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[u-boot] / 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 DECLARE_GLOBAL_DATA_PTR;
16
17 int cpu_get_desc(struct udevice *dev, char *buf, int size)
18 {
19         struct cpu_ops *ops = cpu_get_ops(dev);
20
21         if (!ops->get_desc)
22                 return -ENOSYS;
23
24         return ops->get_desc(dev, buf, size);
25 }
26
27 int cpu_get_info(struct udevice *dev, struct cpu_info *info)
28 {
29         struct cpu_ops *ops = cpu_get_ops(dev);
30
31         if (!ops->get_info)
32                 return -ENOSYS;
33
34         return ops->get_info(dev, info);
35 }
36
37 int cpu_get_count(struct udevice *dev)
38 {
39         struct cpu_ops *ops = cpu_get_ops(dev);
40
41         if (!ops->get_count)
42                 return -ENOSYS;
43
44         return ops->get_count(dev);
45 }
46
47 int cpu_get_vendor(struct udevice *dev, char *buf, int size)
48 {
49         struct cpu_ops *ops = cpu_get_ops(dev);
50
51         if (!ops->get_vendor)
52                 return -ENOSYS;
53
54         return ops->get_vendor(dev, buf, size);
55 }
56
57 U_BOOT_DRIVER(cpu_bus) = {
58         .name   = "cpu_bus",
59         .id     = UCLASS_SIMPLE_BUS,
60         .per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
61 };
62
63 static int uclass_cpu_init(struct uclass *uc)
64 {
65         struct udevice *dev;
66         ofnode node;
67         int ret;
68
69         node = ofnode_path("/cpus");
70         if (!ofnode_valid(node))
71                 return 0;
72
73         ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
74                                          &dev);
75
76         return ret;
77 }
78
79 UCLASS_DRIVER(cpu) = {
80         .id             = UCLASS_CPU,
81         .name           = "cpu",
82         .flags          = DM_UC_FLAG_SEQ_ALIAS,
83         .init           = uclass_cpu_init,
84 };