i2c_master_recv(9) centos man page | unix.com

I2C_MASTER_RECV(9)					      I2C and SMBus Subsystem						I2C_MASTER_RECV(9)

NAME
       i2c_master_recv - issue a single I2C message in master receive mode

SYNOPSIS
       int i2c_master_recv(const struct i2c_client * client, char * buf, int count);

ARGUMENTS
       client
	   Handle to slave device

       buf
	   Where to store data read from slave

       count
	   How many bytes to read, must be less than 64k since msg.len is u16

DESCRIPTION
       Returns negative errno, or else the number of bytes read.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							I2C_MASTER_RECV(9)