Macro used to list an i2c device and its address
I2C_BOARD_INFO(dev_type, dev_addr);
dev_type
identifies the device type
dev_addr
the device's address on the bus.
This macro initializes essential fields of a struct i2c_board_info, declaring what has been provided on a particular board. Optional fields (such as associated irq, or device-specific platform_data) are provided using conventional syntax.