IMX suspend
From Variscite Wiki
Suspend to RAM
This state offers significant power savings as everything in the system is put into a low-power state, except for memory, which is placed into the self-refresh mode to retain its contents.
To suspend to RAM:
$ echo mem > /sys/power/state
Current consumption when suspended
VAR-SOM-MX6 "L" revisions (1GB RAM)
17.2mA with a 3.7V Li-Po
Warning: Only "L" (for Low-power) revisions of VAR-SOM-MX6 can be operated with 3.7V!
DART-MX6
9mA with a 3.7V Li-Po
VAR-DART-6UL
4.5mA with 3.3V