ARM: S3C24XX: move s3c2416 irq init to common irq code
authorHeiko Stuebner <heiko@sntech.de>
Tue, 29 Jan 2013 18:25:22 +0000 (10:25 -0800)
committerKukjin Kim <kgene.kim@samsung.com>
Sun, 3 Feb 2013 23:52:46 +0000 (15:52 -0800)
This is needed to further clean up the irq init.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
arch/arm/mach-s3c24xx/Makefile
arch/arm/mach-s3c24xx/irq-pm.c
arch/arm/mach-s3c24xx/irq-s3c2416.c [deleted file]
arch/arm/plat-s3c24xx/irq.c

index 08b87cdb98b74270b9ddf5678f1982cd4bf2b4b5..68d134f4efa0a9a8e902af8c0d7a100e47f6677a 100644 (file)
@@ -28,7 +28,7 @@ obj-$(CONFIG_S3C2412_DMA)     += dma-s3c2412.o
 obj-$(CONFIG_S3C2412_PM)       += pm-s3c2412.o
 obj-$(CONFIG_S3C2412_PM_SLEEP) += sleep-s3c2412.o
 
-obj-$(CONFIG_CPU_S3C2416)      += s3c2416.o irq-s3c2416.o clock-s3c2416.o
+obj-$(CONFIG_CPU_S3C2416)      += s3c2416.o clock-s3c2416.o
 obj-$(CONFIG_S3C2416_PM)       += pm-s3c2416.o
 
 obj-$(CONFIG_CPU_S3C2440)      += s3c2440.o irq-s3c2440.o clock-s3c2440.o
index 640ec916f4c72f1079d405aba842fc8924000659..e1199599873e0691ed432be5208d7461e1629af4 100644 (file)
@@ -99,3 +99,26 @@ struct syscore_ops s3c24xx_irq_syscore_ops = {
        .suspend        = s3c24xx_irq_suspend,
        .resume         = s3c24xx_irq_resume,
 };
+
+#ifdef CONFIG_CPU_S3C2416
+static struct sleep_save s3c2416_irq_save[] = {
+       SAVE_ITEM(S3C2416_INTMSK2),
+};
+
+static int s3c2416_irq_suspend(void)
+{
+       s3c_pm_do_save(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
+
+       return 0;
+}
+
+static void s3c2416_irq_resume(void)
+{
+       s3c_pm_do_restore(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
+}
+
+struct syscore_ops s3c2416_irq_syscore_ops = {
+       .suspend        = s3c2416_irq_suspend,
+       .resume         = s3c2416_irq_resume,
+};
+#endif
diff --git a/arch/arm/mach-s3c24xx/irq-s3c2416.c b/arch/arm/mach-s3c24xx/irq-s3c2416.c
deleted file mode 100644 (file)
index ff141b0..0000000
+++ /dev/null
@@ -1,348 +0,0 @@
-/* linux/arch/arm/mach-s3c2416/irq.c
- *
- * Copyright (c) 2009 Yauhen Kharuzhy <jekhor@gmail.com>,
- *     as part of OpenInkpot project
- * Copyright (c) 2009 Promwad Innovation Company
- *     Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
- *
- * 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
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * 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/module.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/device.h>
-#include <linux/io.h>
-#include <linux/syscore_ops.h>
-
-#include <mach/hardware.h>
-#include <asm/irq.h>
-
-#include <asm/mach/irq.h>
-
-#include <mach/regs-irq.h>
-#include <mach/regs-gpio.h>
-
-#include <plat/cpu.h>
-#include <plat/pm.h>
-#include <plat/irq.h>
-
-#define INTMSK(start, end) ((1 << ((end) + 1 - (start))) - 1)
-
-static inline void s3c2416_irq_demux(unsigned int irq, unsigned int len)
-{
-       unsigned int subsrc, submsk;
-       unsigned int end;
-
-       /* 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 >>= (irq - S3C2410_IRQSUB(0));
-       subsrc  &= (1 << len)-1;
-
-       end = len + irq;
-
-       for (; irq < end && subsrc; irq++) {
-               if (subsrc & 1)
-                       generic_handle_irq(irq);
-
-               subsrc >>= 1;
-       }
-}
-
-/* WDT/AC97 sub interrupts */
-
-static void s3c2416_irq_demux_wdtac97(unsigned int irq, struct irq_desc *desc)
-{
-       s3c2416_irq_demux(IRQ_S3C2443_WDT, 4);
-}
-
-#define INTMSK_WDTAC97 (1UL << (IRQ_WDT - IRQ_EINT0))
-#define SUBMSK_WDTAC97 INTMSK(IRQ_S3C2443_WDT, IRQ_S3C2443_AC97)
-
-static void s3c2416_irq_wdtac97_mask(struct irq_data *data)
-{
-       s3c_irqsub_mask(data->irq, INTMSK_WDTAC97, SUBMSK_WDTAC97);
-}
-
-static void s3c2416_irq_wdtac97_unmask(struct irq_data *data)
-{
-       s3c_irqsub_unmask(data->irq, INTMSK_WDTAC97);
-}
-
-static void s3c2416_irq_wdtac97_ack(struct irq_data *data)
-{
-       s3c_irqsub_maskack(data->irq, INTMSK_WDTAC97, SUBMSK_WDTAC97);
-}
-
-static struct irq_chip s3c2416_irq_wdtac97 = {
-       .irq_mask       = s3c2416_irq_wdtac97_mask,
-       .irq_unmask     = s3c2416_irq_wdtac97_unmask,
-       .irq_ack        = s3c2416_irq_wdtac97_ack,
-};
-
-/* LCD sub interrupts */
-
-static void s3c2416_irq_demux_lcd(unsigned int irq, struct irq_desc *desc)
-{
-       s3c2416_irq_demux(IRQ_S3C2443_LCD1, 4);
-}
-
-#define INTMSK_LCD     (1UL << (IRQ_LCD - IRQ_EINT0))
-#define SUBMSK_LCD     INTMSK(IRQ_S3C2443_LCD1, IRQ_S3C2443_LCD4)
-
-static void s3c2416_irq_lcd_mask(struct irq_data *data)
-{
-       s3c_irqsub_mask(data->irq, INTMSK_LCD, SUBMSK_LCD);
-}
-
-static void s3c2416_irq_lcd_unmask(struct irq_data *data)
-{
-       s3c_irqsub_unmask(data->irq, INTMSK_LCD);
-}
-
-static void s3c2416_irq_lcd_ack(struct irq_data *data)
-{
-       s3c_irqsub_maskack(data->irq, INTMSK_LCD, SUBMSK_LCD);
-}
-
-static struct irq_chip s3c2416_irq_lcd = {
-       .irq_mask       = s3c2416_irq_lcd_mask,
-       .irq_unmask     = s3c2416_irq_lcd_unmask,
-       .irq_ack        = s3c2416_irq_lcd_ack,
-};
-
-/* DMA sub interrupts */
-
-static void s3c2416_irq_demux_dma(unsigned int irq, struct irq_desc *desc)
-{
-       s3c2416_irq_demux(IRQ_S3C2443_DMA0, 6);
-}
-
-#define INTMSK_DMA     (1UL << (IRQ_S3C2443_DMA - IRQ_EINT0))
-#define SUBMSK_DMA     INTMSK(IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5)
-
-
-static void s3c2416_irq_dma_mask(struct irq_data *data)
-{
-       s3c_irqsub_mask(data->irq, INTMSK_DMA, SUBMSK_DMA);
-}
-
-static void s3c2416_irq_dma_unmask(struct irq_data *data)
-{
-       s3c_irqsub_unmask(data->irq, INTMSK_DMA);
-}
-
-static void s3c2416_irq_dma_ack(struct irq_data *data)
-{
-       s3c_irqsub_maskack(data->irq, INTMSK_DMA, SUBMSK_DMA);
-}
-
-static struct irq_chip s3c2416_irq_dma = {
-       .irq_mask       = s3c2416_irq_dma_mask,
-       .irq_unmask     = s3c2416_irq_dma_unmask,
-       .irq_ack        = s3c2416_irq_dma_ack,
-};
-
-/* UART3 sub interrupts */
-
-static void s3c2416_irq_demux_uart3(unsigned int irq, struct irq_desc *desc)
-{
-       s3c2416_irq_demux(IRQ_S3C2443_RX3, 3);
-}
-
-#define INTMSK_UART3   (1UL << (IRQ_S3C2443_UART3 - IRQ_EINT0))
-#define SUBMSK_UART3   (0x7 << (IRQ_S3C2443_RX3 - S3C2410_IRQSUB(0)))
-
-static void s3c2416_irq_uart3_mask(struct irq_data *data)
-{
-       s3c_irqsub_mask(data->irq, INTMSK_UART3, SUBMSK_UART3);
-}
-
-static void s3c2416_irq_uart3_unmask(struct irq_data *data)
-{
-       s3c_irqsub_unmask(data->irq, INTMSK_UART3);
-}
-
-static void s3c2416_irq_uart3_ack(struct irq_data *data)
-{
-       s3c_irqsub_maskack(data->irq, INTMSK_UART3, SUBMSK_UART3);
-}
-
-static struct irq_chip s3c2416_irq_uart3 = {
-       .irq_mask       = s3c2416_irq_uart3_mask,
-       .irq_unmask     = s3c2416_irq_uart3_unmask,
-       .irq_ack        = s3c2416_irq_uart3_ack,
-};
-
-/* second interrupt register */
-
-static inline void s3c2416_irq_ack_second(struct irq_data *data)
-{
-       unsigned long bitval = 1UL << (data->irq - IRQ_S3C2416_2D);
-
-       __raw_writel(bitval, S3C2416_SRCPND2);
-       __raw_writel(bitval, S3C2416_INTPND2);
-}
-
-static void s3c2416_irq_mask_second(struct irq_data *data)
-{
-       unsigned long bitval = 1UL << (data->irq - IRQ_S3C2416_2D);
-       unsigned long mask;
-
-       mask = __raw_readl(S3C2416_INTMSK2);
-       mask |= bitval;
-       __raw_writel(mask, S3C2416_INTMSK2);
-}
-
-static void s3c2416_irq_unmask_second(struct irq_data *data)
-{
-       unsigned long bitval = 1UL << (data->irq - IRQ_S3C2416_2D);
-       unsigned long mask;
-
-       mask = __raw_readl(S3C2416_INTMSK2);
-       mask &= ~bitval;
-       __raw_writel(mask, S3C2416_INTMSK2);
-}
-
-struct irq_chip s3c2416_irq_second = {
-       .irq_ack        = s3c2416_irq_ack_second,
-       .irq_mask       = s3c2416_irq_mask_second,
-       .irq_unmask     = s3c2416_irq_unmask_second,
-};
-
-
-/* IRQ initialisation code */
-
-static int s3c2416_add_sub(unsigned int base,
-                                  void (*demux)(unsigned int,
-                                                struct irq_desc *),
-                                  struct irq_chip *chip,
-                                  unsigned int start, unsigned int end)
-{
-       unsigned int irqno;
-
-       irq_set_chip_and_handler(base, &s3c_irq_level_chip, handle_level_irq);
-       irq_set_chained_handler(base, demux);
-
-       for (irqno = start; irqno <= end; irqno++) {
-               irq_set_chip_and_handler(irqno, chip, handle_level_irq);
-               set_irq_flags(irqno, IRQF_VALID);
-       }
-
-       return 0;
-}
-
-static void s3c2416_irq_add_second(void)
-{
-       unsigned long pend;
-       unsigned long last;
-       int irqno;
-       int i;
-
-       /* first, clear all interrupts pending... */
-       last = 0;
-       for (i = 0; i < 4; i++) {
-               pend = __raw_readl(S3C2416_INTPND2);
-
-               if (pend == 0 || pend == last)
-                       break;
-
-               __raw_writel(pend, S3C2416_SRCPND2);
-               __raw_writel(pend, S3C2416_INTPND2);
-               printk(KERN_INFO "irq: clearing pending status %08x\n",
-                      (int)pend);
-               last = pend;
-       }
-
-       for (irqno = IRQ_S3C2416_2D; irqno <= IRQ_S3C2416_I2S1; irqno++) {
-               switch (irqno) {
-               case IRQ_S3C2416_RESERVED2:
-               case IRQ_S3C2416_RESERVED3:
-                       /* no IRQ here */
-                       break;
-               default:
-                       irq_set_chip_and_handler(irqno, &s3c2416_irq_second,
-                                                handle_edge_irq);
-                       set_irq_flags(irqno, IRQF_VALID);
-               }
-       }
-}
-
-static int s3c2416_irq_add(struct device *dev,
-                                 struct subsys_interface *sif)
-{
-       printk(KERN_INFO "S3C2416: IRQ Support\n");
-
-       s3c2416_add_sub(IRQ_LCD, s3c2416_irq_demux_lcd, &s3c2416_irq_lcd,
-                       IRQ_S3C2443_LCD2, IRQ_S3C2443_LCD4);
-
-       s3c2416_add_sub(IRQ_S3C2443_DMA, s3c2416_irq_demux_dma,
-                       &s3c2416_irq_dma, IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5);
-
-       s3c2416_add_sub(IRQ_S3C2443_UART3, s3c2416_irq_demux_uart3,
-                       &s3c2416_irq_uart3,
-                       IRQ_S3C2443_RX3, IRQ_S3C2443_ERR3);
-
-       s3c2416_add_sub(IRQ_WDT, s3c2416_irq_demux_wdtac97,
-                       &s3c2416_irq_wdtac97,
-                       IRQ_S3C2443_WDT, IRQ_S3C2443_AC97);
-
-       s3c2416_irq_add_second();
-
-       return 0;
-}
-
-static struct subsys_interface s3c2416_irq_interface = {
-       .name           = "s3c2416_irq",
-       .subsys         = &s3c2416_subsys,
-       .add_dev        = s3c2416_irq_add,
-};
-
-static int __init s3c2416_irq_init(void)
-{
-       return subsys_interface_register(&s3c2416_irq_interface);
-}
-
-arch_initcall(s3c2416_irq_init);
-
-#ifdef CONFIG_PM
-static struct sleep_save irq_save[] = {
-       SAVE_ITEM(S3C2416_INTMSK2),
-};
-
-int s3c2416_irq_suspend(void)
-{
-       s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
-
-       return 0;
-}
-
-void s3c2416_irq_resume(void)
-{
-       s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
-}
-
-struct syscore_ops s3c2416_irq_syscore_ops = {
-       .suspend        = s3c2416_irq_suspend,
-       .resume         = s3c2416_irq_resume,
-};
-#endif
index 259d0e4a532f23b81628a7b38490161fba7d3227..e43214461960f53597c49ab8fb596bb26b5137a5 100644 (file)
@@ -626,3 +626,289 @@ void __init s3c24xx_init_irq(void)
        s3c24xx_init_intc(NULL, &init_subint[0], main_intc, 0x4a000018);
        s3c24xx_init_intc(NULL, &init_eint[0], main_intc, 0x560000a4);
 }
+
+#ifdef CONFIG_CPU_S3C2416
+#define INTMSK(start, end) ((1 << ((end) + 1 - (start))) - 1)
+
+static inline void s3c2416_irq_demux(unsigned int irq, unsigned int len)
+{
+       unsigned int subsrc, submsk;
+       unsigned int end;
+
+       /* 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 >>= (irq - S3C2410_IRQSUB(0));
+       subsrc  &= (1 << len)-1;
+
+       end = len + irq;
+
+       for (; irq < end && subsrc; irq++) {
+               if (subsrc & 1)
+                       generic_handle_irq(irq);
+
+               subsrc >>= 1;
+       }
+}
+
+/* WDT/AC97 sub interrupts */
+
+static void s3c2416_irq_demux_wdtac97(unsigned int irq, struct irq_desc *desc)
+{
+       s3c2416_irq_demux(IRQ_S3C2443_WDT, 4);
+}
+
+#define INTMSK_WDTAC97 (1UL << (IRQ_WDT - IRQ_EINT0))
+#define SUBMSK_WDTAC97 INTMSK(IRQ_S3C2443_WDT, IRQ_S3C2443_AC97)
+
+static void s3c2416_irq_wdtac97_mask(struct irq_data *data)
+{
+       s3c_irqsub_mask(data->irq, INTMSK_WDTAC97, SUBMSK_WDTAC97);
+}
+
+static void s3c2416_irq_wdtac97_unmask(struct irq_data *data)
+{
+       s3c_irqsub_unmask(data->irq, INTMSK_WDTAC97);
+}
+
+static void s3c2416_irq_wdtac97_ack(struct irq_data *data)
+{
+       s3c_irqsub_maskack(data->irq, INTMSK_WDTAC97, SUBMSK_WDTAC97);
+}
+
+static struct irq_chip s3c2416_irq_wdtac97 = {
+       .irq_mask       = s3c2416_irq_wdtac97_mask,
+       .irq_unmask     = s3c2416_irq_wdtac97_unmask,
+       .irq_ack        = s3c2416_irq_wdtac97_ack,
+};
+
+/* LCD sub interrupts */
+
+static void s3c2416_irq_demux_lcd(unsigned int irq, struct irq_desc *desc)
+{
+       s3c2416_irq_demux(IRQ_S3C2443_LCD1, 4);
+}
+
+#define INTMSK_LCD     (1UL << (IRQ_LCD - IRQ_EINT0))
+#define SUBMSK_LCD     INTMSK(IRQ_S3C2443_LCD1, IRQ_S3C2443_LCD4)
+
+static void s3c2416_irq_lcd_mask(struct irq_data *data)
+{
+       s3c_irqsub_mask(data->irq, INTMSK_LCD, SUBMSK_LCD);
+}
+
+static void s3c2416_irq_lcd_unmask(struct irq_data *data)
+{
+       s3c_irqsub_unmask(data->irq, INTMSK_LCD);
+}
+
+static void s3c2416_irq_lcd_ack(struct irq_data *data)
+{
+       s3c_irqsub_maskack(data->irq, INTMSK_LCD, SUBMSK_LCD);
+}
+
+static struct irq_chip s3c2416_irq_lcd = {
+       .irq_mask       = s3c2416_irq_lcd_mask,
+       .irq_unmask     = s3c2416_irq_lcd_unmask,
+       .irq_ack        = s3c2416_irq_lcd_ack,
+};
+
+/* DMA sub interrupts */
+
+static void s3c2416_irq_demux_dma(unsigned int irq, struct irq_desc *desc)
+{
+       s3c2416_irq_demux(IRQ_S3C2443_DMA0, 6);
+}
+
+#define INTMSK_DMA     (1UL << (IRQ_S3C2443_DMA - IRQ_EINT0))
+#define SUBMSK_DMA     INTMSK(IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5)
+
+
+static void s3c2416_irq_dma_mask(struct irq_data *data)
+{
+       s3c_irqsub_mask(data->irq, INTMSK_DMA, SUBMSK_DMA);
+}
+
+static void s3c2416_irq_dma_unmask(struct irq_data *data)
+{
+       s3c_irqsub_unmask(data->irq, INTMSK_DMA);
+}
+
+static void s3c2416_irq_dma_ack(struct irq_data *data)
+{
+       s3c_irqsub_maskack(data->irq, INTMSK_DMA, SUBMSK_DMA);
+}
+
+static struct irq_chip s3c2416_irq_dma = {
+       .irq_mask       = s3c2416_irq_dma_mask,
+       .irq_unmask     = s3c2416_irq_dma_unmask,
+       .irq_ack        = s3c2416_irq_dma_ack,
+};
+
+/* UART3 sub interrupts */
+
+static void s3c2416_irq_demux_uart3(unsigned int irq, struct irq_desc *desc)
+{
+       s3c2416_irq_demux(IRQ_S3C2443_RX3, 3);
+}
+
+#define INTMSK_UART3   (1UL << (IRQ_S3C2443_UART3 - IRQ_EINT0))
+#define SUBMSK_UART3   (0x7 << (IRQ_S3C2443_RX3 - S3C2410_IRQSUB(0)))
+
+static void s3c2416_irq_uart3_mask(struct irq_data *data)
+{
+       s3c_irqsub_mask(data->irq, INTMSK_UART3, SUBMSK_UART3);
+}
+
+static void s3c2416_irq_uart3_unmask(struct irq_data *data)
+{
+       s3c_irqsub_unmask(data->irq, INTMSK_UART3);
+}
+
+static void s3c2416_irq_uart3_ack(struct irq_data *data)
+{
+       s3c_irqsub_maskack(data->irq, INTMSK_UART3, SUBMSK_UART3);
+}
+
+static struct irq_chip s3c2416_irq_uart3 = {
+       .irq_mask       = s3c2416_irq_uart3_mask,
+       .irq_unmask     = s3c2416_irq_uart3_unmask,
+       .irq_ack        = s3c2416_irq_uart3_ack,
+};
+
+/* second interrupt register */
+
+static inline void s3c2416_irq_ack_second(struct irq_data *data)
+{
+       unsigned long bitval = 1UL << (data->irq - IRQ_S3C2416_2D);
+
+       __raw_writel(bitval, S3C2416_SRCPND2);
+       __raw_writel(bitval, S3C2416_INTPND2);
+}
+
+static void s3c2416_irq_mask_second(struct irq_data *data)
+{
+       unsigned long bitval = 1UL << (data->irq - IRQ_S3C2416_2D);
+       unsigned long mask;
+
+       mask = __raw_readl(S3C2416_INTMSK2);
+       mask |= bitval;
+       __raw_writel(mask, S3C2416_INTMSK2);
+}
+
+static void s3c2416_irq_unmask_second(struct irq_data *data)
+{
+       unsigned long bitval = 1UL << (data->irq - IRQ_S3C2416_2D);
+       unsigned long mask;
+
+       mask = __raw_readl(S3C2416_INTMSK2);
+       mask &= ~bitval;
+       __raw_writel(mask, S3C2416_INTMSK2);
+}
+
+static struct irq_chip s3c2416_irq_second = {
+       .irq_ack        = s3c2416_irq_ack_second,
+       .irq_mask       = s3c2416_irq_mask_second,
+       .irq_unmask     = s3c2416_irq_unmask_second,
+};
+
+
+/* IRQ initialisation code */
+
+static int s3c2416_add_sub(unsigned int base,
+                                  void (*demux)(unsigned int,
+                                                struct irq_desc *),
+                                  struct irq_chip *chip,
+                                  unsigned int start, unsigned int end)
+{
+       unsigned int irqno;
+
+       irq_set_chip_and_handler(base, &s3c_irq_level_chip, handle_level_irq);
+       irq_set_chained_handler(base, demux);
+
+       for (irqno = start; irqno <= end; irqno++) {
+               irq_set_chip_and_handler(irqno, chip, handle_level_irq);
+               set_irq_flags(irqno, IRQF_VALID);
+       }
+
+       return 0;
+}
+
+static void s3c2416_irq_add_second(void)
+{
+       unsigned long pend;
+       unsigned long last;
+       int irqno;
+       int i;
+
+       /* first, clear all interrupts pending... */
+       last = 0;
+       for (i = 0; i < 4; i++) {
+               pend = __raw_readl(S3C2416_INTPND2);
+
+               if (pend == 0 || pend == last)
+                       break;
+
+               __raw_writel(pend, S3C2416_SRCPND2);
+               __raw_writel(pend, S3C2416_INTPND2);
+               printk(KERN_INFO "irq: clearing pending status %08x\n",
+                      (int)pend);
+               last = pend;
+       }
+
+       for (irqno = IRQ_S3C2416_2D; irqno <= IRQ_S3C2416_I2S1; irqno++) {
+               switch (irqno) {
+               case IRQ_S3C2416_RESERVED2:
+               case IRQ_S3C2416_RESERVED3:
+                       /* no IRQ here */
+                       break;
+               default:
+                       irq_set_chip_and_handler(irqno, &s3c2416_irq_second,
+                                                handle_edge_irq);
+                       set_irq_flags(irqno, IRQF_VALID);
+               }
+       }
+}
+
+static int s3c2416_irq_add(struct device *dev,
+                                 struct subsys_interface *sif)
+{
+       printk(KERN_INFO "S3C2416: IRQ Support\n");
+
+       s3c2416_add_sub(IRQ_LCD, s3c2416_irq_demux_lcd, &s3c2416_irq_lcd,
+                       IRQ_S3C2443_LCD2, IRQ_S3C2443_LCD4);
+
+       s3c2416_add_sub(IRQ_S3C2443_DMA, s3c2416_irq_demux_dma,
+                       &s3c2416_irq_dma, IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5);
+
+       s3c2416_add_sub(IRQ_S3C2443_UART3, s3c2416_irq_demux_uart3,
+                       &s3c2416_irq_uart3,
+                       IRQ_S3C2443_RX3, IRQ_S3C2443_ERR3);
+
+       s3c2416_add_sub(IRQ_WDT, s3c2416_irq_demux_wdtac97,
+                       &s3c2416_irq_wdtac97,
+                       IRQ_S3C2443_WDT, IRQ_S3C2443_AC97);
+
+       s3c2416_irq_add_second();
+
+       return 0;
+}
+
+static struct subsys_interface s3c2416_irq_interface = {
+       .name           = "s3c2416_irq",
+       .subsys         = &s3c2416_subsys,
+       .add_dev        = s3c2416_irq_add,
+};
+
+static int __init s3c2416_irq_init(void)
+{
+       return subsys_interface_register(&s3c2416_irq_interface);
+}
+
+arch_initcall(s3c2416_irq_init);
+
+#endif