Re: [PATCH 0/4] stm32: add support for STM32MP25 BSEC to control OTP data

[Alexandre TORGUE]

Hi

On 11/17/23 15:33, Patrick Delaunay wrote:
> Non volatile memory area is available on STM32MP25 with OTP in BSEC.
>
> The 12 Kbits of OTP (effective) for STM32MP25x SoC Family
> are organized into the following regions:
> - lower OTP (OTP0 to OTP127) = 4096 lower OTP bits,
>    bitwise (1-bit) programmable
> - mid OTP (OTP128 to OTP255) = 4096 middle OTP bits,
>    bulk (32-bit) programmable
> - upper OTP (OTP256 to OTP383) = 4096 upper OTP bits,
>    bulk (32-bit) programmable,
>    only accessible when BSEC is in closed state.
>
> BSEC is only accessible by secure world, so the OTP access is done
> by driver with OP-TEE TA, as on STM32MP13x family.
>
>
>
> Patrick Delaunay (4):
>    dt-bindings: nvmem: add new stm32mp25 compatible for stm32-romem
>    nvmem: stm32: add support for STM32MP25 BSEC to control OTP data
>    arm64: defconfig: enable NVMEM STM32 ROMEM for stm32mp25
>    nvmem: add bsec support to stm32mp25
>
>   .../bindings/nvmem/st,stm32-romem.yaml           |  1 +
>   arch/arm64/boot/dts/st/stm32mp251.dtsi           | 16 ++++++++++++++++
>   arch/arm64/configs/defconfig                     |  1 +
>   drivers/nvmem/stm32-romem.c                      | 16 ++++++++++++++++
>   4 files changed, 34 insertions(+)


patch[4] (DT) applied on stm32-next.

thanks
Alex