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 <errno.h>
  12 #include <dm/lists.h>
  13 #include <dm/root.h>
  14
  15 int cpu_get_desc(struct udevice *dev, char *buf, int size)
  16 {
  17         struct cpu_ops *ops = cpu_get_ops(dev);
  18
  19         if (!ops->get_desc)
  20                 return -ENOSYS;
  21
  22         return ops->get_desc(dev, buf, size);
  23 }
  24
  25 int cpu_get_info(struct udevice *dev, struct cpu_info *info)
  26 {
  27         struct cpu_ops *ops = cpu_get_ops(dev);
  28
  29         if (!ops->get_desc)
  30                 return -ENOSYS;
  31
  32         return ops->get_info(dev, info);
  33 }
  34
  35 U_BOOT_DRIVER(cpu_bus) = {
  36         .name   = "cpu_bus",
  37         .id     = UCLASS_SIMPLE_BUS,
  38         .per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
  39 };
  40
  41 static int uclass_cpu_init(struct uclass *uc)
  42 {
  43         struct udevice *dev;
  44         int node;
  45         int ret;
  46
  47         node = fdt_path_offset(gd->fdt_blob, "/cpus");
  48         if (node < 0)
  49                 return 0;
  50
  51         ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
  52                                          &dev);
  53
  54         return ret;
  55 }
  56
  57 UCLASS_DRIVER(cpu) = {
  58         .id             = UCLASS_CPU,
  59         .name           = "cpu",
  60         .flags          = DM_UC_FLAG_SEQ_ALIAS,
  61         .init           = uclass_cpu_init,
  62 };