Help Crash GPIO43

jossvall

Hello community

I hope you are all doing well.

I'm reaching out to you regarding the following issue:

I currently have approximately 500 devices running OpenWRT version 18. We are working on updating to version 23.05, and I've already completed this process, generating the image with the custom programs.

During testing, I've encountered very strange behavior. Pin 43 (GPIO) is used to activate the PMIC of a modem.

When the modem boots with the system, everything works (while the system LED is blinking). However, if the modem needs to be restarted after the system boots, the Omega 2SP suddenly shuts down. There is no serial output indicating a power-off; everything simply shuts down, as if the power were disconnected internally.

This doesn't happen with version 18, only with version 23. Can anyone help me with this?

NOTE:

Perform the test using echo 1 > /sys/class/gpio/gpio43/value

If I type 0 there is no problem, but if I type 1 the card shuts down abruptly. However, this only happens when the system has booted and the system LED is on.

jossvall

Update on this issue.

I see that the problem isn't with pin 43. I've already tested pins 36 and 14, and the same thing happens. When I try to enable the modem's voltage regulator, the Omega turns off. Ironically, this doesn't happen with version 18. What did they break on the way to version 23?