i2c(6)_i2c_driver

i2c_register_driver
    // driver register
    driver->driver.owner = owner;
    driver->driver.bus = &i2c_bus_type;
    driver_register(&driver->driver);
    /*
	 * 对i2c_bus上所有的device都执行__process_new_driver(call driver->detect && driver->attach_adapter)
	 */
    i2c_for_each_dev(driver, __process_new_driver);	// (data, fn)
        bus_for_each_dev(&i2c_bus_type, NULL, data, fn);
            // 从i2c_bus取出device
            while ((dev = next_device(&i)) && !error)
                error = fn(dev, data);
        // call driver->detect && driver->attach_adapter
        __process_new_driver
            i2c_do_add_adapter(data, to_i2c_adapter(dev));
                // 1st: driver->detect
                i2c_detect(adap, driver);
                    if (!driver->detect || !address_list)
                        return 0;
                    /* 对address_list[]中的所有address都进行i2c_detect_address */
                    for (i = 0; address_list[i] != I2C_CLIENT_END; i += 1) {
                        temp_client->addr = address_list[i];
                        // 先call driver->detect，成功则i2c_new_device
                        err = i2c_detect_address(temp_client, driver);
                            // 1st: call driver->detect
                            info.addr = addr;
                            err = driver->detect(temp_client, &info);
                            // 2nd: i2c_new_device
                            client = i2c_new_device(adapter, &info);
                            list_add_tail(&client->detected, &driver->clients);
                        if (unlikely(err))
                            break;
                    }
                // 2nd: driver->attach_adapter
                driver->attach_adapter(adap)