xref: /openbmc/u-boot/drivers/cpu/cpu-uclass.c (revision 41582e2e)
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 U_BOOT_DRIVER(cpu_bus) = {
48 	.name	= "cpu_bus",
49 	.id	= UCLASS_SIMPLE_BUS,
50 	.per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
51 };
52 
53 static int uclass_cpu_init(struct uclass *uc)
54 {
55 	struct udevice *dev;
56 	int node;
57 	int ret;
58 
59 	node = fdt_path_offset(gd->fdt_blob, "/cpus");
60 	if (node < 0)
61 		return 0;
62 
63 	ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
64 					 &dev);
65 
66 	return ret;
67 }
68 
69 UCLASS_DRIVER(cpu) = {
70 	.id		= UCLASS_CPU,
71 	.name		= "cpu",
72 	.flags		= DM_UC_FLAG_SEQ_ALIAS,
73 	.init		= uclass_cpu_init,
74 };
75