uboot uclass和uclass_driver

struct uclass {
         void*priv;
         structuclass_driver *uc_drv;
         structlist_head dev_head;
         structlist_head sibling_node;
};
struct uclass_driver {
         constchar *name;
         enumuclass_id id;
         int(*post_bind)(struct udevice *dev);
         int(*pre_unbind)(struct udevice *dev);
         int(*pre_probe)(struct udevice *dev);
         int(*post_probe)(struct udevice *dev);
         int(*pre_remove)(struct udevice *dev);
         int(*child_post_bind)(struct udevice *dev);
         int(*child_pre_probe)(struct udevice *dev);
         int(*init)(struct uclass *class);
         int(*destroy)(struct uclass *class);
         intpriv_auto_alloc_size;
         intper_device_auto_alloc_size;
         intper_device_platdata_auto_alloc_size;
         intper_child_auto_alloc_size;
         intper_child_platdata_auto_alloc_size;
         constvoid *ops;
         uint32_tflags;
};