Closed
Description
Following up on the issue in #2866, the "backup domain" causes issues with low speed oscillators if it does not have write access enabled. This low power domain write access has now been enabled for the F4 family, but the F7 and H7 were skipped as they have different register settings.
This should ideally be solved by moving ALL of the low power oscillator setup code from port.c to the peripherals directory. The HAL RCC setup functions already in use there will handle these low level register differences automatically, if they are passed LSE settings.