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/*
* linux/arch/arm/mach-h720x/cpu-h7201.c
*
* Copyright (C) 2003 Thomas Gleixner <tglx@linutronix.de>
* 2003 Robert Schwebel <r.schwebel@pengutronix.de>
* 2004 Sascha Hauer <s.hauer@pengutronix.de>
*
* processor specific stuff for the Hynix h7201
*
* 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/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <asm/types.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/arch/irqs.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
#include "common.h"
/*
* Timer interrupt handler
*/
static irqreturn_t
h7201_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
write_seqlock(&xtime_lock);
CPU_REG (TIMER_VIRT, TIMER_TOPSTAT);
timer_tick(regs);
write_sequnlock(&xtime_lock);
return IRQ_HANDLED;
}
static struct irqaction h7201_timer_irq = {
.name = "h7201 Timer Tick",
.flags = IRQF_DISABLED | IRQF_TIMER,
.handler = h7201_timer_interrupt,
};
/*
* Setup TIMER0 as system timer
*/
void __init h7201_init_time(void)
{
CPU_REG (TIMER_VIRT, TM0_PERIOD) = LATCH;
CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_RESET;
CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_REPEAT | TM_START;
CPU_REG (TIMER_VIRT, TIMER_TOPCTRL) = ENABLE_TM0_INTR | TIMER_ENABLE_BIT;
setup_irq(IRQ_TIMER0, &h7201_timer_irq);
}
struct sys_timer h7201_timer = {
.init = h7201_init_time,
.offset = h720x_gettimeoffset,
};
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