We're building a custom board with a no-standard power sequence.
The processor and a TCA6418 GPIO expander come up first on a low-current 1V8 supply. The TCA6418 controls the enable pins for all the power regulators in the system, including the high-current 1V8 that powers the rest of the devices connected to the processor.
So order of initialization will be:
Is it possible to do this using just the priority levels in the drivers?