i2c_read_reg
status = i2c_read_reg(sc, off);
srb = i2c_read_reg(sc, I2C_STATUS_REG) & I2CSR_MBB;
sr = i2c_read_reg(sc, I2C_STATUS_REG);
if ((i2c_read_reg(sc, I2C_STATUS_REG) & I2CSR_MBB) == 0) {
if (i2c_read_reg(sc, I2C_STATUS_REG) & I2CSR_MBB) {
i2c_read_reg(sc, I2C_DATA_REG);
reg = i2c_read_reg(sc, I2C_DATA_REG);
status = i2c_read_reg(sc, off);
status = i2c_read_reg(sc, I2C_STATUS_REG);
status = i2c_read_reg(sc, I2C_STATUS_REG);
i2c_read_reg(sc, I2C_DATA_REG);
*buf++ = i2c_read_reg(sc, I2C_DATA_REG);