[U-Boot] ofnode -> udevice question

[Adam Ford]

I am trying to improve the OMAP EHCI driver.  Currently, I pushed a
pending patch which loads a USB host controller device which contains
several child nodes.

We search the child nodes to find the compatible flag, then grab the
address of that node and initialize the corresponding EHCI controller.
I do this because we need some of the info from the parent combined
with data from the child to work.

What I'm trying to do is enhance the feature to support a nop-phy, but
to get the phy, I call generic_phy_get_by_index(struct udevice *,...)
where dev points to the parent and not the child.

I have an ofnode pointing to the child, but I need to somehow convert
the ofnode to a udevice so the phy_get_by_index can search the correct
location for the phy list.  Any suggestions?

My origin patch lacking the phy reference is located:
https://patchwork.ozlabs.org/patch/1125016/

adam