how to interface ade7758 to at91sam9261 using spi

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http://www.linuxquestions.org – am trying to interface ade7758(adc) to at91sam9261...i have written a sample code which registers an spi driver and sends an address to ade7758 and receives a data...every thing is fine.My device is registered but kernel is giving a crash message....below is the message.... pl2303: Prolific PL2303 USB to serial adaptor driver USB Serial support registered for TI USB 3410 1 port adapter USB Serial support registered for TI USB 5052 2 port adapter usbcore: registered new interface driver ti_usb_3410_5052 ti_usb_3410_5052: v0.9:TI USB 3410/5052 Serial Driver udc: at91_udc version 3 May 2006 mi (HowTos)