static struct class *timed_output_class;

timed_output_class = class_create(THIS_MODULE, "timed_output");  //会在sys/class/timed_output，会创建class节点。

device_create(timed_output_class, NULL,  MKDEV(0, tdev->index), NULL, "%s", tdev->name); //会在这个class下面创建一个名字是tdev->name的节点，是叫vibrator,所以完整节点路径是sys/class/timed_output/vibrator

 

static struct timed_output_dev mtk_vibrator = {

 .name = "vibrator",

 .get_time = vibrator_get_time,

 .enable = vibrator_enable,

};