i2c_smbus_write_block_data(9) centos man page | unix.com

I2C_SMBUS_WRITE_BLOC(9) 				      I2C and SMBus Subsystem					   I2C_SMBUS_WRITE_BLOC(9)

NAME
       i2c_smbus_write_block_data - SMBus "block write" protocol

SYNOPSIS
       s32 i2c_smbus_write_block_data(const struct i2c_client * client, u8 command, u8 length, const u8 * values);

ARGUMENTS
       client
	   Handle to slave device

       command
	   Byte interpreted by slave

       length
	   Size of data block; SMBus allows at most 32 bytes

       values
	   Byte array which will be written.

DESCRIPTION
       This executes the SMBus "block write" protocol, returning negative errno else zero on success.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   I2C_SMBUS_WRITE_BLOC(9)