2 * linux/arch/arm/mach-mmp/irq.c
4 * Generic IRQ handling, GPIO IRQ demultiplexing, etc.
6 * Author: Bin Yang <bin.yang@marvell.com>
7 * Created: Sep 30, 2008
8 * Copyright: Marvell International Ltd.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/init.h>
16 #include <linux/irq.h>
19 #include <mach/regs-icu.h>
23 #define IRQ_ROUTE_TO_AP (ICU_INT_CONF_AP_INT | ICU_INT_CONF_IRQ)
25 #define PRIORITY_DEFAULT 0x1
26 #define PRIORITY_NONE 0x0 /* means IRQ disabled */
28 static void icu_mask_irq(unsigned int irq)
30 __raw_writel(PRIORITY_NONE, ICU_INT_CONF(irq));
33 static void icu_unmask_irq(unsigned int irq)
35 __raw_writel(IRQ_ROUTE_TO_AP | PRIORITY_DEFAULT, ICU_INT_CONF(irq));
38 static struct irq_chip icu_irq_chip = {
42 .unmask = icu_unmask_irq,
45 void __init icu_init_irq(void)
49 for (irq = 0; irq < 64; irq++) {
51 set_irq_chip(irq, &icu_irq_chip);
52 set_irq_handler(irq, handle_level_irq);
53 set_irq_flags(irq, IRQF_VALID);