diff --git a/drivers/tty/serial/wch_35x/wch_main.c b/drivers/tty/serial/wch_35x/wch_main.c
index b3948678..4a4576f8 100644
--- a/drivers/tty/serial/wch_35x/wch_main.c
+++ b/drivers/tty/serial/wch_35x/wch_main.c
@@ -258,13 +258,19 @@ static int wch_pci_board_probe(void)
         for (i = 0; i < WCH_BOARDS_MAX; i++) {
             sb = &wch_board_table[i];
             if (sb->board_enum > 0) {
+#if WCH_DBG
                 printk("\n");
+#endif
                 if ((sb->pb_info.num_serport) > 0) {
+#if WCH_DBG
                     printk("WCH Info : Found WCH %s Series Board (%dS),\n", sb->pb_info.board_name,
                            sb->pb_info.num_serport);
+#endif
                 }
 
+#if WCH_DBG
                 printk("           bus number:%d, device number:%d\n\n", sb->bus_number, sb->dev_number);
+#endif
             }
         }
     }
@@ -834,12 +840,14 @@ int wch_35x_init(void)
 {
     int status = 0;
 
+#if WCH_DBG
     printk("\n\n");
     printk("=====================  WCH Device Driver Module Install  =====================\n");
     printk("\n");
     printk("WCH Info : Loading WCH Multi-I/O Board Driver Module\n");
     printk("                                                       -- Date : %s\n", WCH_DRIVER_DATE);
     printk("                                                       -- Version : %s\n\n", WCH_DRIVER_VERSION);
+#endif
 
     wch_ser_port_total_cnt = 0;
 
@@ -847,36 +855,48 @@ int wch_35x_init(void)
     if (status != 0) {
         goto step1_fail;
     }
+#if WCH_DBG
     printk("------------------->pci board probe success\n");
+#endif
     status = wch_get_pci_board_conf();
     if (status != 0) {
         goto step1_fail;
     }
+#if WCH_DBG
     printk("------------------->pci board conf success\n");
+#endif
 
     status = wch_assign_resource();
     if (status != 0) {
         goto step1_fail;
     }
+#if WCH_DBG
     printk("------------------->pci assign success\n");
+#endif
 
     status = wch_ser_port_table_init();
     if (status != 0) {
         goto step1_fail;
     }
+#if WCH_DBG
     printk("------------------->ser port table init success\n");
+#endif
 
     status = wch_register_irq();
     if (status != 0) {
         goto step1_fail;
     }
+#if WCH_DBG
     printk("------------------->pci register irq success\n");
+#endif
 
     status = wch_ser_register_driver(&wch_ser_reg);
     if (status != 0) {
         goto step2_fail;
     }
+#if WCH_DBG
     printk("------------------->ser register driver success\n");
+#endif
 
     status = wch_ser_register_ports(&wch_ser_reg);
     if (status != 0) {
@@ -888,7 +908,9 @@ int wch_35x_init(void)
 //	ch365_32s_test();
 #endif
 
+#if WCH_DBG
     printk("================================================================================\n");
+#endif
     return status;
 
 step3_fail:
diff --git a/drivers/tty/serial/wch_35x/wch_pre_main.c b/drivers/tty/serial/wch_35x/wch_pre_main.c
index c0b1e617..dbbf3342 100644
--- a/drivers/tty/serial/wch_35x/wch_pre_main.c
+++ b/drivers/tty/serial/wch_35x/wch_pre_main.c
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// SPDX-FileCopyrightText: Copyright (c) 2021-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 /*
  * PCI/PCIe to serial driver(pre) for ch351/352/353/355/356/357/358/359/382/384, etc.
  * This driver only needs to be used when the system does not assign an interrupt number for device.
@@ -15,20 +17,6 @@
  * V1.00 - initial version
  */
 
-/*
- * Copyright (c) 2021-2023, NVIDIA CORPORATION & AFFILIATES.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- */
-
-
 #include <linux/module.h>
 #include <linux/pci.h>
 
@@ -91,8 +79,10 @@
  */
 static int wch_probe(struct pci_dev *dev, const struct pci_device_id *ent)
 {
+#if WCH_DBG
     printk("\n====================WCH Device Driver(pre) Module probe====================\n");
     printk("Probe Device VID: %4x, PID: 0x%4x\n", dev->vendor, dev->device);
+#endif
 
     wch_35x_init();
     return 0;
@@ -100,8 +90,10 @@ static int wch_probe(struct pci_dev *dev, const struct pci_device_id *ent)
 
 static void wch_remove(struct pci_dev *dev)
 {
+#if WCH_DBG
     printk("\n====================WCH Device Driver(pre) Module exit====================\n");
     printk("Remove Device VID: %4x, PID: 0x%4x\n", dev->vendor, dev->device);
+#endif
     wch_35x_exit();
 }
 
diff --git a/drivers/tty/serial/wch_35x/wch_serial.c b/drivers/tty/serial/wch_35x/wch_serial.c
index b868f255..b739490d 100644
--- a/drivers/tty/serial/wch_35x/wch_serial.c
+++ b/drivers/tty/serial/wch_35x/wch_serial.c
@@ -2539,8 +2539,10 @@ extern int wch_ser_register_ports(struct ser_driver *drv)
                 return ret;
             }
         }
+#if WCH_DBG
         printk("Setup ttyWCH%d - PCIe port: port %lx, irq %d, type %d\n", sp->port.line, sp->port.iobase, sp->port.irq,
                sp->port.iotype);
+#endif
     }
 
     return 0;