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8c24594d PM |
1 | /* |
2 | * Dummy local timer | |
3 | * | |
4 | * Copyright (C) 2008 Paul Mundt | |
5 | * | |
6 | * cloned from: | |
7 | * | |
8 | * linux/arch/arm/mach-realview/localtimer.c | |
9 | * | |
10 | * Copyright (C) 2002 ARM Ltd. | |
11 | * All Rights Reserved | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | */ | |
17 | #include <linux/init.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/device.h> | |
21 | #include <linux/smp.h> | |
22 | #include <linux/jiffies.h> | |
23 | #include <linux/percpu.h> | |
24 | #include <linux/clockchips.h> | |
fc6191dd | 25 | #include <linux/hardirq.h> |
8c24594d PM |
26 | #include <linux/irq.h> |
27 | ||
28 | static DEFINE_PER_CPU(struct clock_event_device, local_clockevent); | |
29 | ||
30 | /* | |
31 | * Used on SMP for either the local timer or SMP_MSG_TIMER | |
32 | */ | |
33 | void local_timer_interrupt(void) | |
34 | { | |
35 | struct clock_event_device *clk = &__get_cpu_var(local_clockevent); | |
36 | ||
fc6191dd | 37 | irq_enter(); |
8c24594d | 38 | clk->event_handler(clk); |
fc6191dd | 39 | irq_exit(); |
8c24594d PM |
40 | } |
41 | ||
42 | static void dummy_timer_set_mode(enum clock_event_mode mode, | |
43 | struct clock_event_device *clk) | |
44 | { | |
45 | } | |
46 | ||
47 | void __cpuinit local_timer_setup(unsigned int cpu) | |
48 | { | |
49 | struct clock_event_device *clk = &per_cpu(local_clockevent, cpu); | |
50 | ||
51 | clk->name = "dummy_timer"; | |
fc6191dd PM |
52 | clk->features = CLOCK_EVT_FEAT_ONESHOT | |
53 | CLOCK_EVT_FEAT_PERIODIC | | |
54 | CLOCK_EVT_FEAT_DUMMY; | |
55 | clk->rating = 400; | |
8c24594d PM |
56 | clk->mult = 1; |
57 | clk->set_mode = dummy_timer_set_mode; | |
58 | clk->broadcast = smp_timer_broadcast; | |
320ab2b0 | 59 | clk->cpumask = cpumask_of(cpu); |
8c24594d PM |
60 | |
61 | clockevents_register_device(clk); | |
62 | } |