diff --git a/feed/tops-tool/Makefile b/feed/tops-tool/Makefile
new file mode 100644
index 0000000..621c4cd
--- /dev/null
+++ b/feed/tops-tool/Makefile
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Copyright (C) 2023 Mediatek Inc. All Rights Reserved.
+# Author: Alvin Kuo <alvin.kuo@mediatek.com>
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=tops-tool
+PKG_RELEASE:=1
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/package-defaults.mk
+
+define Package/tops-tool
+  TITLE:=Mediatek Tunnel Offload Processor System User Tool
+  SECTION:=MTK Properties
+  CATEGORY:=MTK Properties
+  DEFAULT:=y
+  SUBMENU:=Applications
+  DEPENDS:=kmod-tops
+endef
+
+define Package/tops-tool/description
+  Mediatek Tunnel Offload Processor System User Tool
+endef
+
+TARGET_CFLAGS += \
+	-I$(PKG_BUILD_DIR)/inc
+
+define Build/Compile
+	$(MAKE) -C $(PKG_BUILD_DIR) \
+		CC="$(TARGET_CC)" \
+		CFLAGS="$(TARGET_CFLAGS) -Wall -Wextra" \
+		LDFLAGS="$(TARGET_LDFLAGS)"
+endef
+
+define Package/tops-tool/install
+	$(INSTALL_DIR) $(1)/usr/sbin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/tops-tool $(1)/usr/sbin/
+
+	$(INSTALL_DIR) $(1)/etc/init.d
+	$(INSTALL_BIN) ./files/tops-tool.init $(1)/etc/init.d/tops-tool
+endef
+
+$(eval $(call BuildPackage,tops-tool))
diff --git a/feed/tops-tool/files/tops-tool.init b/feed/tops-tool/files/tops-tool.init
new file mode 100644
index 0000000..6c4e612
--- /dev/null
+++ b/feed/tops-tool/files/tops-tool.init
@@ -0,0 +1,19 @@
+#!/bin/sh /etc/rc.common
+
+#the priority of TOPS driver is 41
+START=42
+
+USE_PROCD=1
+NAME=tops-tool
+PROG=/usr/sbin/tops-tool
+
+start_service() {
+	procd_open_instance
+	procd_set_param command "${PROG}" save_dump /log/tops
+	procd_set_param respawn
+	procd_close_instance
+}
+
+stop_service() {
+	service_stop "${PROG}"
+}
diff --git a/feed/tops-tool/src/Makefile b/feed/tops-tool/src/Makefile
new file mode 100644
index 0000000..b125bdb
--- /dev/null
+++ b/feed/tops-tool/src/Makefile
@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: GPL-2.0-or-later */
+#
+# Copyright (c) 2023 MediaTek Inc. All Rights Reserved.
+#
+# Author: Alvin Kuo <Alvin.Kuo@mediatek.com>
+#
+
+PROJECT := tops-tool
+OBJECTS := tops-tool.o dump.o
+
+all: $(PROJECT)
+
+$(PROJECT): $(OBJECTS) Makefile
+	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJECTS) -o $@
+
+%.o: %.c %.h Makefile
+	$(CC) $(CFLAGS) -c $< -o $@
+
+.PHONY : clean
+clean:
+	rm -f $(PROJECT) *.o
diff --git a/feed/tops-tool/src/dump.c b/feed/tops-tool/src/dump.c
new file mode 100644
index 0000000..d3a8bf1
--- /dev/null
+++ b/feed/tops-tool/src/dump.c
@@ -0,0 +1,324 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2023 MediaTek Inc. All Rights Reserved.
+ *
+ * Author: Alvin Kuo <Alvin.Kuo@mediatek.com>
+ */
+
+#include <limits.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <time.h>
+#include <poll.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "dump.h"
+
+static int time_to_str(time_t *time_sec, char *time_str, unsigned int time_str_size)
+{
+	struct tm *ptm;
+	int ret;
+
+	ptm = gmtime(time_sec);
+	if (!ptm)
+		return -1;
+
+	ret = strftime(time_str, time_str_size, "%Y%m%d%H%M%S", ptm);
+	if (!ret)
+		return -2;
+
+	return 0;
+}
+
+static int save_dump_data(char *dump_root_dir,
+			  struct dump_data_header *dd_hdr,
+			  char *dd)
+{
+	size_t dump_file_size = dd_hdr->info.size + sizeof(struct dump_info);
+	char dump_time_str[32];
+	struct stat st = { 0 };
+	char *dump_file = NULL;
+	char *dump_dir = NULL;
+	int ret = 0;
+	int fd;
+
+	ret = time_to_str((time_t *)&dd_hdr->info.dump_time_sec,
+			  dump_time_str, sizeof(dump_time_str));
+	if (ret < 0) {
+		fprintf(stderr,
+			DUMP_LOG_FMT("time_to_str(%lu) fail(%d)\n"),
+			dd_hdr->info.dump_time_sec, ret);
+		ret = -1;
+		goto out;
+	}
+
+	dump_dir = malloc(strlen(dump_root_dir) + 1 +
+			  strlen(dump_time_str) + 1);
+	if (!dump_dir) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	sprintf(dump_dir, "%s/%s", dump_root_dir, dump_time_str);
+
+	dump_file = malloc(strlen(dump_dir) + 1 +
+			   strlen(dd_hdr->info.name) + 1);
+	if (!dump_file) {
+		ret = -ENOMEM;
+		goto free_dump_dir;
+	}
+	sprintf(dump_file, "%s/%s", dump_dir, dd_hdr->info.name);
+
+	if (stat(dump_dir, &st)) {
+		ret = mkdir(dump_dir, 0775);
+		if (ret) {
+			fprintf(stderr,
+				DUMP_LOG_FMT("mkdir(%s) fail(%s)\n"),
+				dump_dir, strerror(errno));
+			ret = -1;
+			goto free_dump_file;
+		}
+
+		/* TODO: only keep latest three dump directories */
+	}
+
+	fd = open(dump_file, 0664);
+	if (fd < 0) {
+		fprintf(stderr,
+			DUMP_LOG_FMT("open(%s) fail(%s)\n"),
+			dump_file, strerror(errno));
+		ret = -1;
+		goto free_dump_file;
+	}
+
+	/* write information of dump at begining of the file */
+	lseek(fd, 0, SEEK_SET);
+	write(fd, &dd_hdr->info, sizeof(struct dump_info));
+
+	/* write data of dump start from data offset of the file */
+	lseek(fd, dd_hdr->data_offset, SEEK_CUR);
+	write(fd, dd, dd_hdr->data_len);
+
+	close(fd);
+
+	if (dd_hdr->last_frag) {
+		stat(dump_file, &st);
+		if ((size_t)st.st_size != dump_file_size) {
+			fprintf(stderr,
+				DUMP_LOG_FMT("file(%s) size %zu != %zu\n"),
+				dump_file, st.st_size, dump_file_size);
+			ret = -1;
+			goto free_dump_file;
+		}
+	}
+
+free_dump_file:
+	free(dump_file);
+	dump_file = NULL;
+
+free_dump_dir:
+	free(dump_dir);
+	dump_dir = NULL;
+
+out:
+	return ret;
+}
+
+static int read_retry(int fd, void *buf, int len)
+{
+	int out_len = 0;
+	int ret;
+
+	while (len > 0) {
+		ret = read(fd, buf, len);
+		if (ret < 0) {
+			if (errno == EINTR || errno == EAGAIN)
+				continue;
+
+			return -1;
+		}
+
+		if (!ret)
+			return 0;
+
+		out_len += ret;
+		len -= ret;
+		buf += ret;
+	}
+
+	return out_len;
+}
+
+static int mkdir_p(char *path, mode_t mode)
+{
+	struct stat st = { 0 };
+	char *cpy_path = NULL;
+	char *cur_path = NULL;
+	char *tmp_path = NULL;
+	int ret = 0;
+	char *dir;
+
+	cpy_path = malloc(strlen(path) + 1);
+	if (!cpy_path) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	strcpy(cpy_path, path);
+
+	cur_path = malloc(strlen(path) + 1);
+	if (!cur_path) {
+		ret = -ENOMEM;
+		goto free_cpy_path;
+	}
+	memset(cur_path, 0, strlen(path) + 1);
+
+	for (dir = strtok(cpy_path, "/");
+	     dir != NULL;
+	     dir = strtok(NULL, "/")) {
+		/* keep current path */
+		tmp_path = malloc(strlen(cur_path) + 1);
+		if (!tmp_path) {
+			ret = -ENOMEM;
+			goto free_cur_path;
+		}
+		strcpy(tmp_path, cur_path);
+
+		/* append directory in current path */
+		sprintf(cur_path, "%s/%s", tmp_path, dir);
+
+		free(tmp_path);
+		tmp_path = NULL;
+
+		if (stat(cur_path, &st)) {
+			ret = mkdir(cur_path, mode);
+			if (ret) {
+				fprintf(stderr,
+					DUMP_LOG_FMT("mkdir(%s) fail(%s)\n"),
+					cur_path, strerror(errno));
+				goto free_cur_path;
+			}
+		}
+	}
+
+free_cur_path:
+	free(cur_path);
+	cur_path = NULL;
+
+free_cpy_path:
+	free(cpy_path);
+	cpy_path = NULL;
+
+out:
+	return ret;
+}
+
+int tops_save_dump_data(char *dump_root_dir)
+{
+	struct stat st = { 0 };
+	int ret = 0;
+	int fd;
+
+	if (!dump_root_dir) {
+		ret = -1;
+		goto out;
+	}
+
+	/* reserve 256 bytes for saving name of dump directory and dump file */
+	if (strlen(dump_root_dir) > (PATH_MAX - 256)) {
+		fprintf(stderr,
+			DUMP_LOG_FMT("dump_root_dir(%s) length %zu > %u\n"),
+			dump_root_dir, strlen(dump_root_dir), PATH_MAX - 256);
+		return -1;
+	}
+
+	if (stat(dump_root_dir, &st)) {
+		ret = mkdir_p(dump_root_dir, 0775);
+		if (ret) {
+			fprintf(stderr,
+				DUMP_LOG_FMT("mkdir_p(%s) fail(%d)\n"),
+				dump_root_dir, ret);
+			ret = -1;
+			goto out;
+		}
+	}
+
+	fd = open(DUMP_DATA_PATH, O_RDONLY);
+	if (fd < 0) {
+		fprintf(stderr,
+			DUMP_LOG_FMT("open(%s) fail(%s)\n"),
+			DUMP_DATA_PATH, strerror(errno));
+		ret = -1;
+		goto out;
+	}
+
+	while (1) {
+		char dd[RELAY_DUMP_SUBBUF_SIZE - sizeof(struct dump_data_header)];
+		struct dump_data_header dd_hdr;
+		struct pollfd pfd = {
+			.fd = fd,
+			.events = POLLIN | POLLHUP | POLLERR,
+		};
+
+		poll(&pfd, 1, -1);
+
+		ret = read_retry(fd, &dd_hdr, sizeof(struct dump_data_header));
+		if (ret < 0) {
+			fprintf(stderr,
+				DUMP_LOG_FMT("read dd_hdr fail(%d)\n"), ret);
+			ret = -1;
+			break;
+		}
+
+		if (!ret)
+			continue;
+
+		if (dd_hdr.data_len == 0) {
+			fprintf(stderr,
+				DUMP_LOG_FMT("read empty data\n"));
+			continue;
+		}
+
+		if (dd_hdr.data_len > sizeof(dd)) {
+			fprintf(stderr,
+				DUMP_LOG_FMT("data length %u > %lu\n"),
+				dd_hdr.data_len, sizeof(dd));
+			ret = -1;
+			break;
+		}
+
+		ret = read_retry(fd, dd, dd_hdr.data_len);
+		if (ret < 0) {
+			fprintf(stderr,
+				DUMP_LOG_FMT("read dd fail(%d)\n"), ret);
+			ret = -1;
+			break;
+		}
+
+		if ((uint32_t)ret != dd_hdr.data_len) {
+			fprintf(stderr,
+				DUMP_LOG_FMT("read dd length %u != %u\n"),
+				(uint32_t)ret, dd_hdr.data_len);
+			ret = -1;
+			break;
+		}
+
+		ret = save_dump_data(dump_root_dir, &dd_hdr, dd);
+		if (ret) {
+			fprintf(stderr,
+				DUMP_LOG_FMT("save_dump_data(%s) fail(%d)\n"),
+				dump_root_dir, ret);
+			break;
+		}
+	}
+
+	close(fd);
+
+out:
+	return ret;
+}
diff --git a/feed/tops-tool/src/inc/dump.h b/feed/tops-tool/src/inc/dump.h
new file mode 100644
index 0000000..0d331c9
--- /dev/null
+++ b/feed/tops-tool/src/inc/dump.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2023 MediaTek Inc. All Rights Reserved.
+ *
+ * Author: Alvin Kuo <Alvin.Kuo@mediatek.com>
+ */
+
+#ifndef __DUMP_H__
+#define __DUMP_H__
+
+#include <sys/types.h>
+
+#define DUMP_INFO_NAME_MAX_LEN		32
+#define RELAY_DUMP_SUBBUF_SIZE		2048
+#define DUMP_DATA_PATH			"/sys/kernel/debug/tops/dump_data"
+
+#define DUMP_LOG_FMT(FMT) "[TOPS_TOOL] [%s]: " FMT, __func__
+
+struct dump_info {
+	char name[DUMP_INFO_NAME_MAX_LEN];
+	uint64_t dump_time_sec;
+	uint32_t start_addr;
+	uint32_t size;
+	uint32_t dump_rsn;
+#define DUMP_RSN_NULL				(0x0000)
+#define DUMP_RSN_WDT_TIMEOUT_CORE0		(0x0001)
+#define DUMP_RSN_WDT_TIMEOUT_CORE1		(0x0002)
+#define DUMP_RSN_WDT_TIMEOUT_CORE2		(0x0004)
+#define DUMP_RSN_WDT_TIMEOUT_CORE3		(0x0008)
+#define DUMP_RSN_WDT_TIMEOUT_COREM		(0x0010)
+#define DUMP_RSN_FE_RESET			(0x0020)
+};
+
+struct dump_data_header {
+	struct dump_info info;
+	uint32_t data_offset;
+	uint32_t data_len;
+	uint8_t last_frag;
+};
+
+int tops_save_dump_data(char *dump_dir);
+
+#endif /* __DUMP_H__ */
diff --git a/feed/tops-tool/src/tops-tool.c b/feed/tops-tool/src/tops-tool.c
new file mode 100644
index 0000000..32ab579
--- /dev/null
+++ b/feed/tops-tool/src/tops-tool.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2023 MediaTek Inc. All Rights Reserved.
+ *
+ * Author: Alvin Kuo <Alvin.Kuo@mediatek.com>
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "dump.h"
+
+static void print_usage(void)
+{
+	printf("Usage:\n");
+	printf(" tops-tool [CMD] [DUMP_DIR]\n");
+	printf(" [CMD] are:\n");
+	printf("    save_dump   save dump data as file in directory [DUMP_DIR]\n");
+	printf(" [DUMP_DIR] is directory of dump file\n");
+}
+
+static int verify_parameters(int argc,
+			     char *argv[])
+{
+	char *cmd;
+
+	if (argc < 2) {
+		fprintf(stderr, DUMP_LOG_FMT("missing cmd\n"));
+		return -EINVAL;
+	}
+
+	cmd = argv[1];
+	if (!strncmp(cmd, "save_dump", 9)) {
+		if (argc < 3) {
+			fprintf(stderr, DUMP_LOG_FMT("too few parameters\n"));
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	int ret = 0;
+	char *cmd;
+
+	ret = verify_parameters(argc, argv);
+	if (ret) {
+		print_usage();
+		goto error;
+	}
+
+	cmd = argv[1];
+	if (!strncmp(cmd, "save_dump", 9)) {
+		ret = tops_save_dump_data(argv[2]);
+		if (ret) {
+			fprintf(stderr,
+				DUMP_LOG_FMT("cmd %s: save dump data fail(%d)\n"),
+					     cmd, ret);
+			goto error;
+		}
+	} else {
+		fprintf(stderr, DUMP_LOG_FMT("unsupported cmd %s\n"), cmd);
+		goto error;
+	}
+
+error:
+	return ret;
+}