diff --git a/board/radxa/rock5a-rk3588s/rock5a-rk3588s.c b/board/radxa/rock5a-rk3588s/rock5a-rk3588s.c
new file mode 100644
index 0000000..2d7a8c0
--- /dev/null
+++ b/board/radxa/rock5a-rk3588s/rock5a-rk3588s.c
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2023 Collabora Ltd.
+ */
+
+#include <fdtdec.h>
+#include <fdt_support.h>
+
+#ifdef CONFIG_OF_BOARD_SETUP
+int rock5a_add_reserved_memory_fdt_nodes(void *new_blob)
+{
+	struct fdt_memory gap1 = {
+		.start = 0x3fc000000,
+		.end = 0x3fc4fffff,
+	};
+	struct fdt_memory gap2 = {
+		.start = 0x3fff00000,
+		.end = 0x3ffffffff,
+	};
+	unsigned long flags = FDTDEC_RESERVED_MEMORY_NO_MAP;
+	unsigned int ret;
+
+	/*
+	 * Inject the reserved-memory nodes into the DTS
+	 */
+	ret = fdtdec_add_reserved_memory(new_blob, "gap1", &gap1,  NULL, 0,
+					 NULL, flags);
+	if (ret)
+		return ret;
+
+	return fdtdec_add_reserved_memory(new_blob, "gap2", &gap2,  NULL, 0,
+					  NULL, flags);
+}
+
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+	return rock5a_add_reserved_memory_fdt_nodes(blob);
+}
+#endif