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Commit 832348ff authored by Ralf Baechle's avatar Ralf Baechle
Browse files

[MIPS] JMR3927: Convert to clock_event_device. 



This separate the tick timer stuff from the generic MIPS time.c.

Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 15ad838d

arch/mips/jmr3927/rbhma3100/setup.c

+47 −19
Original line number Diff line number Diff line 
/***********************************************************************

 *

 * 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)

{

	/* 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)

{

	struct clock_event_device *cd;



	clocksource_mips.read = jmr3927_hpt_read;

	mips_timer_ack = jmr3927_timer_ack;

	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