drivers: ethernet: add WCH CH390 SPI Ethernet driver

bsp/gd32/arm/gd32407v-lckfb/board/Kconfig

@@ -245,6 +245,10 @@ menu "On-chip Peripheral Drivers"
         default n
         select RT_USING_SPI
         if BSP_USING_SPI
+            config BSP_USING_SPI0
+                bool "Enable SPI0 BUS"
+                default n
+
             config BSP_USING_SPI1
                 bool "Enable SPI1 BUS"
                 default n
@@ -357,6 +361,53 @@ endmenu
 
 menu "Board extended module Drivers"
 
+    config BSP_USING_CH390
+        bool "Enable WCH CH390 SPI Ethernet module"
+        select BSP_USING_SPI
+        select BSP_USING_SPI0
+        select RT_USING_CH390
+        select RT_USING_PIN
+        default n
+
+    if BSP_USING_CH390
+        config BSP_CH390_SPI_BUS_NAME
+            string "CH390 SPI bus name on this board"
+            default "spi0"
+
+        config BSP_CH390_SPI_DEVICE_NAME
+            string "CH390 SPI device name on this board"
+            default "spi10"
+
+        config BSP_CH390_NETIF_NAME
+            string "CH390 network interface name"
+            default "e0"
+
+        config BSP_CH390_CS_PIN
+            int "CH390 CS pin number on this board"
+            default 4
+
+        config BSP_CH390_RST_PIN
+            int "CH390 reset pin number on this board"
+            default -1
+
+        config BSP_CH390_INT_PIN
+            int "CH390 interrupt pin number on this board"
+            default 3
+
+        config BSP_CH390_SPI_MAX_HZ
+            int "CH390 SPI maximum frequency"
+            default 5000000
+
+        config BSP_CH390_POLL_INTERVAL_MS
+            int "CH390 RX polling interval in milliseconds"
+            default 20
+
+        config BSP_CH390_USING_DHCP
+            bool "Use DHCP for CH390 netif"
+            select RT_LWIP_DHCP
+            default n
+    endif
+
 endmenu
 
 endmenu

bsp/gd32/arm/gd32407v-lckfb/board/SConscript

@@ -3,6 +3,7 @@ import rtconfig
 from building import *
 
 cwd = GetCurrentDir()
+objs = []
 
 # add general drivers
 src = Split('''
@@ -14,4 +15,9 @@ path =  [cwd]
 CPPDEFINES = ['GD32F407','LCKFB_SKYSTART_GD32F407V']
 group = DefineGroup('Drivers', src, depend = [''], CPPPATH = path, CPPDEFINES = CPPDEFINES)
 
-Return('group')
+objs += group
+
+if os.path.isfile(os.path.join(cwd, 'ports', 'SConscript')):
+    objs += SConscript(os.path.join('ports', 'SConscript'))
+
+Return('objs')

bsp/gd32/arm/gd32407v-lckfb/board/ports/SConscript

@@ -0,0 +1,15 @@
+Import('RTT_ROOT')
+from building import *
+
+cwd = GetCurrentDir()
+
+src = []
+path = [cwd, cwd + '/..', cwd + '/../../../libraries/gd32_drivers',
+        RTT_ROOT + '/components/drivers/spi']
+
+if GetDepend('BSP_USING_CH390'):
+    src += ['ch390_port.c']
+
+group = DefineGroup('Drivers', src, depend = [''], CPPPATH = path)
+
+Return('group')

bsp/gd32/arm/gd32407v-lckfb/board/ports/ch390_port.c

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2006-2026, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2026-07-07     Liu Changjie add CH390 board port
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <board.h>
+#include <drv_spi.h>
+#include <ch390.h>
+
+#ifdef BSP_USING_CH390
+
+#define DBG_TAG "drv.ch390.port"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+static const rt_uint8_t ch390_mac[6] = {0x02, 0x12, 0x34, 0x56, 0x78, 0x90};
+
+static int rt_hw_ch390_port_init(void)
+{
+    struct ch390_config config;
+    rt_err_t ret;
+
+    ret = rt_hw_spi_device_attach(BSP_CH390_SPI_BUS_NAME,
+                                  BSP_CH390_SPI_DEVICE_NAME,
+                                  BSP_CH390_CS_PIN);
+    if (ret != RT_EOK)
+    {
+        LOG_E("attach %s to %s failed: %d",
+              BSP_CH390_SPI_DEVICE_NAME, BSP_CH390_SPI_BUS_NAME, ret);
+        return ret;
+    }
+
+    config.spi_device_name = BSP_CH390_SPI_DEVICE_NAME;
+    config.netif_name = BSP_CH390_NETIF_NAME;
+    config.rst_pin = BSP_CH390_RST_PIN;
+    config.int_pin = BSP_CH390_INT_PIN;
+    config.mac = ch390_mac;
+    config.spi_max_hz = BSP_CH390_SPI_MAX_HZ;
+    config.poll_interval_ms = BSP_CH390_POLL_INTERVAL_MS;
+
+    return ch390_attach(&config);
+}
+INIT_DEVICE_EXPORT(rt_hw_ch390_port_init);
+
+#endif /* BSP_USING_CH390 */

components/drivers/spi/Kconfig

@@ -239,6 +239,12 @@ menuconfig RT_USING_SPI
             select RT_USING_LWIP
             default n
 
+        config RT_USING_CH390
+            bool "Using WCH CH390 SPI Ethernet network interface"
+            select RT_USING_LWIP
+            select RT_USING_PIN
+            default n
+
         config RT_USING_SPI_WIFI
             bool "Using RW009/007 SPI Wi-Fi wireless interface"
             select RT_USING_LWIP

components/drivers/spi/SConscript

@@ -25,6 +25,9 @@ if GetDepend('RT_USING_SPI_WIFI'):
 if GetDepend('RT_USING_ENC28J60'):
     src_device += ['enc28j60.c']
 
+if GetDepend('RT_USING_CH390'):
+    src_device += ['ch390.c']
+
 if GetDepend('RT_USING_SPI_MSD'):
     src_device += ['dev_spi_msd.c']