From mboxrd@z Thu Jan  1 00:00:00 1970
From: john@jjdev.com (John de la Garza)
Date: Mon, 29 Dec 2014 10:45:28 -0500
Subject: Doubt In Char Drivers
In-Reply-To: <CAHmg6GPMvWOMi08=KN57AmMK7p45VmreoA6GaOsTFwpAZmz8EQ@mail.gmail.com>
References: <CAHmg6GPMvWOMi08=KN57AmMK7p45VmreoA6GaOsTFwpAZmz8EQ@mail.gmail.com>
Message-ID: <20141229154527.GA3752@crux.local>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

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