Subject i2c and gpio I need an i2c driver for plan9, anyone implemented one in the past and have opinions on what they should look like?
I have to revisit some old code but I wrote a driver for another OS which implemeted 255 virtual files in /dev/i2c/* one for each possible address (well there are some reserved ones but you get the idea). I need GPIO pins too. again in OSs passim I just had a file per pin, no clever magical mapping of bits into integers. I then allowed a write to reconfigure the port as an output, or a read to set it as an input; the I/O config being persistent. This worked well for us but perhaps is naive? Thoughts anyone? -Steve
