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/*
* linux/arch/arm/mach-w90x900/time.c
*
* Based on linux/arch/arm/plat-s3c24xx/time.c by Ben Dooks
*
* Copyright (c) 2008 Nuvoton technology corporation
* All rights reserved.
*
* Wan ZongShun <mcuos.com@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/leds.h>
#include <asm/mach-types.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
#include <mach/system.h>
#include <mach/map.h>
#include <mach/regs-timer.h>
static unsigned long w90x900_gettimeoffset(void)
{
return 0;
}
/*IRQ handler for the timer*/
static irqreturn_t
w90x900_timer_interrupt(int irq, void *dev_id)
{
timer_tick();
__raw_writel(0x01, REG_TISR); /* clear TIF0 */
return IRQ_HANDLED;
}
static struct irqaction w90x900_timer_irq = {
.name = "w90x900 Timer Tick",
.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
.handler = w90x900_timer_interrupt,
};
/*Set up timer reg.*/
static void w90x900_timer_setup(void)
{
__raw_writel(0, REG_TCSR0);
__raw_writel(0, REG_TCSR1);
__raw_writel(0, REG_TCSR2);
__raw_writel(0, REG_TCSR3);
__raw_writel(0, REG_TCSR4);
__raw_writel(0x1F, REG_TISR);
__raw_writel(15000000/(100 * 100), REG_TICR0);
__raw_writel(0x68000063, REG_TCSR0);
}
static void __init w90x900_timer_init(void)
{
w90x900_timer_setup();
setup_irq(IRQ_TIMER0, &w90x900_timer_irq);
}
struct sys_timer w90x900_timer = {
.init = w90x900_timer_init,
.offset = w90x900_gettimeoffset,
.resume = w90x900_timer_setup
};
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