void device_add_user(struct device_user *dep, struct device *iface);
void device_remove_user(struct device_user *dep);
-void set_device_present(struct device *dev, bool state);
+void device_set_present(struct device *dev, bool state);
int claim_device(struct device *dev);
void release_device(struct device *dev);
int check_device_state(struct device *dev);