diff --git a/drivers/misc/altera_sysid.c b/drivers/misc/altera_sysid.c
index 737520f..2d0fa2a 100644
--- a/drivers/misc/altera_sysid.c
+++ b/drivers/misc/altera_sysid.c
@@ -76,8 +76,9 @@
 {
 	struct altera_sysid_platdata *plat = dev_get_platdata(dev);
 
-	plat->regs = ioremap(dev_get_addr(dev),
-		sizeof(struct altera_sysid_regs));
+	plat->regs = map_physmem(dev_get_addr(dev),
+				 sizeof(struct altera_sysid_regs),
+				 MAP_NOCACHE);
 
 	return 0;
 }