Broadcom BCM2835 I2C controller

modulename: i2c-bcm2835.ko

configname: CONFIG_I2C_BCM2835

Linux Kernel Configuration
└─>Device Drivers
└─>I2C support
└─>I2C Hardware Bus support
└─>Broadcom BCM2835 I2C controller
In linux kernel since version 3.1 (release Date: 2011-10-24)  
If you say yes to this option, support will be included for the
BCM2835 I2C controller.

If you don't know what to do here, say N.

This support is also available as a module. If so, the module
will be called i2c-bcm2835.

source code:
drivers/i2c//busses//i2c-bcm2835.c