I've seen in the linux device tree for RPi that the GPIO35 seem to indicate low voltage in case the RPi is driven by battery.
Is this GPIO also mapped to low voltage indication in baremetal?
If this is not the case, is there any way to detect voltage drops or to retrieve voltage levels the RPi is running with in baremetal?
I've seen some mailbox property messages with respect to voltage but I guess they are to retrieve and configure the voltage levels for different peripherals.
Any idea on how to retrieve this in bare metal would be much appreciated.
Thx in advance.