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