csrc-r4k.c

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/*
 * 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;
}