stm32mp one time programming feature

[WLeun.3]

Hi everyone,

I am using stm32mp157f-dk2 with ecosystem 3.1.

I am interested to store the board information of my future product using the OTP feature

After reading the reference manual, ch3 and 4, I have the following doubt

1. Do I need any extra hardware to program the OTP bit/word? If not, how can I actually program those bit/word?
2. Is it possible to read the OTP information in linux file system? Mapping them as some virtual files for example.
3. What extra information do I need to include in the device tree to enable OTP? I assume the default project didn't include that.

Any suggestions are welcome

Regards,

Leung

@Kevin HUBER​ 

[WLeun.3]

OK, I have come across with this article

https://wiki.st.com/stm32mpu/wiki/How_to_update_OTP_with_U-Boot

It solve my problem (1) and (3)

Only problem (2) remain.

[PatrickF · Accepted solution]

Hi @WLeun.3​ 

Maybe this page could help you for (2): https://wiki.st.com/stm32mpu/wiki/NVMEM_overview

Regards,

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