diff --git a/drivers/regmap/regmap.c b/drivers/regmap/regmap.c
index 4aa85e9e8f..0652382741 100644
--- a/drivers/regmap/regmap.c
+++ b/drivers/regmap/regmap.c
@@ -377,6 +377,11 @@ void regmap_exit(FAR struct regmap_s *map)
       nxmutex_destroy(&map->mutex[0]);
     }
 
+  if (map->bus->exit != NULL)
+    {
+      map->bus->exit(map->bus);
+    }
+
   kmm_free(map->bus);
   kmm_free(map);
 }
diff --git a/include/nuttx/regmap/regmap.h b/include/nuttx/regmap/regmap.h
index f3b3f02823..b56ec3f9ce 100644
--- a/include/nuttx/regmap/regmap.h
+++ b/include/nuttx/regmap/regmap.h
@@ -57,6 +57,10 @@ typedef CODE int (*write_t)(FAR struct regmap_bus_s *bus,
                             FAR const void *data,
                             unsigned int count);
 
+/* Resources destroyed. */
+
+typedef CODE void (*exit_t)(FAR struct regmap_bus_s *bus);
+
 /* Description of a hardware bus for the register map infrastructure. */
 
 struct regmap_bus_s
@@ -65,6 +69,7 @@ struct regmap_bus_s
   reg_write_t reg_write;
   read_t  read;
   write_t write;
+  exit_t  exit;
 };
 
 /* Configuration for the register map of a device.