diff --git a/arch/arm/mach-ux500/cpu-db8500.c b/arch/arm/mach-ux500/cpu-db8500.c
index e7eba47..881cafb 100644
--- a/arch/arm/mach-ux500/cpu-db8500.c
+++ b/arch/arm/mach-ux500/cpu-db8500.c
@@ -27,13 +27,6 @@
 
 #include "board-mop500.h"
 #include "db8500-regs.h"
-#include "id.h"
-
-static void __init u8500_map_io(void)
-{
-	debug_ll_io_init();
-	ux500_setup_id();
-}
 
 /*
  * The PMU IRQ lines of two cores are wired together into a single interrupt.
@@ -117,7 +110,6 @@
 DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
 	.l2c_aux_val    = 0,
 	.l2c_aux_mask	= ~0,
-	.map_io		= u8500_map_io,
 	.init_irq	= ux500_init_irq,
 	.init_machine	= u8500_init_machine,
 	.dt_compat      = stericsson_dt_platform_compat,
diff --git a/arch/arm/mach-ux500/id.c b/arch/arm/mach-ux500/id.c
index 17f80ef..983004d 100644
--- a/arch/arm/mach-ux500/id.c
+++ b/arch/arm/mach-ux500/id.c
@@ -37,21 +37,16 @@
 
 static unsigned int __init ux500_read_asicid(phys_addr_t addr)
 {
-	phys_addr_t base = addr & ~0xfff;
-	struct map_desc desc = {
-		.virtual	= (unsigned long)UX500_VIRT_ROM,
-		.pfn		= __phys_to_pfn(base),
-		.length		= SZ_16K,
-		.type		= MT_DEVICE,
-	};
+	void __iomem *virt = ioremap(addr, 4);
+	unsigned int asicid;
 
-	iotable_init(&desc, 1);
+	if (!virt)
+		return 0;
 
-	/* As in devicemaps_init() */
-	local_flush_tlb_all();
-	flush_cache_all();
+	asicid = readl(virt);
+	iounmap(virt);
 
-	return readl(UX500_VIRT_ROM + (addr & 0xfff));
+	return asicid;
 }
 
 static void ux500_print_soc_info(unsigned int asicid)
@@ -86,7 +81,7 @@
  * DB9540	0x413fc090	0xFFFFDBF4		0x009540xx
  */
 
-void __init ux500_setup_id(void)
+static void __init ux500_setup_id(void)
 {
 	unsigned int cpuid = read_cpuid_id();
 	unsigned int asicid = 0;
@@ -197,6 +192,8 @@
 	struct soc_device *soc_dev;
 	struct soc_device_attribute *soc_dev_attr;
 
+	ux500_setup_id();
+
 	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 	if (!soc_dev_attr)
 		return ERR_PTR(-ENOMEM);