it appears as if the itg3200 is always powered on and not in sleep
mode.
There is a patch proposed for 3.12:
http://lists.goldelico.com/pipermail/gta04-owner/2014-September/00586
4.html
but the solution must be adapted for the 3.17 driver. AFAIK, turing
the ITG into sleep mode must be added to
itg3200_write_raw / case IIO_CHAN_INFO_SAMP_FREQ:
What we also should look is if the kernel suspend mechanism does the
same (maybe through the IIO framework?).
Reported by Nikolaus Schaller, Sep 10, 2014