drivers/cpu/cpu-uclass.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2015 Google, Inc
   4  * Written by Simon Glass <sjg@chromium.org>
   5  */
   6
   7 #include <common.h>
   8 #include <cpu.h>
   9 #include <dm.h>
  10 #include <errno.h>
  11 #include <dm/lists.h>
  12 #include <dm/root.h>
  13
  14 int cpu_probe_all(void)
  15 {
  16         struct udevice *cpu;
  17         int ret;
  18
  19         ret = uclass_first_device(UCLASS_CPU, &cpu);
  20         if (ret) {
  21                 debug("%s: No CPU found (err = %d)\n", __func__, ret);
  22                 return ret;
  23         }
  24
  25         while (cpu) {
  26                 ret = uclass_next_device(&cpu);
  27                 if (ret) {
  28                         debug("%s: Error while probing CPU (err = %d)\n",
  29                               __func__, ret);
  30                         return ret;
  31                 }
  32         }
  33
  34         return 0;
  35 }
  36
  37 int cpu_get_desc(struct udevice *dev, char *buf, int size)
  38 {
  39         struct cpu_ops *ops = cpu_get_ops(dev);
  40
  41         if (!ops->get_desc)
  42                 return -ENOSYS;
  43
  44         return ops->get_desc(dev, buf, size);
  45 }
  46
  47 int cpu_get_info(struct udevice *dev, struct cpu_info *info)
  48 {
  49         struct cpu_ops *ops = cpu_get_ops(dev);
  50
  51         if (!ops->get_info)
  52                 return -ENOSYS;
  53
  54         return ops->get_info(dev, info);
  55 }
  56
  57 int cpu_get_count(struct udevice *dev)
  58 {
  59         struct cpu_ops *ops = cpu_get_ops(dev);
  60
  61         if (!ops->get_count)
  62                 return -ENOSYS;
  63
  64         return ops->get_count(dev);
  65 }
  66
  67 int cpu_get_vendor(struct udevice *dev, char *buf, int size)
  68 {
  69         struct cpu_ops *ops = cpu_get_ops(dev);
  70
  71         if (!ops->get_vendor)
  72                 return -ENOSYS;
  73
  74         return ops->get_vendor(dev, buf, size);
  75 }
  76
  77 U_BOOT_DRIVER(cpu_bus) = {
  78         .name   = "cpu_bus",
  79         .id     = UCLASS_SIMPLE_BUS,
  80         .per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
  81 };
  82
  83 static int uclass_cpu_init(struct uclass *uc)
  84 {
  85         struct udevice *dev;
  86         ofnode node;
  87         int ret;
  88
  89         node = ofnode_path("/cpus");
  90         if (!ofnode_valid(node))
  91                 return 0;
  92
  93         ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
  94                                          &dev);
  95
  96         return ret;
  97 }
  98
  99 UCLASS_DRIVER(cpu) = {
 100         .id             = UCLASS_CPU,
 101         .name           = "cpu",
 102         .flags          = DM_UC_FLAG_SEQ_ALIAS,
 103         .init           = uclass_cpu_init,
 104 };