I2C子系统

https://www.cnblogs.com/yangjiguang/p/6218724.html

https://blog.csdn.net/lizuobin2/article/details/51694574

总线设备驱动模型：

https://blog.csdn.net/coding__madman/article/details/51428400

设备模型和总线设备驱动

https://blog.csdn.net/zhou_chenz/article/details/54976584