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 <mach/hardware.h> 21#include <asm/irq.h> 22#include <mach/irqs.h> 23#include <asm/mach/irq.h> 24#include <asm/mach/time.h> 25#include "common.h" 26/* 27 * Timer interrupt handler 28 */ 29static irqreturn_t 30h7201_timer_interrupt(int irq, void *dev_id) 31{ 32 CPU_REG (TIMER_VIRT, TIMER_TOPSTAT); 33 timer_tick(); 34 35 return IRQ_HANDLED; 36} 37 38static struct irqaction h7201_timer_irq = { 39 .name = "h7201 Timer Tick", 40 .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, 41 .handler = h7201_timer_interrupt, 42}; 43 44/* 45 * Setup TIMER0 as system timer 46 */ 47void __init h7201_init_time(void) 48{ 49 CPU_REG (TIMER_VIRT, TM0_PERIOD) = LATCH; 50 CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_RESET; 51 CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_REPEAT | TM_START; 52 CPU_REG (TIMER_VIRT, TIMER_TOPCTRL) = ENABLE_TM0_INTR | TIMER_ENABLE_BIT; 53 54 setup_irq(IRQ_TIMER0, &h7201_timer_irq); 55} 56 57struct sys_timer h7201_timer = { 58 .init = h7201_init_time, 59 .offset = h720x_gettimeoffset, 60}; 61