arch/arm/mach-uniphier/cpu-info.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2013-2014 Panasonic Corporation
   4  * Copyright (C) 2015-2017 Socionext Inc.
   5  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   6  */
   7
   8 #include <stdio.h>
   9 #include <linux/errno.h>
  10 #include <linux/io.h>
  11 #include <linux/printk.h>
  12
  13 #include "soc-info.h"
  14
  15 int print_cpuinfo(void)
  16 {
  17         unsigned int id, model, rev, required_model = 1, required_rev = 1;
  18
  19         id = uniphier_get_soc_id();
  20         model = uniphier_get_soc_model();
  21         rev = uniphier_get_soc_revision();
  22
  23         puts("SoC:   ");
  24
  25         switch (id) {
  26         case UNIPHIER_LD4_ID:
  27                 puts("LD4");
  28                 required_rev = 2;
  29                 break;
  30         case UNIPHIER_PRO4_ID:
  31                 puts("Pro4");
  32                 break;
  33         case UNIPHIER_SLD8_ID:
  34                 puts("sLD8");
  35                 break;
  36         case UNIPHIER_PRO5_ID:
  37                 puts("Pro5");
  38                 break;
  39         case UNIPHIER_PXS2_ID:
  40                 puts("PXs2");
  41                 break;
  42         case UNIPHIER_LD6B_ID:
  43                 puts("LD6b");
  44                 break;
  45         case UNIPHIER_LD11_ID:
  46                 puts("LD11");
  47                 break;
  48         case UNIPHIER_LD20_ID:
  49                 puts("LD20");
  50                 break;
  51         case UNIPHIER_PXS3_ID:
  52                 puts("PXs3");
  53                 break;
  54         default:
  55                 printf("Unknown Processor ID (0x%x)\n", id);
  56                 return -ENOTSUPP;
  57         }
  58
  59         printf(" (model %d, revision %d)\n", model, rev);
  60
  61         if (model < required_model) {
  62                 pr_err("Only model %d or newer is supported.\n",
  63                        required_model);
  64                 return -ENOTSUPP;
  65         } else if (rev < required_rev) {
  66                 pr_err("Only revision %d or newer is supported.\n",
  67                        required_rev);
  68                 return -ENOTSUPP;
  69         }
  70
  71         return 0;
  72 }