[deliverable/linux.git] / arch / mips / kernel / csrc-r4k.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) 2007 by Ralf Baechle
 */
#include <linux/clocksource.h>
#include <linux/init.h>

#include <asm/time.h>

static cycle_t c0_hpt_read(struct clocksource *cs)
{
	return read_c0_count();
}

static struct clocksource clocksource_mips = {
	.name		= "MIPS",
	.read		= c0_hpt_read,
	.mask		= CLOCKSOURCE_MASK(32),
	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
};

int __init init_r4k_clocksource(void)
{
	if (!cpu_has_counter || !mips_hpt_frequency)
		return -ENXIO;

	/* Calculate a somewhat reasonable rating value */
	clocksource_mips.rating = 200 + mips_hpt_frequency / 10000000;

	clocksource_register_hz(&clocksource_mips, mips_hpt_frequency);

	return 0;
}
Commit	Line	Data
940f6b48 RB	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) 2007 by Ralf Baechle
	7	*/
e6a1bb72 RB	8	#include <linux/clocksource.h>
	9	#include <linux/init.h>
	10
	11	#include <asm/time.h>
940f6b48	12
8e19608e	13	static cycle_t c0_hpt_read(struct clocksource *cs)
940f6b48 RB	14	{
	15	return read_c0_count();
	16	}
	17
	18	static struct clocksource clocksource_mips = {
	19	.name = "MIPS",
	20	.read = c0_hpt_read,
	21	.mask = CLOCKSOURCE_MASK(32),
	22	.flags = CLOCK_SOURCE_IS_CONTINUOUS,
	23	};
	24
779e7d41	25	int __init init_r4k_clocksource(void)
940f6b48	26	{
69e634f1 RB	27	if (!cpu_has_counter \|\| !mips_hpt_frequency)
	28	return -ENXIO;
	29
664c4bbb	30	/* Calculate a somewhat reasonable rating value */
940f6b48 RB	31	clocksource_mips.rating = 200 + mips_hpt_frequency / 10000000;
940f6b48 RB	32
75c4fd8c	33	clocksource_register_hz(&clocksource_mips, mips_hpt_frequency);
69e634f1 RB	34
69e634f1 RB	35	return 0;
940f6b48	36	}