int uclass_bind_device(struct udevice *dev)
{
    struct uclass *uc;
    int ret;

    uc = dev->uclass;
//
    list_add_tail(&dev->uclass_node, &uc->dev_head);

    if (dev->parent) {
        struct uclass_driver *uc_drv = dev->parent->uclass->uc_drv;

        if (uc_drv->child_post_bind) {
            ret = uc_drv->child_post_bind(dev);
            if (ret)
                goto err;
        }
    }

    return 0;
err:
    /* There is no need to undo the parent's post_bind call */
    list_del(&dev->uclass_node);

    return ret;
}