dm: cpu: Add a new get_count method to cpu uclass
[oweals/u-boot.git] / 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_info)
30                 return -ENOSYS;
31
32         return ops->get_info(dev, info);
33 }
34
35 int cpu_get_count(struct udevice *dev)
36 {
37         struct cpu_ops *ops = cpu_get_ops(dev);
38
39         if (!ops->get_count)
40                 return -ENOSYS;
41
42         return ops->get_count(dev);
43 }
44
45 U_BOOT_DRIVER(cpu_bus) = {
46         .name   = "cpu_bus",
47         .id     = UCLASS_SIMPLE_BUS,
48         .per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
49 };
50
51 static int uclass_cpu_init(struct uclass *uc)
52 {
53         struct udevice *dev;
54         int node;
55         int ret;
56
57         node = fdt_path_offset(gd->fdt_blob, "/cpus");
58         if (node < 0)
59                 return 0;
60
61         ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
62                                          &dev);
63
64         return ret;
65 }
66
67 UCLASS_DRIVER(cpu) = {
68         .id             = UCLASS_CPU,
69         .name           = "cpu",
70         .flags          = DM_UC_FLAG_SEQ_ALIAS,
71         .init           = uclass_cpu_init,
72 };