Dear RIOTers,
As of today start the embargo regarding I2C. All PR’s related to I2C device or CPU drivers, new I2C board support etc. will be postponed for up to 2 weeks.
A dedicated branch has been created (new_i2c_if) based on the lastest master.
If you’re willing to participate, don’t hesitate 
There is a synchronization effort on this issue #6577 (the complete list is now up-to-date).
Cheers !