How to create a driver

---

I need to create a driver. Like those /dev/smd0 and /dev/smd27.
My driver will be very similar to those smd drivers, it will just talk to different smd channel.

My question is: do I have to rebuild the whole source tree, and flash the image to the G1 phone? Or can I just make a driver binary module, and adb push to the phone, and install it (like insmod driver.o)?

Please understand I am a newbie to linux...

You should be able to build just the driver itself, and put it onto the G1 (assuming you have root access). You'll need to use a cross compiler to build the driver. You should be able to use the one included in the android source (in the prebuilt section).

Just out of curiosity, what kind of driver are you building? What's it for?

you could make dev entries with mknod... at least some ..