diff --git a/board/cssi/cmpc885/Makefile b/board/cssi/cmpc885/Makefile
index 6c05509..baf9e5a 100644
--- a/board/cssi/cmpc885/Makefile
+++ b/board/cssi/cmpc885/Makefile
@@ -5,6 +5,6 @@
 # Christophe Leroy <christophe.leroy@c-s.fr>
 #
 
-obj-y += cmpc885.o
+obj-y += cmpc885.o ../common/common.o
 obj-y += sdram.o
 obj-$(CONFIG_CMD_NAND) += nand.o
diff --git a/board/cssi/cmpc885/cmpc885.c b/board/cssi/cmpc885/cmpc885.c
index 5233c24..689d573 100644
--- a/board/cssi/cmpc885/cmpc885.c
+++ b/board/cssi/cmpc885/cmpc885.c
@@ -22,9 +22,10 @@
 #include <init.h>
 #include <fdt_support.h>
 #include <linux/delay.h>
-
 #include <spi.h>
 
+#include "../common/common.h"
+
 DECLARE_GLOBAL_DATA_PTR;
 
 #define BOARD_CMPC885		"cmpc885"
@@ -59,57 +60,6 @@
 #define R_RESET_STATUS		0x0400
 #define R_RST_STATUS		0x0004
 
-static int fdt_set_node_and_value(void *blob, char *node, const char *prop,
-				  void *var, int size)
-{
-	int ret, off;
-
-	off = fdt_path_offset(blob, node);
-
-	if (off < 0) {
-		printf("Cannot find %s node err:%s\n", node, fdt_strerror(off));
-
-		return off;
-	}
-
-	ret = fdt_setprop(blob, off, prop, var, size);
-
-	if (ret < 0)
-		printf("Cannot set %s/%s prop err: %s\n", node, prop, fdt_strerror(ret));
-
-	return ret;
-}
-
-/* Checks front/rear id and remove unneeded nodes from the blob */
-static void ft_cleanup(void *blob, uint32_t id, const char *prop, const char *compatible)
-{
-	int off;
-
-	off = fdt_node_offset_by_compatible(blob, -1, compatible);
-
-	while (off != -FDT_ERR_NOTFOUND) {
-		const struct fdt_property *ids;
-		int nb_ids, idx;
-		int tmp = -1;
-
-		ids = fdt_get_property(blob, off, prop, &nb_ids);
-
-		for (idx = 0; idx < nb_ids; idx += 4) {
-			if (*((uint32_t *)&ids->data[idx]) == id)
-				break;
-		}
-
-		if (idx >= nb_ids)
-			fdt_del_node(blob, off);
-		else
-			tmp = off;
-
-		off = fdt_node_offset_by_compatible(blob, tmp, compatible);
-	}
-
-	fdt_set_node_and_value(blob, "/", prop, &id, sizeof(uint32_t));
-}
-
 int ft_board_setup(void *blob, struct bd_info *bd)
 {
 	u8 fav_id, far_id;
diff --git a/board/cssi/common/common.c b/board/cssi/common/common.c
new file mode 100644
index 0000000..71b35cc
--- /dev/null
+++ b/board/cssi/common/common.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2010-2020 CS Group
+ * Charles Frey <charles.frey@c-s.fr>
+ * Florent Trinh Thai <florent.trinh-thai@c-s.fr>
+ * Christophe Leroy <christophe.leroy@c-s.fr>
+ *
+ * Common specific routines for the CS Group boards
+ */
+
+#include <fdt_support.h>
+
+static int fdt_set_node_and_value(void *blob, char *node, const char *prop,
+				  void *var, int size)
+{
+	int ret, off;
+
+	off = fdt_path_offset(blob, node);
+
+	if (off < 0) {
+		printf("Cannot find %s node err:%s\n", node, fdt_strerror(off));
+
+		return off;
+	}
+
+	ret = fdt_setprop(blob, off, prop, var, size);
+
+	if (ret < 0)
+		printf("Cannot set %s/%s prop err: %s\n", node, prop, fdt_strerror(ret));
+
+	return ret;
+}
+
+/* Checks front/rear id and remove unneeded nodes from the blob */
+void ft_cleanup(void *blob, unsigned long id, const char *prop, const char *compatible)
+{
+	int off;
+
+	off = fdt_node_offset_by_compatible(blob, -1, compatible);
+
+	while (off != -FDT_ERR_NOTFOUND) {
+		const struct fdt_property *ids;
+		int nb_ids, idx;
+		int tmp = -1;
+
+		ids = fdt_get_property(blob, off, prop, &nb_ids);
+
+		for (idx = 0; idx < nb_ids; idx += 4) {
+			if (*((uint32_t *)&ids->data[idx]) == id)
+				break;
+		}
+
+		if (idx >= nb_ids)
+			fdt_del_node(blob, off);
+		else
+			tmp = off;
+
+		off = fdt_node_offset_by_compatible(blob, tmp, compatible);
+	}
+
+	fdt_set_node_and_value(blob, "/", prop, &id, sizeof(uint32_t));
+}
diff --git a/board/cssi/common/common.h b/board/cssi/common/common.h
new file mode 100644
index 0000000..16852b6
--- /dev/null
+++ b/board/cssi/common/common.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef _BOARD_CSSI_COMMON_H
+#define _BOARD_CSSI_COMMON_H
+
+void ft_cleanup(void *blob, unsigned long id, const char *prop, const char *compatible);
+
+#endif /* _BOARD_CSSI_COMMON_H */