diff --git a/arch/arm/plat-s3c24xx/irq.c b/arch/arm/plat-s3c24xx/irq.c
index fe57bbb..cdf1e92 100644
--- a/arch/arm/plat-s3c24xx/irq.c
+++ b/arch/arm/plat-s3c24xx/irq.c
@@ -1,7 +1,9 @@
-/* linux/arch/arm/plat-s3c24xx/irq.c
+/*
+ * S3C24XX IRQ handling
  *
  * Copyright (c) 2003-2004 Simtec Electronics
  *	Ben Dooks <ben@simtec.co.uk>
+ * Copyright (c) 2012 Heiko Stuebner <heiko@sntech.de>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -12,175 +14,124 @@
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
 
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/io.h>
+#include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
 #include <linux/device.h>
 #include <linux/syscore_ops.h>
+#include <linux/irqdomain.h>
 
-#include <asm/irq.h>
 #include <asm/mach/irq.h>
 
-#include <plat/regs-irqtype.h>
+#include <mach/regs-irq.h>
+#include <mach/regs-gpio.h>
 
 #include <plat/cpu.h>
+#include <plat/regs-irqtype.h>
 #include <plat/pm.h>
 #include <plat/irq.h>
 
-static void
-s3c_irq_mask(struct irq_data *data)
-{
-	unsigned int irqno = data->irq - IRQ_EINT0;
-	unsigned long mask;
+#define S3C_IRQTYPE_NONE	0
+#define S3C_IRQTYPE_EINT	1
+#define S3C_IRQTYPE_EDGE	2
+#define S3C_IRQTYPE_LEVEL	3
 
-	mask = __raw_readl(S3C2410_INTMSK);
-	mask |= 1UL << irqno;
-	__raw_writel(mask, S3C2410_INTMSK);
-}
+struct s3c_irq_data {
+	unsigned int type;
+	unsigned long parent_irq;
 
-static inline void
-s3c_irq_ack(struct irq_data *data)
-{
-	unsigned long bitval = 1UL << (data->irq - IRQ_EINT0);
-
-	__raw_writel(bitval, S3C2410_SRCPND);
-	__raw_writel(bitval, S3C2410_INTPND);
-}
-
-static inline void
-s3c_irq_maskack(struct irq_data *data)
-{
-	unsigned long bitval = 1UL << (data->irq - IRQ_EINT0);
-	unsigned long mask;
-
-	mask = __raw_readl(S3C2410_INTMSK);
-	__raw_writel(mask|bitval, S3C2410_INTMSK);
-
-	__raw_writel(bitval, S3C2410_SRCPND);
-	__raw_writel(bitval, S3C2410_INTPND);
-}
-
-
-static void
-s3c_irq_unmask(struct irq_data *data)
-{
-	unsigned int irqno = data->irq;
-	unsigned long mask;
-
-	if (irqno != IRQ_TIMER4 && irqno != IRQ_EINT8t23)
-		irqdbf2("s3c_irq_unmask %d\n", irqno);
-
-	irqno -= IRQ_EINT0;
-
-	mask = __raw_readl(S3C2410_INTMSK);
-	mask &= ~(1UL << irqno);
-	__raw_writel(mask, S3C2410_INTMSK);
-}
-
-struct irq_chip s3c_irq_level_chip = {
-	.name		= "s3c-level",
-	.irq_ack	= s3c_irq_maskack,
-	.irq_mask	= s3c_irq_mask,
-	.irq_unmask	= s3c_irq_unmask,
-	.irq_set_wake	= s3c_irq_wake
+	/* data gets filled during init */
+	struct s3c_irq_intc *intc;
+	unsigned long sub_bits;
+	struct s3c_irq_intc *sub_intc;
 };
 
-struct irq_chip s3c_irq_chip = {
-	.name		= "s3c",
-	.irq_ack	= s3c_irq_ack,
-	.irq_mask	= s3c_irq_mask,
-	.irq_unmask	= s3c_irq_unmask,
-	.irq_set_wake	= s3c_irq_wake
+/*
+ * Sructure holding the controller data
+ * @reg_pending		register holding pending irqs
+ * @reg_intpnd		special register intpnd in main intc
+ * @reg_mask		mask register
+ * @domain		irq_domain of the controller
+ * @parent		parent controller for ext and sub irqs
+ * @irqs		irq-data, always s3c_irq_data[32]
+ */
+struct s3c_irq_intc {
+	void __iomem		*reg_pending;
+	void __iomem		*reg_intpnd;
+	void __iomem		*reg_mask;
+	struct irq_domain	*domain;
+	struct s3c_irq_intc	*parent;
+	struct s3c_irq_data	*irqs;
 };
 
-static void
-s3c_irqext_mask(struct irq_data *data)
+static void s3c_irq_mask(struct irq_data *data)
 {
-	unsigned int irqno = data->irq - EXTINT_OFF;
+	struct s3c_irq_intc *intc = data->domain->host_data;
+	struct s3c_irq_intc *parent_intc = intc->parent;
+	struct s3c_irq_data *irq_data = &intc->irqs[data->hwirq];
+	struct s3c_irq_data *parent_data;
 	unsigned long mask;
+	unsigned int irqno;
 
-	mask = __raw_readl(S3C24XX_EINTMASK);
-	mask |= ( 1UL << irqno);
-	__raw_writel(mask, S3C24XX_EINTMASK);
-}
+	mask = __raw_readl(intc->reg_mask);
+	mask |= (1UL << data->hwirq);
+	__raw_writel(mask, intc->reg_mask);
 
-static void
-s3c_irqext_ack(struct irq_data *data)
-{
-	unsigned long req;
-	unsigned long bit;
-	unsigned long mask;
+	if (parent_intc && irq_data->parent_irq) {
+		parent_data = &parent_intc->irqs[irq_data->parent_irq];
 
-	bit = 1UL << (data->irq - EXTINT_OFF);
-
-	mask = __raw_readl(S3C24XX_EINTMASK);
-
-	__raw_writel(bit, S3C24XX_EINTPEND);
-
-	req = __raw_readl(S3C24XX_EINTPEND);
-	req &= ~mask;
-
-	/* not sure if we should be acking the parent irq... */
-
-	if (data->irq <= IRQ_EINT7) {
-		if ((req & 0xf0) == 0)
-			s3c_irq_ack(irq_get_irq_data(IRQ_EINT4t7));
-	} else {
-		if ((req >> 8) == 0)
-			s3c_irq_ack(irq_get_irq_data(IRQ_EINT8t23));
+		/* check to see if we need to mask the parent IRQ */
+		if ((mask & parent_data->sub_bits) == parent_data->sub_bits) {
+			irqno = irq_find_mapping(parent_intc->domain,
+					 irq_data->parent_irq);
+			s3c_irq_mask(irq_get_irq_data(irqno));
+		}
 	}
 }
 
-static void
-s3c_irqext_unmask(struct irq_data *data)
+static void s3c_irq_unmask(struct irq_data *data)
 {
-	unsigned int irqno = data->irq - EXTINT_OFF;
+	struct s3c_irq_intc *intc = data->domain->host_data;
+	struct s3c_irq_intc *parent_intc = intc->parent;
+	struct s3c_irq_data *irq_data = &intc->irqs[data->hwirq];
 	unsigned long mask;
+	unsigned int irqno;
 
-	mask = __raw_readl(S3C24XX_EINTMASK);
-	mask &= ~(1UL << irqno);
-	__raw_writel(mask, S3C24XX_EINTMASK);
+	mask = __raw_readl(intc->reg_mask);
+	mask &= ~(1UL << data->hwirq);
+	__raw_writel(mask, intc->reg_mask);
+
+	if (parent_intc && irq_data->parent_irq) {
+		irqno = irq_find_mapping(parent_intc->domain,
+					 irq_data->parent_irq);
+		s3c_irq_unmask(irq_get_irq_data(irqno));
+	}
 }
 
-int
-s3c_irqext_type(struct irq_data *data, unsigned int type)
+static inline void s3c_irq_ack(struct irq_data *data)
 {
-	void __iomem *extint_reg;
-	void __iomem *gpcon_reg;
-	unsigned long gpcon_offset, extint_offset;
+	struct s3c_irq_intc *intc = data->domain->host_data;
+	unsigned long bitval = 1UL << data->hwirq;
+
+	__raw_writel(bitval, intc->reg_pending);
+	if (intc->reg_intpnd)
+		__raw_writel(bitval, intc->reg_intpnd);
+}
+
+static int s3c_irqext_type_set(void __iomem *gpcon_reg,
+			       void __iomem *extint_reg,
+			       unsigned long gpcon_offset,
+			       unsigned long extint_offset,
+			       unsigned int type)
+{
 	unsigned long newvalue = 0, value;
 
-	if ((data->irq >= IRQ_EINT0) && (data->irq <= IRQ_EINT3)) {
-		gpcon_reg = S3C2410_GPFCON;
-		extint_reg = S3C24XX_EXTINT0;
-		gpcon_offset = (data->irq - IRQ_EINT0) * 2;
-		extint_offset = (data->irq - IRQ_EINT0) * 4;
-	} else if ((data->irq >= IRQ_EINT4) && (data->irq <= IRQ_EINT7)) {
-		gpcon_reg = S3C2410_GPFCON;
-		extint_reg = S3C24XX_EXTINT0;
-		gpcon_offset = (data->irq - (EXTINT_OFF)) * 2;
-		extint_offset = (data->irq - (EXTINT_OFF)) * 4;
-	} else if ((data->irq >= IRQ_EINT8) && (data->irq <= IRQ_EINT15)) {
-		gpcon_reg = S3C2410_GPGCON;
-		extint_reg = S3C24XX_EXTINT1;
-		gpcon_offset = (data->irq - IRQ_EINT8) * 2;
-		extint_offset = (data->irq - IRQ_EINT8) * 4;
-	} else if ((data->irq >= IRQ_EINT16) && (data->irq <= IRQ_EINT23)) {
-		gpcon_reg = S3C2410_GPGCON;
-		extint_reg = S3C24XX_EXTINT2;
-		gpcon_offset = (data->irq - IRQ_EINT8) * 2;
-		extint_offset = (data->irq - IRQ_EINT16) * 4;
-	} else {
-		return -1;
-	}
-
 	/* Set the GPIO to external interrupt mode */
 	value = __raw_readl(gpcon_reg);
 	value = (value & ~(3 << gpcon_offset)) | (0x02 << gpcon_offset);
@@ -190,7 +141,7 @@
 	switch (type)
 	{
 		case IRQ_TYPE_NONE:
-			printk(KERN_WARNING "No edge setting!\n");
+			pr_warn("No edge setting!\n");
 			break;
 
 		case IRQ_TYPE_EDGE_RISING:
@@ -214,8 +165,8 @@
 			break;
 
 		default:
-			printk(KERN_ERR "No such irq type %d", type);
-			return -1;
+			pr_err("No such irq type %d", type);
+			return -EINVAL;
 	}
 
 	value = __raw_readl(extint_reg);
@@ -225,11 +176,75 @@
 	return 0;
 }
 
+/* FIXME: make static when it's out of plat-samsung/irq.h */
+int s3c_irqext_type(struct irq_data *data, unsigned int type)
+{
+	void __iomem *extint_reg;
+	void __iomem *gpcon_reg;
+	unsigned long gpcon_offset, extint_offset;
+
+	if ((data->hwirq >= 4) && (data->hwirq <= 7)) {
+		gpcon_reg = S3C2410_GPFCON;
+		extint_reg = S3C24XX_EXTINT0;
+		gpcon_offset = (data->hwirq) * 2;
+		extint_offset = (data->hwirq) * 4;
+	} else if ((data->hwirq >= 8) && (data->hwirq <= 15)) {
+		gpcon_reg = S3C2410_GPGCON;
+		extint_reg = S3C24XX_EXTINT1;
+		gpcon_offset = (data->hwirq - 8) * 2;
+		extint_offset = (data->hwirq - 8) * 4;
+	} else if ((data->hwirq >= 16) && (data->hwirq <= 23)) {
+		gpcon_reg = S3C2410_GPGCON;
+		extint_reg = S3C24XX_EXTINT2;
+		gpcon_offset = (data->hwirq - 8) * 2;
+		extint_offset = (data->hwirq - 16) * 4;
+	} else {
+		return -EINVAL;
+	}
+
+	return s3c_irqext_type_set(gpcon_reg, extint_reg, gpcon_offset,
+				   extint_offset, type);
+}
+
+static int s3c_irqext0_type(struct irq_data *data, unsigned int type)
+{
+	void __iomem *extint_reg;
+	void __iomem *gpcon_reg;
+	unsigned long gpcon_offset, extint_offset;
+
+	if ((data->hwirq >= 0) && (data->hwirq <= 3)) {
+		gpcon_reg = S3C2410_GPFCON;
+		extint_reg = S3C24XX_EXTINT0;
+		gpcon_offset = (data->hwirq) * 2;
+		extint_offset = (data->hwirq) * 4;
+	} else {
+		return -EINVAL;
+	}
+
+	return s3c_irqext_type_set(gpcon_reg, extint_reg, gpcon_offset,
+				   extint_offset, type);
+}
+
+struct irq_chip s3c_irq_chip = {
+	.name		= "s3c",
+	.irq_ack	= s3c_irq_ack,
+	.irq_mask	= s3c_irq_mask,
+	.irq_unmask	= s3c_irq_unmask,
+	.irq_set_wake	= s3c_irq_wake
+};
+
+struct irq_chip s3c_irq_level_chip = {
+	.name		= "s3c-level",
+	.irq_mask	= s3c_irq_mask,
+	.irq_unmask	= s3c_irq_unmask,
+	.irq_ack	= s3c_irq_ack,
+};
+
 static struct irq_chip s3c_irqext_chip = {
 	.name		= "s3c-ext",
-	.irq_mask	= s3c_irqext_mask,
-	.irq_unmask	= s3c_irqext_unmask,
-	.irq_ack	= s3c_irqext_ack,
+	.irq_mask	= s3c_irq_mask,
+	.irq_unmask	= s3c_irq_unmask,
+	.irq_ack	= s3c_irq_ack,
 	.irq_set_type	= s3c_irqext_type,
 	.irq_set_wake	= s3c_irqext_wake
 };
@@ -240,250 +255,34 @@
 	.irq_mask	= s3c_irq_mask,
 	.irq_unmask	= s3c_irq_unmask,
 	.irq_set_wake	= s3c_irq_wake,
-	.irq_set_type	= s3c_irqext_type,
+	.irq_set_type	= s3c_irqext0_type,
 };
 
-/* mask values for the parent registers for each of the interrupt types */
-
-#define INTMSK_UART0	 (1UL << (IRQ_UART0 - IRQ_EINT0))
-#define INTMSK_UART1	 (1UL << (IRQ_UART1 - IRQ_EINT0))
-#define INTMSK_UART2	 (1UL << (IRQ_UART2 - IRQ_EINT0))
-#define INTMSK_ADCPARENT (1UL << (IRQ_ADCPARENT - IRQ_EINT0))
-
-
-/* UART0 */
-
-static void
-s3c_irq_uart0_mask(struct irq_data *data)
+static void s3c_irq_demux(unsigned int irq, struct irq_desc *desc)
 {
-	s3c_irqsub_mask(data->irq, INTMSK_UART0, 7);
-}
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	struct s3c_irq_intc *intc = desc->irq_data.domain->host_data;
+	struct s3c_irq_data *irq_data = &intc->irqs[desc->irq_data.hwirq];
+	struct s3c_irq_intc *sub_intc = irq_data->sub_intc;
+	unsigned long src;
+	unsigned long msk;
+	unsigned int n;
 
-static void
-s3c_irq_uart0_unmask(struct irq_data *data)
-{
-	s3c_irqsub_unmask(data->irq, INTMSK_UART0);
-}
+	chained_irq_enter(chip, desc);
 
-static void
-s3c_irq_uart0_ack(struct irq_data *data)
-{
-	s3c_irqsub_maskack(data->irq, INTMSK_UART0, 7);
-}
+	src = __raw_readl(sub_intc->reg_pending);
+	msk = __raw_readl(sub_intc->reg_mask);
 
-static struct irq_chip s3c_irq_uart0 = {
-	.name		= "s3c-uart0",
-	.irq_mask	= s3c_irq_uart0_mask,
-	.irq_unmask	= s3c_irq_uart0_unmask,
-	.irq_ack	= s3c_irq_uart0_ack,
-};
+	src &= ~msk;
+	src &= irq_data->sub_bits;
 
-/* UART1 */
-
-static void
-s3c_irq_uart1_mask(struct irq_data *data)
-{
-	s3c_irqsub_mask(data->irq, INTMSK_UART1, 7 << 3);
-}
-
-static void
-s3c_irq_uart1_unmask(struct irq_data *data)
-{
-	s3c_irqsub_unmask(data->irq, INTMSK_UART1);
-}
-
-static void
-s3c_irq_uart1_ack(struct irq_data *data)
-{
-	s3c_irqsub_maskack(data->irq, INTMSK_UART1, 7 << 3);
-}
-
-static struct irq_chip s3c_irq_uart1 = {
-	.name		= "s3c-uart1",
-	.irq_mask	= s3c_irq_uart1_mask,
-	.irq_unmask	= s3c_irq_uart1_unmask,
-	.irq_ack	= s3c_irq_uart1_ack,
-};
-
-/* UART2 */
-
-static void
-s3c_irq_uart2_mask(struct irq_data *data)
-{
-	s3c_irqsub_mask(data->irq, INTMSK_UART2, 7 << 6);
-}
-
-static void
-s3c_irq_uart2_unmask(struct irq_data *data)
-{
-	s3c_irqsub_unmask(data->irq, INTMSK_UART2);
-}
-
-static void
-s3c_irq_uart2_ack(struct irq_data *data)
-{
-	s3c_irqsub_maskack(data->irq, INTMSK_UART2, 7 << 6);
-}
-
-static struct irq_chip s3c_irq_uart2 = {
-	.name		= "s3c-uart2",
-	.irq_mask	= s3c_irq_uart2_mask,
-	.irq_unmask	= s3c_irq_uart2_unmask,
-	.irq_ack	= s3c_irq_uart2_ack,
-};
-
-/* ADC and Touchscreen */
-
-static void
-s3c_irq_adc_mask(struct irq_data *d)
-{
-	s3c_irqsub_mask(d->irq, INTMSK_ADCPARENT, 3 << 9);
-}
-
-static void
-s3c_irq_adc_unmask(struct irq_data *d)
-{
-	s3c_irqsub_unmask(d->irq, INTMSK_ADCPARENT);
-}
-
-static void
-s3c_irq_adc_ack(struct irq_data *d)
-{
-	s3c_irqsub_ack(d->irq, INTMSK_ADCPARENT, 3 << 9);
-}
-
-static struct irq_chip s3c_irq_adc = {
-	.name		= "s3c-adc",
-	.irq_mask	= s3c_irq_adc_mask,
-	.irq_unmask	= s3c_irq_adc_unmask,
-	.irq_ack	= s3c_irq_adc_ack,
-};
-
-/* irq demux for adc */
-static void s3c_irq_demux_adc(unsigned int irq,
-			      struct irq_desc *desc)
-{
-	unsigned int subsrc, submsk;
-	unsigned int offset = 9;
-
-	/* read the current pending interrupts, and the mask
-	 * for what it is available */
-
-	subsrc = __raw_readl(S3C2410_SUBSRCPND);
-	submsk = __raw_readl(S3C2410_INTSUBMSK);
-
-	subsrc &= ~submsk;
-	subsrc >>= offset;
-	subsrc &= 3;
-
-	if (subsrc != 0) {
-		if (subsrc & 1) {
-			generic_handle_irq(IRQ_TC);
-		}
-		if (subsrc & 2) {
-			generic_handle_irq(IRQ_ADC);
-		}
-	}
-}
-
-static void s3c_irq_demux_uart(unsigned int start)
-{
-	unsigned int subsrc, submsk;
-	unsigned int offset = start - IRQ_S3CUART_RX0;
-
-	/* read the current pending interrupts, and the mask
-	 * for what it is available */
-
-	subsrc = __raw_readl(S3C2410_SUBSRCPND);
-	submsk = __raw_readl(S3C2410_INTSUBMSK);
-
-	irqdbf2("s3c_irq_demux_uart: start=%d (%d), subsrc=0x%08x,0x%08x\n",
-		start, offset, subsrc, submsk);
-
-	subsrc &= ~submsk;
-	subsrc >>= offset;
-	subsrc &= 7;
-
-	if (subsrc != 0) {
-		if (subsrc & 1)
-			generic_handle_irq(start);
-
-		if (subsrc & 2)
-			generic_handle_irq(start+1);
-
-		if (subsrc & 4)
-			generic_handle_irq(start+2);
-	}
-}
-
-/* uart demux entry points */
-
-static void
-s3c_irq_demux_uart0(unsigned int irq,
-		    struct irq_desc *desc)
-{
-	irq = irq;
-	s3c_irq_demux_uart(IRQ_S3CUART_RX0);
-}
-
-static void
-s3c_irq_demux_uart1(unsigned int irq,
-		    struct irq_desc *desc)
-{
-	irq = irq;
-	s3c_irq_demux_uart(IRQ_S3CUART_RX1);
-}
-
-static void
-s3c_irq_demux_uart2(unsigned int irq,
-		    struct irq_desc *desc)
-{
-	irq = irq;
-	s3c_irq_demux_uart(IRQ_S3CUART_RX2);
-}
-
-static void
-s3c_irq_demux_extint8(unsigned int irq,
-		      struct irq_desc *desc)
-{
-	unsigned long eintpnd = __raw_readl(S3C24XX_EINTPEND);
-	unsigned long eintmsk = __raw_readl(S3C24XX_EINTMASK);
-
-	eintpnd &= ~eintmsk;
-	eintpnd &= ~0xff;	/* ignore lower irqs */
-
-	/* we may as well handle all the pending IRQs here */
-
-	while (eintpnd) {
-		irq = __ffs(eintpnd);
-		eintpnd &= ~(1<<irq);
-
-		irq += (IRQ_EINT4 - 4);
-		generic_handle_irq(irq);
+	while (src) {
+		n = __ffs(src);
+		src &= ~(1 << n);
+		generic_handle_irq(irq_find_mapping(sub_intc->domain, n));
 	}
 
-}
-
-static void
-s3c_irq_demux_extint4t7(unsigned int irq,
-			struct irq_desc *desc)
-{
-	unsigned long eintpnd = __raw_readl(S3C24XX_EINTPEND);
-	unsigned long eintmsk = __raw_readl(S3C24XX_EINTMASK);
-
-	eintpnd &= ~eintmsk;
-	eintpnd &= 0xff;	/* only lower irqs */
-
-	/* we may as well handle all the pending IRQs here */
-
-	while (eintpnd) {
-		irq = __ffs(eintpnd);
-		eintpnd &= ~(1<<irq);
-
-		irq += (IRQ_EINT4 - 4);
-
-		generic_handle_irq(irq);
-	}
+	chained_irq_exit(chip, desc);
 }
 
 #ifdef CONFIG_FIQ
@@ -519,155 +318,314 @@
 EXPORT_SYMBOL_GPL(s3c24xx_set_fiq);
 #endif
 
+static int s3c24xx_irq_map(struct irq_domain *h, unsigned int virq,
+							irq_hw_number_t hw)
+{
+	struct s3c_irq_intc *intc = h->host_data;
+	struct s3c_irq_data *irq_data = &intc->irqs[hw];
+	struct s3c_irq_intc *parent_intc;
+	struct s3c_irq_data *parent_irq_data;
+	unsigned int irqno;
+
+	if (!intc) {
+		pr_err("irq-s3c24xx: no controller found for hwirq %lu\n", hw);
+		return -EINVAL;
+	}
+
+	if (!irq_data) {
+		pr_err("irq-s3c24xx: no irq data found for hwirq %lu\n", hw);
+		return -EINVAL;
+	}
+
+	/* attach controller pointer to irq_data */
+	irq_data->intc = intc;
+
+	/* set handler and flags */
+	switch (irq_data->type) {
+	case S3C_IRQTYPE_NONE:
+		return 0;
+	case S3C_IRQTYPE_EINT:
+		if (irq_data->parent_irq)
+			irq_set_chip_and_handler(virq, &s3c_irqext_chip,
+						 handle_edge_irq);
+		else
+			irq_set_chip_and_handler(virq, &s3c_irq_eint0t4,
+						 handle_edge_irq);
+		break;
+	case S3C_IRQTYPE_EDGE:
+		if (irq_data->parent_irq)
+			irq_set_chip_and_handler(virq, &s3c_irq_level_chip,
+						 handle_edge_irq);
+		else
+			irq_set_chip_and_handler(virq, &s3c_irq_chip,
+						 handle_edge_irq);
+		break;
+	case S3C_IRQTYPE_LEVEL:
+		if (irq_data->parent_irq)
+			irq_set_chip_and_handler(virq, &s3c_irq_level_chip,
+						 handle_level_irq);
+		else
+			irq_set_chip_and_handler(virq, &s3c_irq_chip,
+						 handle_level_irq);
+		break;
+	default:
+		pr_err("irq-s3c24xx: unsupported irqtype %d\n", irq_data->type);
+		return -EINVAL;
+	}
+	set_irq_flags(virq, IRQF_VALID);
+
+	if (irq_data->parent_irq) {
+		parent_intc = intc->parent;
+		if (!parent_intc) {
+			pr_err("irq-s3c24xx: no parent controller found for hwirq %lu\n",
+			       hw);
+			goto err;
+		}
+
+		parent_irq_data = &parent_intc->irqs[irq_data->parent_irq];
+		if (!irq_data) {
+			pr_err("irq-s3c24xx: no irq data found for hwirq %lu\n",
+			       hw);
+			goto err;
+		}
+
+		parent_irq_data->sub_intc = intc;
+		parent_irq_data->sub_bits |= (1UL << hw);
+
+		/* attach the demuxer to the parent irq */
+		irqno = irq_find_mapping(parent_intc->domain,
+					 irq_data->parent_irq);
+		if (!irqno) {
+			pr_err("irq-s3c24xx: could not find mapping for parent irq %lu\n",
+			       irq_data->parent_irq);
+			goto err;
+		}
+		irq_set_chained_handler(irqno, s3c_irq_demux);
+	}
+
+	return 0;
+
+err:
+	set_irq_flags(virq, 0);
+
+	/* the only error can result from bad mapping data*/
+	return -EINVAL;
+}
+
+static struct irq_domain_ops s3c24xx_irq_ops = {
+	.map = s3c24xx_irq_map,
+	.xlate = irq_domain_xlate_twocell,
+};
+
+static void s3c24xx_clear_intc(struct s3c_irq_intc *intc)
+{
+	void __iomem *reg_source;
+	unsigned long pend;
+	unsigned long last;
+	int i;
+
+	/* if intpnd is set, read the next pending irq from there */
+	reg_source = intc->reg_intpnd ? intc->reg_intpnd : intc->reg_pending;
+
+	last = 0;
+	for (i = 0; i < 4; i++) {
+		pend = __raw_readl(reg_source);
+
+		if (pend == 0 || pend == last)
+			break;
+
+		__raw_writel(pend, intc->reg_pending);
+		if (intc->reg_intpnd)
+			__raw_writel(pend, intc->reg_intpnd);
+
+		pr_info("irq: clearing pending status %08x\n", (int)pend);
+		last = pend;
+	}
+}
+
+struct s3c_irq_intc *s3c24xx_init_intc(struct device_node *np,
+				       struct s3c_irq_data *irq_data,
+				       struct s3c_irq_intc *parent,
+				       unsigned long address)
+{
+	struct s3c_irq_intc *intc;
+	void __iomem *base = (void *)0xf6000000; /* static mapping */
+	int irq_num;
+	int irq_start;
+	int irq_offset;
+	int ret;
+
+	intc = kzalloc(sizeof(struct s3c_irq_intc), GFP_KERNEL);
+	if (!intc)
+		return ERR_PTR(-ENOMEM);
+
+	intc->irqs = irq_data;
+
+	if (parent)
+		intc->parent = parent;
+
+	/* select the correct data for the controller.
+	 * Need to hard code the irq num start and offset
+	 * to preserve the static mapping for now
+	 */
+	switch (address) {
+	case 0x4a000000:
+		pr_debug("irq: found main intc\n");
+		intc->reg_pending = base;
+		intc->reg_mask = base + 0x08;
+		intc->reg_intpnd = base + 0x10;
+		irq_num = 32;
+		irq_start = S3C2410_IRQ(0);
+		irq_offset = 0;
+		break;
+	case 0x4a000018:
+		pr_debug("irq: found subintc\n");
+		intc->reg_pending = base + 0x18;
+		intc->reg_mask = base + 0x1c;
+		irq_num = 29;
+		irq_start = S3C2410_IRQSUB(0);
+		irq_offset = 0;
+		break;
+	case 0x4a000040:
+		pr_debug("irq: found intc2\n");
+		intc->reg_pending = base + 0x40;
+		intc->reg_mask = base + 0x48;
+		intc->reg_intpnd = base + 0x50;
+		irq_num = 8;
+		irq_start = S3C2416_IRQ(0);
+		irq_offset = 0;
+		break;
+	case 0x560000a4:
+		pr_debug("irq: found eintc\n");
+		base = (void *)0xfd000000;
+
+		intc->reg_mask = base + 0xa4;
+		intc->reg_pending = base + 0x08;
+		irq_num = 20;
+		irq_start = S3C2410_IRQ(32);
+		irq_offset = 4;
+		break;
+	default:
+		pr_err("irq: unsupported controller address\n");
+		ret = -EINVAL;
+		goto err;
+	}
+
+	/* now that all the data is complete, init the irq-domain */
+	s3c24xx_clear_intc(intc);
+	intc->domain = irq_domain_add_legacy(np, irq_num, irq_start,
+					     irq_offset, &s3c24xx_irq_ops,
+					     intc);
+	if (!intc->domain) {
+		pr_err("irq: could not create irq-domain\n");
+		ret = -EINVAL;
+		goto err;
+	}
+
+	return intc;
+
+err:
+	kfree(intc);
+	return ERR_PTR(ret);
+}
 
 /* s3c24xx_init_irq
  *
  * Initialise S3C2410 IRQ system
 */
 
+static struct s3c_irq_data init_base[32] = {
+	{ .type = S3C_IRQTYPE_EINT, }, /* EINT0 */
+	{ .type = S3C_IRQTYPE_EINT, }, /* EINT1 */
+	{ .type = S3C_IRQTYPE_EINT, }, /* EINT2 */
+	{ .type = S3C_IRQTYPE_EINT, }, /* EINT3 */
+	{ .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */
+	{ .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */
+	{ .type = S3C_IRQTYPE_NONE, }, /* reserved */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* TICK */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* WDT */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */
+	{ .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* LCD */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* DMA0 */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* DMA1 */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* DMA2 */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* DMA3 */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* SDI */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */
+	{ .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */
+	{ .type = S3C_IRQTYPE_NONE, }, /* reserved */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* USBD */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* USBH */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* IIC */
+	{ .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* SPI1 */
+	{ .type = S3C_IRQTYPE_EDGE, }, /* RTC */
+	{ .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */
+};
+
+static struct s3c_irq_data init_eint[32] = {
+	{ .type = S3C_IRQTYPE_NONE, }, /* reserved */
+	{ .type = S3C_IRQTYPE_NONE, }, /* reserved */
+	{ .type = S3C_IRQTYPE_NONE, }, /* reserved */
+	{ .type = S3C_IRQTYPE_NONE, }, /* reserved */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT4 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT5 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT6 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT7 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT8 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT9 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT10 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT11 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT12 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT13 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT14 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT15 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT16 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT17 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT18 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT19 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT20 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT21 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT22 */
+	{ .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT23 */
+};
+
+static struct s3c_irq_data init_subint[32] = {
+	{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */
+	{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */
+	{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */
+	{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */
+	{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */
+	{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */
+	{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */
+	{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */
+	{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */
+	{ .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */
+	{ .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */
+};
+
 void __init s3c24xx_init_irq(void)
 {
-	unsigned long pend;
-	unsigned long last;
-	int irqno;
-	int i;
+	struct s3c_irq_intc *main_intc;
 
 #ifdef CONFIG_FIQ
 	init_FIQ(FIQ_START);
 #endif
 
-	irqdbf("s3c2410_init_irq: clearing interrupt status flags\n");
-
-	/* first, clear all interrupts pending... */
-
-	last = 0;
-	for (i = 0; i < 4; i++) {
-		pend = __raw_readl(S3C24XX_EINTPEND);
-
-		if (pend == 0 || pend == last)
-			break;
-
-		__raw_writel(pend, S3C24XX_EINTPEND);
-		printk("irq: clearing pending ext status %08x\n", (int)pend);
-		last = pend;
+	main_intc = s3c24xx_init_intc(NULL, &init_base[0], NULL, 0x4a000000);
+	if (IS_ERR(main_intc)) {
+		pr_err("irq: could not create main interrupt controller\n");
+		return;
 	}
 
-	last = 0;
-	for (i = 0; i < 4; i++) {
-		pend = __raw_readl(S3C2410_INTPND);
-
-		if (pend == 0 || pend == last)
-			break;
-
-		__raw_writel(pend, S3C2410_SRCPND);
-		__raw_writel(pend, S3C2410_INTPND);
-		printk("irq: clearing pending status %08x\n", (int)pend);
-		last = pend;
-	}
-
-	last = 0;
-	for (i = 0; i < 4; i++) {
-		pend = __raw_readl(S3C2410_SUBSRCPND);
-
-		if (pend == 0 || pend == last)
-			break;
-
-		printk("irq: clearing subpending status %08x\n", (int)pend);
-		__raw_writel(pend, S3C2410_SUBSRCPND);
-		last = pend;
-	}
-
-	/* register the main interrupts */
-
-	irqdbf("s3c2410_init_irq: registering s3c2410 interrupt handlers\n");
-
-	for (irqno = IRQ_EINT4t7; irqno <= IRQ_ADCPARENT; irqno++) {
-		/* set all the s3c2410 internal irqs */
-
-		switch (irqno) {
-			/* deal with the special IRQs (cascaded) */
-
-		case IRQ_EINT4t7:
-		case IRQ_EINT8t23:
-		case IRQ_UART0:
-		case IRQ_UART1:
-		case IRQ_UART2:
-		case IRQ_ADCPARENT:
-			irq_set_chip_and_handler(irqno, &s3c_irq_level_chip,
-						 handle_level_irq);
-			break;
-
-		case IRQ_RESERVED6:
-		case IRQ_RESERVED24:
-			/* no IRQ here */
-			break;
-
-		default:
-			//irqdbf("registering irq %d (s3c irq)\n", irqno);
-			irq_set_chip_and_handler(irqno, &s3c_irq_chip,
-						 handle_edge_irq);
-			set_irq_flags(irqno, IRQF_VALID);
-		}
-	}
-
-	/* setup the cascade irq handlers */
-
-	irq_set_chained_handler(IRQ_EINT4t7, s3c_irq_demux_extint4t7);
-	irq_set_chained_handler(IRQ_EINT8t23, s3c_irq_demux_extint8);
-
-	irq_set_chained_handler(IRQ_UART0, s3c_irq_demux_uart0);
-	irq_set_chained_handler(IRQ_UART1, s3c_irq_demux_uart1);
-	irq_set_chained_handler(IRQ_UART2, s3c_irq_demux_uart2);
-	irq_set_chained_handler(IRQ_ADCPARENT, s3c_irq_demux_adc);
-
-	/* external interrupts */
-
-	for (irqno = IRQ_EINT0; irqno <= IRQ_EINT3; irqno++) {
-		irqdbf("registering irq %d (ext int)\n", irqno);
-		irq_set_chip_and_handler(irqno, &s3c_irq_eint0t4,
-					 handle_edge_irq);
-		set_irq_flags(irqno, IRQF_VALID);
-	}
-
-	for (irqno = IRQ_EINT4; irqno <= IRQ_EINT23; irqno++) {
-		irqdbf("registering irq %d (extended s3c irq)\n", irqno);
-		irq_set_chip_and_handler(irqno, &s3c_irqext_chip,
-					 handle_edge_irq);
-		set_irq_flags(irqno, IRQF_VALID);
-	}
-
-	/* register the uart interrupts */
-
-	irqdbf("s3c2410: registering external interrupts\n");
-
-	for (irqno = IRQ_S3CUART_RX0; irqno <= IRQ_S3CUART_ERR0; irqno++) {
-		irqdbf("registering irq %d (s3c uart0 irq)\n", irqno);
-		irq_set_chip_and_handler(irqno, &s3c_irq_uart0,
-					 handle_level_irq);
-		set_irq_flags(irqno, IRQF_VALID);
-	}
-
-	for (irqno = IRQ_S3CUART_RX1; irqno <= IRQ_S3CUART_ERR1; irqno++) {
-		irqdbf("registering irq %d (s3c uart1 irq)\n", irqno);
-		irq_set_chip_and_handler(irqno, &s3c_irq_uart1,
-					 handle_level_irq);
-		set_irq_flags(irqno, IRQF_VALID);
-	}
-
-	for (irqno = IRQ_S3CUART_RX2; irqno <= IRQ_S3CUART_ERR2; irqno++) {
-		irqdbf("registering irq %d (s3c uart2 irq)\n", irqno);
-		irq_set_chip_and_handler(irqno, &s3c_irq_uart2,
-					 handle_level_irq);
-		set_irq_flags(irqno, IRQF_VALID);
-	}
-
-	for (irqno = IRQ_TC; irqno <= IRQ_ADC; irqno++) {
-		irqdbf("registering irq %d (s3c adc irq)\n", irqno);
-		irq_set_chip_and_handler(irqno, &s3c_irq_adc, handle_edge_irq);
-		set_irq_flags(irqno, IRQF_VALID);
-	}
-
-	irqdbf("s3c2410: registered interrupt handlers\n");
+	s3c24xx_init_intc(NULL, &init_subint[0], main_intc, 0x4a000018);
+	s3c24xx_init_intc(NULL, &init_eint[0], main_intc, 0x560000a4);
 }
 
 struct syscore_ops s3c24xx_irq_syscore_ops = {