About Pierre-Loup

Pierre-Loup · 2024-10-11

Hi,I work on a custom board using a DHCOR SoM with a STM32MP157C SoC. I setup the TF-A + OP-TEE boot chain for the secure boot and I managed to boot on the linux stm32 (v6.1). The board hangs at reboot :[ 1480.467975] reboot: Restarting systemI/TC: F...

Pierre-Loup · 2024-12-11

Yes, I just inverted. Vccq => Vdd/Buck3, and Vcc => V3v3/Buck4.

Pierre-Loup · 2024-12-11

I thought the same thing.I think the best solution is to change the Vccq power supply to Vdd/Buck4 for our next board revision. At this time, enabling eMMC RSTn is a workaround.Thanks a lot for your help,Regards

Pierre-Loup · 2024-12-11

Thanks for your explanation,I have read the MB1263 eMMC shematic. The Vcc is connected to V3v3/Buck4, and Vccq to Vdd/Buck4. Since the latter is masked to avoid power cycles, only the Vcc is powered-down during NRST toggling. According to the JEDEC p...

Pierre-Loup · 2024-12-10

Thanks for your answer, I want to know what I am doing to avoid side effects.So, if I understand your graph correctly, an RST_n signal occurs at boot time, but not initiated by the ROM code ?As you said, maybe it is optional but required for our eMMC...

Pierre-Loup · 2024-12-10

Hi,I solved my issue. Is not related with linux stm and secure boot chain.Our SoC revision is Rev.Z. Our custom board is based on the avenger96 (Rev.B) with the same eMMC (SDINBD4-8G), but the RST pin schematic is a bit different. We use discrete com...

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STM32MP15, cannot reboot in secure mode (TZEN = 1)

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Re: STM32MP15, cannot reboot in secure mode (TZEN = 1)

Re: STM32MP15, cannot reboot in secure mode (TZEN = 1)