ADC of Mini2440 displaying random values

Hello Everyone
I am using Mini2440 to develop an application which uses ADC of Mini2440.
I am using Linux Kernel version 2.6.32.2.
For testing I am running 
http://friendlyarm-micro2440.blogspot.in/p/building-qt-projects.html
above application.
I am testing on AIN0.
And all I am getting is Random and Fluctuating values.

I tried "cat dev/adc" then it works fine, values changes according to POT.

I just observed that there is no entry of "s3c24xx-adc" in
sys/devices/platform/

when I tried to run built in application of ADC Convertor present in OS it
just gives -1.

Can anybody provide solution???

Does the kernel require something enabled and re-compiled? The tutorial
should advise.

Be aware that 4 of the ADC inputs are used for the touchscreen, depending
on model of the display

Thank You for Response
I also think so that kernel needs to be modified but i dont know how it has
to be done.
While searching I found that something needs to be done with
"arm/arch/mach-mini2440/mach-mini2440.c" file
You have link to any tutorial?? I searched google but didnt find any useful
one.

http://ebrombaugh.studionebula.com/embedded/mini2440/index.html

but no ADC.  There is a mention that one ADC (I think 4 channels) is
enabled but if you want more then it is a re-compile.  The file you mention
is probably the one that needs modifying.

My collection of mini2440 is in another location.  Maybe in 2 days time I
could find something.

Also the Pengutronix Quickstart guide for their mini2440 BSP might be
useful.

Thank You for the link.
If they say that AIN0 is already enabled in Mini2440, then I dont know I
cant use it in program.
I start my application even before Linux. Will that affect on functionality
of Drivers?

And it'll be great help if you find something out of your Mini2440
collection.

Regards

Some of the ADC channels are enabled for the touchscreen.  I think you
could remove the touchscreen and interface your circuit to those channels. 
Sounds like a big job.

How can you start anything before the kernel is loaded or the root
filesystem?

Can't log into the forum!

Send your email address to dave underscore festing at hotmail dot com and
I'll send you all my ADC stuff.

I mailed you

Check it

Regards

Sent yesterday, did you get it?

I just checked.
Thank you Dave

Regards