linux/arch/powerpc/platforms/wsp/psr2.c
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   1/*
   2 * Copyright 2008-2011, IBM Corporation
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of the GNU General Public License
   6 * as published by the Free Software Foundation; either version
   7 * 2 of the License, or (at your option) any later version.
   8 */
   9
  10#include <linux/delay.h>
  11#include <linux/init.h>
  12#include <linux/irq.h>
  13#include <linux/kernel.h>
  14#include <linux/mm.h>
  15#include <linux/of.h>
  16#include <linux/smp.h>
  17#include <linux/time.h>
  18
  19#include <asm/machdep.h>
  20#include <asm/system.h>
  21#include <asm/udbg.h>
  22
  23#include "ics.h"
  24#include "wsp.h"
  25
  26
  27static void psr2_spin(void)
  28{
  29        hard_irq_disable();
  30        for (;;)
  31                continue;
  32}
  33
  34static void psr2_restart(char *cmd)
  35{
  36        psr2_spin();
  37}
  38
  39static int __init psr2_probe(void)
  40{
  41        unsigned long root = of_get_flat_dt_root();
  42
  43        if (of_flat_dt_is_compatible(root, "ibm,wsp-chroma")) {
  44                /* chroma systems also claim they are psr2s */
  45                return 0;
  46        }
  47
  48        if (!of_flat_dt_is_compatible(root, "ibm,psr2"))
  49                return 0;
  50
  51        return 1;
  52}
  53
  54define_machine(psr2_md) {
  55        .name                   = "PSR2 A2",
  56        .probe                  = psr2_probe,
  57        .setup_arch             = wsp_setup_arch,
  58        .restart                = psr2_restart,
  59        .power_off              = psr2_spin,
  60        .halt                   = psr2_spin,
  61        .calibrate_decr         = generic_calibrate_decr,
  62        .init_IRQ               = wsp_setup_irq,
  63        .progress               = udbg_progress,
  64        .power_save             = book3e_idle,
  65};
  66
  67machine_arch_initcall(psr2_md, wsp_probe_devices);
  68