--- zzzz-none-000/linux-4.4.60/arch/arm/include/asm/mach/map.h	2017-04-08 07:53:53.000000000 +0000
+++ scorpion-7490-727/linux-4.4.60/arch/arm/include/asm/mach/map.h	2021-02-04 17:41:59.000000000 +0000
@@ -39,6 +39,9 @@
 };
 
 #ifdef CONFIG_MMU
+
+#define IO_ADDR(p)  ((void * __iomem)((p & 0x00FFFFFF) | (0xFC000000)))
+
 extern void iotable_init(struct map_desc *, int);
 extern void vm_reserve_area_early(unsigned long addr, unsigned long size,
 				  void *caller);