Making a file descriptor for I2C

Hi,
 
First off I'd like to mention that I know a lot more about hardware than
I do about software, and I'm stuck trying to figure out some Linux
related issues.  My goal is to have a very portable I2C device that I
can use to send/receive data on an I2C bus, and later to do some more
advanced things.
 
I have an iPaq 5550 with Linux installed (distro is Familiar 0.8.2).  It
has the PXA255, which means that it also has an I2C bus.  I opened it up
and found that the I2C bus seems to be used only to handle an A/V ASIC:
if I were a betting man, I'd say it's used to send Analog-to-Digital
conversion samples back to the XScale, since the iPaq does have an
ambient light sensor.  Anyway, I managed to solder wires from the I2C
bus to two unused pins on the cradle connector.  This concludes the part
of the project where I have expertise.
 
Some digging has revealed that there are I2C object files at
/lib/2.4.19-rmk6-pxa1-hh37/kernel/drivers/i2c/.
These are: 
i2c-adap-pxa.o
i2c-core.o
i2c-algo-pxa.o
 
These are the standard i2c library files, and I'm very glad that they
exist already in the distribution.  But I need to get some file
descriptors (FIFOs) in the /dev/ folder such as /dev/i2c-0, /dev/i2c-1,
etc.  I'm looking for some guidance in regard to this task.  I've looked
around the internet, but I don't think I have the lingo down to the
point where I can get started.
 
 
 
Thanks,
JP Norair
[email protected]
321-723-4985 x111
 
Proximities, Inc.
1335 Gateway Dr.
Suite 2005
Melbourne, FL 32901

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