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>
25#include <linux/hardirq.h>
26#include <linux/irq.h>
27
28static 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 */
33void local_timer_interrupt(void)
34{
35	struct clock_event_device *clk = this_cpu_ptr(&local_clockevent);
36
37	irq_enter();
38	clk->event_handler(clk);
39	irq_exit();
40}
41
42static void dummy_timer_set_mode(enum clock_event_mode mode,
43				 struct clock_event_device *clk)
44{
45}
46
47void local_timer_setup(unsigned int cpu)
48{
49	struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
50
51	clk->name		= "dummy_timer";
52	clk->features		= CLOCK_EVT_FEAT_ONESHOT |
53				  CLOCK_EVT_FEAT_PERIODIC |
54				  CLOCK_EVT_FEAT_DUMMY;
55	clk->rating		= 400;
56	clk->mult		= 1;
57	clk->set_mode		= dummy_timer_set_mode;
58	clk->broadcast		= smp_timer_broadcast;
59	clk->cpumask		= cpumask_of(cpu);
60
61	clockevents_register_device(clk);
62}
63
64void local_timer_stop(unsigned int cpu)
65{
66}
67