aboutsummaryrefslogblamecommitdiffstats
path: root/arch/mips/kernel/csrc-r4k.c
blob: e95a3cd48eeacac0c03f22b8e8ac2fcf2e3a7f52 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11






                                                                             



                              
 
                                                  










                                                     
                                     
 


                                                    
                                                          




                                                                      

                 
 
/*
 * 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_set_clock(&clocksource_mips, mips_hpt_frequency);

	clocksource_register(&clocksource_mips);

	return 0;
}