I am using both the i2c-0 and i2c-1 busses on my raspberry pi compute module 3.
I can use i2c-1 no problem. Full comms, can probe the line and see good signals, get good signals back and the good old
i2cdetect -y 1 command gives the expected response for the addresses used.
I then set up i2c-0. The raspi-config is already enabled (from the i2c-1 bus) and the /etc/modules file already has the line i2c-dev. I then create the required file at /dev/i2c-0. But then when I attempt
i2cdetec -y 1 gives the error:
Error: Could not get the adaptor functionality matrix: Inappropriate ioct1 for device
Have I forgotten some important step in setting up the i2c bus? Or have I missed something important in the datasheet which stops me using i2c-0 bus?
EDIT: This is on a Raspberry Pi compute module 3 (standard, not the lite version) and we're running Raspbian Stretch.