diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index e0d8565671a6..faa36d7b8786 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1232,6 +1232,8 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
 	 */
 	if (mdesc->map_io)
 		mdesc->map_io();
+	else
+		debug_ll_io_init();
 	fill_pmd_gaps();
 
 	/* Reserve fixed i/o space in VMALLOC region */