mlxsw: reg: Extend MGPIR register with new field exposing the number of QSFP modules

Extend MGPIR - Management General Peripheral Information Register
with new field "num_of_modules" exposing the number of modules
supported by specific system.
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c

@@ -590,7 +590,7 @@ static int mlxsw_hwmon_gearbox_init(struct mlxsw_hwmon *mlxsw_hwmon)
 	if (err)
 		return err;
 
-	mlxsw_reg_mgpir_unpack(mgpir_pl, &gbox_num, NULL, NULL);
+	mlxsw_reg_mgpir_unpack(mgpir_pl, &gbox_num, NULL, NULL, NULL);
 	if (!gbox_num)
 		return 0;
 

drivers/net/ethernet/mellanox/mlxsw/core_thermal.c

@@ -913,7 +913,8 @@ mlxsw_thermal_gearboxes_init(struct device *dev, struct mlxsw_core *core,
 	if (err)
 		return err;
 
-	mlxsw_reg_mgpir_unpack(mgpir_pl, &thermal->tz_gearbox_num, NULL, NULL);
+	mlxsw_reg_mgpir_unpack(mgpir_pl, &thermal->tz_gearbox_num, NULL, NULL,
+			       NULL);
 	if (!thermal->tz_gearbox_num)
 		return 0;
 

drivers/net/ethernet/mellanox/mlxsw/reg.h

@@ -9531,6 +9531,12 @@ MLXSW_ITEM32(reg, mgpir, devices_per_flash, 0x00, 16, 8);
  */
 MLXSW_ITEM32(reg, mgpir, num_of_devices, 0x00, 0, 8);
 
+/* 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)
 {
 	MLXSW_REG_ZERO(mgpir, payload);
@@ -9539,7 +9545,7 @@ static inline void mlxsw_reg_mgpir_pack(char *payload)
 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 *devices_per_flash, u8 *num_of_modules)
 {
 	if (num_of_devices)
 		*num_of_devices = mlxsw_reg_mgpir_num_of_devices_get(payload);
@@ -9548,6 +9554,8 @@ mlxsw_reg_mgpir_unpack(char *payload, u8 *num_of_devices,
 	if (devices_per_flash)
 		*devices_per_flash =
 				mlxsw_reg_mgpir_devices_per_flash_get(payload);
+	if (num_of_modules)
+		*num_of_modules = mlxsw_reg_mgpir_num_of_modules_get(payload);
 }
 
 /* TNGCR - Tunneling NVE General Configuration Register