[BBBlue] Incomplete Shutdown with Debian12.X Minimal Image and Kernel 5.10.X

[menschel]

Hello,

documenting an Issue I found while comparing behaviour of

https://www.beagleboard.org/distros/am3358-debian-10-3-2020-04-06-4gb-sd-iot

with

https://forum.beagleboard.org/t/debian-12-x-bookworm-monthly-snapshot-2023-10-07/36175

After reworking the device-tree there is one issue in particular that concerns me.
The device does not shutdown completely, the 3V3 stays powed.

Shutdown / Reboot the device via Buttons requires the Sequence.

1. Push Power Button
2. Wait until all USR Leds are off:
   • PWR_LED stays on
   • the RED_LED is glimmering if /delete-property/ ti,pmic-shutdown-controller; line is in DTS file.
3. Push Reset Button
   • All LEDs turn off ( Behaviour of Debian 10.3 Image after only pushing the Power Button.)
4. Push Power Button
   • Device boots.

Means there is something missing in the shutdown sequence.

It would be great with someone with knowledge could comment on that.