blob: 51e1c814b40058972ad49b4571a13cf9f8b694a0 (
plain)
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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/*
* arch/arm/mach-lh7a40x/time.c
*
* Copyright (C) 2004 Logic Product Development
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/leds.h>
#include <asm/mach/time.h>
#include "common.h"
#if HZ < 100
# define TIMER_CONTROL TIMER_CONTROL2
# define TIMER_LOAD TIMER_LOAD2
# define TIMER_CONSTANT (508469/HZ)
# define TIMER_MODE (TIMER_C_ENABLE | TIMER_C_PERIODIC | TIMER_C_508KHZ)
# define TIMER_EOI TIMER_EOI2
# define TIMER_IRQ IRQ_T2UI
#else
# define TIMER_CONTROL TIMER_CONTROL3
# define TIMER_LOAD TIMER_LOAD3
# define TIMER_CONSTANT (3686400/HZ)
# define TIMER_MODE (TIMER_C_ENABLE | TIMER_C_PERIODIC)
# define TIMER_EOI TIMER_EOI3
# define TIMER_IRQ IRQ_T3UI
#endif
static irqreturn_t
lh7a40x_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
write_seqlock(&xtime_lock);
TIMER_EOI = 0;
timer_tick(regs);
write_sequnlock(&xtime_lock);
return IRQ_HANDLED;
}
static struct irqaction lh7a40x_timer_irq = {
.name = "LHA740x Timer Tick",
.flags = SA_INTERRUPT,
.handler = lh7a40x_timer_interrupt
};
static void __init lh7a40x_timer_init(void)
{
/* Stop/disable all timers */
TIMER_CONTROL1 = 0;
TIMER_CONTROL2 = 0;
TIMER_CONTROL3 = 0;
setup_irq (TIMER_IRQ, &lh7a40x_timer_irq);
TIMER_LOAD = TIMER_CONSTANT;
TIMER_CONTROL = TIMER_MODE;
}
struct sys_timer lh7a40x_timer = {
.init = &lh7a40x_timer_init,
};
|
