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36 lines
855 B
36 lines
855 B
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/arch/arm/mach-footbridge/isa-timer.c |
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* |
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* Copyright (C) 1998 Russell King. |
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* Copyright (C) 1998 Phil Blundell |
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*/ |
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#include <linux/clockchips.h> |
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#include <linux/i8253.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/irq.h> |
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#include <linux/spinlock.h> |
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#include <linux/timex.h> |
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#include <asm/irq.h> |
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#include <asm/mach/time.h> |
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#include "common.h" |
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static irqreturn_t pit_timer_interrupt(int irq, void *dev_id) |
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{ |
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struct clock_event_device *ce = dev_id; |
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ce->event_handler(ce); |
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return IRQ_HANDLED; |
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} |
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void __init isa_timer_init(void) |
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{ |
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clocksource_i8253_init(); |
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if (request_irq(i8253_clockevent.irq, pit_timer_interrupt, |
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IRQF_TIMER | IRQF_IRQPOLL, "pit", &i8253_clockevent)) |
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pr_err("Failed to request irq %d(pit)\n", i8253_clockevent.irq); |
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clockevent_i8253_init(false); |
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}
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