i2c_dbg
i2c_dbg(2, "i2c attr => %s\n", str_i2c_attr[attr]);
i2c_dbg(2, "i2c reset\n");
i2c_dbg(2, "i2c data => 0x%x\n", data);
i2c_dbg(2, "i2c data <= 0x%x\n", data);
i2c_dbg(2, "start xfer\n");
i2c_dbg(1, "i2c xfer:");
i2c_dbg(2, "send address\n");
i2c_dbg(2, "read bytes\n");
i2c_dbg(2, "write bytes\n");
i2c_dbg(2, "xfer done\n");
i2c_dbg(2, "i2c stat <= %s\n", str_i2c_status[status]);
i2c_dbg(2, "i2c stat => %s\n", str_i2c_status[status]);