I am a bit new to Linux device drivers, been doing some research and trying things out. (Read Linux Device Drivers Book, digging around forums). So I have found ati2caddress 0x38 a chip which I would like to talk to. There is already a driver in place for that chip. I have the spec sheet in hand for that chip as well. However, the device shows up under /proc/bus and in the devices file. How can I access this device and send it information? My only other experience is opening a file under /dev/DEVICE and read and write bytes to it, any suggestions would be greatly appreciated. So I checked global errno and it is 9, which is bad file descriptor, any ideas?
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