diff --git a/src/soc/mediatek/common/include/soc/storage.h b/src/soc/mediatek/common/include/soc/storage.h
new file mode 100644
index 0000000000..8df4075271
--- /dev/null
+++ b/src/soc/mediatek/common/include/soc/storage.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
+
+#ifndef SOC_MEDIATEK_COMMON_STORAGE_H
+#define SOC_MEDIATEK_COMMON_STORAGE_H
+
+/* Bits [31:28] for base type (e.g. UFS, NVMe). */
+#define _BASE_TYPE_SHIFT 28
+#define _BASE_TYPE_MASK (0xf << _BASE_TYPE_SHIFT)
+#define _BASE_TYPE(x) (((x) & 0xf) << _BASE_TYPE_SHIFT)
+
+#define _BASE_TYPE_UFS _BASE_TYPE(0x1)
+#define _BASE_TYPE_NVME _BASE_TYPE(0x2)
+
+enum mtk_storage_type {
+	STORAGE_UNKNOWN		= 0,
+	STORAGE_UFS_31		= _BASE_TYPE_UFS | 0x310,
+	STORAGE_UFS_40		= _BASE_TYPE_UFS | 0x400,
+	STORAGE_UFS_40_HS	= _BASE_TYPE_UFS | 0x401,
+	STORAGE_NVME		= _BASE_TYPE_NVME,
+};
+
+enum mtk_storage_type mainboard_get_storage_type(void);
+
+#endif /* SOC_MEDIATEK_COMMON_STORAGE_H */