stm32mp135f trusted vs optee efficiency

[MWoło.2]

Hello, For some time I testing STM32MP135f with 1GHz CPU clocking. I was able to generate optee OpenStLinux but I see a lack of CPU efficiency. I'm curious what is the difference in efficiency between trust and optee. If I use the trusted option the unit will be more efficient?

[Olivier GALLIEN]

Hi @MWoło.2 ,

STM32MP13 only support OP-TEE as a boot scheme 

https://wiki.st.com/stm32mpu/wiki/Boot_chain_overview#STM32MP13_boot_chain

But anyway trusted or OP-tee might not impact CPU efficiency.

Can you elaborate what you are observing ? 

Thanks 

Olivier

[MWoło.2]

Hi Olivier,

The OP-TEE is something new to me. Unfortunately, my efficient problem was related to missing pull-up resistors on one of the I2C.

Finally works well, and I reached the DK2 efficiency.

Thanks for the answer.

BR Michal