Hello, > Here's the i2cdump output. > The device only supports 8 registers (0-7), so the output isn't too > surprising. I was waiting if "undefined" registers will alias or something like that but it seems that answer is "no". > AFAIK, this device isn't likely to be on any common motherboard. > Perhaps detection isn't necessary? Maybe Jean can suggest something? We can add it later... Please fix the driver so it works with -mm- kernels and maybe also the alphabetical issue. Then I think it is quite ready. Please next time include greg at kroah.com in your post, he is the official kernel I2C subsystem maintainer. If you want you can create some documentation for the driver. Here is the guide: Common formatting can be found for example here: http://ftp.sh.cvut.cz/MIRRORS/kernel/linux/kernel/people/gregkh/gregkh-2.6/gregkh-02-i2c/i2c-docs-update-2.patch We can add documentation in separate patch. The documentation should reflect the use of syfs files. You can inspire from PCF8574 chip. Thanks, regards Rudolf