1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
// SPDX-License-Identifier: GPL-2.0
/*
* 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;
}
void __init isa_timer_init(void)
{
clocksource_i8253_init();
if (request_irq(i8253_clockevent.irq, pit_timer_interrupt,
IRQF_TIMER | IRQF_IRQPOLL, "pit", &i8253_clockevent))
pr_err("Failed to request irq %d(pit)\n", i8253_clockevent.irq);
clockevent_i8253_init(false);
}
|
