DEvice Driver Development

I am using Mini2440 and Tiny6410.Now i need to learn and develop device
driver for these Boards.Is there any good material available ?

I am  (Beginner in Linux )using Mini2440 and Tiny6410.Now i would like to
learn and develop device
driver for these Boards.Is there any good material available ?

I dont think so you can find anything good about these boards. Develpoing
Device Drivers in Linux is a complicated process and usually it takes a
team to do that. Why would you want to do that anyway? There are lots of
drivers for these boards and you dont need to do that by yourself.
You can learn how to use them, how to customize them with kernel, how to
enable them, how to modify them (on some limited levels for example making
driver for ADC1 based on ADC0 driver) and stuff like that.