drivers/cpu/cpu-uclass.c

   1 /*
   2  * Copyright (C) 2015 Google, Inc
   3  * Written by Simon Glass <sjg@chromium.org>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <cpu.h>
  10 #include <dm.h>
  11 #include <dm/lists.h>
  12 #include <dm/root.h>
  13
  14 int cpu_get_desc(struct udevice *dev, char *buf, int size)
  15 {
  16         struct cpu_ops *ops = cpu_get_ops(dev);
  17
  18         if (!ops->get_desc)
  19                 return -ENOSYS;
  20
  21         return ops->get_desc(dev, buf, size);
  22 }
  23
  24 int cpu_get_info(struct udevice *dev, struct cpu_info *info)
  25 {
  26         struct cpu_ops *ops = cpu_get_ops(dev);
  27
  28         if (!ops->get_desc)
  29                 return -ENOSYS;
  30
  31         return ops->get_info(dev, info);
  32 }
  33
  34 U_BOOT_DRIVER(cpu_bus) = {
  35         .name   = "cpu_bus",
  36         .id     = UCLASS_SIMPLE_BUS,
  37         .per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
  38 };
  39
  40 static int uclass_cpu_init(struct uclass *uc)
  41 {
  42         struct udevice *dev;
  43         int node;
  44         int ret;
  45
  46         node = fdt_path_offset(gd->fdt_blob, "/cpus");
  47         if (node < 0)
  48                 return 0;
  49
  50         ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
  51                                          &dev);
  52
  53         return ret;
  54 }
  55
  56 UCLASS_DRIVER(cpu) = {
  57         .id             = UCLASS_CPU,
  58         .name           = "cpu",
  59         .flags          = DM_UC_FLAG_SEQ_ALIAS,
  60         .init           = uclass_cpu_init,
  61 };