i2c_smbus_xfer (9)

s32 i2c_smbus_xfer(struct i2c_adapter * adapter, u16 addr, unsigned short flags, char read_write, u8 command, int protocol, union i2c_smbus_data * data);

adapter

Handle to I2C bus

addr

Address of SMBus slave on that bus

flags

I2C_CLIENT_* flags (usually zero or I2C_CLIENT_PEC)

read_write

I2C_SMBUS_READ or I2C_SMBUS_WRITE

command

Byte interpreted by slave, for protocols which use such bytes

protocol

SMBus protocol operation to execute, such as I2C_SMBUS_PROC_CALL

data

Data to be read or written

This executes an SMBus protocol operation, and returns a negative errno code else zero on success.