diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-prph.h b/drivers/net/wireless/intel/iwlwifi/iwl-prph.h
index 8e6a0c363c0d..925f308764bf 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-prph.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-prph.h
@@ -408,7 +408,12 @@ enum aux_misc_master1_en {
 #define AUX_MISC_MASTER1_SMPHR_STATUS	0xA20800
 #define RSA_ENABLE			0xA24B08
 #define PREG_AUX_BUS_WPROT_0		0xA04CC0
-#define PREG_PRPH_WPROT_0		0xA04CE0
+
+/* device family 9000 WPROT register */
+#define PREG_PRPH_WPROT_9000		0xA04CE0
+/* device family 22000 WPROT register */
+#define PREG_PRPH_WPROT_22000		0xA04D00
+
 #define SB_CPU_1_STATUS			0xA01E30
 #define SB_CPU_2_STATUS			0xA01E34
 #define UMAG_SB_CPU_1_STATUS		0xA038C0
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
index 803fcbac4152..e9d1075d91db 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
@@ -1698,10 +1698,40 @@ static int iwl_pcie_init_msix_handler(struct pci_dev *pdev,
 	return 0;
 }
 
+static int iwl_trans_pcie_clear_persistence_bit(struct iwl_trans *trans)
+{
+	u32 hpm, wprot;
+
+	switch (trans->cfg->device_family) {
+	case IWL_DEVICE_FAMILY_9000:
+		wprot = PREG_PRPH_WPROT_9000;
+		break;
+	case IWL_DEVICE_FAMILY_22000:
+		wprot = PREG_PRPH_WPROT_22000;
+		break;
+	default:
+		return 0;
+	}
+
+	hpm = iwl_read_umac_prph_no_grab(trans, HPM_DEBUG);
+	if (hpm != 0xa5a5a5a0 && (hpm & PERSISTENCE_BIT)) {
+		u32 wprot_val = iwl_read_umac_prph_no_grab(trans, wprot);
+
+		if (wprot_val & PREG_WFPM_ACCESS) {
+			IWL_ERR(trans,
+				"Error, can not clear persistence bit\n");
+			return -EPERM;
+		}
+		iwl_write_umac_prph_no_grab(trans, HPM_DEBUG,
+					    hpm & ~PERSISTENCE_BIT);
+	}
+
+	return 0;
+}
+
 static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
 {
 	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
-	u32 hpm;
 	int err;
 
 	lockdep_assert_held(&trans_pcie->mutex);
@@ -1712,19 +1742,9 @@ static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
 		return err;
 	}
 
-	hpm = iwl_read_umac_prph_no_grab(trans, HPM_DEBUG);
-	if (hpm != 0xa5a5a5a0 && (hpm & PERSISTENCE_BIT)) {
-		int wfpm_val = iwl_read_umac_prph_no_grab(trans,
-							  PREG_PRPH_WPROT_0);
-
-		if (wfpm_val & PREG_WFPM_ACCESS) {
-			IWL_ERR(trans,
-				"Error, can not clear persistence bit\n");
-			return -EPERM;
-		}
-		iwl_write_umac_prph_no_grab(trans, HPM_DEBUG,
-					    hpm & ~PERSISTENCE_BIT);
-	}
+	err = iwl_trans_pcie_clear_persistence_bit(trans);
+	if (err)
+		return err;
 
 	iwl_trans_pcie_sw_reset(trans);