谈到在linux 系统下编写 I2C 驱动，目前主要有两种方式，一种是把I2C 设备当作一个普通的字符设备来处理，另一种是利用 linux I2C 驱动体系结构来完成。下面比较下这两种驱动。-Speaking at the linux system to prepare I2C driver, there are mainly two ways, one is to I2C devices as an ordinary character device to handle, and the ot