OTP read getting failed

[stack_shailesh]

Hello,

I’m bringing up a custom board based on STM32MP135F and cannot read OTP reg. 
I am using scarthgap based Yocto distribution “openstlinux-6.6-yocto-scarthgap-mpu-v26.06.10”
I modified DTS of TF-A, Optee, u-boot according to my board. File generated from openstlinux-6.1 version, I am able to able to  do read and write operation.

I am able to program EMMC but not able to do OTP read and write. Getting following error on COM port-
optee optee: TA_NVMEM invoke failed TEE err: ffff0006, err:0
Error: OTP read issue -5
dfu_read: Failed to fill buffer

Error Log from ST-programmer CLI-
Error: Read OTP Partition failed
Error: Uploading the OTP structure failed
Error: Initializing the OTP structure failed

Do I need enable any configuration or any build modification for this openstlinux-6.6?

[ozammo]

You must explicitly enable the NVMEM TA and BSEC parameters in your OP-TEE OS build flags.

This should give you all you need!

https://wiki.st.com/stm32mpu/wiki/OP-TEE_OTP_overview

 

 

[stack_shailesh]

Hi Ozammo, 
In yocto build setup, where this should be enabled? as I try to build it, I get error. I made a separate build setup and using following command to try to build-

make -f $PWD/../Makefile.sdk.stm32mp13-rt all OPTEE_CONFIG=opteemin-programmer CFG_EMBED_DTB_SOURCE_FILE="stm32mp135f-dk"  CFG_STM32MP_PROFILE=secure_and_system_services   CFG_BSEC_PTA=y     CFG_STM32_BSEC=y     CFG_STM32_BSEC_WRITE=y CFG_TA_STM32MP_NVMEM=y

but then I have to make changes to some more files as I get error.
If I make required changes in files mk/config.mk to disable CFG_EARLY_TA=n and then I could build optee and fip. But it does not have any impact on build system.

[mƎALLEm]

Hello ​@stack_shailesh

STM32MP135 is a MPU product not a MCU. So you’ve posted this thread in the wrong forum board.

I’m moving it to STM32 MPUs Embedded software and solutions.