[MIPS] JMR3927: Convert to clock_event_device.
This separate the tick timer stuff from the generic MIPS time.c. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
parent
15ad838d28
commit
832348ff0b
|
@ -1,15 +1,4 @@
|
|||
/***********************************************************************
|
||||
*
|
||||
* Copyright 2001 MontaVista Software Inc.
|
||||
* Author: MontaVista Software, Inc.
|
||||
* ahennessy@mvista.com
|
||||
*
|
||||
* Based on arch/mips/ddb5xxx/ddb5477/setup.c
|
||||
*
|
||||
* Setup file for JMR3927.
|
||||
*
|
||||
* Copyright (C) 2000-2001 Toshiba Corporation
|
||||
*
|
||||
/*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
|
@ -30,9 +19,15 @@
|
|||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*
|
||||
***********************************************************************
|
||||
* Copyright 2001 MontaVista Software Inc.
|
||||
* Author: MontaVista Software, Inc.
|
||||
* ahennessy@mvista.com
|
||||
*
|
||||
* Copyright (C) 2000-2001 Toshiba Corporation
|
||||
* Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
|
||||
*/
|
||||
|
||||
#include <linux/clockchips.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/kdev_t.h>
|
||||
|
@ -104,27 +99,60 @@ static cycle_t jmr3927_hpt_read(void)
|
|||
return jiffies * (JMR3927_TIMER_CLK / HZ) + jmr3927_tmrptr->trr;
|
||||
}
|
||||
|
||||
static void jmr3927_timer_ack(void)
|
||||
static void jmr3927_set_mode(enum clock_event_mode mode,
|
||||
struct clock_event_device *evt)
|
||||
{
|
||||
jmr3927_tmrptr->tisr = 0; /* ack interrupt */
|
||||
/* Nothing to do here */
|
||||
}
|
||||
|
||||
struct clock_event_device jmr3927_clock_event_device = {
|
||||
.name = "MIPS",
|
||||
.features = CLOCK_EVT_FEAT_PERIODIC,
|
||||
.shift = 32,
|
||||
.rating = 300,
|
||||
.cpumask = CPU_MASK_CPU0,
|
||||
.irq = JMR3927_IRQ_TICK,
|
||||
.set_mode = jmr3927_set_mode,
|
||||
};
|
||||
|
||||
static irqreturn_t jmr3927_timer_interrupt(int irq, void *dev_id)
|
||||
{
|
||||
struct clock_event_device *cd = &jmr3927_clock_event_device;
|
||||
|
||||
jmr3927_tmrptr->tisr = 0; /* ack interrupt */
|
||||
|
||||
cd->event_handler(cd);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static struct irqaction jmr3927_timer_irqaction = {
|
||||
.handler = jmr3927_timer_interrupt,
|
||||
.flags = IRQF_DISABLED | IRQF_PERCPU,
|
||||
.name = "jmr3927-timer",
|
||||
};
|
||||
|
||||
void __init plat_time_init(void)
|
||||
{
|
||||
clocksource_mips.read = jmr3927_hpt_read;
|
||||
mips_timer_ack = jmr3927_timer_ack;
|
||||
mips_hpt_frequency = JMR3927_TIMER_CLK;
|
||||
}
|
||||
struct clock_event_device *cd;
|
||||
|
||||
clocksource_mips.read = jmr3927_hpt_read;
|
||||
mips_hpt_frequency = JMR3927_TIMER_CLK;
|
||||
|
||||
void __init plat_timer_setup(struct irqaction *irq)
|
||||
{
|
||||
jmr3927_tmrptr->cpra = JMR3927_TIMER_CLK / HZ;
|
||||
jmr3927_tmrptr->itmr = TXx927_TMTITMR_TIIE | TXx927_TMTITMR_TZCE;
|
||||
jmr3927_tmrptr->ccdr = JMR3927_TIMER_CCD;
|
||||
jmr3927_tmrptr->tcr =
|
||||
TXx927_TMTCR_TCE | TXx927_TMTCR_CCDE | TXx927_TMTCR_TMODE_ITVL;
|
||||
|
||||
setup_irq(JMR3927_IRQ_TICK, irq);
|
||||
cd = &jmr3927_clock_event_device;
|
||||
/* Calculate the min / max delta */
|
||||
cd->mult = div_sc((unsigned long) JMR3927_IMCLK, NSEC_PER_SEC, 32);
|
||||
cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd);
|
||||
cd->min_delta_ns = clockevent_delta2ns(0x300, cd);
|
||||
clockevents_register_device(cd);
|
||||
|
||||
setup_irq(JMR3927_IRQ_TICK, &jmr3927_timer_irqaction);
|
||||
}
|
||||
|
||||
#define DO_WRITE_THROUGH
|
||||
|
|
Loading…
Reference in a new issue