55 строки
1.2 KiB
C
55 строки
1.2 KiB
C
/*
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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(struct irq_data *d)
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{
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__raw_writel(PRIORITY_NONE, ICU_INT_CONF(d->irq));
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}
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static void icu_unmask_irq(struct irq_data *d)
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{
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__raw_writel(IRQ_ROUTE_TO_AP | PRIORITY_DEFAULT, ICU_INT_CONF(d->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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.irq_ack = icu_mask_irq,
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.irq_mask = icu_mask_irq,
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.irq_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_get_irq_data(irq));
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irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq);
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set_irq_flags(irq, IRQF_VALID);
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}
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}
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