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 | |
21 | static 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 | |
28 | void __init isa_timer_init(void) |
29 | { |
30 | clocksource_i8253_init(); |
31 | |
32 | if (request_irq(irq: i8253_clockevent.irq, handler: pit_timer_interrupt, |
33 | IRQF_TIMER | IRQF_IRQPOLL, name: "pit", dev: &i8253_clockevent)) |
34 | pr_err("Failed to request irq %d(pit)\n", i8253_clockevent.irq); |
35 | clockevent_i8253_init(oneshot: false); |
36 | } |
37 |