Hi Keshava,

Using current l-o master, I noticed that CORE was not hitting retention
in idle on my 3530/Overo.  CORE hits retention on suspend just fine.

Debugging this, I found that usbtll_fck was still enabled during idle,
thus preventing CORE from hitting retention.

To test, I disabled USB host (CONFIG_MFD_OMAP_USB_HOST=n in .config) and
was then started seeing CORE hit retention in idle again.

I have nothing plugged into the USB host port on this board, so I
would've expected that runtime PM would've kicked in and shutdown this

Any ideas what's going on here?  Is this expected behavior?

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