diff --git a/arch/arm/mach-ux500/cpu.c b/arch/arm/mach-ux500/cpu.c
index 537870d3fea8..6d3b57d61835 100644
--- a/arch/arm/mach-ux500/cpu.c
+++ b/arch/arm/mach-ux500/cpu.c
@@ -8,7 +8,7 @@
 
 #include <linux/platform_device.h>
 #include <linux/io.h>
-#include <linux/mfd/db8500-prcmu.h>
+#include <linux/mfd/dbx500-prcmu.h>
 #include <linux/clksrc-dbx500-prcmu.h>
 #include <linux/sys_soc.h>
 #include <linux/err.h>
@@ -68,13 +68,16 @@ void __init ux500_init_irq(void)
 	 * Init clocks here so that they are available for system timer
 	 * initialization.
 	 */
-	if (cpu_is_u8500_family() || cpu_is_u9540())
-		db8500_prcmu_early_init();
-
-	if (cpu_is_u8500_family() || cpu_is_u9540())
+	if (cpu_is_u8500_family()) {
+		prcmu_early_init(U8500_PRCMU_BASE, SZ_8K - 1);
 		u8500_clk_init();
-	else if (cpu_is_u8540())
+	} else if (cpu_is_u9540()) {
+		prcmu_early_init(U8500_PRCMU_BASE, SZ_8K - 1);
+		u8500_clk_init();
+	} else if (cpu_is_u8540()) {
+		prcmu_early_init(U8500_PRCMU_BASE, SZ_8K + SZ_4K - 1);
 		u8540_clk_init();
+	}
 }
 
 void __init ux500_init_late(void)
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index 21f261bf9e95..0d0cc91f30e8 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -2825,8 +2825,19 @@ static void dbx500_fw_version_init(struct platform_device *pdev,
 	}
 }
 
-void __init db8500_prcmu_early_init(void)
+void __init db8500_prcmu_early_init(u32 phy_base, u32 size)
 {
+	/*
+	 * This is a temporary remap to bring up the clocks. It is
+	 * subsequently replaces with a real remap. After the merge of
+	 * the mailbox subsystem all of this early code goes away, and the
+	 * clock driver can probe independently. An early initcall will
+	 * still be needed, but it can be diverted into drivers/clk/ux500.
+	 */
+	prcmu_base = ioremap(phy_base, size);
+	if (!prcmu_base)
+		pr_err("%s: ioremap() of prcmu registers failed!\n", __func__);
+
 	spin_lock_init(&mb0_transfer.lock);
 	spin_lock_init(&mb0_transfer.dbb_irqs_lock);
 	mutex_init(&mb0_transfer.ac_wake_lock);
diff --git a/include/linux/mfd/db8500-prcmu.h b/include/linux/mfd/db8500-prcmu.h
index 77a46ae2fc17..ac943df93489 100644
--- a/include/linux/mfd/db8500-prcmu.h
+++ b/include/linux/mfd/db8500-prcmu.h
@@ -489,7 +489,7 @@ struct prcmu_auto_pm_config {
 
 #ifdef CONFIG_MFD_DB8500_PRCMU
 
-void db8500_prcmu_early_init(void);
+void db8500_prcmu_early_init(u32 phy_base, u32 size);
 int prcmu_set_rc_a2p(enum romcode_write);
 enum romcode_read prcmu_get_rc_p2a(void);
 enum ap_pwrst prcmu_get_xp70_current_state(void);
@@ -553,7 +553,7 @@ void db8500_prcmu_write_masked(unsigned int reg, u32 mask, u32 value);
 
 #else /* !CONFIG_MFD_DB8500_PRCMU */
 
-static inline void db8500_prcmu_early_init(void) {}
+static inline void db8500_prcmu_early_init(u32 phy_base, u32 size) {}
 
 static inline int prcmu_set_rc_a2p(enum romcode_write code)
 {
diff --git a/include/linux/mfd/dbx500-prcmu.h b/include/linux/mfd/dbx500-prcmu.h
index 3abcca91eecd..8c546cbcb9a6 100644
--- a/include/linux/mfd/dbx500-prcmu.h
+++ b/include/linux/mfd/dbx500-prcmu.h
@@ -276,9 +276,9 @@ struct prcmu_fw_version {
 
 #if defined(CONFIG_UX500_SOC_DB8500)
 
-static inline void __init prcmu_early_init(void)
+static inline void prcmu_early_init(u32 phy_base, u32 size)
 {
-	return db8500_prcmu_early_init();
+	return db8500_prcmu_early_init(phy_base, size);
 }
 
 static inline int prcmu_set_power_state(u8 state, bool keep_ulp_clk,
@@ -500,7 +500,7 @@ static inline int prcmu_config_a9wdog(u8 num, bool sleep_auto_off)
 }
 #else
 
-static inline void __init prcmu_early_init(void) {}
+static inline void prcmu_early_init(u32 phy_base, u32 size) {}
 
 static inline int prcmu_set_power_state(u8 state, bool keep_ulp_clk,
 	bool keep_ap_pll)