diff --git a/drivers/mca/mca-bus.c b/drivers/mca/mca-bus.c
index a70fe00..67b8e94 100644
--- a/drivers/mca/mca-bus.c
+++ b/drivers/mca/mca-bus.c
@@ -48,18 +48,24 @@
 	struct mca_device *mca_dev = to_mca_device (dev);
 	struct mca_driver *mca_drv = to_mca_driver (drv);
 	const unsigned short *mca_ids = mca_drv->id_table;
-	int i;
+	int i = 0;
 
-	if (!mca_ids)
-		return 0;
-
-	for(i = 0; mca_ids[i]; i++) {
-		if (mca_ids[i] == mca_dev->pos_id) {
-			mca_dev->index = i;
-			return 1;
+	if (mca_ids) {
+		for(i = 0; mca_ids[i]; i++) {
+			if (mca_ids[i] == mca_dev->pos_id) {
+				mca_dev->index = i;
+				return 1;
+			}
 		}
 	}
-
+	/* If the integrated id is present, treat it as though it were an
+	 * additional id in the id_table (it can't be because by definition,
+	 * integrated id's overflow a short */
+	if (mca_drv->integrated_id && mca_dev->pos_id ==
+	    mca_drv->integrated_id) {
+		mca_dev->index = i;
+		return 1;
+	}
 	return 0;
 }
 
diff --git a/drivers/mca/mca-driver.c b/drivers/mca/mca-driver.c
index 2223466..32cd39b 100644
--- a/drivers/mca/mca-driver.c
+++ b/drivers/mca/mca-driver.c
@@ -36,12 +36,25 @@
 		mca_drv->driver.bus = &mca_bus_type;
 		if ((r = driver_register(&mca_drv->driver)) < 0)
 			return r;
+		mca_drv->integrated_id = 0;
 	}
 
 	return 0;
 }
 EXPORT_SYMBOL(mca_register_driver);
 
+int mca_register_driver_integrated(struct mca_driver *mca_driver,
+				   int integrated_id)
+{
+	int r = mca_register_driver(mca_driver);
+
+	if (!r)
+		mca_driver->integrated_id = integrated_id;
+
+	return r;
+}
+EXPORT_SYMBOL(mca_register_driver_integrated);
+
 void mca_unregister_driver(struct mca_driver *mca_drv)
 {
 	if (MCA_bus)
diff --git a/include/linux/mca.h b/include/linux/mca.h
index 5cff292..3797270 100644
--- a/include/linux/mca.h
+++ b/include/linux/mca.h
@@ -94,6 +94,7 @@
 struct mca_driver {
 	const short		*id_table;
 	void			*driver_data;
+	int			integrated_id;
 	struct device_driver	driver;
 };
 #define to_mca_driver(mdriver) container_of(mdriver, struct mca_driver, driver)
@@ -125,6 +126,7 @@
 extern struct bus_type mca_bus_type;
 
 extern int mca_register_driver(struct mca_driver *drv);
+extern int mca_register_driver_integrated(struct mca_driver *, int);
 extern void mca_unregister_driver(struct mca_driver *drv);
 
 /* WARNING: only called by the boot time device setup */