diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_env.c b/drivers/net/ethernet/mellanox/mlxsw/core_env.c
index 8cee3e317a5b..8b4205c098d2 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_env.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_env.c
@@ -1060,12 +1060,12 @@ int mlxsw_env_init(struct mlxsw_core *mlxsw_core, struct mlxsw_env **p_env)
 	u8 module_count;
 	int i, err;
 
-	mlxsw_reg_mgpir_pack(mgpir_pl);
+	mlxsw_reg_mgpir_pack(mgpir_pl, 0);
 	err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mgpir), mgpir_pl);
 	if (err)
 		return err;
 
-	mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL, &module_count);
+	mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL, &module_count, NULL);
 
 	env = kzalloc(struct_size(env, module_info, module_count), GFP_KERNEL);
 	if (!env)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
index f4bc711a16cf..2bc4c4556895 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
@@ -656,13 +656,13 @@ static int mlxsw_hwmon_module_init(struct mlxsw_hwmon *mlxsw_hwmon)
 	u8 module_sensor_max;
 	int i, err;
 
-	mlxsw_reg_mgpir_pack(mgpir_pl);
+	mlxsw_reg_mgpir_pack(mgpir_pl, 0);
 	err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mgpir), mgpir_pl);
 	if (err)
 		return err;
 
 	mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL,
-			       &module_sensor_max);
+			       &module_sensor_max, NULL);
 
 	/* Add extra attributes for module temperature. Sensor index is
 	 * assigned to sensor_count value, while all indexed before
@@ -707,12 +707,13 @@ static int mlxsw_hwmon_gearbox_init(struct mlxsw_hwmon *mlxsw_hwmon)
 	u8 gbox_num;
 	int err;
 
-	mlxsw_reg_mgpir_pack(mgpir_pl);
+	mlxsw_reg_mgpir_pack(mgpir_pl, 0);
 	err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mgpir), mgpir_pl);
 	if (err)
 		return err;
 
-	mlxsw_reg_mgpir_unpack(mgpir_pl, &gbox_num, &device_type, NULL, NULL);
+	mlxsw_reg_mgpir_unpack(mgpir_pl, &gbox_num, &device_type, NULL, NULL,
+			       NULL);
 	if (device_type != MLXSW_REG_MGPIR_DEVICE_TYPE_GEARBOX_DIE ||
 	    !gbox_num)
 		return 0;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
index 65ab04e32972..adb2820430b1 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
@@ -746,13 +746,13 @@ mlxsw_thermal_modules_init(struct device *dev, struct mlxsw_core *core,
 	char mgpir_pl[MLXSW_REG_MGPIR_LEN];
 	int i, err;
 
-	mlxsw_reg_mgpir_pack(mgpir_pl);
+	mlxsw_reg_mgpir_pack(mgpir_pl, 0);
 	err = mlxsw_reg_query(core, MLXSW_REG(mgpir), mgpir_pl);
 	if (err)
 		return err;
 
 	mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL,
-			       &thermal->tz_module_num);
+			       &thermal->tz_module_num, NULL);
 
 	thermal->tz_module_arr = kcalloc(thermal->tz_module_num,
 					 sizeof(*thermal->tz_module_arr),
@@ -837,13 +837,13 @@ mlxsw_thermal_gearboxes_init(struct device *dev, struct mlxsw_core *core,
 	int i;
 	int err;
 
-	mlxsw_reg_mgpir_pack(mgpir_pl);
+	mlxsw_reg_mgpir_pack(mgpir_pl, 0);
 	err = mlxsw_reg_query(core, MLXSW_REG(mgpir), mgpir_pl);
 	if (err)
 		return err;
 
 	mlxsw_reg_mgpir_unpack(mgpir_pl, &gbox_num, &device_type, NULL,
-			       NULL);
+			       NULL, NULL);
 	if (device_type != MLXSW_REG_MGPIR_DEVICE_TYPE_GEARBOX_DIE ||
 	    !gbox_num)
 		return 0;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h
index 5bf8ad32cb8e..f0c90e66aa32 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/reg.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h
@@ -11362,6 +11362,12 @@ enum mlxsw_reg_mgpir_device_type {
 	MLXSW_REG_MGPIR_DEVICE_TYPE_GEARBOX_DIE,
 };
 
+/* mgpir_slot_index
+ * Slot index (0: Main board).
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, mgpir, slot_index, 0x00, 28, 4);
+
 /* mgpir_device_type
  * Access: RO
  */
@@ -11379,21 +11385,29 @@ MLXSW_ITEM32(reg, mgpir, devices_per_flash, 0x00, 16, 8);
  */
 MLXSW_ITEM32(reg, mgpir, num_of_devices, 0x00, 0, 8);
 
+/* mgpir_num_of_slots
+ * Number of slots in the system.
+ * Access: RO
+ */
+MLXSW_ITEM32(reg, mgpir, num_of_slots, 0x04, 8, 8);
+
 /* mgpir_num_of_modules
  * Number of modules.
  * Access: RO
  */
 MLXSW_ITEM32(reg, mgpir, num_of_modules, 0x04, 0, 8);
 
-static inline void mlxsw_reg_mgpir_pack(char *payload)
+static inline void mlxsw_reg_mgpir_pack(char *payload, u8 slot_index)
 {
 	MLXSW_REG_ZERO(mgpir, payload);
+	mlxsw_reg_mgpir_slot_index_set(payload, slot_index);
 }
 
 static inline void
 mlxsw_reg_mgpir_unpack(char *payload, u8 *num_of_devices,
 		       enum mlxsw_reg_mgpir_device_type *device_type,
-		       u8 *devices_per_flash, u8 *num_of_modules)
+		       u8 *devices_per_flash, u8 *num_of_modules,
+		       u8 *num_of_slots)
 {
 	if (num_of_devices)
 		*num_of_devices = mlxsw_reg_mgpir_num_of_devices_get(payload);
@@ -11404,6 +11418,8 @@ mlxsw_reg_mgpir_unpack(char *payload, u8 *num_of_devices,
 				mlxsw_reg_mgpir_devices_per_flash_get(payload);
 	if (num_of_modules)
 		*num_of_modules = mlxsw_reg_mgpir_num_of_modules_get(payload);
+	if (num_of_slots)
+		*num_of_slots = mlxsw_reg_mgpir_num_of_slots_get(payload);
 }
 
 /* MFDE - Monitoring FW Debug Register