Questions about Linux USB Serial Gadget driver

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Hello,

I have some issues with USB device driver fort he AT91SAM9263
microcontroller. I'm using Kernel 2.6.38 provided by buildroot 2011.08 and
it work well on the evaluation board (AT91SAM9263-EK) but now I'm facing
problems with my own board design.
As a first step I wanted to force my board to use low speed USB with a
pull-up resistor but that resulted in kernel errors on boot up.

Is there a way to force low speed within the USB serial gadget driver?
Changing "udc->gadget.speed = USB_SPEED_FULL;" to USB_SPEED_LOW within the
IRQ function in at91_udc.c only changed the text shown on console when I
connect the board to a host PC.

Regards
Matthias Wieloch


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