严格说，此数据结构不是设备模型中的，它是一个DTS中节点对应的内存中设备描述，一般此
对象代表一个设备。
struct device_node {
const char *name;
const char *type;
phandle phandle;
const char *full_name;
struct fwnode_handle fwnode;struct property *properties;
struct property *deadprops; /* removed properties */
struct device_node *parent;
struct device_node *child;
struct device_node *sibling;
struct kobject kobj;
unsigned long _flags;
void *data;
#if defined(CONFIG_SPARC)
const char *path_component_name;
unsigned int unique_id;
struct of_irq_controller *irq_trans;
#endif
};