diff --git a/arch/blackfin/mach-common/ints-priority-dc.c b/arch/blackfin/mach-common/ints-priority-dc.c
index 80943bbd37c2..e6511db24032 100644
--- a/arch/blackfin/mach-common/ints-priority-dc.c
+++ b/arch/blackfin/mach-common/ints-priority-dc.c
@@ -371,6 +371,9 @@ int __init init_arch_irq(void)
 	bfin_write_SICA_IMASK1(SIC_UNMASK_ALL);
 	SSYNC();
 
+	bfin_write_SICA_IWR0(IWR_ENABLE_ALL);  
+	bfin_write_SICA_IWR1(IWR_ENABLE_ALL);  
+
 	local_irq_disable();
 
 	init_exception_buff();
diff --git a/arch/blackfin/mach-common/ints-priority-sc.c b/arch/blackfin/mach-common/ints-priority-sc.c
index cec0f841fb5a..27838da55d6c 100644
--- a/arch/blackfin/mach-common/ints-priority-sc.c
+++ b/arch/blackfin/mach-common/ints-priority-sc.c
@@ -472,8 +472,12 @@ int __init init_arch_irq(void)
 	bfin_write_SIC_IMASK0(SIC_UNMASK_ALL);
 	bfin_write_SIC_IMASK1(SIC_UNMASK_ALL);
 	bfin_write_SIC_IMASK2(SIC_UNMASK_ALL);
+	bfin_write_SIC_IWR0(IWR_ENABLE_ALL);
+	bfin_write_SIC_IWR1(IWR_ENABLE_ALL);
+	bfin_write_SIC_IWR2(IWR_ENABLE_ALL);		
 #else
 	bfin_write_SIC_IMASK(SIC_UNMASK_ALL);
+	bfin_write_SIC_IWR(IWR_ENABLE_ALL);
 #endif
 
 	SSYNC();
diff --git a/include/asm-blackfin/mach-bf548/cdefBF54x_base.h b/include/asm-blackfin/mach-bf548/cdefBF54x_base.h
index b1338000e27b..87f2385ed971 100644
--- a/include/asm-blackfin/mach-bf548/cdefBF54x_base.h
+++ b/include/asm-blackfin/mach-bf548/cdefBF54x_base.h
@@ -32,6 +32,7 @@
 #define _CDEF_BF54X_H
 
 #include "defBF54x_base.h"
+#include <asm/system.h>
 
 /* ************************************************************** */
 /* SYSTEM & MMR ADDRESS DEFINITIONS COMMON TO ALL ADSP-BF54x    */
@@ -44,7 +45,31 @@
 #define bfin_read_PLL_DIV()		bfin_read16(PLL_DIV)
 #define bfin_write_PLL_DIV(val)		bfin_write16(PLL_DIV, val)
 #define bfin_read_VR_CTL()		bfin_read16(VR_CTL)
-#define bfin_write_VR_CTL(val)		bfin_write16(VR_CTL, val)
+/* Writing to VR_CTL initiates a PLL relock sequence. */
+static __inline__ void bfin_write_VR_CTL(unsigned int val)
+{
+	unsigned long flags, iwr0, iwr1, iwr2;
+
+	/* Enable the PLL Wakeup bit in SIC IWR */
+	iwr0 = bfin_read32(SIC_IWR0);
+	iwr1 = bfin_read32(SIC_IWR1);
+	iwr2 = bfin_read32(SIC_IWR2);
+	/* Only allow PPL Wakeup) */
+	bfin_write32(SIC_IWR0, IWR_ENABLE(0));
+	bfin_write32(SIC_IWR1, 0);
+	bfin_write32(SIC_IWR2, 0);
+
+	bfin_write16(VR_CTL, val);
+	__builtin_bfin_ssync();
+
+	local_irq_save(flags);
+	asm("IDLE;");
+	local_irq_restore(flags);
+	bfin_write32(SIC_IWR0, iwr0);
+	bfin_write32(SIC_IWR1, iwr1);
+	bfin_write32(SIC_IWR2, iwr2);
+	
+}
 #define bfin_read_PLL_STAT()		bfin_read16(PLL_STAT)
 #define bfin_write_PLL_STAT(val)	bfin_write16(PLL_STAT, val)
 #define bfin_read_PLL_LOCKCNT()		bfin_read16(PLL_LOCKCNT)
diff --git a/include/asm-blackfin/mach-bf561/cdefBF561.h b/include/asm-blackfin/mach-bf561/cdefBF561.h
index b14f872e5703..6e8b8168a97a 100644
--- a/include/asm-blackfin/mach-bf561/cdefBF561.h
+++ b/include/asm-blackfin/mach-bf561/cdefBF561.h
@@ -57,12 +57,14 @@
 /* Writing to VR_CTL initiates a PLL relock sequence. */
 static __inline__ void bfin_write_VR_CTL(unsigned int val)
 {
-	unsigned long flags, iwr;
+	unsigned long flags, iwr0, iwr1;
 
 	/* Enable the PLL Wakeup bit in SIC IWR */
-	iwr = bfin_read32(SICA_IWR0);
+	iwr0 = bfin_read32(SICA_IWR0);
+	iwr1 = bfin_read32(SICA_IWR1);
 	/* Only allow PPL Wakeup) */
 	bfin_write32(SICA_IWR0, IWR_ENABLE(0));
+	bfin_write32(SICA_IWR1, 0);
 
 	bfin_write16(VR_CTL, val);
 	__builtin_bfin_ssync();
@@ -70,7 +72,9 @@ static __inline__ void bfin_write_VR_CTL(unsigned int val)
 	local_irq_save(flags);
 	asm("IDLE;");
 	local_irq_restore(flags);
-	bfin_write32(SICA_IWR0, iwr);
+	bfin_write32(SICA_IWR0, iwr0);
+	bfin_write32(SICA_IWR1, iwr1);
+
 }
 #define bfin_read_PLL_STAT()                 bfin_read16(PLL_STAT)
 #define bfin_write_PLL_STAT(val)             bfin_write16(PLL_STAT,val)