psr2.c

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/*
 * Copyright 2008-2011, IBM Corporation
 *
 * 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/delay.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/of.h>
#include <linux/smp.h>
#include <linux/time.h>

#include <asm/machdep.h>
#include <asm/udbg.h>

#include "ics.h"
#include "wsp.h"


static void psr2_spin(void)
{
    hard_irq_disable();
    for (;;)
        continue;
}

static void psr2_restart(char *cmd)
{
    psr2_spin();
}

static int __init psr2_probe(void)
{
    unsigned long root = of_get_flat_dt_root();

    if (of_flat_dt_is_compatible(root, "ibm,wsp-chroma")) {
        /* chroma systems also claim they are psr2s */
        return 0;
    }

    if (!of_flat_dt_is_compatible(root, "ibm,psr2"))
        return 0;

    return 1;
}

define_machine(psr2_md) {
    .name           = "PSR2 A2",
    .probe          = psr2_probe,
    .setup_arch     = wsp_setup_arch,
    .restart        = psr2_restart,
    .power_off      = psr2_spin,
    .halt           = psr2_spin,
    .calibrate_decr     = generic_calibrate_decr,
    .init_IRQ       = wsp_setup_irq,
    .progress       = udbg_progress,
    .power_save     = book3e_idle,
};

machine_arch_initcall(psr2_md, wsp_probe_devices);