core Cortex-A7 application core (Single on STM32MP151) -- 2D/3D image composition with GPU (only on STM32MP157) -- Standard memories interface support -- Standard connectivity, widely inherited from the STM32 MCU family -- Comprehensive security support - -Everything is supported in Linux but U-Boot is limited to: -1. UART -2. SDCard/MMC controller (SDMMC) -3. NAND controller (FMC) -4. NOR controller (QSPI) -5. USB controller (OTG DWC2) -6. Ethernet controller - -And the necessary drivers -1. I2C -2. STPMIC1 (PMIC and regulator) -3. Clock, Reset, Sysreset -4. Fuse - -Currently the following boards are supported: -+ stm32mp157a-avenger96.dts -+ stm32mp157a-dk1.dts -+ stm32mp157c-dk2.dts -+ stm32mp157c-ed1.dts -+ stm32mp157c-ev1.dts - -3. Boot Sequences -================= - -BootRom => FSBL in SYSRAM => SSBL in DDR => OS (Linux Kernel) - -with FSBL = First Stage Bootloader - SSBL = Second Stage Bootloader - -3 boot configurations are supported: - -1) The "Trusted" boot chain (defconfig_file : stm32mp15_trusted_defconfig) - BootRom => FSBL = Trusted Firmware-A (TF-A) => SSBL = U-Boot - TF-A performs a full initialization of Secure peripherals and installs a - secure monitor. - U-Boot is running in normal world and uses TF-A monitor - to access to secure resources. - -2) The "Trusted" boot chain with OP-TEE - (defconfig_file : stm32mp15_optee_defconfig) - BootRom => FSBL = Trusted Firmware-A (TF-A) => SSBL = U-Boot - TF-A performs a full initialization of Secure peripherals and installs OP-TEE - from specific partitions (teeh, teed, teex). - U-Boot is running in normal world and uses OP-TEE monitor to access - to secure resources. - -3) The "Basic" boot chain (defconfig_file : stm32mp15_basic_defconfig) - BootRom => FSBL = U-Boot SPL => SSBL = U-Boot - SPL has limited security initialisation - U-Boot is running in secure mode and provide a secure monitor to the kernel - with only PSCI support (Power State Coordination Interface defined by ARM). - -All the STM32MP15x boards supported by U-Boot use the same generic board -stm32mp1 which support all the bootable devices. - -Each board is configurated only with the associated device tree. - -4. Device Tree Selection -======================== - -You need to select the appropriate device tree for your board, -the supported device trees for stm32mp157 are: - -+ ev1: eval board with pmic stpmic1 (ev1 = mother board + daughter ed1) - dts: stm32mp157c-ev1 - -+ ed1: daughter board with pmic stpmic1 - dts: stm32mp157c-ed1 - -+ dk1: Discovery board - dts: stm32mp157a-dk1 - -+ dk2: Discovery board = dk1 with a BT/WiFI combo and a DSI panel - dts: stm32mp157c-dk2 - -+ avenger96: Avenger96 board from Arrow Electronics - dts: stm32mp157a-avenger96 - -5. Build Procedure -================== - -1. Install required tools for U-Boot - - + install package needed in U-Boot makefile - (libssl-dev, swig, libpython-dev...) - + install ARMv7 toolchain for 32bit Cortex-A (from Linaro, - from SDK for STM32MP15x, or any crosstoolchains from your distribution) - -2. Set the cross compiler: - - # export CROSS_COMPILE=/path/to/toolchain/arm-linux-gnueabi- - (you can use any gcc cross compiler compatible with U-Boot) - -3. Select the output directory (optional) - - # export KBUILD_OUTPUT=/path/to/output - - for example: use one output directory for each configuration - # export KBUILD_OUTPUT=stm32mp15_trusted - # export KBUILD_OUTPUT=stm32mp15_optee - # export KBUILD_OUTPUT=stm32mp15_basic - - you can build outside of code directory: - # export KBUILD_OUTPUT=../build/stm32mp15_trusted - -4. Configure U-Boot: - - # make <defconfig_file> - - - For trusted boot mode : "stm32mp15_trusted_defconfig" - - For trusted with OP-TEE boot mode : "stm32mp15_optee_defconfig" - - For basic boot mode: "stm32mp15_basic_defconfig" - -5. Configure the device-tree and build the U-Boot image: - - # make DEVICE_TREE=<name> all - - example: - a) trusted boot on ev1 - # export KBUILD_OUTPUT=stm32mp15_trusted - # make stm32mp15_trusted_defconfig - # make DEVICE_TREE=stm32mp157c-ev1 all - - b) trusted with OP-TEE boot on dk2 - # export KBUILD_OUTPUT=stm32mp15_optee - # make stm32mp15_optee_defconfig - # make DEVICE_TREE=stm32mp157c-dk2 all - - c) basic boot on ev1 - # export KBUILD_OUTPUT=stm32mp15_basic - # make stm32mp15_basic_defconfig - # make DEVICE_TREE=stm32mp157c-ev1 all - - d) basic boot on ed1 - # export KBUILD_OUTPUT=stm32mp15_basic - # make stm32mp15_basic_defconfig - # make DEVICE_TREE=stm32mp157c-ed1 all - - e) basic boot on dk1 - # export KBUILD_OUTPUT=stm32mp15_basic - # make stm32mp15_basic_defconfig - # make DEVICE_TREE=stm32mp157a-dk1 all - - f) basic boot on avenger96 - # export KBUILD_OUTPUT=stm32mp15_basic - # make stm32mp15_basic_defconfig - # make DEVICE_TREE=stm32mp157a-avenger96 all - -6. Output files - - BootRom and TF-A expect binaries with STM32 image header - SPL expects file with U-Boot uImage header - - So in the output directory (selected by KBUILD_OUTPUT), - you can found the needed files: - - a) For Trusted boot (with or without OP-TEE) - + FSBL = tf-a.stm32 (provided by TF-A compilation) - + SSBL = u-boot.stm32 - - b) For Basic boot - + FSBL = spl/u-boot-spl.stm32 - + SSBL = u-boot.img - -6. Switch Setting for Boot Mode -=============================== - -You can select the boot mode, on the board with one switch : - -- on the daugther board ed1 with the switch SW1 : BOOT0, BOOT1, BOOT2 - - ----------------------------------- - Boot Mode BOOT2 BOOT1 BOOT0 - ----------------------------------- - Reserved 0 0 0 - NOR 0 0 1 - SD-Card 1 0 1 - eMMC 0 1 0 - NAND 0 1 1 - Recovery 1 1 0 - Recovery 0 0 0 - -- on board DK1/DK2 with the switch SW1 : BOOT0, BOOT2 - (BOOT1 forced to 0, NOR not supported) - - -------------------------- - Boot Mode BOOT2 BOOT0 - -------------------------- - Reserved 1 0 - SD-Card 1 1 - Recovery 0 0 - -- Boot mode of Avenger96 can be selected using switch S3 - - ----------------------------------- - Boot Mode BOOT2 BOOT1 BOOT0 - ----------------------------------- - Recovery 0 0 0 - NOR 0 0 1 - SD-Card 1 0 1 - eMMC 0 1 0 - NAND 0 1 1 - Reserved 1 0 0 - Recovery 1 1 0 - SD-Card 1 1 1 - -Recovery is a boot from serial link (UART/USB) and it is used with -STM32CubeProgrammer tool to load executable in RAM and to update the flash -devices available on the board (NOR/NAND/eMMC/SDCARD). -The communication between HOST and board is based on -- for UARTs : the uart protocol used with all MCU STM32 -- for USB : based on USB DFU 1.1 (without the ST extensions used on MCU STM32) - -7. Prepare an SDCard -=================== - -The minimal requirements for STMP32MP1 boot up to U-Boot are: -- GPT partitioning (with gdisk or with sgdisk) -- 2 fsbl partitions, named fsbl1 and fsbl2, size at least 256KiB -- one ssbl partition for U-Boot - -Then the minimal GPT partition is: - ----- ------- --------- -------------- - | Num | Name | Size | Content | - ----- ------- -------- --------------- - | 1 | fsbl1 | 256 KiB | TF-A or SPL | - | 2 | fsbl2 | 256 KiB | TF-A or SPL | - | 3 | ssbl | enought | U-Boot | - | * | - | - | Boot/Rootfs | - ----- ------- --------- -------------- - -(*) add bootable partition for extlinux.conf - following Generic Distribution - (doc/README.distro for use) - - according the used card reader select the block device - (/dev/sdx or /dev/mmcblk0) - in the next example I use /dev/mmcblk0 - -for example: with gpt table with 128 entries - - a) remove previous formatting - # sgdisk -o /dev/<SDCard dev> - - b) create minimal image - # sgdisk --resize-table=128 -a 1 \ - -n 1:34:545 -c 1:fsbl1 \ - -n 2:546:1057 -c 2:fsbl2 \ - -n 3:1058:5153 -c 3:ssbl \ - -p /dev/<SDCard dev> - - you can add other partitions for kernel - one partition rootfs for example: - -n 4:5154: -c 4:rootfs \ - - c) copy the FSBL (2 times) and SSBL file on the correct partition. - in this example in partition 1 to 3 - - for basic boot mode : <SDCard dev> = /dev/mmcblk0 - # dd if=u-boot-spl.stm32 of=/dev/mmcblk0p1 - # dd if=u-boot-spl.stm32 of=/dev/mmcblk0p2 - # dd if=u-boot.img of=/dev/mmcblk0p3 - - for trusted boot mode : - # dd if=tf-a.stm32 of=/dev/mmcblk0p1 - # dd if=tf-a.stm32 of=/dev/mmcblk0p2 - # dd if=u-boot.stm32 of=/dev/mmcblk0p3 - -To boot from SDCard, select BootPinMode = 1 0 1 and reset. - -8. Prepare eMMC -=============== -You can use U-Boot to copy binary in eMMC. - -In the next example, you need to boot from SDCARD and the images (u-boot-spl.stm32, u-boot.img) -are presents on SDCARD (mmc 0) in ext4 partition 4 (bootfs). - -To boot from SDCard, select BootPinMode = 1 0 1 and reset. - -Then you update the eMMC with the next U-Boot command : - -a) prepare GPT on eMMC, - example with 2 partitions, bootfs and roots: - - # setenv emmc_part "name=ssbl,size=2MiB;name=bootfs,type=linux,bootable,size=64MiB;name=rootfs,type=linux,size=512" - # gpt write mmc 1 ${emmc_part} - -b) copy SPL on eMMC on firts boot partition - (SPL max size is 256kB, with LBA 512, 0x200) - - # ext4load mmc 0:4 0xC0000000 u-boot-spl.stm32 - # mmc dev 1 - # mmc partconf 1 1 1 1 - # mmc write ${fileaddr} 0 200 - # mmc partconf 1 1 1 0 - -c) copy U-Boot in first GPT partition of eMMC - - # ext4load mmc 0:4 0xC0000000 u-boot.img - # mmc dev 1 - # part start mmc 1 1 partstart - # mmc write ${fileaddr} ${partstart} ${filesize} - -To boot from eMMC, select BootPinMode = 0 1 0 and reset. - -9. MAC Address -============== - -Please read doc/README.enetaddr for the implementation guidelines for mac id -usage. Basically, environment has precedence over board specific storage. - -For STMicroelectonics board, it is retrieved in STM32MP15x otp : -- OTP_57[31:0] = MAC_ADDR[31:0] -- OTP_58[15:0] = MAC_ADDR[47:32] - -To program a MAC address on virgin OTP words above, you can use the fuse command -on bank 0 to access to internal OTP: - - Prerequisite: check if a MAC address isn't yet programmed in OTP - - 1- check OTP: their value must be equal to 0 - - STM32MP> fuse sense 0 57 2 - Sensing bank 0: - Word 0x00000039: 00000000 00000000 - - 2- check environment variable - - STM32MP> env print ethaddr - ## Error: "ethaddr" not defined - - Example to set mac address "12:34:56:78:9a:bc" - - 1- Write OTP - STM32MP> fuse prog -y 0 57 0x78563412 0x0000bc9a - - 2- Read OTP - STM32MP> fuse sense 0 57 2 - Sensing bank 0: - Word 0x00000039: 78563412 0000bc9a - - 3- next REBOOT : - ### Setting environment from OTP MAC address = "12:34:56:78:9a:bc" - - 4 check env update - STM32MP> env print ethaddr - ethaddr=12:34:56:78:9a:bc - -warning:: This MAC address provisioning can't be executed twice on the same - board as the OTP are protected. It is already done for the board - provided by STMicroelectronics. - -10. Coprocessor firmware -======================== - -U-Boot can boot the coprocessor before the kernel (coprocessor early boot). - -A/ Manuallly by using rproc commands (update the bootcmd) - Configurations - # env set name_copro "rproc-m4-fw.elf" - # env set dev_copro 0 - # env set loadaddr_copro 0xC1000000 - - Load binary from bootfs partition (number 4) on SDCard (mmc 0) - # ext4load mmc 0:4 ${loadaddr_copro} ${name_copro} - => ${filesize} updated with the size of the loaded file - - Start M4 firmware with remote proc command - # rproc init - # rproc load ${dev_copro} ${loadaddr_copro} ${filesize} - # rproc start ${dev_copro} - -B/ Automatically by using FIT feature and generic DISTRO bootcmd - - see examples in this directory : - - Generate FIT including kernel + device tree + M4 firmware - with cfg with M4 boot - $> mkimage -f fit_copro_kernel_dtb.its fit_copro_kernel_dtb.itb - - Then using DISTRO configuration file: see extlinux.conf to select - the correct configuration - => stm32mp157c-ev1-m4 - => stm32mp157c-dk2-m4 - -11. DFU support -=============== - -The DFU is supported on ST board. -The env variable dfu_alt_info is automatically build, and all -the memory present on the ST boards are exported. - -The mode is started by - -STM32MP> dfu 0 - -On EV1 board: - -STM32MP> dfu 0 list - -DFU alt settings list: -dev: RAM alt: 0 name: uImage layout: RAM_ADDR -dev: RAM alt: 1 name: devicetree.dtb layout: RAM_ADDR -dev: RAM alt: 2 name: uramdisk.image.gz layout: RAM_ADDR -dev: eMMC alt: 3 name: sdcard_fsbl1 layout: RAW_ADDR -dev: eMMC alt: 4 name: sdcard_fsbl2 layout: RAW_ADDR -dev: eMMC alt: 5 name: sdcard_ssbl layout: RAW_ADDR -dev: eMMC alt: 6 name: sdcard_bootfs layout: RAW_ADDR -dev: eMMC alt: 7 name: sdcard_vendorfs layout: RAW_ADDR -dev: eMMC alt: 8 name: sdcard_rootfs layout: RAW_ADDR -dev: eMMC alt: 9 name: sdcard_userfs layout: RAW_ADDR -dev: eMMC alt: 10 name: emmc_fsbl1 layout: RAW_ADDR -dev: eMMC alt: 11 name: emmc_fsbl2 layout: RAW_ADDR -dev: eMMC alt: 12 name: emmc_ssbl layout: RAW_ADDR -dev: eMMC alt: 13 name: emmc_bootfs layout: RAW_ADDR -dev: eMMC alt: 14 name: emmc_vendorfs layout: RAW_ADDR -dev: eMMC alt: 15 name: emmc_rootfs layout: RAW_ADDR -dev: eMMC alt: 16 name: emmc_userfs layout: RAW_ADDR -dev: MTD alt: 17 name: nor_fsbl1 layout: RAW_ADDR -dev: MTD alt: 18 name: nor_fsbl2 layout: RAW_ADDR -dev: MTD alt: 19 name: nor_ssbl layout: RAW_ADDR -dev: MTD alt: 20 name: nor_env layout: RAW_ADDR -dev: MTD alt: 21 name: nand_fsbl layout: RAW_ADDR -dev: MTD alt: 22 name: nand_ssbl1 layout: RAW_ADDR -dev: MTD alt: 23 name: nand_ssbl2 layout: RAW_ADDR -dev: MTD alt: 24 name: nand_UBI layout: RAW_ADDR -dev: VIRT alt: 25 name: OTP layout: RAW_ADDR -dev: VIRT alt: 26 name: PMIC layout: RAW_ADDR - -All the supported device are exported for dfu-util tool: - -$> dfu-util -l -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=26, name="PMIC", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=25, name="OTP", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=24, name="nand_UBI", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=23, name="nand_ssbl2", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=22, name="nand_ssbl1", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=21, name="nand_fsbl", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=20, name="nor_env", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=19, name="nor_ssbl", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=18, name="nor_fsbl2", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=17, name="nor_fsbl1", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=16, name="emmc_userfs", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=15, name="emmc_rootfs", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=14, name="emmc_vendorfs", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=13, name="emmc_bootfs", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=12, name="emmc_ssbl", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=11, name="emmc_fsbl2", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=10, name="emmc_fsbl1", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=9, name="sdcard_userfs", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=8, name="sdcard_rootfs", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=7, name="sdcard_vendorfs", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=6, name="sdcard_bootfs", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=5, name="sdcard_ssbl", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=4, name="sdcard_fsbl2", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=3, name="sdcard_fsbl1", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=2, name="uramdisk.image.gz", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=1, name="devicetree.dtb", serial="002700333338511934383330" -Found DFU: [0483:5720] ver=9999, devnum=99, cfg=1, intf=0, alt=0, name="uImage", serial="002700333338511934383330" - -You can update the boot device: - -#SDCARD -$> dfu-util -d 0483:5720 -a 3 -D tf-a-stm32mp157c-ev1-trusted.stm32 -$> dfu-util -d 0483:5720 -a 4 -D tf-a-stm32mp157c-ev1-trusted.stm32 -$> dfu-util -d 0483:5720 -a 5 -D u-boot-stm32mp157c-ev1-trusted.img -$> dfu-util -d 0483:5720 -a 6 -D st-image-bootfs-openstlinux-weston-stm32mp1.ext4 -$> dfu-util -d 0483:5720 -a 7 -D st-image-vendorfs-openstlinux-weston-stm32mp1.ext4 -$> dfu-util -d 0483:5720 -a 8 -D st-image-weston-openstlinux-weston-stm32mp1.ext4 -$> dfu-util -d 0483:5720 -a 9 -D st-image-userfs-openstlinux-weston-stm32mp1.ext4 - -#EMMC -$> dfu-util -d 0483:5720 -a 10 -D tf-a-stm32mp157c-ev1-trusted.stm32 -$> dfu-util -d 0483:5720 -a 11 -D tf-a-stm32mp157c-ev1-trusted.stm32 -$> dfu-util -d 0483:5720 -a 12 -D u-boot-stm32mp157c-ev1-trusted.img -$> dfu-util -d 0483:5720 -a 13 -D st-image-bootfs-openstlinux-weston-stm32mp1.ext4 -$> dfu-util -d 0483:5720 -a 14 -D st-image-vendorfs-openstlinux-weston-stm32mp1.ext4 -$> dfu-util -d 0483:5720 -a 15 -D st-image-weston-openstlinux-weston-stm32mp1.ext4 -$> dfu-util -d 0483:5720 -a 16 -D st-image-userfs-openstlinux-weston-stm32mp1.ext4 - -#NOR -$> dfu-util -d 0483:5720 -a 17 -D tf-a-stm32mp157c-ev1-trusted.stm32 -$> dfu-util -d 0483:5720 -a 18 -D tf-a-stm32mp157c-ev1-trusted.stm32 -$> dfu-util -d 0483:5720 -a 19 -D u-boot-stm32mp157c-ev1-trusted.img - -#NAND (UBI partition used for NAND only boot or NOR + NAND boot) -$> dfu-util -d 0483:5720 -a 21 -D tf-a-stm32mp157c-ev1-trusted.stm32 -$> dfu-util -d 0483:5720 -a 22 -D u-boot-stm32mp157c-ev1-trusted.img -$> dfu-util -d 0483:5720 -a 23 -D u-boot-stm32mp157c-ev1-trusted.img -$> dfu-util -d 0483:5720 -a 24 -D st-image-weston-openstlinux-weston-stm32mp1_nand_4_256_multivolume.ubi - -And you can also dump the OTP and the PMIC NVM with: - -$> dfu-util -d 0483:5720 -a 25 -U otp.bin -$> dfu-util -d 0483:5720 -a 26 -U pmic.bin +see doc/board/st/stm32mp1.rst |