i2c_transfer(9) suse man page | unix.com

I2C_TRANSFER(9) 					      I2C and SMBus Subsystem						   I2C_TRANSFER(9)

NAME
       i2c_transfer - execute a single or combined I2C message

SYNOPSIS
       int i2c_transfer(struct i2c_adapter * adap, struct i2c_msg * msgs, int num);

ARGUMENTS
       adap
	   Handle to I2C bus

       msgs
	   One or more messages to execute before STOP is issued to terminate the operation; each message begins with a START.

       num
	   Number of messages to be executed.

DESCRIPTION
       Returns negative errno, else the number of messages executed.

       Note that there is no requirement that each message be sent to the same slave address, although that is the most common model.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							   I2C_TRANSFER(9)