/* * 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) { write_seqlock(&xtime_lock); CPU_REG (TIMER_VIRT, TIMER_TOPSTAT); timer_tick(); write_sequnlock(&xtime_lock); return IRQ_HANDLED; } static struct irqaction h7201_timer_irq = { .name = "h7201 Timer Tick", .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, .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, };