arch/mips/loongson2ef/common/platform.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2009 Lemote Inc.
   4  * Author: Wu Zhangjin, wuzhangjin@gmail.com
   5  */
   6
   7 #include <linux/err.h>
   8 #include <linux/smp.h>
   9 #include <linux/platform_device.h>
  10
  11 static struct platform_device loongson2_cpufreq_device = {
  12         .name = "loongson2_cpufreq",
  13         .id = -1,
  14 };
  15
  16 static int __init loongson2_cpufreq_init(void)
  17 {
  18         struct cpuinfo_mips *c = &current_cpu_data;
  19
  20         /* Only 2F revision and its successors support CPUFreq */
  21         if ((c->processor_id & PRID_REV_MASK) >= PRID_REV_LOONGSON2F)
  22                 return platform_device_register(&loongson2_cpufreq_device);
  23
  24         return -ENODEV;
  25 }
  26
  27 arch_initcall(loongson2_cpufreq_init);