I have a i.MX28 EVK Rev. D board. I need the USB OTG port to operate as a device. I initially want to have this work as a mass storage device using part of the SD card. Eventually, I'd like to make this a composite device (Mass Storage and Communications). I have Linux L188.8.131.52 loaded on the board. I've followed the instructions concerning configuring LTIB for USB in Ch. 24 of the "i.MX28 EVK Linux" manual. I get errors as displayed in the attachment when I bring up the board. I don't know what it means, but it doesn't look good for USB! I don't think the PC enumerates the USB port when I plug it in. What else do I need to do, besides properly configuration of the kernel, to get USB up and working? I'm just not sure where to start. What code do I need to write to use the built in Linux USB Gadget drivers, or how do I configure them? Any input would be appreciated.