On Mon, Jun 25, 2012 at 07:39:25PM +0530, Dharam Kumar wrote:

Hi,
I'm working on a module which is an input device and hence it needs to
report certain key events.

While browsing through the <linux/input.h>, I did find most of the
key-codes(which I need to use) already defined but not all.

Few of the KEY_xxx which i could not find are:

a.) A Key for going to the previous channel.

I believe that's what this one is intended for:

#define KEY_PREVIOUS            0x19c

b.) Keys for Moving upper-right, lower-right, upper-left and
lower-left direction(probably a GUI(or a grid of icons),where you move
diagonally)

Sounds a bit like joystick functionality, which already exists.

d.) A key for Subpicture (this 'subpicture' key is defined in CEA-931C).

Could have sworn there was a picture-in-picture button, which may or may
not be the same thing, but I don't see it now...

-- 
Jarod Wilson
jarod@redhat.com