Doubt In Char Drivers

[John de la Garza]

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