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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/arch/arm/mach-footbridge/isa-timer.c | |
4 | * | |
5 | * Copyright (C) 1998 Russell King. | |
6 | * Copyright (C) 1998 Phil Blundell | |
7 | */ | |
4e8d7637 | 8 | #include <linux/clockchips.h> |
334955ef | 9 | #include <linux/i8253.h> |
1da177e4 LT |
10 | #include <linux/init.h> |
11 | #include <linux/interrupt.h> | |
55e86989 | 12 | #include <linux/irq.h> |
8c414ff3 | 13 | #include <linux/spinlock.h> |
4e8d7637 | 14 | #include <linux/timex.h> |
1da177e4 | 15 | |
1da177e4 | 16 | #include <asm/irq.h> |
1da177e4 LT |
17 | #include <asm/mach/time.h> |
18 | ||
19 | #include "common.h" | |
20 | ||
4e8d7637 | 21 | static irqreturn_t pit_timer_interrupt(int irq, void *dev_id) |
1da177e4 | 22 | { |
4e8d7637 RK |
23 | struct clock_event_device *ce = dev_id; |
24 | ce->event_handler(ce); | |
1da177e4 LT |
25 | return IRQ_HANDLED; |
26 | } | |
27 | ||
4e8d7637 RK |
28 | static struct irqaction pit_timer_irq = { |
29 | .name = "pit", | |
30 | .handler = pit_timer_interrupt, | |
26632bec | 31 | .flags = IRQF_TIMER | IRQF_IRQPOLL, |
8560a6cf | 32 | .dev_id = &i8253_clockevent, |
1da177e4 LT |
33 | }; |
34 | ||
6bb27d73 | 35 | void __init isa_timer_init(void) |
1da177e4 | 36 | { |
8c414ff3 | 37 | clocksource_i8253_init(); |
1da177e4 | 38 | |
8560a6cf TG |
39 | setup_irq(i8253_clockevent.irq, &pit_timer_irq); |
40 | clockevent_i8253_init(false); | |
1da177e4 | 41 | } |