how to work on GPIO with AT91SAM9263-EK in Linux
 

we are working on AT91SAM9263-EK with Angstrome Linux. We have Fadora 9 on our PC.We are trying to access GPIOs but we are not being able to do.

I was trying to access kernel functions from userland which is bound to fail.

I came to know that i need to write a driver for the leds and
then use the GPIO for blinking them.

Can anybody please provide a step wise procedure for developing that driver and using it to blink the LED.
any sample code would be greatly appreciated.