drivers/net/phy/mdio-boardinfo.c

   1 /*
   2  * mdio-boardinfo - Collect pre-declarations for MDIO devices
   3  *
   4  * This program is free software; you can redistribute  it and/or modify it
   5  * under  the terms of  the GNU General  Public License as published by the
   6  * Free Software Foundation;  either version 2 of the  License, or (at your
   7  * option) any later version.
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/slab.h>
  12 #include <linux/export.h>
  13 #include <linux/mutex.h>
  14 #include <linux/list.h>
  15
  16 #include "mdio-boardinfo.h"
  17
  18 static LIST_HEAD(mdio_board_list);
  19 static DEFINE_MUTEX(mdio_board_lock);
  20
  21 /**
  22  * mdiobus_setup_mdiodev_from_board_info - create and setup MDIO devices
  23  * from pre-collected board specific MDIO information
  24  * @mdiodev: MDIO device pointer
  25  * Context: can sleep
  26  */
  27 void mdiobus_setup_mdiodev_from_board_info(struct mii_bus *bus,
  28                                            int (*cb)
  29                                            (struct mii_bus *bus,
  30                                             struct mdio_board_info *bi))
  31 {
  32         struct mdio_board_entry *be;
  33         struct mdio_board_info *bi;
  34         int ret;
  35
  36         mutex_lock(&mdio_board_lock);
  37         list_for_each_entry(be, &mdio_board_list, list) {
  38                 bi = &be->board_info;
  39
  40                 if (strcmp(bus->id, bi->bus_id))
  41                         continue;
  42
  43                 ret = cb(bus, bi);
  44                 if (ret)
  45                         continue;
  46
  47         }
  48         mutex_unlock(&mdio_board_lock);
  49 }
  50 EXPORT_SYMBOL(mdiobus_setup_mdiodev_from_board_info);
  51
  52 /**
  53  * mdio_register_board_info - register MDIO devices for a given board
  54  * @info: array of devices descriptors
  55  * @n: number of descriptors provided
  56  * Context: can sleep
  57  *
  58  * The board info passed can be marked with __initdata but be pointers
  59  * such as platform_data etc. are copied as-is
  60  */
  61 int mdiobus_register_board_info(const struct mdio_board_info *info,
  62                                 unsigned int n)
  63 {
  64         struct mdio_board_entry *be;
  65         unsigned int i;
  66
  67         be = kcalloc(n, sizeof(*be), GFP_KERNEL);
  68         if (!be)
  69                 return -ENOMEM;
  70
  71         for (i = 0; i < n; i++, be++, info++) {
  72                 memcpy(&be->board_info, info, sizeof(*info));
  73                 mutex_lock(&mdio_board_lock);
  74                 list_add_tail(&be->list, &mdio_board_list);
  75                 mutex_unlock(&mdio_board_lock);
  76         }
  77
  78         return 0;
  79 }
  80 EXPORT_SYMBOL(mdiobus_register_board_info);