net: phy: remove mdio_board_info support from phylib

After having removed mdio_board_info usage from dsa_loop, there's no
user left. So let's drop support for it from phylib.

Signed-off-by: Heiner Kallweit <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/phy/Makefile

···
 
 ifdef CONFIG_PHYLIB
 # built-in whenever PHYLIB is built-in or module
-obj-y				+= stubs.o mdio-boardinfo.o
+obj-y				+= stubs.o
 endif
 
 libphy-$(CONFIG_SWPHY)		+= swphy.o

drivers/net/phy/mdio-boardinfo.c

···
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * mdio-boardinfo - Collect pre-declarations for MDIO devices
- */
-
-#include <linux/export.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/mutex.h>
-#include <linux/phy.h>
-#include <linux/slab.h>
-
-#include "mdio-boardinfo.h"
-
-static LIST_HEAD(mdio_board_list);
-static DEFINE_MUTEX(mdio_board_lock);
-
-struct mdio_board_entry {
-	struct list_head	list;
-	struct mdio_board_info	board_info;
-};
-
-/**
- * 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, *tmp;
-
-	mutex_lock(&mdio_board_lock);
-	list_for_each_entry_safe(be, tmp, &mdio_board_list, list) {
-		struct mdio_board_info *bi = &be->board_info;
-
-		if (strcmp(bus->id, bi->bus_id))
-			continue;
-
-		mutex_unlock(&mdio_board_lock);
-		cb(bus, bi);
-		mutex_lock(&mdio_board_lock);
-	}
-	mutex_unlock(&mdio_board_lock);
-}
-EXPORT_SYMBOL(mdiobus_setup_mdiodev_from_board_info);
-
-/**
- * mdiobus_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;
-
-	be = kcalloc(n, sizeof(*be), GFP_KERNEL);
-	if (!be)
-		return -ENOMEM;
-
-	for (int i = 0; i < n; i++, be++) {
-		be->board_info = info[i];
-		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);

drivers/net/phy/mdio-boardinfo.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * mdio-boardinfo.h - board info interface internal to the mdio_bus
- * component
- */
-
-#ifndef __MDIO_BOARD_INFO_H
-#define __MDIO_BOARD_INFO_H
-
-struct mii_bus;
-struct mdio_board_info;
-
-void mdiobus_setup_mdiodev_from_board_info(struct mii_bus *bus,
-					   int (*cb)
-					   (struct mii_bus *bus,
-					    struct mdio_board_info *bi));
-
-#endif /* __MDIO_BOARD_INFO_H */

drivers/net/phy/mdio_bus_provider.c

···
 #include <linux/uaccess.h>
 #include <linux/unistd.h>
 
-#include "mdio-boardinfo.h"
-
 /**
  * mdiobus_alloc_size - allocate a mii_bus structure
  * @size: extra amount of memory to allocate for private storage.
···
 	of_mdiobus_find_phy(dev, mdiodev, bus->dev.of_node);
 }
 #endif
-
-/**
- * mdiobus_create_device - create a full MDIO device given
- * a mdio_board_info structure
- * @bus: MDIO bus to create the devices on
- * @bi: mdio_board_info structure describing the devices
- *
- * Returns 0 on success or < 0 on error.
- */
-static int mdiobus_create_device(struct mii_bus *bus,
-				 struct mdio_board_info *bi)
-{
-	struct mdio_device *mdiodev;
-	int ret = 0;
-
-	mdiodev = mdio_device_create(bus, bi->mdio_addr);
-	if (IS_ERR(mdiodev))
-		return -ENODEV;
-
-	strscpy(mdiodev->modalias, bi->modalias,
-		sizeof(mdiodev->modalias));
-	mdiodev->dev.platform_data = (void *)bi->platform_data;
-
-	ret = mdio_device_register(mdiodev);
-	if (ret)
-		mdio_device_free(mdiodev);
-
-	return ret;
-}
 
 static struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr, bool c45)
 {
···
 		if (err)
 			goto error;
 	}
-
-	mdiobus_setup_mdiodev_from_board_info(bus, mdiobus_create_device);
 
 	bus->state = MDIOBUS_REGISTERED;
 	dev_dbg(&bus->dev, "probed\n");

include/linux/phy.h

···
 extern const struct bus_type mdio_bus_type;
 extern const struct class mdio_bus_class;
 
-struct mdio_board_info {
-	const char	*bus_id;
-	char		modalias[MDIO_NAME_SIZE];
-	int		mdio_addr;
-	const void	*platform_data;
-};
-
-int mdiobus_register_board_info(const struct mdio_board_info *info,
-				unsigned int n);
-
 /**
  * phy_module_driver() - Helper macro for registering PHY drivers
  * @__phy_drivers: array of PHY drivers to register