// SPDX-License-Identifier: GPL-2.0+

  /*
   * mdio-boardinfo - Collect pre-declarations for MDIO devices

   */
  
  #include <linux/kernel.h>
  #include <linux/slab.h>
  #include <linux/export.h>
  #include <linux/mutex.h>
  #include <linux/list.h>
  
  #include "mdio-boardinfo.h"
  
  static LIST_HEAD(mdio_board_list);
  static DEFINE_MUTEX(mdio_board_lock);
  
  /**
   * mdiobus_setup_mdiodev_from_board_info - create and setup MDIO devices
   * from pre-collected board specific MDIO information

   * @bus: Bus the board_info belongs to
   * @cb: Callback to create device on bus

   * Context: can sleep
   */

  void mdiobus_setup_mdiodev_from_board_info(struct mii_bus *bus,
  					   int (*cb)
  					   (struct mii_bus *bus,
  					    struct mdio_board_info *bi))

  {
  	struct mdio_board_entry *be;

  	struct mdio_board_entry *tmp;

  	struct mdio_board_info *bi;
  	int ret;
  
  	mutex_lock(&mdio_board_lock);

  	list_for_each_entry_safe(be, tmp, &mdio_board_list, list) {

  		bi = &be->board_info;
  
  		if (strcmp(bus->id, bi->bus_id))
  			continue;

  		mutex_unlock(&mdio_board_lock);

  		ret = cb(bus, bi);

  		mutex_lock(&mdio_board_lock);

  		if (ret)

  			continue;

  	}
  	mutex_unlock(&mdio_board_lock);
  }

  EXPORT_SYMBOL(mdiobus_setup_mdiodev_from_board_info);

  
  /**
   * mdio_register_board_info - register MDIO devices for a given board
   * @info: array of devices descriptors
   * @n: number of descriptors provided
   * Context: can sleep
   *
   * The board info passed can be marked with __initdata but be pointers
   * such as platform_data etc. are copied as-is
   */
  int mdiobus_register_board_info(const struct mdio_board_info *info,
  				unsigned int n)
  {
  	struct mdio_board_entry *be;
  	unsigned int i;
  
  	be = kcalloc(n, sizeof(*be), GFP_KERNEL);
  	if (!be)
  		return -ENOMEM;
  
  	for (i = 0; i < n; i++, be++, info++) {
  		memcpy(&be->board_info, info, sizeof(*info));
  		mutex_lock(&mdio_board_lock);
  		list_add_tail(&be->list, &mdio_board_list);
  		mutex_unlock(&mdio_board_lock);
  	}
  
  	return 0;
  }

  EXPORT_SYMBOL(mdiobus_register_board_info);