2 * arch/arm/mach-lh7a40x/time.c
4 * Copyright (C) 2004 Logic Product Development
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/interrupt.h>
14 #include <linux/time.h>
16 #include <asm/hardware.h>
21 #include <asm/mach/time.h>
25 # define TIMER_CONTROL TIMER_CONTROL2
26 # define TIMER_LOAD TIMER_LOAD2
27 # define TIMER_CONSTANT (508469/HZ)
28 # define TIMER_MODE (TIMER_C_ENABLE | TIMER_C_PERIODIC | TIMER_C_508KHZ)
29 # define TIMER_EOI TIMER_EOI2
30 # define TIMER_IRQ IRQ_T2UI
32 # define TIMER_CONTROL TIMER_CONTROL3
33 # define TIMER_LOAD TIMER_LOAD3
34 # define TIMER_CONSTANT (3686400/HZ)
35 # define TIMER_MODE (TIMER_C_ENABLE | TIMER_C_PERIODIC)
36 # define TIMER_EOI TIMER_EOI3
37 # define TIMER_IRQ IRQ_T3UI
41 lh7a40x_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
43 write_seqlock(&xtime_lock);
48 write_sequnlock(&xtime_lock);
53 static struct irqaction lh7a40x_timer_irq = {
54 .name = "LHA740x Timer Tick",
55 .flags = SA_INTERRUPT | SA_TIMER,
56 .handler = lh7a40x_timer_interrupt,
59 static void __init lh7a40x_timer_init (void)
61 /* Stop/disable all timers */
66 setup_irq (TIMER_IRQ, &lh7a40x_timer_irq);
68 TIMER_LOAD = TIMER_CONSTANT;
69 TIMER_CONTROL = TIMER_MODE;
72 struct sys_timer lh7a40x_timer = {
73 .init = &lh7a40x_timer_init,