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Viewing changes to arch/arm/mach-mmp/irq.c

  • Committer: Bazaar Package Importer
  • Author(s): Luke Yelavich
  • Date: 2009-08-05 23:00:52 UTC
  • Revision ID: james.westby@ubuntu.com-20090805230052-7xedvqcyk9dnnxb2
Tags: 2.6.31-1.1
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arch/arm/mach-mmp/irq.c
 
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/*
 
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 *  linux/arch/arm/mach-mmp/irq.c
 
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 *
 
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 *  Generic IRQ handling, GPIO IRQ demultiplexing, etc.
 
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 *
 
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 *  Author:     Bin Yang <bin.yang@marvell.com>
 
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 *  Created:    Sep 30, 2008
 
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 *  Copyright:  Marvell International Ltd.
 
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 *
 
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 *  This program is free software; you can redistribute it and/or modify
 
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 *  it under the terms of the GNU General Public License version 2 as
 
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 *  published by the Free Software Foundation.
 
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 */
 
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#include <linux/init.h>
 
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#include <linux/irq.h>
 
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#include <linux/io.h>
 
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#include <mach/regs-icu.h>
 
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#include "common.h"
 
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#define IRQ_ROUTE_TO_AP         (ICU_INT_CONF_AP_INT | ICU_INT_CONF_IRQ)
 
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#define PRIORITY_DEFAULT        0x1
 
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#define PRIORITY_NONE           0x0     /* means IRQ disabled */
 
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static void icu_mask_irq(unsigned int irq)
 
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{
 
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        __raw_writel(PRIORITY_NONE, ICU_INT_CONF(irq));
 
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}
 
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static void icu_unmask_irq(unsigned int irq)
 
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{
 
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        __raw_writel(IRQ_ROUTE_TO_AP | PRIORITY_DEFAULT, ICU_INT_CONF(irq));
 
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}
 
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static struct irq_chip icu_irq_chip = {
 
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        .name   = "icu_irq",
 
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        .ack    = icu_mask_irq,
 
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        .mask   = icu_mask_irq,
 
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        .unmask = icu_unmask_irq,
 
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};
 
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void __init icu_init_irq(void)
 
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{
 
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        int irq;
 
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        for (irq = 0; irq < 64; irq++) {
 
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                icu_mask_irq(irq);
 
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                set_irq_chip(irq, &icu_irq_chip);
 
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                set_irq_handler(irq, handle_level_irq);
 
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                set_irq_flags(irq, IRQF_VALID);
 
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        }
 
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}