I2C核心提供了I2C总线驱动和设备驱动的注册，注销方法，I2C通信方法(”algorithm”)上层的，与具体适配器无关的代码以及探测设备，检测设备地址的上层代码等。 -I2C core provides I2C bus driver and device driver registration, cancellation method, I2C communication method ("algorithm") upper, with the specific adapter-inde