Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy...
[linux-2.6] / arch / arm / mach-h720x / cpu-h7201.c
1 /*
2  * linux/arch/arm/mach-h720x/cpu-h7201.c
3  *
4  * Copyright (C) 2003 Thomas Gleixner <tglx@linutronix.de>
5  *               2003 Robert Schwebel <r.schwebel@pengutronix.de>
6  *               2004 Sascha Hauer    <s.hauer@pengutronix.de>
7  *
8  * processor specific stuff for the Hynix h7201
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13  *
14  */
15
16 #include <linux/init.h>
17 #include <linux/interrupt.h>
18 #include <linux/module.h>
19 #include <asm/types.h>
20 #include <asm/hardware.h>
21 #include <asm/irq.h>
22 #include <asm/arch/irqs.h>
23 #include <asm/mach/irq.h>
24 #include <asm/mach/time.h>
25 #include "common.h"
26 /*
27  * Timer interrupt handler
28  */
29 static irqreturn_t
30 h7201_timer_interrupt(int irq, void *dev_id)
31 {
32         write_seqlock(&xtime_lock);
33
34         CPU_REG (TIMER_VIRT, TIMER_TOPSTAT);
35         timer_tick();
36
37         write_sequnlock(&xtime_lock);
38
39         return IRQ_HANDLED;
40 }
41
42 static struct irqaction h7201_timer_irq = {
43         .name           = "h7201 Timer Tick",
44         .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
45         .handler        = h7201_timer_interrupt,
46 };
47
48 /*
49  * Setup TIMER0 as system timer
50  */
51 void __init h7201_init_time(void)
52 {
53         CPU_REG (TIMER_VIRT, TM0_PERIOD) = LATCH;
54         CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_RESET;
55         CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_REPEAT | TM_START;
56         CPU_REG (TIMER_VIRT, TIMER_TOPCTRL) = ENABLE_TM0_INTR | TIMER_ENABLE_BIT;
57
58         setup_irq(IRQ_TIMER0, &h7201_timer_irq);
59 }
60
61 struct sys_timer h7201_timer = {
62         .init           = h7201_init_time,
63         .offset         = h720x_gettimeoffset,
64 };