diff options
Diffstat (limited to 'arch/mips/kernel/i8253.c')
| -rw-r--r-- | arch/mips/kernel/i8253.c | 47 |
1 files changed, 29 insertions, 18 deletions
diff --git a/arch/mips/kernel/i8253.c b/arch/mips/kernel/i8253.c index 475df690421..c5bc344fc74 100644 --- a/arch/mips/kernel/i8253.c +++ b/arch/mips/kernel/i8253.c @@ -1,28 +1,39 @@ /* - * Copyright (C) 2006 IBM Corporation + * i8253.c 8253/PIT functions * - * Implements device information for i8253 timer chip - * - * 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/clockchips.h> +#include <linux/i8253.h> +#include <linux/export.h> +#include <linux/smp.h> +#include <linux/irq.h> -#include <linux/platform_device.h> +#include <asm/time.h> -static __init int add_pcspkr(void) +static irqreturn_t timer_interrupt(int irq, void *dev_id) { - struct platform_device *pd; - int ret; + i8253_clockevent.event_handler(&i8253_clockevent); + + return IRQ_HANDLED; +} - pd = platform_device_alloc("pcspkr", -1); - if (!pd) - return -ENOMEM; +static struct irqaction irq0 = { + .handler = timer_interrupt, + .flags = IRQF_NOBALANCING | IRQF_TIMER, + .name = "timer" +}; - ret = platform_device_add(pd); - if (ret) - platform_device_put(pd); +void __init setup_pit_timer(void) +{ + clockevent_i8253_init(true); + setup_irq(0, &irq0); +} + +static int __init init_pit_clocksource(void) +{ + if (num_possible_cpus() > 1) /* PIT does not scale! */ + return 0; - return ret; + return clocksource_i8253_init(); } -device_initcall(add_pcspkr); +arch_initcall(init_pit_clocksource); |