diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h
index 03ef975a37e4..b8a236872fea 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/reg.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h
@@ -11386,6 +11386,12 @@ MLXSW_ITEM32(reg, mgpir, devices_per_flash, 0x00, 16, 8);
  */
 MLXSW_ITEM32(reg, mgpir, num_of_devices, 0x00, 0, 8);
 
+/* max_modules_per_slot
+ * Maximum number of modules that can be connected per slot.
+ * Access: RO
+ */
+MLXSW_ITEM32(reg, mgpir, max_modules_per_slot, 0x04, 16, 8);
+
 /* mgpir_num_of_slots
  * Number of slots in the system.
  * Access: RO