/* * 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); } }