static ssize_t dev_show_devspec(struct device *dev, char *buf)
static ssize_t dev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
static ssize_t dev_show_devspec(struct device *dev, char *buf){	struct of_device *ofdev;	ofdev = to_of_device(dev);	return sprintf(buf, "%s", ofdev->node->full_name);}