m44miri 
How can i register of devices at linux.can you introduce a document about this?
register of devices
davef
If you mean how can I make my development board be aware of peripheral devices, I think the /arch/arm/mach-s3c2440/mach-mini2440.c is the current way to do it. Documents related to <writing linux kernel device drivers> might help.
m44miri
Your mean is this?: http://www.amazon.com/Writing-Linux-Device-Drivers-exercises/dp/1448672384 or another book.can you get me a link for this book?