platform.c

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/*
 * Copyright (C) 2009 Lemote Inc.
 * Author: Wu Zhangjin, [email protected]
 *
 * 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
 * option) any later version.
 */

#include <linux/err.h>
#include <linux/smp.h>
#include <linux/platform_device.h>

static struct platform_device loongson2_cpufreq_device = {
    .name = "loongson2_cpufreq",
    .id = -1,
};

static int __init loongson2_cpufreq_init(void)
{
    struct cpuinfo_mips *c = &current_cpu_data;

    /* Only 2F revision and it's successors support CPUFreq */
    if ((c->processor_id & PRID_REV_MASK) >= PRID_REV_LOONGSON2F)
        return platform_device_register(&loongson2_cpufreq_device);

    return -ENODEV;
}

arch_initcall(loongson2_cpufreq_init);