On Mon, Dec 29, 2014 at 12:09:30AM +0530, me storage wrote:

Hi All,

I am following LDD3 for Char Drivers. So we writing a kernel module(char
driver) after that creating a char file which is representation of
Character Device. So my doubt is how we will communicate with real hardware
device let suppose how to communicate with our monitor .
Can any one please explain how we will communicate with real hardware for
read/write calls?

did you see chapter nine?
http://lwn.net/images/pdf/LDD3/ch09.pdf