[deliverable/linux.git] / drivers / clocksource / mips-gic-timer.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2012 MIPS Technologies, Inc.  All rights reserved.
 */
#include <linux/init.h>
#include <linux/irqchip/mips-gic.h>
#include <linux/time.h>

static cycle_t gic_hpt_read(struct clocksource *cs)
{
	return gic_read_count();
}

static struct clocksource gic_clocksource = {
	.name	= "GIC",
	.read	= gic_hpt_read,
	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
};

void __init gic_clocksource_init(unsigned int frequency)
{
	/* Set clocksource mask. */
	gic_clocksource.mask = CLOCKSOURCE_MASK(gic_get_count_width());

	/* Calculate a somewhat reasonable rating value. */
	gic_clocksource.rating = 200 + frequency / 10000000;

	clocksource_register_hz(&gic_clocksource, frequency);
}
Commit	Line	Data
778eeb1b SH	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
	7	*/
778eeb1b	8	#include <linux/init.h>
4060bbe9	9	#include <linux/irqchip/mips-gic.h>
dfa762e1	10	#include <linux/time.h>
778eeb1b	11
778eeb1b SH	12	static cycle_t gic_hpt_read(struct clocksource *cs)
778eeb1b SH	13	{
dfa762e1	14	return gic_read_count();
778eeb1b SH	15	}
	16
	17	static struct clocksource gic_clocksource = {
	18	.name = "GIC",
	19	.read = gic_hpt_read,
	20	.flags = CLOCK_SOURCE_IS_CONTINUOUS,
	21	};
	22
	23	void __init gic_clocksource_init(unsigned int frequency)
	24	{
778eeb1b	25	/* Set clocksource mask. */
387904ff	26	gic_clocksource.mask = CLOCKSOURCE_MASK(gic_get_count_width());
778eeb1b SH	27
	28	/* Calculate a somewhat reasonable rating value. */
	29	gic_clocksource.rating = 200 + frequency / 10000000;
	30
	31	clocksource_register_hz(&gic_clocksource, frequency);
	32	}