> C2 port implements a two wire serial communication protocol (bit
> banging) designed to enable in-system programming, debugging, and
> boundary-scan testing on low pin-count Silicon Labs devices.
>
> Main references are at Silicon Laboratories site:
>
> * AN127: FLASH Programming via the C2 Interface
>
http://www.silabs.com/public/documents/tpub_doc/anote/Microcontrollers/Small_Form_Fact...
>
> * C2 Specification
>
http://www.silabs.com/public/documents/tpub_doc/spec/Microcontrollers/en/C2spec.pdf
>
> Currently this code supports only flash programming through sysfs
> interface but extensions shoud be easy to add.
>
> I know that this (proposal) patch may be incomplete but I'd like to
> know what you are thinking about it before continuing further. For example
> I'd like to know if should I put the C2 port core here or into proper
> subdirectory of linux/drivers/misc/ where clients can be placed also.