diff --git a/marvell/linux/arch/mips/cobalt/mtd.c b/marvell/linux/arch/mips/cobalt/mtd.c
new file mode 100644
index 0000000..95f579d
--- /dev/null
+++ b/marvell/linux/arch/mips/cobalt/mtd.c
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Registration of Cobalt MTD device.
+ *
+ *  Copyright (C) 2006  Yoichi Yuasa <yuasa@linux-mips.org>
+ */
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+
+static struct mtd_partition cobalt_mtd_partitions[] = {
+	{
+		.name	= "firmware",
+		.offset = 0x0,
+		.size	= 0x80000,
+	},
+};
+
+static struct physmap_flash_data cobalt_flash_data = {
+	.width		= 1,
+	.nr_parts	= 1,
+	.parts		= cobalt_mtd_partitions,
+};
+
+static struct resource cobalt_mtd_resource = {
+	.start	= 0x1fc00000,
+	.end	= 0x1fc7ffff,
+	.flags	= IORESOURCE_MEM,
+};
+
+static struct platform_device cobalt_mtd = {
+	.name		= "physmap-flash",
+	.dev		= {
+		.platform_data	= &cobalt_flash_data,
+	},
+	.num_resources	= 1,
+	.resource	= &cobalt_mtd_resource,
+};
+
+static int __init cobalt_mtd_init(void)
+{
+	platform_device_register(&cobalt_mtd);
+
+	return 0;
+}
+device_initcall(cobalt_mtd_init);