Hi. I created a replacement kernel for the Nexus 7. Together with a USB Y-cable, this mod enables charging the N7, while running the device in USB host mode. People are using this to operate N7 + USB DAC devices in their cars and other things. It's a fun project.

I'm currently trying to solve an issue with slave devices not being detectable after a sudden power loss. Slave devices will restart, when external power comes back, but will be "not accepting address xx, error -71". Would it make sense to try to back port some code from a newer versions of ehci-hcd.c, including ehci_suspend() and ehci_resume(), not existing in the 3.1.10 kernel of the N7?

Thanks a lot.
Timur

"Can you charge & USB Host mode simultaneously?"
http://rootzwiki.com/forum/512-nexus-7

Project on github:
http://mehrvarz.github.com/usb-host-mode-power-management-nexus7

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