1 files changed, 0 insertions, 210 deletions
diff --git a/drivers/net/phy/mdio-mux.c b/drivers/net/phy/mdio-mux.c
deleted file mode 100644
index 6a1d3540210b..000000000000
--- a/drivers/net/phy/mdio-mux.c
+++ /dev/null
@@ -1,210 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2011, 2012 Cavium, Inc.
- */
-
-#include <linux/platform_device.h>
-#include <linux/mdio-mux.h>
-#include <linux/of_mdio.h>
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/phy.h>
-
-#define DRV_DESCRIPTION "MDIO bus multiplexer driver"
-
-struct mdio_mux_child_bus;
-
-struct mdio_mux_parent_bus {
-	struct mii_bus *mii_bus;
-	int current_child;
-	int parent_id;
-	void *switch_data;
-	int (*switch_fn)(int current_child, int desired_child, void *data);
-
-	/* List of our children linked through their next fields. */
-	struct mdio_mux_child_bus *children;
-};
-
-struct mdio_mux_child_bus {
-	struct mii_bus *mii_bus;
-	struct mdio_mux_parent_bus *parent;
-	struct mdio_mux_child_bus *next;
-	int bus_number;
-};
-
-/*
- * The parent bus' lock is used to order access to the switch_fn.
- */
-static int mdio_mux_read(struct mii_bus *bus, int phy_id, int regnum)
-{
-	struct mdio_mux_child_bus *cb = bus->priv;
-	struct mdio_mux_parent_bus *pb = cb->parent;
-	int r;
-
-	mutex_lock_nested(&pb->mii_bus->mdio_lock, MDIO_MUTEX_MUX);
-	r = pb->switch_fn(pb->current_child, cb->bus_number, pb->switch_data);
-	if (r)
-		goto out;
-
-	pb->current_child = cb->bus_number;
-
-	r = pb->mii_bus->read(pb->mii_bus, phy_id, regnum);
-out:
-	mutex_unlock(&pb->mii_bus->mdio_lock);
-
-	return r;
-}
-
-/*
- * The parent bus' lock is used to order access to the switch_fn.
- */
-static int mdio_mux_write(struct mii_bus *bus, int phy_id,
-			  int regnum, u16 val)
-{
-	struct mdio_mux_child_bus *cb = bus->priv;
-	struct mdio_mux_parent_bus *pb = cb->parent;
-
-	int r;
-
-	mutex_lock_nested(&pb->mii_bus->mdio_lock, MDIO_MUTEX_MUX);
-	r = pb->switch_fn(pb->current_child, cb->bus_number, pb->switch_data);
-	if (r)
-		goto out;
-
-	pb->current_child = cb->bus_number;
-
-	r = pb->mii_bus->write(pb->mii_bus, phy_id, regnum, val);
-out:
-	mutex_unlock(&pb->mii_bus->mdio_lock);
-
-	return r;
-}
-
-static int parent_count;
-
-int mdio_mux_init(struct device *dev,
-		  struct device_node *mux_node,
-		  int (*switch_fn)(int cur, int desired, void *data),
-		  void **mux_handle,
-		  void *data,
-		  struct mii_bus *mux_bus)
-{
-	struct device_node *parent_bus_node;
-	struct device_node *child_bus_node;
-	int r, ret_val;
-	struct mii_bus *parent_bus;
-	struct mdio_mux_parent_bus *pb;
-	struct mdio_mux_child_bus *cb;
-
-	if (!mux_node)
-		return -ENODEV;
-
-	if (!mux_bus) {
-		parent_bus_node = of_parse_phandle(mux_node,
-						   "mdio-parent-bus", 0);
-
-		if (!parent_bus_node)
-			return -ENODEV;
-
-		parent_bus = of_mdio_find_bus(parent_bus_node);
-		if (!parent_bus) {
-			ret_val = -EPROBE_DEFER;
-			goto err_parent_bus;
-		}
-	} else {
-		parent_bus_node = NULL;
-		parent_bus = mux_bus;
-		get_device(&parent_bus->dev);
-	}
-
-	pb = devm_kzalloc(dev, sizeof(*pb), GFP_KERNEL);
-	if (!pb) {
-		ret_val = -ENOMEM;
-		goto err_pb_kz;
-	}
-
-	pb->switch_data = data;
-	pb->switch_fn = switch_fn;
-	pb->current_child = -1;
-	pb->parent_id = parent_count++;
-	pb->mii_bus = parent_bus;
-
-	ret_val = -ENODEV;
-	for_each_available_child_of_node(mux_node, child_bus_node) {
-		int v;
-
-		r = of_property_read_u32(child_bus_node, "reg", &v);
-		if (r) {
-			dev_err(dev,
-				"Error: Failed to find reg for child %pOF\n",
-				child_bus_node);
-			continue;
-		}
-
-		cb = devm_kzalloc(dev, sizeof(*cb), GFP_KERNEL);
-		if (!cb) {
-			ret_val = -ENOMEM;
-			continue;
-		}
-		cb->bus_number = v;
-		cb->parent = pb;
-
-		cb->mii_bus = mdiobus_alloc();
-		if (!cb->mii_bus) {
-			ret_val = -ENOMEM;
-			devm_kfree(dev, cb);
-			continue;
-		}
-		cb->mii_bus->priv = cb;
-
-		cb->mii_bus->name = "mdio_mux";
-		snprintf(cb->mii_bus->id, MII_BUS_ID_SIZE, "%x.%x",
-			 pb->parent_id, v);
-		cb->mii_bus->parent = dev;
-		cb->mii_bus->read = mdio_mux_read;
-		cb->mii_bus->write = mdio_mux_write;
-		r = of_mdiobus_register(cb->mii_bus, child_bus_node);
-		if (r) {
-			dev_err(dev,
-				"Error: Failed to register MDIO bus for child %pOF\n",
-				child_bus_node);
-			mdiobus_free(cb->mii_bus);
-			devm_kfree(dev, cb);
-		} else {
-			cb->next = pb->children;
-			pb->children = cb;
-		}
-	}
-	if (pb->children) {
-		*mux_handle = pb;
-		return 0;
-	}
-
-	dev_err(dev, "Error: No acceptable child buses found\n");
-	devm_kfree(dev, pb);
-err_pb_kz:
-	put_device(&parent_bus->dev);
-err_parent_bus:
-	of_node_put(parent_bus_node);
-	return ret_val;
-}
-EXPORT_SYMBOL_GPL(mdio_mux_init);
-
-void mdio_mux_uninit(void *mux_handle)
-{
-	struct mdio_mux_parent_bus *pb = mux_handle;
-	struct mdio_mux_child_bus *cb = pb->children;
-
-	while (cb) {
-		mdiobus_unregister(cb->mii_bus);
-		mdiobus_free(cb->mii_bus);
-		cb = cb->next;
-	}
-
-	put_device(&pb->mii_bus->dev);
-}
-EXPORT_SYMBOL_GPL(mdio_mux_uninit);
-
-MODULE_DESCRIPTION(DRV_DESCRIPTION);
-MODULE_AUTHOR("David Daney");
-MODULE_LICENSE("GPL v2");