show_temp_label
SENSOR_TEMPLATE(temp_label, "temp%d_label", S_IRUGO, show_temp_label, NULL, 0);
SENSOR_TEMPLATE(temp_label, "temp%d_label", 0444, show_temp_label, NULL, 0);
static DEVICE_ATTR(temp1_label, S_IRUGO, show_temp_label, NULL);