10 files changed, 244 insertions, 168 deletions

diff --git a/arch/sh/boards/Kconfig b/arch/sh/boards/Kconfig
index 1f56b35d3248..7048c03490d9 100644
--- a/arch/sh/boards/Kconfig
+++ b/arch/sh/boards/Kconfig
@@ -44,6 +44,8 @@ config SH_7721_SOLUTION_ENGINE
 config SH_7722_SOLUTION_ENGINE
         bool "SolutionEngine7722"
         select SOLUTION_ENGINE
+        select GENERIC_IRQ_CHIP
+        select IRQ_DOMAIN
         depends on CPU_SUBTYPE_SH7722
         help
           Select 7722 SolutionEngine if configuring for a Hitachi SH772
@@ -80,6 +82,8 @@ config SH_7780_SOLUTION_ENGINE
 config SH_7343_SOLUTION_ENGINE
         bool "SolutionEngine7343"
         select SOLUTION_ENGINE
+        select GENERIC_IRQ_CHIP
+        select IRQ_DOMAIN
         depends on CPU_SUBTYPE_SH7343
         help
           Select 7343 SolutionEngine if configuring for a Hitachi
@@ -295,6 +299,7 @@ config SH_X3PROTO
         bool "SH-X3 Prototype board"
         depends on CPU_SUBTYPE_SHX3
         select NO_IOPORT if !PCI
+        select IRQ_DOMAIN
 
 config SH_MAGIC_PANEL_R2
         bool "Magic Panel R2"
diff --git a/arch/sh/boards/board-polaris.c b/arch/sh/boards/board-polaris.c
index 37d03c097ae9..0978ae2e4847 100644
--- a/arch/sh/boards/board-polaris.c
+++ b/arch/sh/boards/board-polaris.c
@@ -1,5 +1,5 @@
 /*
- * June 2006 steve.glendinning@smsc.com
+ * June 2006 Steve Glendinning <steve.glendinning@shawell.net>
  *
  * Polaris-specific resource declaration
  *
diff --git a/arch/sh/boards/mach-dreamcast/irq.c b/arch/sh/boards/mach-dreamcast/irq.c
index f63d323f411f..2789647abebe 100644
--- a/arch/sh/boards/mach-dreamcast/irq.c
+++ b/arch/sh/boards/mach-dreamcast/irq.c
@@ -8,10 +8,11 @@
  * This file is part of the LinuxDC project (www.linuxdc.org)
  * Released under the terms of the GNU GPL v2.0
  */
-
 #include <linux/irq.h>
 #include <linux/io.h>
-#include <asm/irq.h>
+#include <linux/irq.h>
+#include <linux/export.h>
+#include <linux/err.h>
 #include <mach/sysasic.h>
 
 /*
@@ -141,26 +142,15 @@ int systemasic_irq_demux(int irq)
 
 void systemasic_irq_init(void)
 {
-        int i, nid = cpu_to_node(boot_cpu_data);
-
-        /* Assign all virtual IRQs to the System ASIC int. handler */
-        for (i = HW_EVENT_IRQ_BASE; i < HW_EVENT_IRQ_MAX; i++) {
-                unsigned int irq;
-
-                irq = create_irq_nr(i, nid);
-                if (unlikely(irq == 0)) {
-                        pr_err("%s: failed hooking irq %d for systemasic\n",
-                               __func__, i);
-                        return;
-                }
+        int irq_base, i;
 
-                if (unlikely(irq != i)) {
-                        pr_err("%s: got irq %d but wanted %d, bailing.\n",
-                               __func__, irq, i);
-                        destroy_irq(irq);
-                        return;
-                }
+        irq_base = irq_alloc_descs(HW_EVENT_IRQ_BASE, HW_EVENT_IRQ_BASE,
+                                   HW_EVENT_IRQ_MAX - HW_EVENT_IRQ_BASE, -1);
+        if (IS_ERR_VALUE(irq_base)) {
+                pr_err("%s: failed hooking irqs\n", __func__);
+                return;
+        }
 
+        for (i = HW_EVENT_IRQ_BASE; i < HW_EVENT_IRQ_MAX; i++)
                 irq_set_chip_and_handler(i, &systemasic_int, handle_level_irq);
-        }
 }
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c
index 158c9176e42a..43a179ce9afc 100644
--- a/arch/sh/boards/mach-kfr2r09/setup.c
+++ b/arch/sh/boards/mach-kfr2r09/setup.c
@@ -201,8 +201,8 @@ static struct resource kfr2r09_usb0_gadget_resources[] = {
                 .flags  = IORESOURCE_MEM,
         },
         [1] = {
-                .start  = evtirq(0xa20),
-                .end    = evtirq(0xa20),
+                .start  = evt2irq(0xa20),
+                .end    = evt2irq(0xa20),
                 .flags  = IORESOURCE_IRQ | IRQF_TRIGGER_LOW,
         },
 };
diff --git a/arch/sh/boards/mach-se/7343/irq.c b/arch/sh/boards/mach-se/7343/irq.c
index fd45ffc48340..7646bf0486c2 100644
--- a/arch/sh/boards/mach-se/7343/irq.c
+++ b/arch/sh/boards/mach-se/7343/irq.c
@@ -1,86 +1,129 @@
 /*
- * linux/arch/sh/boards/se/7343/irq.c
+ * Hitachi UL SolutionEngine 7343 FPGA IRQ Support.
  *
  * Copyright (C) 2008  Yoshihiro Shimoda
+ * Copyright (C) 2012  Paul Mundt
  *
- * Based on linux/arch/sh/boards/se/7722/irq.c
+ * Based on linux/arch/sh/boards/se/7343/irq.c
  * Copyright (C) 2007  Nobuhiro Iwamatsu
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  */
+#define DRV_NAME "SE7343-FPGA"
+#define pr_fmt(fmt) DRV_NAME ": " fmt
+
+#define irq_reg_readl   ioread16
+#define irq_reg_writel  iowrite16
+
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
+#include <linux/irqdomain.h>
 #include <linux/io.h>
+#include <asm/sizes.h>
 #include <mach-se/mach/se7343.h>
 
-unsigned int se7343_fpga_irq[SE7343_FPGA_IRQ_NR] = { 0, };
+#define PA_CPLD_BASE_ADDR       0x11400000
+#define PA_CPLD_ST_REG          0x08    /* CPLD Interrupt status register */
+#define PA_CPLD_IMSK_REG        0x0a    /* CPLD Interrupt mask register */
 
-static void disable_se7343_irq(struct irq_data *data)
-{
-        unsigned int bit = (unsigned int)irq_data_get_irq_chip_data(data);
-        __raw_writew(__raw_readw(PA_CPLD_IMSK) | 1 << bit, PA_CPLD_IMSK);
-}
+static void __iomem *se7343_irq_regs;
+struct irq_domain *se7343_irq_domain;
 
-static void enable_se7343_irq(struct irq_data *data)
+static void se7343_irq_demux(unsigned int irq, struct irq_desc *desc)
 {
-        unsigned int bit = (unsigned int)irq_data_get_irq_chip_data(data);
-        __raw_writew(__raw_readw(PA_CPLD_IMSK) & ~(1 << bit), PA_CPLD_IMSK);
-}
+        struct irq_data *data = irq_get_irq_data(irq);
+        struct irq_chip *chip = irq_data_get_irq_chip(data);
+        unsigned long mask;
+        int bit;
 
-static struct irq_chip se7343_irq_chip __read_mostly = {
-        .name           = "SE7343-FPGA",
-        .irq_mask       = disable_se7343_irq,
-        .irq_unmask     = enable_se7343_irq,
-};
+        chip->irq_mask_ack(data);
 
-static void se7343_irq_demux(unsigned int irq, struct irq_desc *desc)
+        mask = ioread16(se7343_irq_regs + PA_CPLD_ST_REG);
+
+        for_each_set_bit(bit, &mask, SE7343_FPGA_IRQ_NR)
+                generic_handle_irq(irq_linear_revmap(se7343_irq_domain, bit));
+
+        chip->irq_unmask(data);
+}
+
+static void __init se7343_domain_init(void)
 {
-        unsigned short intv = __raw_readw(PA_CPLD_ST);
-        unsigned int ext_irq = 0;
+        int i;
 
-        intv &= (1 << SE7343_FPGA_IRQ_NR) - 1;
+        se7343_irq_domain = irq_domain_add_linear(NULL, SE7343_FPGA_IRQ_NR,
+                                                  &irq_domain_simple_ops, NULL);
+        if (unlikely(!se7343_irq_domain)) {
+                printk("Failed to get IRQ domain\n");
+                return;
+        }
 
-        for (; intv; intv >>= 1, ext_irq++) {
-                if (!(intv & 1))
-                        continue;
+        for (i = 0; i < SE7343_FPGA_IRQ_NR; i++) {
+                int irq = irq_create_mapping(se7343_irq_domain, i);
 
-                generic_handle_irq(se7343_fpga_irq[ext_irq]);
+                if (unlikely(irq == 0)) {
+                        printk("Failed to allocate IRQ %d\n", i);
+                        return;
+                }
         }
 }
 
-/*
- * Initialize IRQ setting
- */
-void __init init_7343se_IRQ(void)
+static void __init se7343_gc_init(void)
 {
-        int i, irq;
+        struct irq_chip_generic *gc;
+        struct irq_chip_type *ct;
+        unsigned int irq_base;
 
-        __raw_writew(0, PA_CPLD_IMSK);  /* disable all irqs */
-        __raw_writew(0x2000, 0xb03fffec);       /* mrshpc irq enable */
+        irq_base = irq_linear_revmap(se7343_irq_domain, 0);
 
-        for (i = 0; i < SE7343_FPGA_IRQ_NR; i++) {
-                irq = create_irq();
-                if (irq < 0)
-                        return;
-                se7343_fpga_irq[i] = irq;
+        gc = irq_alloc_generic_chip(DRV_NAME, 1, irq_base, se7343_irq_regs,
+                                    handle_level_irq);
+        if (unlikely(!gc))
+                return;
 
-                irq_set_chip_and_handler_name(se7343_fpga_irq[i],
-                                              &se7343_irq_chip,
-                                              handle_level_irq,
-                                              "level");
+        ct = gc->chip_types;
+        ct->chip.irq_mask = irq_gc_mask_set_bit;
+        ct->chip.irq_unmask = irq_gc_mask_clr_bit;
 
-                irq_set_chip_data(se7343_fpga_irq[i], (void *)i);
-        }
+        ct->regs.mask = PA_CPLD_IMSK_REG;
+
+        irq_setup_generic_chip(gc, IRQ_MSK(SE7343_FPGA_IRQ_NR),
+                               IRQ_GC_INIT_MASK_CACHE,
+                               IRQ_NOREQUEST | IRQ_NOPROBE, 0);
 
         irq_set_chained_handler(IRQ0_IRQ, se7343_irq_demux);
         irq_set_irq_type(IRQ0_IRQ, IRQ_TYPE_LEVEL_LOW);
+
         irq_set_chained_handler(IRQ1_IRQ, se7343_irq_demux);
         irq_set_irq_type(IRQ1_IRQ, IRQ_TYPE_LEVEL_LOW);
+
         irq_set_chained_handler(IRQ4_IRQ, se7343_irq_demux);
         irq_set_irq_type(IRQ4_IRQ, IRQ_TYPE_LEVEL_LOW);
+
         irq_set_chained_handler(IRQ5_IRQ, se7343_irq_demux);
         irq_set_irq_type(IRQ5_IRQ, IRQ_TYPE_LEVEL_LOW);
 }
+
+/*
+ * Initialize IRQ setting
+ */
+void __init init_7343se_IRQ(void)
+{
+        se7343_irq_regs = ioremap(PA_CPLD_BASE_ADDR, SZ_16);
+        if (unlikely(!se7343_irq_regs)) {
+                pr_err("Failed to remap CPLD\n");
+                return;
+        }
+
+        /*
+         * All FPGA IRQs disabled by default
+         */
+        iowrite16(0, se7343_irq_regs + PA_CPLD_IMSK_REG);
+
+        __raw_writew(0x2000, 0xb03fffec);       /* mrshpc irq enable */
+
+        se7343_domain_init();
+        se7343_gc_init();
+}
diff --git a/arch/sh/boards/mach-se/7343/setup.c b/arch/sh/boards/mach-se/7343/setup.c
index d2370af56d77..8ce4f2a202a8 100644
--- a/arch/sh/boards/mach-se/7343/setup.c
+++ b/arch/sh/boards/mach-se/7343/setup.c
@@ -5,6 +5,7 @@
 #include <linux/serial_reg.h>
 #include <linux/usb/isp116x.h>
 #include <linux/delay.h>
+#include <linux/irqdomain.h>
 #include <asm/machvec.h>
 #include <mach-se/mach/se7343.h>
 #include <asm/heartbeat.h>
@@ -145,11 +146,12 @@ static struct platform_device *sh7343se_platform_devices[] __initdata = {
 static int __init sh7343se_devices_setup(void)
 {
         /* Wire-up dynamic vectors */
-        serial_platform_data[0].irq = se7343_fpga_irq[SE7343_FPGA_IRQ_UARTA];
-        serial_platform_data[1].irq = se7343_fpga_irq[SE7343_FPGA_IRQ_UARTB];
-
+        serial_platform_data[0].irq = irq_find_mapping(se7343_irq_domain,
+                                                       SE7343_FPGA_IRQ_UARTA);
+        serial_platform_data[1].irq = irq_find_mapping(se7343_irq_domain,
+                                                       SE7343_FPGA_IRQ_UARTB);
         usb_resources[2].start = usb_resources[2].end =
-                se7343_fpga_irq[SE7343_FPGA_IRQ_USB];
+                irq_find_mapping(se7343_irq_domain, SE7343_FPGA_IRQ_USB);
 
         return platform_add_devices(sh7343se_platform_devices,
                                     ARRAY_SIZE(sh7343se_platform_devices));
diff --git a/arch/sh/boards/mach-se/7722/irq.c b/arch/sh/boards/mach-se/7722/irq.c
index aac92f21ebd2..f5e2af1bf040 100644
--- a/arch/sh/boards/mach-se/7722/irq.c
+++ b/arch/sh/boards/mach-se/7722/irq.c
@@ -1,79 +1,96 @@
 /*
- * linux/arch/sh/boards/se/7722/irq.c
+ * Hitachi UL SolutionEngine 7722 FPGA IRQ Support.
  *
  * Copyright (C) 2007  Nobuhiro Iwamatsu
- *
- * Hitachi UL SolutionEngine 7722 Support.
+ * Copyright (C) 2012  Paul Mundt
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  */
+#define DRV_NAME "SE7722-FPGA"
+#define pr_fmt(fmt) DRV_NAME ": " fmt
+
+#define irq_reg_readl   ioread16
+#define irq_reg_writel  iowrite16
+
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
-#include <asm/irq.h>
-#include <asm/io.h>
+#include <linux/irqdomain.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <asm/sizes.h>
 #include <mach-se/mach/se7722.h>
 
-unsigned int se7722_fpga_irq[SE7722_FPGA_IRQ_NR] = { 0, };
+#define IRQ01_BASE_ADDR 0x11800000
+#define IRQ01_MODE_REG  0
+#define IRQ01_STS_REG   4
+#define IRQ01_MASK_REG  8
 
-static void disable_se7722_irq(struct irq_data *data)
-{
-        unsigned int bit = (unsigned int)irq_data_get_irq_chip_data(data);
-        __raw_writew(__raw_readw(IRQ01_MASK) | 1 << bit, IRQ01_MASK);
-}
+static void __iomem *se7722_irq_regs;
+struct irq_domain *se7722_irq_domain;
 
-static void enable_se7722_irq(struct irq_data *data)
+static void se7722_irq_demux(unsigned int irq, struct irq_desc *desc)
 {
-        unsigned int bit = (unsigned int)irq_data_get_irq_chip_data(data);
-        __raw_writew(__raw_readw(IRQ01_MASK) & ~(1 << bit), IRQ01_MASK);
-}
+        struct irq_data *data = irq_get_irq_data(irq);
+        struct irq_chip *chip = irq_data_get_irq_chip(data);
+        unsigned long mask;
+        int bit;
 
-static struct irq_chip se7722_irq_chip __read_mostly = {
-        .name           = "SE7722-FPGA",
-        .irq_mask       = disable_se7722_irq,
-        .irq_unmask     = enable_se7722_irq,
-};
+        chip->irq_mask_ack(data);
 
-static void se7722_irq_demux(unsigned int irq, struct irq_desc *desc)
+        mask = ioread16(se7722_irq_regs + IRQ01_STS_REG);
+
+        for_each_set_bit(bit, &mask, SE7722_FPGA_IRQ_NR)
+                generic_handle_irq(irq_linear_revmap(se7722_irq_domain, bit));
+
+        chip->irq_unmask(data);
+}
+
+static void __init se7722_domain_init(void)
 {
-        unsigned short intv = __raw_readw(IRQ01_STS);
-        unsigned int ext_irq = 0;
+        int i;
 
-        intv &= (1 << SE7722_FPGA_IRQ_NR) - 1;
+        se7722_irq_domain = irq_domain_add_linear(NULL, SE7722_FPGA_IRQ_NR,
+                                                  &irq_domain_simple_ops, NULL);
+        if (unlikely(!se7722_irq_domain)) {
+                printk("Failed to get IRQ domain\n");
+                return;
+        }
 
-        for (; intv; intv >>= 1, ext_irq++) {
-                if (!(intv & 1))
-                        continue;
+        for (i = 0; i < SE7722_FPGA_IRQ_NR; i++) {
+                int irq = irq_create_mapping(se7722_irq_domain, i);
 
-                generic_handle_irq(se7722_fpga_irq[ext_irq]);
+                if (unlikely(irq == 0)) {
+                        printk("Failed to allocate IRQ %d\n", i);
+                        return;
+                }
         }
 }
 
-/*
- * Initialize IRQ setting
- */
-void __init init_se7722_IRQ(void)
+static void __init se7722_gc_init(void)
 {
-        int i, irq;
+        struct irq_chip_generic *gc;
+        struct irq_chip_type *ct;
+        unsigned int irq_base;
 
-        __raw_writew(0, IRQ01_MASK);       /* disable all irqs */
-        __raw_writew(0x2000, 0xb03fffec);  /* mrshpc irq enable */
+        irq_base = irq_linear_revmap(se7722_irq_domain, 0);
 
-        for (i = 0; i < SE7722_FPGA_IRQ_NR; i++) {
-                irq = create_irq();
-                if (irq < 0)
-                        return;
-                se7722_fpga_irq[i] = irq;
+        gc = irq_alloc_generic_chip(DRV_NAME, 1, irq_base, se7722_irq_regs,
+                                    handle_level_irq);
+        if (unlikely(!gc))
+                return;
 
-                irq_set_chip_and_handler_name(se7722_fpga_irq[i],
-                                              &se7722_irq_chip,
-                                              handle_level_irq,
-                                              "level");
+        ct = gc->chip_types;
+        ct->chip.irq_mask = irq_gc_mask_set_bit;
+        ct->chip.irq_unmask = irq_gc_mask_clr_bit;
 
-                irq_set_chip_data(se7722_fpga_irq[i], (void *)i);
-        }
+        ct->regs.mask = IRQ01_MASK_REG;
+
+        irq_setup_generic_chip(gc, IRQ_MSK(SE7722_FPGA_IRQ_NR),
+                               IRQ_GC_INIT_MASK_CACHE,
+                               IRQ_NOREQUEST | IRQ_NOPROBE, 0);
 
         irq_set_chained_handler(IRQ0_IRQ, se7722_irq_demux);
         irq_set_irq_type(IRQ0_IRQ, IRQ_TYPE_LEVEL_LOW);
@@ -81,3 +98,25 @@ void __init init_se7722_IRQ(void)
         irq_set_chained_handler(IRQ1_IRQ, se7722_irq_demux);
         irq_set_irq_type(IRQ1_IRQ, IRQ_TYPE_LEVEL_LOW);
 }
+
+/*
+ * Initialize FPGA IRQs
+ */
+void __init init_se7722_IRQ(void)
+{
+        se7722_irq_regs = ioremap(IRQ01_BASE_ADDR, SZ_16);
+        if (unlikely(!se7722_irq_regs)) {
+                printk("Failed to remap IRQ01 regs\n");
+                return;
+        }
+
+        /*
+         * All FPGA IRQs disabled by default
+         */
+        iowrite16(0, se7722_irq_regs + IRQ01_MASK_REG);
+
+        __raw_writew(0x2000, 0xb03fffec);  /* mrshpc irq enable */
+
+        se7722_domain_init();
+        se7722_gc_init();
+}
diff --git a/arch/sh/boards/mach-se/7722/setup.c b/arch/sh/boards/mach-se/7722/setup.c
index 8f7f0550cfde..e04e2bc46984 100644
--- a/arch/sh/boards/mach-se/7722/setup.c
+++ b/arch/sh/boards/mach-se/7722/setup.c
@@ -2,6 +2,7 @@
  * linux/arch/sh/boards/se/7722/setup.c
  *
  * Copyright (C) 2007 Nobuhiro Iwamatsu
+ * Copyright (C) 2012 Paul Mundt
  *
  * Hitachi UL SolutionEngine 7722 Support.
  *
@@ -15,6 +16,7 @@
 #include <linux/ata_platform.h>
 #include <linux/input.h>
 #include <linux/input/sh_keysc.h>
+#include <linux/irqdomain.h>
 #include <linux/smc91x.h>
 #include <linux/sh_intc.h>
 #include <mach-se/mach/se7722.h>
@@ -143,10 +145,10 @@ static int __init se7722_devices_setup(void)
 
         /* Wire-up dynamic vectors */
         cf_ide_resources[2].start = cf_ide_resources[2].end =
-                se7722_fpga_irq[SE7722_FPGA_IRQ_MRSHPC0];
+                irq_find_mapping(se7722_irq_domain, SE7722_FPGA_IRQ_MRSHPC0);
 
         smc91x_eth_resources[1].start = smc91x_eth_resources[1].end =
-                se7722_fpga_irq[SE7722_FPGA_IRQ_SMC];
+                irq_find_mapping(se7722_irq_domain, SE7722_FPGA_IRQ_SMC);
 
         return platform_add_devices(se7722_devices, ARRAY_SIZE(se7722_devices));
 }
diff --git a/arch/sh/boards/mach-se/7724/irq.c b/arch/sh/boards/mach-se/7724/irq.c
index c6342ce7768d..5d1d3ec9a6cd 100644
--- a/arch/sh/boards/mach-se/7724/irq.c
+++ b/arch/sh/boards/mach-se/7724/irq.c
@@ -17,8 +17,10 @@
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
-#include <asm/irq.h>
-#include <asm/io.h>
+#include <linux/export.h>
+#include <linux/topology.h>
+#include <linux/io.h>
+#include <linux/err.h>
 #include <mach-se/mach/se7724.h>
 
 struct fpga_irq {
@@ -111,7 +113,7 @@ static void se7724_irq_demux(unsigned int irq, struct irq_desc *desc)
  */
 void __init init_se7724_IRQ(void)
 {
-        int i, nid = cpu_to_node(boot_cpu_data);
+        int irq_base, i;
 
         __raw_writew(0xffff, IRQ0_MR);  /* mask all */
         __raw_writew(0xffff, IRQ1_MR);  /* mask all */
@@ -121,28 +123,16 @@ void __init init_se7724_IRQ(void)
         __raw_writew(0x0000, IRQ2_SR);  /* clear irq */
         __raw_writew(0x002a, IRQ_MODE); /* set irq type */
 
-        for (i = 0; i < SE7724_FPGA_IRQ_NR; i++) {
-                int irq, wanted;
-
-                wanted = SE7724_FPGA_IRQ_BASE + i;
-
-                irq = create_irq_nr(wanted, nid);
-                if (unlikely(irq == 0)) {
-                        pr_err("%s: failed hooking irq %d for FPGA\n",
-                               __func__, wanted);
-                        return;
-                }
-
-                if (unlikely(irq != wanted)) {
-                        pr_err("%s: got irq %d but wanted %d, bailing.\n",
-                               __func__, irq, wanted);
-                        destroy_irq(irq);
-                        return;
-                }
+        irq_base = irq_alloc_descs(SE7724_FPGA_IRQ_BASE, SE7724_FPGA_IRQ_BASE,
+                                   SE7724_FPGA_IRQ_NR, numa_node_id());
+        if (IS_ERR_VALUE(irq_base)) {
+                pr_err("%s: failed hooking irqs for FPGA\n", __func__);
+                return;
+        }
 
-                irq_set_chip_and_handler_name(irq, &se7724_irq_chip,
+        for (i = 0; i < SE7724_FPGA_IRQ_NR; i++)
+                irq_set_chip_and_handler_name(irq_base + i, &se7724_irq_chip,
                                               handle_level_irq, "level");
-        }
 
         irq_set_chained_handler(IRQ0_IRQ, se7724_irq_demux);
         irq_set_irq_type(IRQ0_IRQ, IRQ_TYPE_LEVEL_LOW);
diff --git a/arch/sh/boards/mach-x3proto/gpio.c b/arch/sh/boards/mach-x3proto/gpio.c
index f33b2b57019c..3ea65e9b56e8 100644
--- a/arch/sh/boards/mach-x3proto/gpio.c
+++ b/arch/sh/boards/mach-x3proto/gpio.c
@@ -3,7 +3,7 @@
  *
  * Renesas SH-X3 Prototype Baseboard GPIO Support.
  *
- * Copyright (C) 2010  Paul Mundt
+ * Copyright (C) 2010 - 2012  Paul Mundt
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -17,6 +17,7 @@
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/spinlock.h>
+#include <linux/irqdomain.h>
 #include <linux/io.h>
 #include <mach/ilsel.h>
 #include <mach/hardware.h>
@@ -26,7 +27,7 @@
 #define KEYDETR 0xb81c0004
 
 static DEFINE_SPINLOCK(x3proto_gpio_lock);
-static unsigned int x3proto_gpio_irq_map[NR_BASEBOARD_GPIOS] = { 0, };
+static struct irq_domain *x3proto_irq_domain;
 
 static int x3proto_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
 {
@@ -49,7 +50,14 @@ static int x3proto_gpio_get(struct gpio_chip *chip, unsigned gpio)
 
 static int x3proto_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
 {
-        return x3proto_gpio_irq_map[gpio];
+        int virq;
+
+        if (gpio < chip->ngpio)
+                virq = irq_create_mapping(x3proto_irq_domain, gpio);
+        else
+                virq = -ENXIO;
+
+        return virq;
 }
 
 static void x3proto_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
@@ -62,9 +70,8 @@ static void x3proto_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
         chip->irq_mask_ack(data);
 
         mask = __raw_readw(KEYDETR);
-
         for_each_set_bit(pin, &mask, NR_BASEBOARD_GPIOS)
-                generic_handle_irq(x3proto_gpio_to_irq(NULL, pin));
+                generic_handle_irq(irq_linear_revmap(x3proto_irq_domain, pin));
 
         chip->irq_unmask(data);
 }
@@ -78,10 +85,23 @@ struct gpio_chip x3proto_gpio_chip = {
         .ngpio                  = NR_BASEBOARD_GPIOS,
 };
 
+static int x3proto_gpio_irq_map(struct irq_domain *domain, unsigned int virq,
+                                irq_hw_number_t hwirq)
+{
+        irq_set_chip_and_handler_name(virq, &dummy_irq_chip, handle_simple_irq,
+                                      "gpio");
+
+        return 0;
+}
+
+static struct irq_domain_ops x3proto_gpio_irq_ops = {
+        .map    = x3proto_gpio_irq_map,
+        .xlate  = irq_domain_xlate_twocell,
+};
+
 int __init x3proto_gpio_setup(void)
 {
-        int ilsel;
-        int ret, i;
+        int ilsel, ret;
 
         ilsel = ilsel_enable(ILSEL_KEY);
         if (unlikely(ilsel < 0))
@@ -91,21 +111,10 @@ int __init x3proto_gpio_setup(void)
         if (unlikely(ret))
                 goto err_gpio;
 
-        for (i = 0; i < NR_BASEBOARD_GPIOS; i++) {
-                unsigned long flags;
-                int irq = create_irq();
-
-                if (unlikely(irq < 0)) {
-                        ret = -EINVAL;
-                        goto err_irq;
-                }
-
-                spin_lock_irqsave(&x3proto_gpio_lock, flags);
-                x3proto_gpio_irq_map[i] = irq;
-                irq_set_chip_and_handler_name(irq, &dummy_irq_chip,
-                                              handle_simple_irq, "gpio");
-                spin_unlock_irqrestore(&x3proto_gpio_lock, flags);
-        }
+        x3proto_irq_domain = irq_domain_add_linear(NULL, NR_BASEBOARD_GPIOS,
+                                                   &x3proto_gpio_irq_ops, NULL);
+        if (unlikely(!x3proto_irq_domain))
+                goto err_irq;
 
         pr_info("registering '%s' support, handling GPIOs %u -> %u, "
                 "bound to IRQ %u\n",
@@ -119,10 +128,6 @@ int __init x3proto_gpio_setup(void)
         return 0;
 
 err_irq:
-        for (; i >= 0; --i)
-                if (x3proto_gpio_irq_map[i])
-                        destroy_irq(x3proto_gpio_irq_map[i]);
-
         ret = gpiochip_remove(&x3proto_gpio_chip);
         if (unlikely(ret))
                 pr_err("Failed deregistering GPIO\n");