zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/arch/arm/mach-mmp/irq-pxa168.c b/ap/os/linux/linux-3.4.x/arch/arm/mach-mmp/irq-pxa168.c
new file mode 100644
index 0000000..89706a0
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/arch/arm/mach-mmp/irq-pxa168.c
@@ -0,0 +1,54 @@
+/*
+ * 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(struct irq_data *d)
+{
+ __raw_writel(PRIORITY_NONE, ICU_INT_CONF(d->irq));
+}
+
+static void icu_unmask_irq(struct irq_data *d)
+{
+ __raw_writel(IRQ_ROUTE_TO_AP | PRIORITY_DEFAULT, ICU_INT_CONF(d->irq));
+}
+
+static struct irq_chip icu_irq_chip = {
+ .name = "icu_irq",
+ .irq_ack = icu_mask_irq,
+ .irq_mask = icu_mask_irq,
+ .irq_unmask = icu_unmask_irq,
+};
+
+void __init icu_init_irq(void)
+{
+ int irq;
+
+ for (irq = 0; irq < 64; irq++) {
+ icu_mask_irq(irq_get_irq_data(irq));
+ irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq);
+ set_irq_flags(irq, IRQF_VALID);
+ }
+}