Hi all: I add the support mem based on pm.c in mach-mx23. When ruuing mx28_cpu_suspend in sleep.S, and interrupt should wake up the system, but the system already has been poweroff. What's wrong with me? I test with comand "echo mem > /sys/power/state".
Yes, it is impossible to wakeup powered-off CPU by itself. If you want to support "mem" state (ACPI S3, power off except RAM) literally, you will need a power controller chip which monitors wakeup signal and power the CPU again.
