ulpi_check_integrity returning error

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Hi,

I am working on adding USB OTG host support for the mx31_3ds board
(OTG PHY is a ISP1504).

USB OTG in device mode works fine and I can only get OTG host mode to
work if I force a 'return 0' into the ulpi_check_integrity function. I
was wondering if anyone has any suggestions as to where to
inspect/debug the fact that the read/write to the OTG PHY scratch
register does not match.

Thanks,

Fabio Estevam
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