1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 *  linux/arch/arm/mach-footbridge/isa-timer.c
 4 *
 5 *  Copyright (C) 1998 Russell King.
 6 *  Copyright (C) 1998 Phil Blundell
 7 */
 8#include <linux/clockchips.h>
 9#include <linux/i8253.h>
10#include <linux/init.h>
11#include <linux/interrupt.h>
12#include <linux/irq.h>
13#include <linux/spinlock.h>
14#include <linux/timex.h>
15
16#include <asm/irq.h>
17#include <asm/mach/time.h>
18
19#include "common.h"
20
21static irqreturn_t pit_timer_interrupt(int irq, void *dev_id)
22{
23	struct clock_event_device *ce = dev_id;
24	ce->event_handler(ce);
25	return IRQ_HANDLED;
26}
27
 
 
 
 
 
 
 
28void __init isa_timer_init(void)
29{
30	clocksource_i8253_init();
31
32	if (request_irq(i8253_clockevent.irq, pit_timer_interrupt,
33			IRQF_TIMER | IRQF_IRQPOLL, "pit", &i8253_clockevent))
34		pr_err("Failed to request irq %d(pit)\n", i8253_clockevent.irq);
35	clockevent_i8253_init(false);
36}

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 *  linux/arch/arm/mach-footbridge/isa-timer.c
 4 *
 5 *  Copyright (C) 1998 Russell King.
 6 *  Copyright (C) 1998 Phil Blundell
 7 */
 8#include <linux/clockchips.h>
 9#include <linux/i8253.h>
10#include <linux/init.h>
11#include <linux/interrupt.h>
12#include <linux/irq.h>
13#include <linux/spinlock.h>
14#include <linux/timex.h>
15
16#include <asm/irq.h>
17#include <asm/mach/time.h>
18
19#include "common.h"
20
21static irqreturn_t pit_timer_interrupt(int irq, void *dev_id)
22{
23	struct clock_event_device *ce = dev_id;
24	ce->event_handler(ce);
25	return IRQ_HANDLED;
26}
27
28static struct irqaction pit_timer_irq = {
29	.name		= "pit",
30	.handler	= pit_timer_interrupt,
31	.flags		= IRQF_TIMER | IRQF_IRQPOLL,
32	.dev_id		= &i8253_clockevent,
33};
34
35void __init isa_timer_init(void)
36{
37	clocksource_i8253_init();
38
39	setup_irq(i8253_clockevent.irq, &pit_timer_irq);
 
 
40	clockevent_i8253_init(false);
41}