/* * linux/arch/arm/mach-footbridge/isa-timer.c * * Copyright (C) 1998 Russell King. * Copyright (C) 1998 Phil Blundell */ #include <linux/clockchips.h> #include <linux/i8253.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/spinlock.h> #include <linux/timex.h> #include <asm/irq.h> #include <asm/mach/time.h> #include "common.h" static irqreturn_t pit_timer_interrupt(int irq, void *dev_id) { struct clock_event_device *ce = dev_id; ce->event_handler(ce); return IRQ_HANDLED; } static struct irqaction pit_timer_irq = { .name = "pit", .handler = pit_timer_interrupt, .flags = IRQF_TIMER | IRQF_IRQPOLL, .dev_id = &i8253_clockevent, }; void __init isa_timer_init(void) { clocksource_i8253_init(); setup_irq(i8253_clockevent.irq, &pit_timer_irq); clockevent_i8253_init(false); }