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arm: Footbridge: Use common i8253 clockevent

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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/20110609130622.241312122@linutronix.de
This commit is contained in:
Thomas Gleixner 2011-06-09 13:08:28 +00:00
parent 2d02612f61
commit 8560a6cfc9
2 changed files with 4 additions and 52 deletions
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1
arch/arm/mach-footbridge/Kconfig
View File

@ -5,6 +5,7 @@ menu "Footbridge Implementations"
config ARCH_CATS
bool "CATS"
select CLKSRC_I8253
select CLKEVT_I8253
select FOOTBRIDGE_HOST
select ISA
select ISA_DMA

55
arch/arm/mach-footbridge/isa-timer.c
View File

@ -5,12 +5,10 @@
* Copyright (C) 1998 Phil Blundell
*/
#include <linux/clockchips.h>
#include <linux/clocksource.h>
#include <linux/i8253.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/spinlock.h>
#include <linux/timex.h>
@ -19,48 +17,6 @@
#include "common.h"
static void pit_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
unsigned long flags;
raw_local_irq_save(flags);
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
outb_p(0x34, PIT_MODE);
outb_p(PIT_LATCH & 0xff, PIT_CH0);
outb_p(PIT_LATCH >> 8, PIT_CH0);
break;
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
outb_p(0x30, PIT_MODE);
outb_p(0, PIT_CH0);
outb_p(0, PIT_CH0);
break;
case CLOCK_EVT_MODE_ONESHOT:
case CLOCK_EVT_MODE_RESUME:
break;
}
local_irq_restore(flags);
}
static int pit_set_next_event(unsigned long delta,
struct clock_event_device *evt)
{
return 0;
}
static struct clock_event_device pit_ce = {
.name = "pit",
.features = CLOCK_EVT_FEAT_PERIODIC,
.set_mode = pit_set_mode,
.set_next_event = pit_set_next_event,
.shift = 32,
};
static irqreturn_t pit_timer_interrupt(int irq, void *dev_id)
{
struct clock_event_device *ce = dev_id;
@ -72,20 +28,15 @@ static struct irqaction pit_timer_irq = {
.name = "pit",
.handler = pit_timer_interrupt,
.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
.dev_id = &pit_ce,
.dev_id = &i8253_clockevent,
};
static void __init isa_timer_init(void)
{
pit_ce.cpumask = cpumask_of(smp_processor_id());
pit_ce.mult = div_sc(PIT_TICK_RATE, NSEC_PER_SEC, pit_ce.shift);
pit_ce.max_delta_ns = clockevent_delta2ns(0x7fff, &pit_ce);
pit_ce.min_delta_ns = clockevent_delta2ns(0x000f, &pit_ce);
clocksource_i8253_init();
setup_irq(pit_ce.irq, &pit_timer_irq);
clockevents_register_device(&pit_ce);
setup_irq(i8253_clockevent.irq, &pit_timer_irq);
clockevent_i8253_init(false);
}
struct sys_timer isa_timer = {