linux/drivers/hsi/hsi_boardinfo.c
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   1/*
   2 * HSI clients registration interface
   3 *
   4 * Copyright (C) 2010 Nokia Corporation. All rights reserved.
   5 *
   6 * Contact: Carlos Chinea <carlos.chinea@nokia.com>
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License
  10 * version 2 as published by the Free Software Foundation.
  11 *
  12 * This program is distributed in the hope that it will be useful, but
  13 * WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 * General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20 * 02110-1301 USA
  21 */
  22#include <linux/hsi/hsi.h>
  23#include <linux/list.h>
  24#include <linux/slab.h>
  25#include "hsi_core.h"
  26
  27/*
  28 * hsi_board_list is only used internally by the HSI framework.
  29 * No one else is allowed to make use of it.
  30 */
  31LIST_HEAD(hsi_board_list);
  32EXPORT_SYMBOL_GPL(hsi_board_list);
  33
  34/**
  35 * hsi_register_board_info - Register HSI clients information
  36 * @info: Array of HSI clients on the board
  37 * @len: Length of the array
  38 *
  39 * HSI clients are statically declared and registered on board files.
  40 *
  41 * HSI clients will be automatically registered to the HSI bus once the
  42 * controller and the port where the clients wishes to attach are registered
  43 * to it.
  44 *
  45 * Return -errno on failure, 0 on success.
  46 */
  47int __init hsi_register_board_info(struct hsi_board_info const *info,
  48                                                        unsigned int len)
  49{
  50        struct hsi_cl_info *cl_info;
  51
  52        cl_info = kzalloc(sizeof(*cl_info) * len, GFP_KERNEL);
  53        if (!cl_info)
  54                return -ENOMEM;
  55
  56        for (; len; len--, info++, cl_info++) {
  57                cl_info->info = *info;
  58                list_add_tail(&cl_info->list, &hsi_board_list);
  59        }
  60
  61        return 0;
  62}
  63
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