Index: linux-3.3.8/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h
===================================================================
--- linux-3.3.8.orig/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h	2012-07-31 08:34:35.000000000 +0200
+++ linux-3.3.8/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h	2012-07-31 08:34:46.063369976 +0200
@@ -9,6 +9,8 @@
 #ifndef _LANTIQ_XWAY_IRQ_H__
 #define _LANTIQ_XWAY_IRQ_H__
 
+#define IM_NUM			5
+
 #define INT_NUM_IRQ0		8
 #define INT_NUM_IM0_IRL0	(INT_NUM_IRQ0 + 0)
 #define INT_NUM_IM1_IRL0	(INT_NUM_IRQ0 + 32)
Index: linux-3.3.8/arch/mips/lantiq/irq.c
===================================================================
--- linux-3.3.8.orig/arch/mips/lantiq/irq.c	2012-07-31 08:34:35.000000000 +0200
+++ linux-3.3.8/arch/mips/lantiq/irq.c	2012-07-31 08:51:40.203413329 +0200
@@ -48,8 +48,8 @@
  */
 #define LTQ_ICU_EBU_IRQ		22
 
-#define ltq_icu_w32(x, y)	ltq_w32((x), ltq_icu_membase + (y))
-#define ltq_icu_r32(x)		ltq_r32(ltq_icu_membase + (x))
+#define ltq_icu_w32(x, y, m)	ltq_w32((x), ltq_icu_membase[m] + (y))
+#define ltq_icu_r32(x, m)		ltq_r32(ltq_icu_membase[m] + (x))
 
 #define ltq_eiu_w32(x, y)	ltq_w32((x), ltq_eiu_membase + (y))
 #define ltq_eiu_r32(x)		ltq_r32(ltq_eiu_membase + (x))
@@ -63,11 +63,78 @@
 	LTQ_EIU_IR5,
 };
 
-static struct resource ltq_icu_resource = {
-	.name	= "icu",
-	.start	= LTQ_ICU_BASE_ADDR,
-	.end	= LTQ_ICU_BASE_ADDR + LTQ_ICU_SIZE - 1,
-	.flags	= IORESOURCE_MEM,
+static struct resource ltq_icu_resource[IM_NUM] = {
+{
+	.name   = "icu_im0",
+	.start  = LTQ_ICU_BASE_ADDR,
+	.end    = LTQ_ICU_BASE_ADDR + LTQ_ICU_OFFSET - 1,
+	.flags  = IORESOURCE_MEM,
+},
+#if IM_NUM >= 2
+{
+	.name   = "icu_im1",
+#ifdef LTQ_ICU_BASE_ADDR1
+	.start  = LTQ_ICU_BASE_ADDR1,
+	.end    = LTQ_ICU_BASE_ADDR1 + LTQ_ICU_OFFSET - 1,
+#else
+	.start  = LTQ_ICU_BASE_ADDR + (LTQ_ICU_OFFSET * 1),
+	.end    = LTQ_ICU_BASE_ADDR + (LTQ_ICU_OFFSET * 2) - 1,
+#endif
+	.flags  = IORESOURCE_MEM,
+},
+#endif
+#if IM_NUM >= 3
+{
+	.name   = "icu_im2",
+#ifdef LTQ_ICU_BASE_ADDR2
+	.start  = LTQ_ICU_BASE_ADDR2,
+	.end    = LTQ_ICU_BASE_ADDR2 + LTQ_ICU_OFFSET - 1,
+#else
+	.start  = LTQ_ICU_BASE_ADDR + (LTQ_ICU_OFFSET * 2),
+	.end    = LTQ_ICU_BASE_ADDR + (LTQ_ICU_OFFSET * 3) - 1,
+#endif
+	.flags  = IORESOURCE_MEM,
+},
+#endif
+#if IM_NUM >= 4
+{
+	.name   = "icu_im3",
+#ifdef LTQ_ICU_BASE_ADDR3
+	.start  = LTQ_ICU_BASE_ADDR3,
+	.end    = LTQ_ICU_BASE_ADDR3 + LTQ_ICU_OFFSET - 1,
+#else
+	.start  = LTQ_ICU_BASE_ADDR + (LTQ_ICU_OFFSET * 3),
+	.end    = LTQ_ICU_BASE_ADDR + (LTQ_ICU_OFFSET * 4) - 1,
+#endif
+	.flags  = IORESOURCE_MEM,
+},
+#endif
+#if IM_NUM >= 5
+{      
+	.name   = "icu_im4",
+#ifdef LTQ_ICU_BASE_ADDR4
+	.start  = LTQ_ICU_BASE_ADDR4,
+	.end    = LTQ_ICU_BASE_ADDR4 + LTQ_ICU_OFFSET - 1,
+#else
+	.start  = LTQ_ICU_BASE_ADDR + (LTQ_ICU_OFFSET * 4),
+	.end    = LTQ_ICU_BASE_ADDR + (LTQ_ICU_OFFSET * 5) - 1,
+#endif
+	.flags  = IORESOURCE_MEM,
+},
+#endif
+#if IM_NUM >= 6
+{
+	.name   = "icu_im5",
+#ifdef LTQ_ICU_BASE_ADDR5
+	.start  = LTQ_ICU_BASE_ADDR5,
+	.end    = LTQ_ICU_BASE_ADDR5 + LTQ_ICU_OFFSET - 1,
+#else
+	.start  = LTQ_ICU_BASE_ADDR + (LTQ_ICU_OFFSET * 5),
+	.end    = LTQ_ICU_BASE_ADDR + (LTQ_ICU_OFFSET * 6) - 1,
+#endif
+	.flags  = IORESOURCE_MEM,
+},
+#endif
 };
 
 static struct resource ltq_eiu_resource = {
@@ -77,50 +144,56 @@
 	.flags	= IORESOURCE_MEM,
 };
 
-static void __iomem *ltq_icu_membase;
+static void __iomem *ltq_icu_membase[IM_NUM];
 static void __iomem *ltq_eiu_membase;
 
 void ltq_disable_irq(struct irq_data *d)
 {
-	u32 ier = LTQ_ICU_IM0_IER;
 	int irq_nr = d->irq - INT_NUM_IRQ0;
+	unsigned int im_nr;
 
-	ier += LTQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
+	im_nr = (irq_nr / INT_NUM_IM_OFFSET);
 	irq_nr %= INT_NUM_IM_OFFSET;
-	ltq_icu_w32(ltq_icu_r32(ier) & ~(1 << irq_nr), ier);
+
+	ltq_icu_w32(ltq_icu_r32(LTQ_ICU_IM0_IER, im_nr) & ~(1 << irq_nr),
+		LTQ_ICU_IM0_IER, im_nr);
 }
 
 void ltq_mask_and_ack_irq(struct irq_data *d)
 {
-	u32 ier = LTQ_ICU_IM0_IER;
-	u32 isr = LTQ_ICU_IM0_ISR;
 	int irq_nr = d->irq - INT_NUM_IRQ0;
+	unsigned int im_nr;
 
-	ier += LTQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
-	isr += LTQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
+	irq_nr -= INT_NUM_IRQ0;
+	im_nr = (irq_nr / INT_NUM_IM_OFFSET);
 	irq_nr %= INT_NUM_IM_OFFSET;
-	ltq_icu_w32(ltq_icu_r32(ier) & ~(1 << irq_nr), ier);
-	ltq_icu_w32((1 << irq_nr), isr);
+
+	ltq_icu_w32(ltq_icu_r32(LTQ_ICU_IM0_IER, im_nr) & ~(1 << irq_nr), LTQ_ICU_IM0_IER, im_nr);
+	ltq_icu_w32((1 << irq_nr), LTQ_ICU_IM0_ISR, im_nr);
 }
 
 static void ltq_ack_irq(struct irq_data *d)
 {
-	u32 isr = LTQ_ICU_IM0_ISR;
 	int irq_nr = d->irq - INT_NUM_IRQ0;
+	unsigned int im_nr;
 
-	isr += LTQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
+	irq_nr -= INT_NUM_IRQ0;
+	im_nr = (irq_nr / INT_NUM_IM_OFFSET);
 	irq_nr %= INT_NUM_IM_OFFSET;
-	ltq_icu_w32((1 << irq_nr), isr);
+
+	ltq_icu_w32((1 << irq_nr), LTQ_ICU_IM0_ISR, im_nr);
 }
 
 void ltq_enable_irq(struct irq_data *d)
 {
-	u32 ier = LTQ_ICU_IM0_IER;
 	int irq_nr = d->irq - INT_NUM_IRQ0;
+	unsigned int im_nr;
 
-	ier += LTQ_ICU_OFFSET  * (irq_nr / INT_NUM_IM_OFFSET);
+	irq_nr -= INT_NUM_IRQ0;
+	im_nr = (irq_nr / INT_NUM_IM_OFFSET);
 	irq_nr %= INT_NUM_IM_OFFSET;
-	ltq_icu_w32(ltq_icu_r32(ier) | (1 << irq_nr), ier);
+
+	ltq_icu_w32(ltq_icu_r32(LTQ_ICU_IM0_IER, im_nr) | (1 << irq_nr), LTQ_ICU_IM0_IER, im_nr);
 }
 
 static unsigned int ltq_startup_eiu_irq(struct irq_data *d)
@@ -187,7 +260,7 @@
 {
 	u32 irq;
 
-	irq = ltq_icu_r32(LTQ_ICU_IM0_IOSR + (module * LTQ_ICU_OFFSET));
+	irq = ltq_icu_r32(LTQ_ICU_IM0_IOSR, module);
 	if (irq == 0)
 		return;
 
@@ -250,8 +323,19 @@
 {
 	int i;
 
-	if (insert_resource(&iomem_resource, &ltq_icu_resource) < 0)
-		panic("Failed to insert icu memory");
+	for (i=0; i < IM_NUM; i++) {
+		if (insert_resource(&iomem_resource, &ltq_icu_resource[i]) < 0)
+			panic("Failed to insert icu memory\n");
+
+		if (request_mem_region(ltq_icu_resource[i].start,
+				resource_size(&ltq_icu_resource[i]), "icu") < 0)
+			panic("Failed to request icu memory\n");
+
+		ltq_icu_membase[i] = ioremap_nocache(ltq_icu_resource[i].start,
+					resource_size(&ltq_icu_resource[i]));
+		if (!ltq_icu_membase[i])
+			panic("Failed to remap icu memory\n");
+	}
 
 	if (request_mem_region(ltq_icu_resource.start,
 			resource_size(&ltq_icu_resource), "icu") < 0)
@@ -277,11 +361,11 @@
 	}
 
 	/* make sure all irqs are turned off by default */
-	for (i = 0; i < 5; i++)
-		ltq_icu_w32(0, LTQ_ICU_IM0_IER + (i * LTQ_ICU_OFFSET));
-
-	/* clear all possibly pending interrupts */
-	ltq_icu_w32(~0, LTQ_ICU_IM0_ISR + (i * LTQ_ICU_OFFSET));
+	for (i = 0; i < IM_NUM; i++)
+		ltq_icu_w32(0, LTQ_ICU_IM0_IER, i);
+		/* clear all possibly pending interrupts */
+		ltq_icu_w32(~0, LTQ_ICU_IM0_ISR, i);
+	}
 
 	mips_cpu_irq_init();