![David Howells](/assets/img/avatar_default.png)
Disintegrate asm/system.h for ARM. Signed-off-by: David Howells <dhowells@redhat.com> cc: Russell King <linux@arm.linux.org.uk> cc: linux-arm-kernel@lists.infradead.org
115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
/*
|
|
* linux/arch/arm/mach-footbridge/dc21285-timer.c
|
|
*
|
|
* Copyright (C) 1998 Russell King.
|
|
* Copyright (C) 1998 Phil Blundell
|
|
*/
|
|
#include <linux/clockchips.h>
|
|
#include <linux/clocksource.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
|
|
#include <asm/irq.h>
|
|
|
|
#include <asm/hardware/dec21285.h>
|
|
#include <asm/mach/time.h>
|
|
#include <asm/system_info.h>
|
|
|
|
#include "common.h"
|
|
|
|
static cycle_t cksrc_dc21285_read(struct clocksource *cs)
|
|
{
|
|
return cs->mask - *CSR_TIMER2_VALUE;
|
|
}
|
|
|
|
static int cksrc_dc21285_enable(struct clocksource *cs)
|
|
{
|
|
*CSR_TIMER2_LOAD = cs->mask;
|
|
*CSR_TIMER2_CLR = 0;
|
|
*CSR_TIMER2_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_DIV16;
|
|
return 0;
|
|
}
|
|
|
|
static void cksrc_dc21285_disable(struct clocksource *cs)
|
|
{
|
|
*CSR_TIMER2_CNTL = 0;
|
|
}
|
|
|
|
static struct clocksource cksrc_dc21285 = {
|
|
.name = "dc21285_timer2",
|
|
.rating = 200,
|
|
.read = cksrc_dc21285_read,
|
|
.enable = cksrc_dc21285_enable,
|
|
.disable = cksrc_dc21285_disable,
|
|
.mask = CLOCKSOURCE_MASK(24),
|
|
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
|
|
};
|
|
|
|
static void ckevt_dc21285_set_mode(enum clock_event_mode mode,
|
|
struct clock_event_device *c)
|
|
{
|
|
switch (mode) {
|
|
case CLOCK_EVT_MODE_RESUME:
|
|
case CLOCK_EVT_MODE_PERIODIC:
|
|
*CSR_TIMER1_CLR = 0;
|
|
*CSR_TIMER1_LOAD = (mem_fclk_21285 + 8 * HZ) / (16 * HZ);
|
|
*CSR_TIMER1_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_AUTORELOAD |
|
|
TIMER_CNTL_DIV16;
|
|
break;
|
|
|
|
default:
|
|
*CSR_TIMER1_CNTL = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static struct clock_event_device ckevt_dc21285 = {
|
|
.name = "dc21285_timer1",
|
|
.features = CLOCK_EVT_FEAT_PERIODIC,
|
|
.rating = 200,
|
|
.irq = IRQ_TIMER1,
|
|
.set_mode = ckevt_dc21285_set_mode,
|
|
};
|
|
|
|
static irqreturn_t timer1_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct clock_event_device *ce = dev_id;
|
|
|
|
*CSR_TIMER1_CLR = 0;
|
|
|
|
ce->event_handler(ce);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static struct irqaction footbridge_timer_irq = {
|
|
.name = "dc21285_timer1",
|
|
.handler = timer1_interrupt,
|
|
.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
|
|
.dev_id = &ckevt_dc21285,
|
|
};
|
|
|
|
/*
|
|
* Set up timer interrupt.
|
|
*/
|
|
static void __init footbridge_timer_init(void)
|
|
{
|
|
struct clock_event_device *ce = &ckevt_dc21285;
|
|
|
|
clocksource_register_hz(&cksrc_dc21285, (mem_fclk_21285 + 8) / 16);
|
|
|
|
setup_irq(ce->irq, &footbridge_timer_irq);
|
|
|
|
clockevents_calc_mult_shift(ce, mem_fclk_21285, 5);
|
|
ce->max_delta_ns = clockevent_delta2ns(0xffffff, ce);
|
|
ce->min_delta_ns = clockevent_delta2ns(0x000004, ce);
|
|
ce->cpumask = cpumask_of(smp_processor_id());
|
|
|
|
clockevents_register_device(ce);
|
|
}
|
|
|
|
struct sys_timer footbridge_timer = {
|
|
.init = footbridge_timer_init,
|
|
};
|