1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * HSI clients registration interface |
4 | * |
5 | * Copyright (C) 2010 Nokia Corporation. All rights reserved. |
6 | * |
7 | * Contact: Carlos Chinea <carlos.chinea@nokia.com> |
8 | */ |
9 | #include <linux/hsi/hsi.h> |
10 | #include <linux/list.h> |
11 | #include <linux/slab.h> |
12 | #include "hsi_core.h" |
13 | |
14 | /* |
15 | * hsi_board_list is only used internally by the HSI framework. |
16 | * No one else is allowed to make use of it. |
17 | */ |
18 | LIST_HEAD(hsi_board_list); |
19 | EXPORT_SYMBOL_GPL(hsi_board_list); |
20 | |
21 | /** |
22 | * hsi_register_board_info - Register HSI clients information |
23 | * @info: Array of HSI clients on the board |
24 | * @len: Length of the array |
25 | * |
26 | * HSI clients are statically declared and registered on board files. |
27 | * |
28 | * HSI clients will be automatically registered to the HSI bus once the |
29 | * controller and the port where the clients wishes to attach are registered |
30 | * to it. |
31 | * |
32 | * Return -errno on failure, 0 on success. |
33 | */ |
34 | int __init hsi_register_board_info(struct hsi_board_info const *info, |
35 | unsigned int len) |
36 | { |
37 | struct hsi_cl_info *cl_info; |
38 | |
39 | cl_info = kcalloc(n: len, size: sizeof(*cl_info), GFP_KERNEL); |
40 | if (!cl_info) |
41 | return -ENOMEM; |
42 | |
43 | for (; len; len--, info++, cl_info++) { |
44 | cl_info->info = *info; |
45 | list_add_tail(new: &cl_info->list, head: &hsi_board_list); |
46 | } |
47 | |
48 | return 0; |
49 | } |
50 | |