diff --git a/src/devtools/met-driver/4.4/common/ondiemet.c b/src/devtools/met-driver/4.4/common/ondiemet.c
new file mode 100644
index 0000000..5247fa7
--- /dev/null
+++ b/src/devtools/met-driver/4.4/common/ondiemet.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2018 MediaTek Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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 "ondiemet.h"
+
+/* record enabled modules */
+unsigned int ondiemet_module[ONDIEMET_NUM];
+EXPORT_SYMBOL(ondiemet_module);
+
+void (*scp_start[ONDIEMET_NUM]) (void) = {
+sspm_start, NULL, NULL};
+
+void (*scp_stop[ONDIEMET_NUM]) (void) = {
+sspm_stop, NULL, NULL};
+
+void (*scp_extract[ONDIEMET_NUM]) (void) = {
+sspm_extract, NULL, NULL};
+
+/* record which MCU is started to generate data */
+int ondiemet_module_started[ONDIEMET_NUM];
+
+int ondiemet_attr_init(struct device *dev)
+{
+	int ret;
+
+	ret = sspm_attr_init(dev);
+	if (ret != 0) {
+		pr_debug("can not create device file: sspm related\n");
+		return ret;
+	}
+
+	return 0;
+
+}
+
+int ondiemet_attr_uninit(struct device *dev)
+{
+	int ret;
+
+	ret = sspm_attr_uninit(dev);
+	if (ret != 0) {
+		pr_debug("can not delete device file: sspm related\n");
+		return ret;
+	}
+
+	return 0;
+
+}
+
+void ondiemet_start(void)
+{
+	int i;
+
+	for (i = 0; i < ONDIEMET_NUM; i++) {
+		if (ondiemet_module[i] != 0) {
+			ondiemet_module_started[i] = 1;
+			(*scp_start[i]) ();
+		}
+	}
+}
+
+void ondiemet_stop(void)
+{
+	int i;
+
+	for (i = 0; i < ONDIEMET_NUM; i++) {
+		if (ondiemet_module[i] != 0) {
+			(*scp_stop[i]) ();
+			ondiemet_module_started[i] = 0;
+		}
+	}
+}
+
+void ondiemet_extract(void)
+{
+	int i;
+
+	for (i = 0; i < ONDIEMET_NUM; i++) {
+		if (ondiemet_module[i] != 0)
+			(*scp_extract[i]) ();
+	}
+}