wifi: iwlwifi: add new RF support for wifi7

Add the support for new RF based on step-id.
Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20231011130030.d902aa8cfd1b.I7c7b357ba41c00015d6c6255b45b3d17549948f0@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-csr.h

 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
 /*
- * Copyright (C) 2005-2014, 2018-2022 Intel Corporation
+ * Copyright (C) 2005-2014, 2018-2023 Intel Corporation
  * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
  * Copyright (C) 2016 Intel Deutschland GmbH
  */
@@ -313,6 +313,7 @@ enum {
 	SILICON_C_STEP,
 	SILICON_D_STEP,
 	SILICON_E_STEP,
+	SILICON_TC_STEP = 0xe,
 	SILICON_Z_STEP = 0xf,
 };
 

drivers/net/wireless/intel/iwlwifi/iwl-drv.c

@@ -162,6 +162,8 @@ static inline char iwl_drv_get_step(int step)
 {
 	if (step == SILICON_Z_STEP)
 		return 'z';
+	if (step == SILICON_TC_STEP)
+		return 'a';
 	return 'a' + step;
 }
 
@@ -178,6 +180,8 @@ const char *iwl_drv_get_fwname_pre(struct iwl_trans *trans, char *buf)
 
 	mac_step = iwl_drv_get_step(trans->hw_rev_step);
 
+	rf_step = iwl_drv_get_step(CSR_HW_RFID_STEP(trans->hw_rf_id));
+
 	switch (CSR_HW_RFID_TYPE(trans->hw_rf_id)) {
 	case IWL_CFG_RF_TYPE_HR1:
 	case IWL_CFG_RF_TYPE_HR2:
@@ -196,7 +200,13 @@ const char *iwl_drv_get_fwname_pre(struct iwl_trans *trans, char *buf)
 		rf = "fm";
 		break;
 	case IWL_CFG_RF_TYPE_WH:
-		rf = "wh";
+		if (SILICON_Z_STEP ==
+		    CSR_HW_RFID_STEP(trans->hw_rf_id)) {
+			rf = "whtc";
+			rf_step = 'a';
+		} else {
+			rf = "wh";
+		}
 		break;
 	default:
 		return "unknown-rf";
@@ -204,8 +214,6 @@ const char *iwl_drv_get_fwname_pre(struct iwl_trans *trans, char *buf)
 
 	cdb = CSR_HW_RFID_IS_CDB(trans->hw_rf_id) ? "4" : "";
 
-	rf_step = iwl_drv_get_step(CSR_HW_RFID_STEP(trans->hw_rf_id));
-
 	scnprintf(buf, FW_NAME_PRE_BUFSIZE,
 		  "iwlwifi-%s-%c0-%s%s-%c0",
 		  trans->cfg->fw_name_mac, mac_step,