1 files changed, 55 insertions, 0 deletions

diff --git a/arch/arm/mach-mmp/irq.c b/arch/arm/mach-mmp/irq.c
new file mode 100644
index 000000000000..52ff2f065eba
--- /dev/null
+++ b/arch/arm/mach-mmp/irq.c
@@ -0,0 +1,55 @@
+/*
+ *  linux/arch/arm/mach-mmp/irq.c
+ *
+ *  Generic IRQ handling, GPIO IRQ demultiplexing, etc.
+ *
+ *  Author:     Bin Yang <bin.yang@marvell.com>
+ *  Created:    Sep 30, 2008
+ *  Copyright:  Marvell International Ltd.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+
+#include <mach/regs-icu.h>
+
+#include "common.h"
+
+#define IRQ_ROUTE_TO_AP         (ICU_INT_CONF_AP_INT | ICU_INT_CONF_IRQ)
+
+#define PRIORITY_DEFAULT        0x1
+#define PRIORITY_NONE           0x0     /* means IRQ disabled */
+
+static void icu_mask_irq(unsigned int irq)
+{
+        __raw_writel(PRIORITY_NONE, ICU_INT_CONF(irq));
+}
+
+static void icu_unmask_irq(unsigned int irq)
+{
+        __raw_writel(IRQ_ROUTE_TO_AP | PRIORITY_DEFAULT, ICU_INT_CONF(irq));
+}
+
+static struct irq_chip icu_irq_chip = {
+        .name   = "icu_irq",
+        .ack    = icu_mask_irq,
+        .mask   = icu_mask_irq,
+        .unmask = icu_unmask_irq,
+};
+
+void __init icu_init_irq(void)
+{
+        int irq;
+
+        for (irq = 0; irq < 64; irq++) {
+                icu_mask_irq(irq);
+                set_irq_chip(irq, &icu_irq_chip);
+                set_irq_handler(irq, handle_level_irq);
+                set_irq_flags(irq, IRQF_VALID);
+        }
+}