Just to be sure: You are using upstream TF-A right, not ST's fork?We have barebox with v2.4 TF-A working here, but without using ETZPC.My guess would be that while you unlock the i2c peripheral, rcc (clock and reset controller) remains exclusive to T...

What happens if you boot Linux afterwards? Can it access i2c4?The other boards supported upstream in barebox use the stpmic on i2c4, so this works in general. What's different at your side is secure-status. Does this perhaps mean that the peripheral ...