forced_mode of boot_ctx is always set to 3

[fantasylsdo]

Hello ST team,

I came across issue here.

The force_mode of boot_ctx is always set to 3, which force the MPU to boot over USB, rather than MMC. I tried to set TAMP_BKP20R(BOOT MODE) to 0, but the behavior is the same after reset.

Aslo, I have another board (hardware is slightly different, but boot pin configuration is the same), which works well.

I know it can be fixed by changing UBOOT code. My questions are:

1. Is the value of this register boot_ctx set by ROM code?

2. The MPU model and version of the above two board are the same, STM32MP151FAD Rev.Z. Why is their behavoir different? 

[Olivier GALLIEN]

Hi @fantasylsdo 

One assumption to check 

May you properly delete the configuration of USER1 button in you DT ? 

See description in LEDs and buttons on STM32 MPU boards - stm32mpu 

Hope it help 

Olivier