drivers/hsi/hsi_boardinfo.c

   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(len, 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(&cl_info->list, &hsi_board_list);
  46         }
  47
  48         return 0;
  49 }