[AKSF_Ackermann]

Apple's PSCI interface is not a mystery, and there is perfect knowledge on how it is implemented. It isn't. Which is the actual problem, Linux wants PSCI, Apple platforms do not have it.

[bigyabai]

Case in point. Devicetree drivers make this much harder than ACPI (say what you will about ACPI) and there's no documentation that fills the gap.