Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3576 insertions, 0 deletions

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
new file mode 100644
index 000000000..a42df2c1b
--- /dev/null
+++ b/drivers/net/phy/phy_device.c
@@ -0,0 +1,3576 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Framework for finding and configuring PHYs.
+ * Also contains generic PHY driver
+ *
+ * Author: Andy Fleming
+ *
+ * Copyright (c) 2004 Freescale Semiconductor, Inc.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/acpi.h>
+#include <linux/bitmap.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/mdio.h>
+#include <linux/mii.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+#include <linux/phylib_stubs.h>
+#include <linux/phy_led_triggers.h>
+#include <linux/pse-pd/pse.h>
+#include <linux/property.h>
+#include <linux/rtnetlink.h>
+#include <linux/sfp.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/uaccess.h>
+#include <linux/unistd.h>
+
+MODULE_DESCRIPTION("PHY library");
+MODULE_AUTHOR("Andy Fleming");
+MODULE_LICENSE("GPL");
+
+__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init;
+EXPORT_SYMBOL_GPL(phy_basic_features);
+
+__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init;
+EXPORT_SYMBOL_GPL(phy_basic_t1_features);
+
+__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1s_p2mp_features) __ro_after_init;
+EXPORT_SYMBOL_GPL(phy_basic_t1s_p2mp_features);
+
+__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init;
+EXPORT_SYMBOL_GPL(phy_gbit_features);
+
+__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init;
+EXPORT_SYMBOL_GPL(phy_gbit_fibre_features);
+
+__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init;
+EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features);
+
+__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init;
+EXPORT_SYMBOL_GPL(phy_10gbit_features);
+
+__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init;
+EXPORT_SYMBOL_GPL(phy_10gbit_fec_features);
+
+const int phy_basic_ports_array[3] = {
+	ETHTOOL_LINK_MODE_Autoneg_BIT,
+	ETHTOOL_LINK_MODE_TP_BIT,
+	ETHTOOL_LINK_MODE_MII_BIT,
+};
+EXPORT_SYMBOL_GPL(phy_basic_ports_array);
+
+const int phy_fibre_port_array[1] = {
+	ETHTOOL_LINK_MODE_FIBRE_BIT,
+};
+EXPORT_SYMBOL_GPL(phy_fibre_port_array);
+
+const int phy_all_ports_features_array[7] = {
+	ETHTOOL_LINK_MODE_Autoneg_BIT,
+	ETHTOOL_LINK_MODE_TP_BIT,
+	ETHTOOL_LINK_MODE_MII_BIT,
+	ETHTOOL_LINK_MODE_FIBRE_BIT,
+	ETHTOOL_LINK_MODE_AUI_BIT,
+	ETHTOOL_LINK_MODE_BNC_BIT,
+	ETHTOOL_LINK_MODE_Backplane_BIT,
+};
+EXPORT_SYMBOL_GPL(phy_all_ports_features_array);
+
+const int phy_10_100_features_array[4] = {
+	ETHTOOL_LINK_MODE_10baseT_Half_BIT,
+	ETHTOOL_LINK_MODE_10baseT_Full_BIT,
+	ETHTOOL_LINK_MODE_100baseT_Half_BIT,
+	ETHTOOL_LINK_MODE_100baseT_Full_BIT,
+};
+EXPORT_SYMBOL_GPL(phy_10_100_features_array);
+
+const int phy_basic_t1_features_array[3] = {
+	ETHTOOL_LINK_MODE_TP_BIT,
+	ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
+	ETHTOOL_LINK_MODE_100baseT1_Full_BIT,
+};
+EXPORT_SYMBOL_GPL(phy_basic_t1_features_array);
+
+const int phy_basic_t1s_p2mp_features_array[2] = {
+	ETHTOOL_LINK_MODE_TP_BIT,
+	ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT,
+};
+EXPORT_SYMBOL_GPL(phy_basic_t1s_p2mp_features_array);
+
+const int phy_gbit_features_array[2] = {
+	ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
+	ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
+};
+EXPORT_SYMBOL_GPL(phy_gbit_features_array);
+
+const int phy_10gbit_features_array[1] = {
+	ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
+};
+EXPORT_SYMBOL_GPL(phy_10gbit_features_array);
+
+static const int phy_10gbit_fec_features_array[1] = {
+	ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
+};
+
+__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_full_features) __ro_after_init;
+EXPORT_SYMBOL_GPL(phy_10gbit_full_features);
+
+static const int phy_10gbit_full_features_array[] = {
+	ETHTOOL_LINK_MODE_10baseT_Full_BIT,
+	ETHTOOL_LINK_MODE_100baseT_Full_BIT,
+	ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
+	ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
+};
+
+static const int phy_eee_cap1_features_array[] = {
+	ETHTOOL_LINK_MODE_100baseT_Full_BIT,
+	ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
+	ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
+	ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
+	ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
+	ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
+};
+
+__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_eee_cap1_features) __ro_after_init;
+EXPORT_SYMBOL_GPL(phy_eee_cap1_features);
+
+static void features_init(void)
+{
+	/* 10/100 half/full*/
+	linkmode_set_bit_array(phy_basic_ports_array,
+			       ARRAY_SIZE(phy_basic_ports_array),
+			       phy_basic_features);
+	linkmode_set_bit_array(phy_10_100_features_array,
+			       ARRAY_SIZE(phy_10_100_features_array),
+			       phy_basic_features);
+
+	/* 100 full, TP */
+	linkmode_set_bit_array(phy_basic_t1_features_array,
+			       ARRAY_SIZE(phy_basic_t1_features_array),
+			       phy_basic_t1_features);
+
+	/* 10 half, P2MP, TP */
+	linkmode_set_bit_array(phy_basic_t1s_p2mp_features_array,
+			       ARRAY_SIZE(phy_basic_t1s_p2mp_features_array),
+			       phy_basic_t1s_p2mp_features);
+
+	/* 10/100 half/full + 1000 half/full */
+	linkmode_set_bit_array(phy_basic_ports_array,
+			       ARRAY_SIZE(phy_basic_ports_array),
+			       phy_gbit_features);
+	linkmode_set_bit_array(phy_10_100_features_array,
+			       ARRAY_SIZE(phy_10_100_features_array),
+			       phy_gbit_features);
+	linkmode_set_bit_array(phy_gbit_features_array,
+			       ARRAY_SIZE(phy_gbit_features_array),
+			       phy_gbit_features);
+
+	/* 10/100 half/full + 1000 half/full + fibre*/
+	linkmode_set_bit_array(phy_basic_ports_array,
+			       ARRAY_SIZE(phy_basic_ports_array),
+			       phy_gbit_fibre_features);
+	linkmode_set_bit_array(phy_10_100_features_array,
+			       ARRAY_SIZE(phy_10_100_features_array),
+			       phy_gbit_fibre_features);
+	linkmode_set_bit_array(phy_gbit_features_array,
+			       ARRAY_SIZE(phy_gbit_features_array),
+			       phy_gbit_fibre_features);
+	linkmode_set_bit_array(phy_fibre_port_array,
+			       ARRAY_SIZE(phy_fibre_port_array),
+			       phy_gbit_fibre_features);
+
+	/* 10/100 half/full + 1000 half/full + TP/MII/FIBRE/AUI/BNC/Backplane*/
+	linkmode_set_bit_array(phy_all_ports_features_array,
+			       ARRAY_SIZE(phy_all_ports_features_array),
+			       phy_gbit_all_ports_features);
+	linkmode_set_bit_array(phy_10_100_features_array,
+			       ARRAY_SIZE(phy_10_100_features_array),
+			       phy_gbit_all_ports_features);
+	linkmode_set_bit_array(phy_gbit_features_array,
+			       ARRAY_SIZE(phy_gbit_features_array),
+			       phy_gbit_all_ports_features);
+
+	/* 10/100 half/full + 1000 half/full + 10G full*/
+	linkmode_set_bit_array(phy_all_ports_features_array,
+			       ARRAY_SIZE(phy_all_ports_features_array),
+			       phy_10gbit_features);
+	linkmode_set_bit_array(phy_10_100_features_array,
+			       ARRAY_SIZE(phy_10_100_features_array),
+			       phy_10gbit_features);
+	linkmode_set_bit_array(phy_gbit_features_array,
+			       ARRAY_SIZE(phy_gbit_features_array),
+			       phy_10gbit_features);
+	linkmode_set_bit_array(phy_10gbit_features_array,
+			       ARRAY_SIZE(phy_10gbit_features_array),
+			       phy_10gbit_features);
+
+	/* 10/100/1000/10G full */
+	linkmode_set_bit_array(phy_all_ports_features_array,
+			       ARRAY_SIZE(phy_all_ports_features_array),
+			       phy_10gbit_full_features);
+	linkmode_set_bit_array(phy_10gbit_full_features_array,
+			       ARRAY_SIZE(phy_10gbit_full_features_array),
+			       phy_10gbit_full_features);
+	/* 10G FEC only */
+	linkmode_set_bit_array(phy_10gbit_fec_features_array,
+			       ARRAY_SIZE(phy_10gbit_fec_features_array),
+			       phy_10gbit_fec_features);
+	linkmode_set_bit_array(phy_eee_cap1_features_array,
+			       ARRAY_SIZE(phy_eee_cap1_features_array),
+			       phy_eee_cap1_features);
+
+}
+
+void phy_device_free(struct phy_device *phydev)
+{
+	put_device(&phydev->mdio.dev);
+}
+EXPORT_SYMBOL(phy_device_free);
+
+static void phy_mdio_device_free(struct mdio_device *mdiodev)
+{
+	struct phy_device *phydev;
+
+	phydev = container_of(mdiodev, struct phy_device, mdio);
+	phy_device_free(phydev);
+}
+
+static void phy_device_release(struct device *dev)
+{
+	fwnode_handle_put(dev->fwnode);
+	kfree(to_phy_device(dev));
+}
+
+static void phy_mdio_device_remove(struct mdio_device *mdiodev)
+{
+	struct phy_device *phydev;
+
+	phydev = container_of(mdiodev, struct phy_device, mdio);
+	phy_device_remove(phydev);
+}
+
+static struct phy_driver genphy_driver;
+
+static LIST_HEAD(phy_fixup_list);
+static DEFINE_MUTEX(phy_fixup_lock);
+
+static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
+{
+	struct device_driver *drv = phydev->mdio.dev.driver;
+	struct phy_driver *phydrv = to_phy_driver(drv);
+	struct net_device *netdev = phydev->attached_dev;
+
+	if (!drv || !phydrv->suspend)
+		return false;
+
+	/* PHY not attached? May suspend if the PHY has not already been
+	 * suspended as part of a prior call to phy_disconnect() ->
+	 * phy_detach() -> phy_suspend() because the parent netdev might be the
+	 * MDIO bus driver and clock gated at this point.
+	 */
+	if (!netdev)
+		goto out;
+
+	if (netdev->wol_enabled)
+		return false;
+
+	/* As long as not all affected network drivers support the
+	 * wol_enabled flag, let's check for hints that WoL is enabled.
+	 * Don't suspend PHY if the attached netdev parent may wake up.
+	 * The parent may point to a PCI device, as in tg3 driver.
+	 */
+	if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
+		return false;
+
+	/* Also don't suspend PHY if the netdev itself may wakeup. This
+	 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
+	 * e.g. SoC devices.
+	 */
+	if (device_may_wakeup(&netdev->dev))
+		return false;
+
+out:
+	return !phydev->suspended;
+}
+
+static __maybe_unused int mdio_bus_phy_suspend(struct device *dev)
+{
+	struct phy_device *phydev = to_phy_device(dev);
+
+	if (phydev->mac_managed_pm)
+		return 0;
+
+	/* Wakeup interrupts may occur during the system sleep transition when
+	 * the PHY is inaccessible. Set flag to postpone handling until the PHY
+	 * has resumed. Wait for concurrent interrupt handler to complete.
+	 */
+	if (phy_interrupt_is_valid(phydev)) {
+		phydev->irq_suspended = 1;
+		synchronize_irq(phydev->irq);
+	}
+
+	/* We must stop the state machine manually, otherwise it stops out of
+	 * control, possibly with the phydev->lock held. Upon resume, netdev
+	 * may call phy routines that try to grab the same lock, and that may
+	 * lead to a deadlock.
+	 */
+	if (phydev->attached_dev && phydev->adjust_link)
+		phy_stop_machine(phydev);
+
+	if (!mdio_bus_phy_may_suspend(phydev))
+		return 0;
+
+	phydev->suspended_by_mdio_bus = 1;
+
+	return phy_suspend(phydev);
+}
+
+static __maybe_unused int mdio_bus_phy_resume(struct device *dev)
+{
+	struct phy_device *phydev = to_phy_device(dev);
+	int ret;
+
+	if (phydev->mac_managed_pm)
+		return 0;
+
+	if (!phydev->suspended_by_mdio_bus)
+		goto no_resume;
+
+	phydev->suspended_by_mdio_bus = 0;
+
+	/* If we managed to get here with the PHY state machine in a state
+	 * neither PHY_HALTED, PHY_READY nor PHY_UP, this is an indication
+	 * that something went wrong and we should most likely be using
+	 * MAC managed PM, but we are not.
+	 */
+	WARN_ON(phydev->state != PHY_HALTED && phydev->state != PHY_READY &&
+		phydev->state != PHY_UP);
+
+	ret = phy_init_hw(phydev);
+	if (ret < 0)
+		return ret;
+
+	ret = phy_resume(phydev);
+	if (ret < 0)
+		return ret;
+no_resume:
+	if (phy_interrupt_is_valid(phydev)) {
+		phydev->irq_suspended = 0;
+		synchronize_irq(phydev->irq);
+
+		/* Rerun interrupts which were postponed by phy_interrupt()
+		 * because they occurred during the system sleep transition.
+		 */
+		if (phydev->irq_rerun) {
+			phydev->irq_rerun = 0;
+			enable_irq(phydev->irq);
+			irq_wake_thread(phydev->irq, phydev);
+		}
+	}
+
+	if (phydev->attached_dev && phydev->adjust_link)
+		phy_start_machine(phydev);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(mdio_bus_phy_pm_ops, mdio_bus_phy_suspend,
+			 mdio_bus_phy_resume);
+
+/**
+ * phy_register_fixup - creates a new phy_fixup and adds it to the list
+ * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
+ * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
+ *	It can also be PHY_ANY_UID
+ * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
+ *	comparison
+ * @run: The actual code to be run when a matching PHY is found
+ */
+int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
+		       int (*run)(struct phy_device *))
+{
+	struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
+
+	if (!fixup)
+		return -ENOMEM;
+
+	strscpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
+	fixup->phy_uid = phy_uid;
+	fixup->phy_uid_mask = phy_uid_mask;
+	fixup->run = run;
+
+	mutex_lock(&phy_fixup_lock);
+	list_add_tail(&fixup->list, &phy_fixup_list);
+	mutex_unlock(&phy_fixup_lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(phy_register_fixup);
+
+/* Registers a fixup to be run on any PHY with the UID in phy_uid */
+int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
+			       int (*run)(struct phy_device *))
+{
+	return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
+}
+EXPORT_SYMBOL(phy_register_fixup_for_uid);
+
+/* Registers a fixup to be run on the PHY with id string bus_id */
+int phy_register_fixup_for_id(const char *bus_id,
+			      int (*run)(struct phy_device *))
+{
+	return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
+}
+EXPORT_SYMBOL(phy_register_fixup_for_id);
+
+/**
+ * phy_unregister_fixup - remove a phy_fixup from the list
+ * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
+ * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
+ * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
+ */
+int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
+{
+	struct list_head *pos, *n;
+	struct phy_fixup *fixup;
+	int ret;
+
+	ret = -ENODEV;
+
+	mutex_lock(&phy_fixup_lock);
+	list_for_each_safe(pos, n, &phy_fixup_list) {
+		fixup = list_entry(pos, struct phy_fixup, list);
+
+		if ((!strcmp(fixup->bus_id, bus_id)) &&
+		    phy_id_compare(fixup->phy_uid, phy_uid, phy_uid_mask)) {
+			list_del(&fixup->list);
+			kfree(fixup);
+			ret = 0;
+			break;
+		}
+	}
+	mutex_unlock(&phy_fixup_lock);
+
+	return ret;
+}
+EXPORT_SYMBOL(phy_unregister_fixup);
+
+/* Unregisters a fixup of any PHY with the UID in phy_uid */
+int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
+{
+	return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
+}
+EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
+
+/* Unregisters a fixup of the PHY with id string bus_id */
+int phy_unregister_fixup_for_id(const char *bus_id)
+{
+	return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
+}
+EXPORT_SYMBOL(phy_unregister_fixup_for_id);
+
+/* Returns 1 if fixup matches phydev in bus_id and phy_uid.
+ * Fixups can be set to match any in one or more fields.
+ */
+static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
+{
+	if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
+		if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
+			return 0;
+
+	if (!phy_id_compare(phydev->phy_id, fixup->phy_uid,
+			    fixup->phy_uid_mask))
+		if (fixup->phy_uid != PHY_ANY_UID)
+			return 0;
+
+	return 1;
+}
+
+/* Runs any matching fixups for this phydev */
+static int phy_scan_fixups(struct phy_device *phydev)
+{
+	struct phy_fixup *fixup;
+
+	mutex_lock(&phy_fixup_lock);
+	list_for_each_entry(fixup, &phy_fixup_list, list) {
+		if (phy_needs_fixup(phydev, fixup)) {
+			int err = fixup->run(phydev);
+
+			if (err < 0) {
+				mutex_unlock(&phy_fixup_lock);
+				return err;
+			}
+			phydev->has_fixups = true;
+		}
+	}
+	mutex_unlock(&phy_fixup_lock);
+
+	return 0;
+}
+
+static int phy_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct phy_device *phydev = to_phy_device(dev);
+	struct phy_driver *phydrv = to_phy_driver(drv);
+	const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
+	int i;
+
+	if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
+		return 0;
+
+	if (phydrv->match_phy_device)
+		return phydrv->match_phy_device(phydev);
+
+	if (phydev->is_c45) {
+		for (i = 1; i < num_ids; i++) {
+			if (phydev->c45_ids.device_ids[i] == 0xffffffff)
+				continue;
+
+			if (phy_id_compare(phydev->c45_ids.device_ids[i],
+					   phydrv->phy_id, phydrv->phy_id_mask))
+				return 1;
+		}
+		return 0;
+	} else {
+		return phy_id_compare(phydev->phy_id, phydrv->phy_id,
+				      phydrv->phy_id_mask);
+	}
+}
+
+static ssize_t
+phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct phy_device *phydev = to_phy_device(dev);
+
+	return sysfs_emit(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
+}
+static DEVICE_ATTR_RO(phy_id);
+
+static ssize_t
+phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct phy_device *phydev = to_phy_device(dev);
+	const char *mode = NULL;
+
+	if (phy_is_internal(phydev))
+		mode = "internal";
+	else
+		mode = phy_modes(phydev->interface);
+
+	return sysfs_emit(buf, "%s\n", mode);
+}
+static DEVICE_ATTR_RO(phy_interface);
+
+static ssize_t
+phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
+		    char *buf)
+{
+	struct phy_device *phydev = to_phy_device(dev);
+
+	return sysfs_emit(buf, "%d\n", phydev->has_fixups);
+}
+static DEVICE_ATTR_RO(phy_has_fixups);
+
+static ssize_t phy_dev_flags_show(struct device *dev,
+				  struct device_attribute *attr,
+				  char *buf)
+{
+	struct phy_device *phydev = to_phy_device(dev);
+
+	return sysfs_emit(buf, "0x%08x\n", phydev->dev_flags);
+}
+static DEVICE_ATTR_RO(phy_dev_flags);
+
+static struct attribute *phy_dev_attrs[] = {
+	&dev_attr_phy_id.attr,
+	&dev_attr_phy_interface.attr,
+	&dev_attr_phy_has_fixups.attr,
+	&dev_attr_phy_dev_flags.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(phy_dev);
+
+static const struct device_type mdio_bus_phy_type = {
+	.name = "PHY",
+	.groups = phy_dev_groups,
+	.release = phy_device_release,
+	.pm = pm_ptr(&mdio_bus_phy_pm_ops),
+};
+
+static int phy_request_driver_module(struct phy_device *dev, u32 phy_id)
+{
+	int ret;
+
+	ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
+			     MDIO_ID_ARGS(phy_id));
+	/* We only check for failures in executing the usermode binary,
+	 * not whether a PHY driver module exists for the PHY ID.
+	 * Accept -ENOENT because this may occur in case no initramfs exists,
+	 * then modprobe isn't available.
+	 */
+	if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) {
+		phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n",
+			   ret, (unsigned long)phy_id);
+		return ret;
+	}
+
+	return 0;
+}
+
+struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
+				     bool is_c45,
+				     struct phy_c45_device_ids *c45_ids)
+{
+	struct phy_device *dev;
+	struct mdio_device *mdiodev;
+	int ret = 0;
+
+	/* We allocate the device, and initialize the default values */
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+
+	mdiodev = &dev->mdio;
+	mdiodev->dev.parent = &bus->dev;
+	mdiodev->dev.bus = &mdio_bus_type;
+	mdiodev->dev.type = &mdio_bus_phy_type;
+	mdiodev->bus = bus;
+	mdiodev->bus_match = phy_bus_match;
+	mdiodev->addr = addr;
+	mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
+	mdiodev->device_free = phy_mdio_device_free;
+	mdiodev->device_remove = phy_mdio_device_remove;
+
+	dev->speed = SPEED_UNKNOWN;
+	dev->duplex = DUPLEX_UNKNOWN;
+	dev->pause = 0;
+	dev->asym_pause = 0;
+	dev->link = 0;
+	dev->port = PORT_TP;
+	dev->interface = PHY_INTERFACE_MODE_GMII;
+
+	dev->autoneg = AUTONEG_ENABLE;
+
+	dev->pma_extable = -ENODATA;
+	dev->is_c45 = is_c45;
+	dev->phy_id = phy_id;
+	if (c45_ids)
+		dev->c45_ids = *c45_ids;
+	dev->irq = bus->irq[addr];
+
+	dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
+	device_initialize(&mdiodev->dev);
+
+	dev->state = PHY_DOWN;
+	INIT_LIST_HEAD(&dev->leds);
+
+	mutex_init(&dev->lock);
+	INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
+
+	/* Request the appropriate module unconditionally; don't
+	 * bother trying to do so only if it isn't already loaded,
+	 * because that gets complicated. A hotplug event would have
+	 * done an unconditional modprobe anyway.
+	 * We don't do normal hotplug because it won't work for MDIO
+	 * -- because it relies on the device staying around for long
+	 * enough for the driver to get loaded. With MDIO, the NIC
+	 * driver will get bored and give up as soon as it finds that
+	 * there's no driver _already_ loaded.
+	 */
+	if (is_c45 && c45_ids) {
+		const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
+		int i;
+
+		for (i = 1; i < num_ids; i++) {
+			if (c45_ids->device_ids[i] == 0xffffffff)
+				continue;
+
+			ret = phy_request_driver_module(dev,
+						c45_ids->device_ids[i]);
+			if (ret)
+				break;
+		}
+	} else {
+		ret = phy_request_driver_module(dev, phy_id);
+	}
+
+	if (ret) {
+		put_device(&mdiodev->dev);
+		dev = ERR_PTR(ret);
+	}
+
+	return dev;
+}
+EXPORT_SYMBOL(phy_device_create);
+
+/* phy_c45_probe_present - checks to see if a MMD is present in the package
+ * @bus: the target MII bus
+ * @prtad: PHY package address on the MII bus
+ * @devad: PHY device (MMD) address
+ *
+ * Read the MDIO_STAT2 register, and check whether a device is responding
+ * at this address.
+ *
+ * Returns: negative error number on bus access error, zero if no device
+ * is responding, or positive if a device is present.
+ */
+static int phy_c45_probe_present(struct mii_bus *bus, int prtad, int devad)
+{
+	int stat2;
+
+	stat2 = mdiobus_c45_read(bus, prtad, devad, MDIO_STAT2);
+	if (stat2 < 0)
+		return stat2;
+
+	return (stat2 & MDIO_STAT2_DEVPRST) == MDIO_STAT2_DEVPRST_VAL;
+}
+
+/* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
+ * @bus: the target MII bus
+ * @addr: PHY address on the MII bus
+ * @dev_addr: MMD address in the PHY.
+ * @devices_in_package: where to store the devices in package information.
+ *
+ * Description: reads devices in package registers of a MMD at @dev_addr
+ * from PHY at @addr on @bus.
+ *
+ * Returns: 0 on success, -EIO on failure.
+ */
+static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
+				   u32 *devices_in_package)
+{
+	int phy_reg;
+
+	phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS2);
+	if (phy_reg < 0)
+		return -EIO;
+	*devices_in_package = phy_reg << 16;
+
+	phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS1);
+	if (phy_reg < 0)
+		return -EIO;
+	*devices_in_package |= phy_reg;
+
+	return 0;
+}
+
+/**
+ * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
+ * @bus: the target MII bus
+ * @addr: PHY address on the MII bus
+ * @c45_ids: where to store the c45 ID information.
+ *
+ * Read the PHY "devices in package". If this appears to be valid, read
+ * the PHY identifiers for each device. Return the "devices in package"
+ * and identifiers in @c45_ids.
+ *
+ * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
+ * the "devices in package" is invalid.
+ */
+static int get_phy_c45_ids(struct mii_bus *bus, int addr,
+			   struct phy_c45_device_ids *c45_ids)
+{
+	const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
+	u32 devs_in_pkg = 0;
+	int i, ret, phy_reg;
+
+	/* Find first non-zero Devices In package. Device zero is reserved
+	 * for 802.3 c45 complied PHYs, so don't probe it at first.
+	 */
+	for (i = 1; i < MDIO_MMD_NUM && (devs_in_pkg == 0 ||
+	     (devs_in_pkg & 0x1fffffff) == 0x1fffffff); i++) {
+		if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
+			/* Check that there is a device present at this
+			 * address before reading the devices-in-package
+			 * register to avoid reading garbage from the PHY.
+			 * Some PHYs (88x3310) vendor space is not IEEE802.3
+			 * compliant.
+			 */
+			ret = phy_c45_probe_present(bus, addr, i);
+			if (ret < 0)
+				return -EIO;
+
+			if (!ret)
+				continue;
+		}
+		phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, &devs_in_pkg);
+		if (phy_reg < 0)
+			return -EIO;
+	}
+
+	if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) {
+		/* If mostly Fs, there is no device there, then let's probe
+		 * MMD 0, as some 10G PHYs have zero Devices In package,
+		 * e.g. Cortina CS4315/CS4340 PHY.
+		 */
+		phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, &devs_in_pkg);
+		if (phy_reg < 0)
+			return -EIO;
+
+		/* no device there, let's get out of here */
+		if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff)
+			return -ENODEV;
+	}
+
+	/* Now probe Device Identifiers for each device present. */
+	for (i = 1; i < num_ids; i++) {
+		if (!(devs_in_pkg & (1 << i)))
+			continue;
+
+		if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
+			/* Probe the "Device Present" bits for the vendor MMDs
+			 * to ignore these if they do not contain IEEE 802.3
+			 * registers.
+			 */
+			ret = phy_c45_probe_present(bus, addr, i);
+			if (ret < 0)
+				return ret;
+
+			if (!ret)
+				continue;
+		}
+
+		phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID1);
+		if (phy_reg < 0)
+			return -EIO;
+		c45_ids->device_ids[i] = phy_reg << 16;
+
+		phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID2);
+		if (phy_reg < 0)
+			return -EIO;
+		c45_ids->device_ids[i] |= phy_reg;
+	}
+
+	c45_ids->devices_in_package = devs_in_pkg;
+	/* Bit 0 doesn't represent a device, it indicates c22 regs presence */
+	c45_ids->mmds_present = devs_in_pkg & ~BIT(0);
+
+	return 0;
+}
+
+/**
+ * get_phy_c22_id - reads the specified addr for its clause 22 ID.
+ * @bus: the target MII bus
+ * @addr: PHY address on the MII bus
+ * @phy_id: where to store the ID retrieved.
+ *
+ * Read the 802.3 clause 22 PHY ID from the PHY at @addr on the @bus,
+ * placing it in @phy_id. Return zero on successful read and the ID is
+ * valid, %-EIO on bus access error, or %-ENODEV if no device responds
+ * or invalid ID.
+ */
+static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id)
+{
+	int phy_reg;
+
+	/* Grab the bits from PHYIR1, and put them in the upper half */
+	phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
+	if (phy_reg < 0) {
+		/* returning -ENODEV doesn't stop bus scanning */
+		return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
+	}
+
+	*phy_id = phy_reg << 16;
+
+	/* Grab the bits from PHYIR2, and put them in the lower half */
+	phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
+	if (phy_reg < 0) {
+		/* returning -ENODEV doesn't stop bus scanning */
+		return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
+	}
+
+	*phy_id |= phy_reg;
+
+	/* If the phy_id is mostly Fs, there is no device there */
+	if ((*phy_id & 0x1fffffff) == 0x1fffffff)
+		return -ENODEV;
+
+	return 0;
+}
+
+/* Extract the phy ID from the compatible string of the form
+ * ethernet-phy-idAAAA.BBBB.
+ */
+int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id)
+{
+	unsigned int upper, lower;
+	const char *cp;
+	int ret;
+
+	ret = fwnode_property_read_string(fwnode, "compatible", &cp);
+	if (ret)
+		return ret;
+
+	if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) != 2)
+		return -EINVAL;
+
+	*phy_id = ((upper & GENMASK(15, 0)) << 16) | (lower & GENMASK(15, 0));
+	return 0;
+}
+EXPORT_SYMBOL(fwnode_get_phy_id);
+
+/**
+ * get_phy_device - reads the specified PHY device and returns its @phy_device
+ *		    struct
+ * @bus: the target MII bus
+ * @addr: PHY address on the MII bus
+ * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
+ *
+ * Probe for a PHY at @addr on @bus.
+ *
+ * When probing for a clause 22 PHY, then read the ID registers. If we find
+ * a valid ID, allocate and return a &struct phy_device.
+ *
+ * When probing for a clause 45 PHY, read the "devices in package" registers.
+ * If the "devices in package" appears valid, read the ID registers for each
+ * MMD, allocate and return a &struct phy_device.
+ *
+ * Returns an allocated &struct phy_device on success, %-ENODEV if there is
+ * no PHY present, or %-EIO on bus access error.
+ */
+struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
+{
+	struct phy_c45_device_ids c45_ids;
+	u32 phy_id = 0;
+	int r;
+
+	c45_ids.devices_in_package = 0;
+	c45_ids.mmds_present = 0;
+	memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids));
+
+	if (is_c45)
+		r = get_phy_c45_ids(bus, addr, &c45_ids);
+	else
+		r = get_phy_c22_id(bus, addr, &phy_id);
+
+	if (r)
+		return ERR_PTR(r);
+
+	/* PHY device such as the Marvell Alaska 88E2110 will return a PHY ID
+	 * of 0 when probed using get_phy_c22_id() with no error. Proceed to
+	 * probe with C45 to see if we're able to get a valid PHY ID in the C45
+	 * space, if successful, create the C45 PHY device.
+	 */
+	if (!is_c45 && phy_id == 0 && bus->read_c45) {
+		r = get_phy_c45_ids(bus, addr, &c45_ids);
+		if (!r)
+			return phy_device_create(bus, addr, phy_id,
+						 true, &c45_ids);
+	}
+
+	return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
+}
+EXPORT_SYMBOL(get_phy_device);
+
+/**
+ * phy_device_register - Register the phy device on the MDIO bus
+ * @phydev: phy_device structure to be added to the MDIO bus
+ */
+int phy_device_register(struct phy_device *phydev)
+{
+	int err;
+
+	err = mdiobus_register_device(&phydev->mdio);
+	if (err)
+		return err;
+
+	/* Deassert the reset signal */
+	phy_device_reset(phydev, 0);
+
+	/* Run all of the fixups for this PHY */
+	err = phy_scan_fixups(phydev);
+	if (err) {
+		phydev_err(phydev, "failed to initialize\n");
+		goto out;
+	}
+
+	err = device_add(&phydev->mdio.dev);
+	if (err) {
+		phydev_err(phydev, "failed to add\n");
+		goto out;
+	}
+
+	return 0;
+
+ out:
+	/* Assert the reset signal */
+	phy_device_reset(phydev, 1);
+
+	mdiobus_unregister_device(&phydev->mdio);
+	return err;
+}
+EXPORT_SYMBOL(phy_device_register);
+
+/**
+ * phy_device_remove - Remove a previously registered phy device from the MDIO bus
+ * @phydev: phy_device structure to remove
+ *
+ * This doesn't free the phy_device itself, it merely reverses the effects
+ * of phy_device_register(). Use phy_device_free() to free the device
+ * after calling this function.
+ */
+void phy_device_remove(struct phy_device *phydev)
+{
+	unregister_mii_timestamper(phydev->mii_ts);
+	pse_control_put(phydev->psec);
+
+	device_del(&phydev->mdio.dev);
+
+	/* Assert the reset signal */
+	phy_device_reset(phydev, 1);
+
+	mdiobus_unregister_device(&phydev->mdio);
+}
+EXPORT_SYMBOL(phy_device_remove);
+
+/**
+ * phy_get_c45_ids - Read 802.3-c45 IDs for phy device.
+ * @phydev: phy_device structure to read 802.3-c45 IDs
+ *
+ * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
+ * the "devices in package" is invalid.
+ */
+int phy_get_c45_ids(struct phy_device *phydev)
+{
+	return get_phy_c45_ids(phydev->mdio.bus, phydev->mdio.addr,
+			       &phydev->c45_ids);
+}
+EXPORT_SYMBOL(phy_get_c45_ids);
+
+/**
+ * phy_find_first - finds the first PHY device on the bus
+ * @bus: the target MII bus
+ */
+struct phy_device *phy_find_first(struct mii_bus *bus)
+{
+	struct phy_device *phydev;
+	int addr;
+
+	for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
+		phydev = mdiobus_get_phy(bus, addr);
+		if (phydev)
+			return phydev;
+	}
+	return NULL;
+}
+EXPORT_SYMBOL(phy_find_first);
+
+static void phy_link_change(struct phy_device *phydev, bool up)
+{
+	struct net_device *netdev = phydev->attached_dev;
+
+	if (up)
+		netif_carrier_on(netdev);
+	else
+		netif_carrier_off(netdev);
+	phydev->adjust_link(netdev);
+	if (phydev->mii_ts && phydev->mii_ts->link_state)
+		phydev->mii_ts->link_state(phydev->mii_ts, phydev);
+}
+
+/**
+ * phy_prepare_link - prepares the PHY layer to monitor link status
+ * @phydev: target phy_device struct
+ * @handler: callback function for link status change notifications
+ *
+ * Description: Tells the PHY infrastructure to handle the
+ *   gory details on monitoring link status (whether through
+ *   polling or an interrupt), and to call back to the
+ *   connected device driver when the link status changes.
+ *   If you want to monitor your own link state, don't call
+ *   this function.
+ */
+static void phy_prepare_link(struct phy_device *phydev,
+			     void (*handler)(struct net_device *))
+{
+	phydev->adjust_link = handler;
+}
+
+/**
+ * phy_connect_direct - connect an ethernet device to a specific phy_device
+ * @dev: the network device to connect
+ * @phydev: the pointer to the phy device
+ * @handler: callback function for state change notifications
+ * @interface: PHY device's interface
+ */
+int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
+		       void (*handler)(struct net_device *),
+		       phy_interface_t interface)
+{
+	int rc;
+
+	if (!dev)
+		return -EINVAL;
+
+	rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
+	if (rc)
+		return rc;
+
+	phy_prepare_link(phydev, handler);
+	if (phy_interrupt_is_valid(phydev))
+		phy_request_interrupt(phydev);
+
+	return 0;
+}
+EXPORT_SYMBOL(phy_connect_direct);
+
+/**
+ * phy_connect - connect an ethernet device to a PHY device
+ * @dev: the network device to connect
+ * @bus_id: the id string of the PHY device to connect
+ * @handler: callback function for state change notifications
+ * @interface: PHY device's interface
+ *
+ * Description: Convenience function for connecting ethernet
+ *   devices to PHY devices.  The default behavior is for
+ *   the PHY infrastructure to handle everything, and only notify
+ *   the connected driver when the link status changes.  If you
+ *   don't want, or can't use the provided functionality, you may
+ *   choose to call only the subset of functions which provide
+ *   the desired functionality.
+ */
+struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
+			       void (*handler)(struct net_device *),
+			       phy_interface_t interface)
+{
+	struct phy_device *phydev;
+	struct device *d;
+	int rc;
+
+	/* Search the list of PHY devices on the mdio bus for the
+	 * PHY with the requested name
+	 */
+	d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
+	if (!d) {
+		pr_err("PHY %s not found\n", bus_id);
+		return ERR_PTR(-ENODEV);
+	}
+	phydev = to_phy_device(d);
+
+	rc = phy_connect_direct(dev, phydev, handler, interface);
+	put_device(d);
+	if (rc)
+		return ERR_PTR(rc);
+
+	return phydev;
+}
+EXPORT_SYMBOL(phy_connect);
+
+/**
+ * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
+ *		    device
+ * @phydev: target phy_device struct
+ */
+void phy_disconnect(struct phy_device *phydev)
+{
+	if (phy_is_started(phydev))
+		phy_stop(phydev);
+
+	if (phy_interrupt_is_valid(phydev))
+		phy_free_interrupt(phydev);
+
+	phydev->adjust_link = NULL;
+
+	phy_detach(phydev);
+}
+EXPORT_SYMBOL(phy_disconnect);
+
+/**
+ * phy_poll_reset - Safely wait until a PHY reset has properly completed
+ * @phydev: The PHY device to poll
+ *
+ * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
+ *   published in 2008, a PHY reset may take up to 0.5 seconds.  The MII BMCR
+ *   register must be polled until the BMCR_RESET bit clears.
+ *
+ *   Furthermore, any attempts to write to PHY registers may have no effect
+ *   or even generate MDIO bus errors until this is complete.
+ *
+ *   Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
+ *   standard and do not fully reset after the BMCR_RESET bit is set, and may
+ *   even *REQUIRE* a soft-reset to properly restart autonegotiation.  In an
+ *   effort to support such broken PHYs, this function is separate from the
+ *   standard phy_init_hw() which will zero all the other bits in the BMCR
+ *   and reapply all driver-specific and board-specific fixups.
+ */
+static int phy_poll_reset(struct phy_device *phydev)
+{
+	/* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
+	int ret, val;
+
+	ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET),
+				    50000, 600000, true);
+	if (ret)
+		return ret;
+	/* Some chips (smsc911x) may still need up to another 1ms after the
+	 * BMCR_RESET bit is cleared before they are usable.
+	 */
+	msleep(1);
+	return 0;
+}
+
+int phy_init_hw(struct phy_device *phydev)
+{
+	int ret = 0;
+
+	/* Deassert the reset signal */
+	phy_device_reset(phydev, 0);
+
+	if (!phydev->drv)
+		return 0;
+
+	if (phydev->drv->soft_reset) {
+		ret = phydev->drv->soft_reset(phydev);
+		/* see comment in genphy_soft_reset for an explanation */
+		if (!ret)
+			phydev->suspended = 0;
+	}
+
+	if (ret < 0)
+		return ret;
+
+	ret = phy_scan_fixups(phydev);
+	if (ret < 0)
+		return ret;
+
+	if (phydev->drv->config_init) {
+		ret = phydev->drv->config_init(phydev);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (phydev->drv->config_intr) {
+		ret = phydev->drv->config_intr(phydev);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(phy_init_hw);
+
+void phy_attached_info(struct phy_device *phydev)
+{
+	phy_attached_print(phydev, NULL);
+}
+EXPORT_SYMBOL(phy_attached_info);
+
+#define ATTACHED_FMT "attached PHY driver %s(mii_bus:phy_addr=%s, irq=%s)"
+char *phy_attached_info_irq(struct phy_device *phydev)
+{
+	char *irq_str;
+	char irq_num[8];
+
+	switch(phydev->irq) {
+	case PHY_POLL:
+		irq_str = "POLL";
+		break;
+	case PHY_MAC_INTERRUPT:
+		irq_str = "MAC";
+		break;
+	default:
+		snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
+		irq_str = irq_num;
+		break;
+	}
+
+	return kasprintf(GFP_KERNEL, "%s", irq_str);
+}
+EXPORT_SYMBOL(phy_attached_info_irq);
+
+void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
+{
+	const char *unbound = phydev->drv ? "" : "[unbound] ";
+	char *irq_str = phy_attached_info_irq(phydev);
+
+	if (!fmt) {
+		phydev_info(phydev, ATTACHED_FMT "\n", unbound,
+			    phydev_name(phydev), irq_str);
+	} else {
+		va_list ap;
+
+		phydev_info(phydev, ATTACHED_FMT, unbound,
+			    phydev_name(phydev), irq_str);
+
+		va_start(ap, fmt);
+		vprintk(fmt, ap);
+		va_end(ap);
+	}
+	kfree(irq_str);
+}
+EXPORT_SYMBOL(phy_attached_print);
+
+static void phy_sysfs_create_links(struct phy_device *phydev)
+{
+	struct net_device *dev = phydev->attached_dev;
+	int err;
+
+	if (!dev)
+		return;
+
+	err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
+				"attached_dev");
+	if (err)
+		return;
+
+	err = sysfs_create_link_nowarn(&dev->dev.kobj,
+				       &phydev->mdio.dev.kobj,
+				       "phydev");
+	if (err) {
+		dev_err(&dev->dev, "could not add device link to %s err %d\n",
+			kobject_name(&phydev->mdio.dev.kobj),
+			err);
+		/* non-fatal - some net drivers can use one netdevice
+		 * with more then one phy
+		 */
+	}
+
+	phydev->sysfs_links = true;
+}
+
+static ssize_t
+phy_standalone_show(struct device *dev, struct device_attribute *attr,
+		    char *buf)
+{
+	struct phy_device *phydev = to_phy_device(dev);
+
+	return sysfs_emit(buf, "%d\n", !phydev->attached_dev);
+}
+static DEVICE_ATTR_RO(phy_standalone);
+
+/**
+ * phy_sfp_attach - attach the SFP bus to the PHY upstream network device
+ * @upstream: pointer to the phy device
+ * @bus: sfp bus representing cage being attached
+ *
+ * This is used to fill in the sfp_upstream_ops .attach member.
+ */
+void phy_sfp_attach(void *upstream, struct sfp_bus *bus)
+{
+	struct phy_device *phydev = upstream;
+
+	if (phydev->attached_dev)
+		phydev->attached_dev->sfp_bus = bus;
+	phydev->sfp_bus_attached = true;
+}
+EXPORT_SYMBOL(phy_sfp_attach);
+
+/**
+ * phy_sfp_detach - detach the SFP bus from the PHY upstream network device
+ * @upstream: pointer to the phy device
+ * @bus: sfp bus representing cage being attached
+ *
+ * This is used to fill in the sfp_upstream_ops .detach member.
+ */
+void phy_sfp_detach(void *upstream, struct sfp_bus *bus)
+{
+	struct phy_device *phydev = upstream;
+
+	if (phydev->attached_dev)
+		phydev->attached_dev->sfp_bus = NULL;
+	phydev->sfp_bus_attached = false;
+}
+EXPORT_SYMBOL(phy_sfp_detach);
+
+/**
+ * phy_sfp_probe - probe for a SFP cage attached to this PHY device
+ * @phydev: Pointer to phy_device
+ * @ops: SFP's upstream operations
+ */
+int phy_sfp_probe(struct phy_device *phydev,
+		  const struct sfp_upstream_ops *ops)
+{
+	struct sfp_bus *bus;
+	int ret = 0;
+
+	if (phydev->mdio.dev.fwnode) {
+		bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode);
+		if (IS_ERR(bus))
+			return PTR_ERR(bus);
+
+		phydev->sfp_bus = bus;
+
+		ret = sfp_bus_add_upstream(bus, phydev, ops);
+		sfp_bus_put(bus);
+	}
+	return ret;
+}
+EXPORT_SYMBOL(phy_sfp_probe);
+
+/**
+ * phy_attach_direct - attach a network device to a given PHY device pointer
+ * @dev: network device to attach
+ * @phydev: Pointer to phy_device to attach
+ * @flags: PHY device's dev_flags
+ * @interface: PHY device's interface
+ *
+ * Description: Called by drivers to attach to a particular PHY
+ *     device. The phy_device is found, and properly hooked up
+ *     to the phy_driver.  If no driver is attached, then a
+ *     generic driver is used.  The phy_device is given a ptr to
+ *     the attaching device, and given a callback for link status
+ *     change.  The phy_device is returned to the attaching driver.
+ *     This function takes a reference on the phy device.
+ */
+int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
+		      u32 flags, phy_interface_t interface)
+{
+	struct mii_bus *bus = phydev->mdio.bus;
+	struct device *d = &phydev->mdio.dev;
+	struct module *ndev_owner = NULL;
+	bool using_genphy = false;
+	int err;
+
+	/* For Ethernet device drivers that register their own MDIO bus, we
+	 * will have bus->owner match ndev_mod, so we do not want to increment
+	 * our own module->refcnt here, otherwise we would not be able to
+	 * unload later on.
+	 */
+	if (dev)
+		ndev_owner = dev->dev.parent->driver->owner;
+	if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
+		phydev_err(phydev, "failed to get the bus module\n");
+		return -EIO;
+	}
+
+	get_device(d);
+
+	/* Assume that if there is no driver, that it doesn't
+	 * exist, and we should use the genphy driver.
+	 */
+	if (!d->driver) {
+		if (phydev->is_c45)
+			d->driver = &genphy_c45_driver.mdiodrv.driver;
+		else
+			d->driver = &genphy_driver.mdiodrv.driver;
+
+		using_genphy = true;
+	}
+
+	if (!try_module_get(d->driver->owner)) {
+		phydev_err(phydev, "failed to get the device driver module\n");
+		err = -EIO;
+		goto error_put_device;
+	}
+
+	if (using_genphy) {
+		err = d->driver->probe(d);
+		if (err >= 0)
+			err = device_bind_driver(d);
+
+		if (err)
+			goto error_module_put;
+	}
+
+	if (phydev->attached_dev) {
+		dev_err(&dev->dev, "PHY already attached\n");
+		err = -EBUSY;
+		goto error;
+	}
+
+	phydev->phy_link_change = phy_link_change;
+	if (dev) {
+		phydev->attached_dev = dev;
+		dev->phydev = phydev;
+
+		if (phydev->sfp_bus_attached)
+			dev->sfp_bus = phydev->sfp_bus;
+	}
+
+	/* Some Ethernet drivers try to connect to a PHY device before
+	 * calling register_netdevice() -> netdev_register_kobject() and
+	 * does the dev->dev.kobj initialization. Here we only check for
+	 * success which indicates that the network device kobject is
+	 * ready. Once we do that we still need to keep track of whether
+	 * links were successfully set up or not for phy_detach() to
+	 * remove them accordingly.
+	 */
+	phydev->sysfs_links = false;
+
+	phy_sysfs_create_links(phydev);
+
+	if (!phydev->attached_dev) {
+		err = sysfs_create_file(&phydev->mdio.dev.kobj,
+					&dev_attr_phy_standalone.attr);
+		if (err)
+			phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n");
+	}
+
+	phydev->dev_flags |= flags;
+
+	phydev->interface = interface;
+
+	phydev->state = PHY_READY;
+
+	phydev->interrupts = PHY_INTERRUPT_DISABLED;
+
+	/* PHYs can request to use poll mode even though they have an
+	 * associated interrupt line. This could be the case if they
+	 * detect a broken interrupt handling.
+	 */
+	if (phydev->dev_flags & PHY_F_NO_IRQ)
+		phydev->irq = PHY_POLL;
+
+	/* Port is set to PORT_TP by default and the actual PHY driver will set
+	 * it to different value depending on the PHY configuration. If we have
+	 * the generic PHY driver we can't figure it out, thus set the old
+	 * legacy PORT_MII value.
+	 */
+	if (using_genphy)
+		phydev->port = PORT_MII;
+
+	/* Initial carrier state is off as the phy is about to be
+	 * (re)initialized.
+	 */
+	if (dev)
+		netif_carrier_off(phydev->attached_dev);
+
+	/* Do initial configuration here, now that
+	 * we have certain key parameters
+	 * (dev_flags and interface)
+	 */
+	err = phy_init_hw(phydev);
+	if (err)
+		goto error;
+
+	phy_resume(phydev);
+	if (!phydev->is_on_sfp_module)
+		phy_led_triggers_register(phydev);
+
+	/**
+	 * If the external phy used by current mac interface is managed by
+	 * another mac interface, so we should create a device link between
+	 * phy dev and mac dev.
+	 */
+	if (dev && phydev->mdio.bus->parent && dev->dev.parent != phydev->mdio.bus->parent)
+		phydev->devlink = device_link_add(dev->dev.parent, &phydev->mdio.dev,
+						  DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
+
+	return err;
+
+error:
+	/* phy_detach() does all of the cleanup below */
+	phy_detach(phydev);
+	return err;
+
+error_module_put:
+	module_put(d->driver->owner);
+	d->driver = NULL;
+error_put_device:
+	put_device(d);
+	if (ndev_owner != bus->owner)
+		module_put(bus->owner);
+	return err;
+}
+EXPORT_SYMBOL(phy_attach_direct);
+
+/**
+ * phy_attach - attach a network device to a particular PHY device
+ * @dev: network device to attach
+ * @bus_id: Bus ID of PHY device to attach
+ * @interface: PHY device's interface
+ *
+ * Description: Same as phy_attach_direct() except that a PHY bus_id
+ *     string is passed instead of a pointer to a struct phy_device.
+ */
+struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
+			      phy_interface_t interface)
+{
+	struct bus_type *bus = &mdio_bus_type;
+	struct phy_device *phydev;
+	struct device *d;
+	int rc;
+
+	if (!dev)
+		return ERR_PTR(-EINVAL);
+
+	/* Search the list of PHY devices on the mdio bus for the
+	 * PHY with the requested name
+	 */
+	d = bus_find_device_by_name(bus, NULL, bus_id);
+	if (!d) {
+		pr_err("PHY %s not found\n", bus_id);
+		return ERR_PTR(-ENODEV);
+	}
+	phydev = to_phy_device(d);
+
+	rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
+	put_device(d);
+	if (rc)
+		return ERR_PTR(rc);
+
+	return phydev;
+}
+EXPORT_SYMBOL(phy_attach);
+
+static bool phy_driver_is_genphy_kind(struct phy_device *phydev,
+				      struct device_driver *driver)
+{
+	struct device *d = &phydev->mdio.dev;
+	bool ret = false;
+
+	if (!phydev->drv)
+		return ret;
+
+	get_device(d);
+	ret = d->driver == driver;
+	put_device(d);
+
+	return ret;
+}
+
+bool phy_driver_is_genphy(struct phy_device *phydev)
+{
+	return phy_driver_is_genphy_kind(phydev,
+					 &genphy_driver.mdiodrv.driver);
+}
+EXPORT_SYMBOL_GPL(phy_driver_is_genphy);
+
+bool phy_driver_is_genphy_10g(struct phy_device *phydev)
+{
+	return phy_driver_is_genphy_kind(phydev,
+					 &genphy_c45_driver.mdiodrv.driver);
+}
+EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g);
+
+/**
+ * phy_package_join - join a common PHY group
+ * @phydev: target phy_device struct
+ * @addr: cookie and PHY address for global register access
+ * @priv_size: if non-zero allocate this amount of bytes for private data
+ *
+ * This joins a PHY group and provides a shared storage for all phydevs in
+ * this group. This is intended to be used for packages which contain
+ * more than one PHY, for example a quad PHY transceiver.
+ *
+ * The addr parameter serves as a cookie which has to have the same value
+ * for all members of one group and as a PHY address to access generic
+ * registers of a PHY package. Usually, one of the PHY addresses of the
+ * different PHYs in the package provides access to these global registers.
+ * The address which is given here, will be used in the phy_package_read()
+ * and phy_package_write() convenience functions. If your PHY doesn't have
+ * global registers you can just pick any of the PHY addresses.
+ *
+ * This will set the shared pointer of the phydev to the shared storage.
+ * If this is the first call for a this cookie the shared storage will be
+ * allocated. If priv_size is non-zero, the given amount of bytes are
+ * allocated for the priv member.
+ *
+ * Returns < 1 on error, 0 on success. Esp. calling phy_package_join()
+ * with the same cookie but a different priv_size is an error.
+ */
+int phy_package_join(struct phy_device *phydev, int addr, size_t priv_size)
+{
+	struct mii_bus *bus = phydev->mdio.bus;
+	struct phy_package_shared *shared;
+	int ret;
+
+	if (addr < 0 || addr >= PHY_MAX_ADDR)
+		return -EINVAL;
+
+	mutex_lock(&bus->shared_lock);
+	shared = bus->shared[addr];
+	if (!shared) {
+		ret = -ENOMEM;
+		shared = kzalloc(sizeof(*shared), GFP_KERNEL);
+		if (!shared)
+			goto err_unlock;
+		if (priv_size) {
+			shared->priv = kzalloc(priv_size, GFP_KERNEL);
+			if (!shared->priv)
+				goto err_free;
+			shared->priv_size = priv_size;
+		}
+		shared->addr = addr;
+		refcount_set(&shared->refcnt, 1);
+		bus->shared[addr] = shared;
+	} else {
+		ret = -EINVAL;
+		if (priv_size && priv_size != shared->priv_size)
+			goto err_unlock;
+		refcount_inc(&shared->refcnt);
+	}
+	mutex_unlock(&bus->shared_lock);
+
+	phydev->shared = shared;
+
+	return 0;
+
+err_free:
+	kfree(shared);
+err_unlock:
+	mutex_unlock(&bus->shared_lock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(phy_package_join);
+
+/**
+ * phy_package_leave - leave a common PHY group
+ * @phydev: target phy_device struct
+ *
+ * This leaves a PHY group created by phy_package_join(). If this phydev
+ * was the last user of the shared data between the group, this data is
+ * freed. Resets the phydev->shared pointer to NULL.
+ */
+void phy_package_leave(struct phy_device *phydev)
+{
+	struct phy_package_shared *shared = phydev->shared;
+	struct mii_bus *bus = phydev->mdio.bus;
+
+	if (!shared)
+		return;
+
+	if (refcount_dec_and_mutex_lock(&shared->refcnt, &bus->shared_lock)) {
+		bus->shared[shared->addr] = NULL;
+		mutex_unlock(&bus->shared_lock);
+		kfree(shared->priv);
+		kfree(shared);
+	}
+
+	phydev->shared = NULL;
+}
+EXPORT_SYMBOL_GPL(phy_package_leave);
+
+static void devm_phy_package_leave(struct device *dev, void *res)
+{
+	phy_package_leave(*(struct phy_device **)res);
+}
+
+/**
+ * devm_phy_package_join - resource managed phy_package_join()
+ * @dev: device that is registering this PHY package
+ * @phydev: target phy_device struct
+ * @addr: cookie and PHY address for global register access
+ * @priv_size: if non-zero allocate this amount of bytes for private data
+ *
+ * Managed phy_package_join(). Shared storage fetched by this function,
+ * phy_package_leave() is automatically called on driver detach. See
+ * phy_package_join() for more information.
+ */
+int devm_phy_package_join(struct device *dev, struct phy_device *phydev,
+			  int addr, size_t priv_size)
+{
+	struct phy_device **ptr;
+	int ret;
+
+	ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr),
+			   GFP_KERNEL);
+	if (!ptr)
+		return -ENOMEM;
+
+	ret = phy_package_join(phydev, addr, priv_size);
+
+	if (!ret) {
+		*ptr = phydev;
+		devres_add(dev, ptr);
+	} else {
+		devres_free(ptr);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(devm_phy_package_join);
+
+/**
+ * phy_detach - detach a PHY device from its network device
+ * @phydev: target phy_device struct
+ *
+ * This detaches the phy device from its network device and the phy
+ * driver, and drops the reference count taken in phy_attach_direct().
+ */
+void phy_detach(struct phy_device *phydev)
+{
+	struct net_device *dev = phydev->attached_dev;
+	struct module *ndev_owner = NULL;
+	struct mii_bus *bus;
+
+	if (phydev->devlink)
+		device_link_del(phydev->devlink);
+
+	if (phydev->sysfs_links) {
+		if (dev)
+			sysfs_remove_link(&dev->dev.kobj, "phydev");
+		sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
+	}
+
+	if (!phydev->attached_dev)
+		sysfs_remove_file(&phydev->mdio.dev.kobj,
+				  &dev_attr_phy_standalone.attr);
+
+	phy_suspend(phydev);
+	if (dev) {
+		phydev->attached_dev->phydev = NULL;
+		phydev->attached_dev = NULL;
+	}
+	phydev->phylink = NULL;
+
+	if (!phydev->is_on_sfp_module)
+		phy_led_triggers_unregister(phydev);
+
+	if (phydev->mdio.dev.driver)
+		module_put(phydev->mdio.dev.driver->owner);
+
+	/* If the device had no specific driver before (i.e. - it
+	 * was using the generic driver), we unbind the device
+	 * from the generic driver so that there's a chance a
+	 * real driver could be loaded
+	 */
+	if (phy_driver_is_genphy(phydev) ||
+	    phy_driver_is_genphy_10g(phydev))
+		device_release_driver(&phydev->mdio.dev);
+
+	/* Assert the reset signal */
+	phy_device_reset(phydev, 1);
+
+	/*
+	 * The phydev might go away on the put_device() below, so avoid
+	 * a use-after-free bug by reading the underlying bus first.
+	 */
+	bus = phydev->mdio.bus;
+
+	put_device(&phydev->mdio.dev);
+	if (dev)
+		ndev_owner = dev->dev.parent->driver->owner;
+	if (ndev_owner != bus->owner)
+		module_put(bus->owner);
+}
+EXPORT_SYMBOL(phy_detach);
+
+int phy_suspend(struct phy_device *phydev)
+{
+	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
+	struct net_device *netdev = phydev->attached_dev;
+	struct phy_driver *phydrv = phydev->drv;
+	int ret;
+
+	if (phydev->suspended)
+		return 0;
+
+	phy_ethtool_get_wol(phydev, &wol);
+	phydev->wol_enabled = wol.wolopts || (netdev && netdev->wol_enabled);
+	/* If the device has WOL enabled, we cannot suspend the PHY */
+	if (phydev->wol_enabled && !(phydrv->flags & PHY_ALWAYS_CALL_SUSPEND))
+		return -EBUSY;
+
+	if (!phydrv || !phydrv->suspend)
+		return 0;
+
+	ret = phydrv->suspend(phydev);
+	if (!ret)
+		phydev->suspended = true;
+
+	return ret;
+}
+EXPORT_SYMBOL(phy_suspend);
+
+int __phy_resume(struct phy_device *phydev)
+{
+	struct phy_driver *phydrv = phydev->drv;
+	int ret;
+
+	lockdep_assert_held(&phydev->lock);
+
+	if (!phydrv || !phydrv->resume)
+		return 0;
+
+	ret = phydrv->resume(phydev);
+	if (!ret)
+		phydev->suspended = false;
+
+	return ret;
+}
+EXPORT_SYMBOL(__phy_resume);
+
+int phy_resume(struct phy_device *phydev)
+{
+	int ret;
+
+	mutex_lock(&phydev->lock);
+	ret = __phy_resume(phydev);
+	mutex_unlock(&phydev->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL(phy_resume);
+
+int phy_loopback(struct phy_device *phydev, bool enable)
+{
+	int ret = 0;
+
+	if (!phydev->drv)
+		return -EIO;
+
+	mutex_lock(&phydev->lock);
+
+	if (enable && phydev->loopback_enabled) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	if (!enable && !phydev->loopback_enabled) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (phydev->drv->set_loopback)
+		ret = phydev->drv->set_loopback(phydev, enable);
+	else
+		ret = genphy_loopback(phydev, enable);
+
+	if (ret)
+		goto out;
+
+	phydev->loopback_enabled = enable;
+
+out:
+	mutex_unlock(&phydev->lock);
+	return ret;
+}
+EXPORT_SYMBOL(phy_loopback);
+
+/**
+ * phy_reset_after_clk_enable - perform a PHY reset if needed
+ * @phydev: target phy_device struct
+ *
+ * Description: Some PHYs are known to need a reset after their refclk was
+ *   enabled. This function evaluates the flags and perform the reset if it's
+ *   needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
+ *   was reset.
+ */
+int phy_reset_after_clk_enable(struct phy_device *phydev)
+{
+	if (!phydev || !phydev->drv)
+		return -ENODEV;
+
+	if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) {
+		phy_device_reset(phydev, 1);
+		phy_device_reset(phydev, 0);
+		return 1;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(phy_reset_after_clk_enable);
+
+/* Generic PHY support and helper functions */
+
+/**
+ * genphy_config_advert - sanitize and advertise auto-negotiation parameters
+ * @phydev: target phy_device struct
+ *
+ * Description: Writes MII_ADVERTISE with the appropriate values,
+ *   after sanitizing the values to make sure we only advertise
+ *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
+ *   hasn't changed, and > 0 if it has changed.
+ */
+static int genphy_config_advert(struct phy_device *phydev)
+{
+	int err, bmsr, changed = 0;
+	u32 adv;
+
+	/* Only allow advertising what this PHY supports */
+	linkmode_and(phydev->advertising, phydev->advertising,
+		     phydev->supported);
+
+	adv = linkmode_adv_to_mii_adv_t(phydev->advertising);
+
+	/* Setup standard advertisement */
+	err = phy_modify_changed(phydev, MII_ADVERTISE,
+				 ADVERTISE_ALL | ADVERTISE_100BASE4 |
+				 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
+				 adv);
+	if (err < 0)
+		return err;
+	if (err > 0)
+		changed = 1;
+
+	bmsr = phy_read(phydev, MII_BMSR);
+	if (bmsr < 0)
+		return bmsr;
+
+	/* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
+	 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
+	 * logical 1.
+	 */
+	if (!(bmsr & BMSR_ESTATEN))
+		return changed;
+
+	adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising);
+
+	err = phy_modify_changed(phydev, MII_CTRL1000,
+				 ADVERTISE_1000FULL | ADVERTISE_1000HALF,
+				 adv);
+	if (err < 0)
+		return err;
+	if (err > 0)
+		changed = 1;
+
+	return changed;
+}
+
+/**
+ * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters
+ * @phydev: target phy_device struct
+ *
+ * Description: Writes MII_ADVERTISE with the appropriate values,
+ *   after sanitizing the values to make sure we only advertise
+ *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
+ *   hasn't changed, and > 0 if it has changed. This function is intended
+ *   for Clause 37 1000Base-X mode.
+ */
+static int genphy_c37_config_advert(struct phy_device *phydev)
+{
+	u16 adv = 0;
+
+	/* Only allow advertising what this PHY supports */
+	linkmode_and(phydev->advertising, phydev->advertising,
+		     phydev->supported);
+
+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
+			      phydev->advertising))
+		adv |= ADVERTISE_1000XFULL;
+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+			      phydev->advertising))
+		adv |= ADVERTISE_1000XPAUSE;
+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+			      phydev->advertising))
+		adv |= ADVERTISE_1000XPSE_ASYM;
+
+	return phy_modify_changed(phydev, MII_ADVERTISE,
+				  ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
+				  ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM,
+				  adv);
+}
+
+/**
+ * genphy_config_eee_advert - disable unwanted eee mode advertisement
+ * @phydev: target phy_device struct
+ *
+ * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
+ *   efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
+ *   changed, and 1 if it has changed.
+ */
+int genphy_config_eee_advert(struct phy_device *phydev)
+{
+	int err;
+
+	/* Nothing to disable */
+	if (!phydev->eee_broken_modes)
+		return 0;
+
+	err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV,
+				     phydev->eee_broken_modes, 0);
+	/* If the call failed, we assume that EEE is not supported */
+	return err < 0 ? 0 : err;
+}
+EXPORT_SYMBOL(genphy_config_eee_advert);
+
+/**
+ * genphy_setup_forced - configures/forces speed/duplex from @phydev
+ * @phydev: target phy_device struct
+ *
+ * Description: Configures MII_BMCR to force speed/duplex
+ *   to the values in phydev. Assumes that the values are valid.
+ *   Please see phy_sanitize_settings().
+ */
+int genphy_setup_forced(struct phy_device *phydev)
+{
+	u16 ctl;
+
+	phydev->pause = 0;
+	phydev->asym_pause = 0;
+
+	ctl = mii_bmcr_encode_fixed(phydev->speed, phydev->duplex);
+
+	return phy_modify(phydev, MII_BMCR,
+			  ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
+}
+EXPORT_SYMBOL(genphy_setup_forced);
+
+static int genphy_setup_master_slave(struct phy_device *phydev)
+{
+	u16 ctl = 0;
+
+	if (!phydev->is_gigabit_capable)
+		return 0;
+
+	switch (phydev->master_slave_set) {
+	case MASTER_SLAVE_CFG_MASTER_PREFERRED:
+		ctl |= CTL1000_PREFER_MASTER;
+		break;
+	case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
+		break;
+	case MASTER_SLAVE_CFG_MASTER_FORCE:
+		ctl |= CTL1000_AS_MASTER;
+		fallthrough;
+	case MASTER_SLAVE_CFG_SLAVE_FORCE:
+		ctl |= CTL1000_ENABLE_MASTER;
+		break;
+	case MASTER_SLAVE_CFG_UNKNOWN:
+	case MASTER_SLAVE_CFG_UNSUPPORTED:
+		return 0;
+	default:
+		phydev_warn(phydev, "Unsupported Master/Slave mode\n");
+		return -EOPNOTSUPP;
+	}
+
+	return phy_modify_changed(phydev, MII_CTRL1000,
+				  (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER |
+				   CTL1000_PREFER_MASTER), ctl);
+}
+
+int genphy_read_master_slave(struct phy_device *phydev)
+{
+	int cfg, state;
+	int val;
+
+	phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
+	phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
+
+	val = phy_read(phydev, MII_CTRL1000);
+	if (val < 0)
+		return val;
+
+	if (val & CTL1000_ENABLE_MASTER) {
+		if (val & CTL1000_AS_MASTER)
+			cfg = MASTER_SLAVE_CFG_MASTER_FORCE;
+		else
+			cfg = MASTER_SLAVE_CFG_SLAVE_FORCE;
+	} else {
+		if (val & CTL1000_PREFER_MASTER)
+			cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED;
+		else
+			cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED;
+	}
+
+	val = phy_read(phydev, MII_STAT1000);
+	if (val < 0)
+		return val;
+
+	if (val & LPA_1000MSFAIL) {
+		state = MASTER_SLAVE_STATE_ERR;
+	} else if (phydev->link) {
+		/* this bits are valid only for active link */
+		if (val & LPA_1000MSRES)
+			state = MASTER_SLAVE_STATE_MASTER;
+		else
+			state = MASTER_SLAVE_STATE_SLAVE;
+	} else {
+		state = MASTER_SLAVE_STATE_UNKNOWN;
+	}
+
+	phydev->master_slave_get = cfg;
+	phydev->master_slave_state = state;
+
+	return 0;
+}
+EXPORT_SYMBOL(genphy_read_master_slave);
+
+/**
+ * genphy_restart_aneg - Enable and Restart Autonegotiation
+ * @phydev: target phy_device struct
+ */
+int genphy_restart_aneg(struct phy_device *phydev)
+{
+	/* Don't isolate the PHY if we're negotiating */
+	return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE,
+			  BMCR_ANENABLE | BMCR_ANRESTART);
+}
+EXPORT_SYMBOL(genphy_restart_aneg);
+
+/**
+ * genphy_check_and_restart_aneg - Enable and restart auto-negotiation
+ * @phydev: target phy_device struct
+ * @restart: whether aneg restart is requested
+ *
+ * Check, and restart auto-negotiation if needed.
+ */
+int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart)
+{
+	int ret;
+
+	if (!restart) {
+		/* Advertisement hasn't changed, but maybe aneg was never on to
+		 * begin with?  Or maybe phy was isolated?
+		 */
+		ret = phy_read(phydev, MII_BMCR);
+		if (ret < 0)
+			return ret;
+
+		if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE))
+			restart = true;
+	}
+
+	if (restart)
+		return genphy_restart_aneg(phydev);
+
+	return 0;
+}
+EXPORT_SYMBOL(genphy_check_and_restart_aneg);
+
+/**
+ * __genphy_config_aneg - restart auto-negotiation or write BMCR
+ * @phydev: target phy_device struct
+ * @changed: whether autoneg is requested
+ *
+ * Description: If auto-negotiation is enabled, we configure the
+ *   advertising, and then restart auto-negotiation.  If it is not
+ *   enabled, then we write the BMCR.
+ */
+int __genphy_config_aneg(struct phy_device *phydev, bool changed)
+{
+	int err;
+
+	err = genphy_c45_an_config_eee_aneg(phydev);
+	if (err < 0)
+		return err;
+	else if (err)
+		changed = true;
+
+	err = genphy_setup_master_slave(phydev);
+	if (err < 0)
+		return err;
+	else if (err)
+		changed = true;
+
+	if (AUTONEG_ENABLE != phydev->autoneg)
+		return genphy_setup_forced(phydev);
+
+	err = genphy_config_advert(phydev);
+	if (err < 0) /* error */
+		return err;
+	else if (err)
+		changed = true;
+
+	return genphy_check_and_restart_aneg(phydev, changed);
+}
+EXPORT_SYMBOL(__genphy_config_aneg);
+
+/**
+ * genphy_c37_config_aneg - restart auto-negotiation or write BMCR
+ * @phydev: target phy_device struct
+ *
+ * Description: If auto-negotiation is enabled, we configure the
+ *   advertising, and then restart auto-negotiation.  If it is not
+ *   enabled, then we write the BMCR. This function is intended
+ *   for use with Clause 37 1000Base-X mode.
+ */
+int genphy_c37_config_aneg(struct phy_device *phydev)
+{
+	int err, changed;
+
+	if (phydev->autoneg != AUTONEG_ENABLE)
+		return genphy_setup_forced(phydev);
+
+	err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100,
+			 BMCR_SPEED1000);
+	if (err)
+		return err;
+
+	changed = genphy_c37_config_advert(phydev);
+	if (changed < 0) /* error */
+		return changed;
+
+	if (!changed) {
+		/* Advertisement hasn't changed, but maybe aneg was never on to
+		 * begin with?  Or maybe phy was isolated?
+		 */
+		int ctl = phy_read(phydev, MII_BMCR);
+
+		if (ctl < 0)
+			return ctl;
+
+		if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
+			changed = 1; /* do restart aneg */
+	}
+
+	/* Only restart aneg if we are advertising something different
+	 * than we were before.
+	 */
+	if (changed > 0)
+		return genphy_restart_aneg(phydev);
+
+	return 0;
+}
+EXPORT_SYMBOL(genphy_c37_config_aneg);
+
+/**
+ * genphy_aneg_done - return auto-negotiation status
+ * @phydev: target phy_device struct
+ *
+ * Description: Reads the status register and returns 0 either if
+ *   auto-negotiation is incomplete, or if there was an error.
+ *   Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
+ */
+int genphy_aneg_done(struct phy_device *phydev)
+{
+	int retval = phy_read(phydev, MII_BMSR);
+
+	return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
+}
+EXPORT_SYMBOL(genphy_aneg_done);
+
+/**
+ * genphy_update_link - update link status in @phydev
+ * @phydev: target phy_device struct
+ *
+ * Description: Update the value in phydev->link to reflect the
+ *   current link value.  In order to do this, we need to read
+ *   the status register twice, keeping the second value.
+ */
+int genphy_update_link(struct phy_device *phydev)
+{
+	int status = 0, bmcr;
+
+	bmcr = phy_read(phydev, MII_BMCR);
+	if (bmcr < 0)
+		return bmcr;
+
+	/* Autoneg is being started, therefore disregard BMSR value and
+	 * report link as down.
+	 */
+	if (bmcr & BMCR_ANRESTART)
+		goto done;
+
+	/* The link state is latched low so that momentary link
+	 * drops can be detected. Do not double-read the status
+	 * in polling mode to detect such short link drops except
+	 * the link was already down.
+	 */
+	if (!phy_polling_mode(phydev) || !phydev->link) {
+		status = phy_read(phydev, MII_BMSR);
+		if (status < 0)
+			return status;
+		else if (status & BMSR_LSTATUS)
+			goto done;
+	}
+
+	/* Read link and autonegotiation status */
+	status = phy_read(phydev, MII_BMSR);
+	if (status < 0)
+		return status;
+done:
+	phydev->link = status & BMSR_LSTATUS ? 1 : 0;
+	phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0;
+
+	/* Consider the case that autoneg was started and "aneg complete"
+	 * bit has been reset, but "link up" bit not yet.
+	 */
+	if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete)
+		phydev->link = 0;
+
+	return 0;
+}
+EXPORT_SYMBOL(genphy_update_link);
+
+int genphy_read_lpa(struct phy_device *phydev)
+{
+	int lpa, lpagb;
+
+	if (phydev->autoneg == AUTONEG_ENABLE) {
+		if (!phydev->autoneg_complete) {
+			mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
+							0);
+			mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
+			return 0;
+		}
+
+		if (phydev->is_gigabit_capable) {
+			lpagb = phy_read(phydev, MII_STAT1000);
+			if (lpagb < 0)
+				return lpagb;
+
+			if (lpagb & LPA_1000MSFAIL) {
+				int adv = phy_read(phydev, MII_CTRL1000);
+
+				if (adv < 0)
+					return adv;
+
+				if (adv & CTL1000_ENABLE_MASTER)
+					phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n");
+				else
+					phydev_err(phydev, "Master/Slave resolution failed\n");
+				return -ENOLINK;
+			}
+
+			mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
+							lpagb);
+		}
+
+		lpa = phy_read(phydev, MII_LPA);
+		if (lpa < 0)
+			return lpa;
+
+		mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa);
+	} else {
+		linkmode_zero(phydev->lp_advertising);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(genphy_read_lpa);
+
+/**
+ * genphy_read_status_fixed - read the link parameters for !aneg mode
+ * @phydev: target phy_device struct
+ *
+ * Read the current duplex and speed state for a PHY operating with
+ * autonegotiation disabled.
+ */
+int genphy_read_status_fixed(struct phy_device *phydev)
+{
+	int bmcr = phy_read(phydev, MII_BMCR);
+
+	if (bmcr < 0)
+		return bmcr;
+
+	if (bmcr & BMCR_FULLDPLX)
+		phydev->duplex = DUPLEX_FULL;
+	else
+		phydev->duplex = DUPLEX_HALF;
+
+	if (bmcr & BMCR_SPEED1000)
+		phydev->speed = SPEED_1000;
+	else if (bmcr & BMCR_SPEED100)
+		phydev->speed = SPEED_100;
+	else
+		phydev->speed = SPEED_10;
+
+	return 0;
+}
+EXPORT_SYMBOL(genphy_read_status_fixed);
+
+/**
+ * genphy_read_status - check the link status and update current link state
+ * @phydev: target phy_device struct
+ *
+ * Description: Check the link, then figure out the current state
+ *   by comparing what we advertise with what the link partner
+ *   advertises.  Start by checking the gigabit possibilities,
+ *   then move on to 10/100.
+ */
+int genphy_read_status(struct phy_device *phydev)
+{
+	int err, old_link = phydev->link;
+
+	/* Update the link, but return if there was an error */
+	err = genphy_update_link(phydev);
+	if (err)
+		return err;
+
+	/* why bother the PHY if nothing can have changed */
+	if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
+		return 0;
+
+	phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED;
+	phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
+	phydev->speed = SPEED_UNKNOWN;
+	phydev->duplex = DUPLEX_UNKNOWN;
+	phydev->pause = 0;
+	phydev->asym_pause = 0;
+
+	if (phydev->is_gigabit_capable) {
+		err = genphy_read_master_slave(phydev);
+		if (err < 0)
+			return err;
+	}
+
+	err = genphy_read_lpa(phydev);
+	if (err < 0)
+		return err;
+
+	if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
+		phy_resolve_aneg_linkmode(phydev);
+	} else if (phydev->autoneg == AUTONEG_DISABLE) {
+		err = genphy_read_status_fixed(phydev);
+		if (err < 0)
+			return err;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(genphy_read_status);
+
+/**
+ * genphy_c37_read_status - check the link status and update current link state
+ * @phydev: target phy_device struct
+ *
+ * Description: Check the link, then figure out the current state
+ *   by comparing what we advertise with what the link partner
+ *   advertises. This function is for Clause 37 1000Base-X mode.
+ */
+int genphy_c37_read_status(struct phy_device *phydev)
+{
+	int lpa, err, old_link = phydev->link;
+
+	/* Update the link, but return if there was an error */
+	err = genphy_update_link(phydev);
+	if (err)
+		return err;
+
+	/* why bother the PHY if nothing can have changed */
+	if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
+		return 0;
+
+	phydev->duplex = DUPLEX_UNKNOWN;
+	phydev->pause = 0;
+	phydev->asym_pause = 0;
+
+	if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
+		lpa = phy_read(phydev, MII_LPA);
+		if (lpa < 0)
+			return lpa;
+
+		linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
+				 phydev->lp_advertising, lpa & LPA_LPACK);
+		linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
+				 phydev->lp_advertising, lpa & LPA_1000XFULL);
+		linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+				 phydev->lp_advertising, lpa & LPA_1000XPAUSE);
+		linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+				 phydev->lp_advertising,
+				 lpa & LPA_1000XPAUSE_ASYM);
+
+		phy_resolve_aneg_linkmode(phydev);
+	} else if (phydev->autoneg == AUTONEG_DISABLE) {
+		int bmcr = phy_read(phydev, MII_BMCR);
+
+		if (bmcr < 0)
+			return bmcr;
+
+		if (bmcr & BMCR_FULLDPLX)
+			phydev->duplex = DUPLEX_FULL;
+		else
+			phydev->duplex = DUPLEX_HALF;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(genphy_c37_read_status);
+
+/**
+ * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
+ * @phydev: target phy_device struct
+ *
+ * Description: Perform a software PHY reset using the standard
+ * BMCR_RESET bit and poll for the reset bit to be cleared.
+ *
+ * Returns: 0 on success, < 0 on failure
+ */
+int genphy_soft_reset(struct phy_device *phydev)
+{
+	u16 res = BMCR_RESET;
+	int ret;
+
+	if (phydev->autoneg == AUTONEG_ENABLE)
+		res |= BMCR_ANRESTART;
+
+	ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res);
+	if (ret < 0)
+		return ret;
+
+	/* Clause 22 states that setting bit BMCR_RESET sets control registers
+	 * to their default value. Therefore the POWER DOWN bit is supposed to
+	 * be cleared after soft reset.
+	 */
+	phydev->suspended = 0;
+
+	ret = phy_poll_reset(phydev);
+	if (ret)
+		return ret;
+
+	/* BMCR may be reset to defaults */
+	if (phydev->autoneg == AUTONEG_DISABLE)
+		ret = genphy_setup_forced(phydev);
+
+	return ret;
+}
+EXPORT_SYMBOL(genphy_soft_reset);
+
+irqreturn_t genphy_handle_interrupt_no_ack(struct phy_device *phydev)
+{
+	/* It seems there are cases where the interrupts are handled by another
+	 * entity (ie an IRQ controller embedded inside the PHY) and do not
+	 * need any other interraction from phylib. In this case, just trigger
+	 * the state machine directly.
+	 */
+	phy_trigger_machine(phydev);
+
+	return 0;
+}
+EXPORT_SYMBOL(genphy_handle_interrupt_no_ack);
+
+/**
+ * genphy_read_abilities - read PHY abilities from Clause 22 registers
+ * @phydev: target phy_device struct
+ *
+ * Description: Reads the PHY's abilities and populates
+ * phydev->supported accordingly.
+ *
+ * Returns: 0 on success, < 0 on failure
+ */
+int genphy_read_abilities(struct phy_device *phydev)
+{
+	int val;
+
+	linkmode_set_bit_array(phy_basic_ports_array,
+			       ARRAY_SIZE(phy_basic_ports_array),
+			       phydev->supported);
+
+	val = phy_read(phydev, MII_BMSR);
+	if (val < 0)
+		return val;
+
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported,
+			 val & BMSR_ANEGCAPABLE);
+
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported,
+			 val & BMSR_100FULL);
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported,
+			 val & BMSR_100HALF);
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported,
+			 val & BMSR_10FULL);
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported,
+			 val & BMSR_10HALF);
+
+	if (val & BMSR_ESTATEN) {
+		val = phy_read(phydev, MII_ESTATUS);
+		if (val < 0)
+			return val;
+
+		linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
+				 phydev->supported, val & ESTATUS_1000_TFULL);
+		linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
+				 phydev->supported, val & ESTATUS_1000_THALF);
+		linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
+				 phydev->supported, val & ESTATUS_1000_XFULL);
+	}
+
+	/* This is optional functionality. If not supported, we may get an error
+	 * which should be ignored.
+	 */
+	genphy_c45_read_eee_abilities(phydev);
+
+	return 0;
+}
+EXPORT_SYMBOL(genphy_read_abilities);
+
+/* This is used for the phy device which doesn't support the MMD extended
+ * register access, but it does have side effect when we are trying to access
+ * the MMD register via indirect method.
+ */
+int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
+{
+	return -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(genphy_read_mmd_unsupported);
+
+int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
+				 u16 regnum, u16 val)
+{
+	return -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(genphy_write_mmd_unsupported);
+
+int genphy_suspend(struct phy_device *phydev)
+{
+	return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
+}
+EXPORT_SYMBOL(genphy_suspend);
+
+int genphy_resume(struct phy_device *phydev)
+{
+	return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
+}
+EXPORT_SYMBOL(genphy_resume);
+
+int genphy_loopback(struct phy_device *phydev, bool enable)
+{
+	if (enable) {
+		u16 val, ctl = BMCR_LOOPBACK;
+		int ret;
+
+		ctl |= mii_bmcr_encode_fixed(phydev->speed, phydev->duplex);
+
+		phy_modify(phydev, MII_BMCR, ~0, ctl);
+
+		ret = phy_read_poll_timeout(phydev, MII_BMSR, val,
+					    val & BMSR_LSTATUS,
+				    5000, 500000, true);
+		if (ret)
+			return ret;
+	} else {
+		phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 0);
+
+		phy_config_aneg(phydev);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(genphy_loopback);
+
+/**
+ * phy_remove_link_mode - Remove a supported link mode
+ * @phydev: phy_device structure to remove link mode from
+ * @link_mode: Link mode to be removed
+ *
+ * Description: Some MACs don't support all link modes which the PHY
+ * does.  e.g. a 1G MAC often does not support 1000Half. Add a helper
+ * to remove a link mode.
+ */
+void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode)
+{
+	linkmode_clear_bit(link_mode, phydev->supported);
+	phy_advertise_supported(phydev);
+}
+EXPORT_SYMBOL(phy_remove_link_mode);
+
+static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src)
+{
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst,
+		linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src));
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst,
+		linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src));
+}
+
+/**
+ * phy_advertise_supported - Advertise all supported modes
+ * @phydev: target phy_device struct
+ *
+ * Description: Called to advertise all supported modes, doesn't touch
+ * pause mode advertising.
+ */
+void phy_advertise_supported(struct phy_device *phydev)
+{
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(new);
+
+	linkmode_copy(new, phydev->supported);
+	phy_copy_pause_bits(new, phydev->advertising);
+	linkmode_copy(phydev->advertising, new);
+}
+EXPORT_SYMBOL(phy_advertise_supported);
+
+/**
+ * phy_support_sym_pause - Enable support of symmetrical pause
+ * @phydev: target phy_device struct
+ *
+ * Description: Called by the MAC to indicate is supports symmetrical
+ * Pause, but not asym pause.
+ */
+void phy_support_sym_pause(struct phy_device *phydev)
+{
+	linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported);
+	phy_copy_pause_bits(phydev->advertising, phydev->supported);
+}
+EXPORT_SYMBOL(phy_support_sym_pause);
+
+/**
+ * phy_support_asym_pause - Enable support of asym pause
+ * @phydev: target phy_device struct
+ *
+ * Description: Called by the MAC to indicate is supports Asym Pause.
+ */
+void phy_support_asym_pause(struct phy_device *phydev)
+{
+	phy_copy_pause_bits(phydev->advertising, phydev->supported);
+}
+EXPORT_SYMBOL(phy_support_asym_pause);
+
+/**
+ * phy_set_sym_pause - Configure symmetric Pause
+ * @phydev: target phy_device struct
+ * @rx: Receiver Pause is supported
+ * @tx: Transmit Pause is supported
+ * @autoneg: Auto neg should be used
+ *
+ * Description: Configure advertised Pause support depending on if
+ * receiver pause and pause auto neg is supported. Generally called
+ * from the set_pauseparam .ndo.
+ */
+void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx,
+		       bool autoneg)
+{
+	linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
+
+	if (rx && tx && autoneg)
+		linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+				 phydev->supported);
+
+	linkmode_copy(phydev->advertising, phydev->supported);
+}
+EXPORT_SYMBOL(phy_set_sym_pause);
+
+/**
+ * phy_set_asym_pause - Configure Pause and Asym Pause
+ * @phydev: target phy_device struct
+ * @rx: Receiver Pause is supported
+ * @tx: Transmit Pause is supported
+ *
+ * Description: Configure advertised Pause support depending on if
+ * transmit and receiver pause is supported. If there has been a
+ * change in adverting, trigger a new autoneg. Generally called from
+ * the set_pauseparam .ndo.
+ */
+void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx)
+{
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv);
+
+	linkmode_copy(oldadv, phydev->advertising);
+	linkmode_set_pause(phydev->advertising, tx, rx);
+
+	if (!linkmode_equal(oldadv, phydev->advertising) &&
+	    phydev->autoneg)
+		phy_start_aneg(phydev);
+}
+EXPORT_SYMBOL(phy_set_asym_pause);
+
+/**
+ * phy_validate_pause - Test if the PHY/MAC support the pause configuration
+ * @phydev: phy_device struct
+ * @pp: requested pause configuration
+ *
+ * Description: Test if the PHY/MAC combination supports the Pause
+ * configuration the user is requesting. Returns True if it is
+ * supported, false otherwise.
+ */
+bool phy_validate_pause(struct phy_device *phydev,
+			struct ethtool_pauseparam *pp)
+{
+	if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+			       phydev->supported) && pp->rx_pause)
+		return false;
+
+	if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+			       phydev->supported) &&
+	    pp->rx_pause != pp->tx_pause)
+		return false;
+
+	return true;
+}
+EXPORT_SYMBOL(phy_validate_pause);
+
+/**
+ * phy_get_pause - resolve negotiated pause modes
+ * @phydev: phy_device struct
+ * @tx_pause: pointer to bool to indicate whether transmit pause should be
+ * enabled.
+ * @rx_pause: pointer to bool to indicate whether receive pause should be
+ * enabled.
+ *
+ * Resolve and return the flow control modes according to the negotiation
+ * result. This includes checking that we are operating in full duplex mode.
+ * See linkmode_resolve_pause() for further details.
+ */
+void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause)
+{
+	if (phydev->duplex != DUPLEX_FULL) {
+		*tx_pause = false;
+		*rx_pause = false;
+		return;
+	}
+
+	return linkmode_resolve_pause(phydev->advertising,
+				      phydev->lp_advertising,
+				      tx_pause, rx_pause);
+}
+EXPORT_SYMBOL(phy_get_pause);
+
+#if IS_ENABLED(CONFIG_OF_MDIO)
+static int phy_get_int_delay_property(struct device *dev, const char *name)
+{
+	s32 int_delay;
+	int ret;
+
+	ret = device_property_read_u32(dev, name, &int_delay);
+	if (ret)
+		return ret;
+
+	return int_delay;
+}
+#else
+static int phy_get_int_delay_property(struct device *dev, const char *name)
+{
+	return -EINVAL;
+}
+#endif
+
+/**
+ * phy_get_internal_delay - returns the index of the internal delay
+ * @phydev: phy_device struct
+ * @dev: pointer to the devices device struct
+ * @delay_values: array of delays the PHY supports
+ * @size: the size of the delay array
+ * @is_rx: boolean to indicate to get the rx internal delay
+ *
+ * Returns the index within the array of internal delay passed in.
+ * If the device property is not present then the interface type is checked
+ * if the interface defines use of internal delay then a 1 is returned otherwise
+ * a 0 is returned.
+ * The array must be in ascending order. If PHY does not have an ascending order
+ * array then size = 0 and the value of the delay property is returned.
+ * Return -EINVAL if the delay is invalid or cannot be found.
+ */
+s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev,
+			   const int *delay_values, int size, bool is_rx)
+{
+	s32 delay;
+	int i;
+
+	if (is_rx) {
+		delay = phy_get_int_delay_property(dev, "rx-internal-delay-ps");
+		if (delay < 0 && size == 0) {
+			if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+			    phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
+				return 1;
+			else
+				return 0;
+		}
+
+	} else {
+		delay = phy_get_int_delay_property(dev, "tx-internal-delay-ps");
+		if (delay < 0 && size == 0) {
+			if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+			    phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
+				return 1;
+			else
+				return 0;
+		}
+	}
+
+	if (delay < 0)
+		return delay;
+
+	if (delay && size == 0)
+		return delay;
+
+	if (delay < delay_values[0] || delay > delay_values[size - 1]) {
+		phydev_err(phydev, "Delay %d is out of range\n", delay);
+		return -EINVAL;
+	}
+
+	if (delay == delay_values[0])
+		return 0;
+
+	for (i = 1; i < size; i++) {
+		if (delay == delay_values[i])
+			return i;
+
+		/* Find an approximate index by looking up the table */
+		if (delay > delay_values[i - 1] &&
+		    delay < delay_values[i]) {
+			if (delay - delay_values[i - 1] <
+			    delay_values[i] - delay)
+				return i - 1;
+			else
+				return i;
+		}
+	}
+
+	phydev_err(phydev, "error finding internal delay index for %d\n",
+		   delay);
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL(phy_get_internal_delay);
+
+static bool phy_drv_supports_irq(struct phy_driver *phydrv)
+{
+	return phydrv->config_intr && phydrv->handle_interrupt;
+}
+
+static int phy_led_set_brightness(struct led_classdev *led_cdev,
+				  enum led_brightness value)
+{
+	struct phy_led *phyled = to_phy_led(led_cdev);
+	struct phy_device *phydev = phyled->phydev;
+	int err;
+
+	mutex_lock(&phydev->lock);
+	err = phydev->drv->led_brightness_set(phydev, phyled->index, value);
+	mutex_unlock(&phydev->lock);
+
+	return err;
+}
+
+static int phy_led_blink_set(struct led_classdev *led_cdev,
+			     unsigned long *delay_on,
+			     unsigned long *delay_off)
+{
+	struct phy_led *phyled = to_phy_led(led_cdev);
+	struct phy_device *phydev = phyled->phydev;
+	int err;
+
+	mutex_lock(&phydev->lock);
+	err = phydev->drv->led_blink_set(phydev, phyled->index,
+					 delay_on, delay_off);
+	mutex_unlock(&phydev->lock);
+
+	return err;
+}
+
+static __maybe_unused struct device *
+phy_led_hw_control_get_device(struct led_classdev *led_cdev)
+{
+	struct phy_led *phyled = to_phy_led(led_cdev);
+	struct phy_device *phydev = phyled->phydev;
+
+	if (phydev->attached_dev)
+		return &phydev->attached_dev->dev;
+	return NULL;
+}
+
+static int __maybe_unused
+phy_led_hw_control_get(struct led_classdev *led_cdev,
+		       unsigned long *rules)
+{
+	struct phy_led *phyled = to_phy_led(led_cdev);
+	struct phy_device *phydev = phyled->phydev;
+	int err;
+
+	mutex_lock(&phydev->lock);
+	err = phydev->drv->led_hw_control_get(phydev, phyled->index, rules);
+	mutex_unlock(&phydev->lock);
+
+	return err;
+}
+
+static int __maybe_unused
+phy_led_hw_control_set(struct led_classdev *led_cdev,
+		       unsigned long rules)
+{
+	struct phy_led *phyled = to_phy_led(led_cdev);
+	struct phy_device *phydev = phyled->phydev;
+	int err;
+
+	mutex_lock(&phydev->lock);
+	err = phydev->drv->led_hw_control_set(phydev, phyled->index, rules);
+	mutex_unlock(&phydev->lock);
+
+	return err;
+}
+
+static __maybe_unused int phy_led_hw_is_supported(struct led_classdev *led_cdev,
+						  unsigned long rules)
+{
+	struct phy_led *phyled = to_phy_led(led_cdev);
+	struct phy_device *phydev = phyled->phydev;
+	int err;
+
+	mutex_lock(&phydev->lock);
+	err = phydev->drv->led_hw_is_supported(phydev, phyled->index, rules);
+	mutex_unlock(&phydev->lock);
+
+	return err;
+}
+
+static void phy_leds_unregister(struct phy_device *phydev)
+{
+	struct phy_led *phyled;
+
+	list_for_each_entry(phyled, &phydev->leds, list) {
+		led_classdev_unregister(&phyled->led_cdev);
+	}
+}
+
+static int of_phy_led(struct phy_device *phydev,
+		      struct device_node *led)
+{
+	struct device *dev = &phydev->mdio.dev;
+	struct led_init_data init_data = {};
+	struct led_classdev *cdev;
+	struct phy_led *phyled;
+	u32 index;
+	int err;
+
+	phyled = devm_kzalloc(dev, sizeof(*phyled), GFP_KERNEL);
+	if (!phyled)
+		return -ENOMEM;
+
+	cdev = &phyled->led_cdev;
+	phyled->phydev = phydev;
+
+	err = of_property_read_u32(led, "reg", &index);
+	if (err)
+		return err;
+	if (index > U8_MAX)
+		return -EINVAL;
+
+	phyled->index = index;
+	if (phydev->drv->led_brightness_set)
+		cdev->brightness_set_blocking = phy_led_set_brightness;
+	if (phydev->drv->led_blink_set)
+		cdev->blink_set = phy_led_blink_set;
+
+#ifdef CONFIG_LEDS_TRIGGERS
+	if (phydev->drv->led_hw_is_supported &&
+	    phydev->drv->led_hw_control_set &&
+	    phydev->drv->led_hw_control_get) {
+		cdev->hw_control_is_supported = phy_led_hw_is_supported;
+		cdev->hw_control_set = phy_led_hw_control_set;
+		cdev->hw_control_get = phy_led_hw_control_get;
+		cdev->hw_control_trigger = "netdev";
+	}
+
+	cdev->hw_control_get_device = phy_led_hw_control_get_device;
+#endif
+	cdev->max_brightness = 1;
+	init_data.devicename = dev_name(&phydev->mdio.dev);
+	init_data.fwnode = of_fwnode_handle(led);
+	init_data.devname_mandatory = true;
+
+	err = led_classdev_register_ext(dev, cdev, &init_data);
+	if (err)
+		return err;
+
+	list_add(&phyled->list, &phydev->leds);
+
+	return 0;
+}
+
+static int of_phy_leds(struct phy_device *phydev)
+{
+	struct device_node *node = phydev->mdio.dev.of_node;
+	struct device_node *leds, *led;
+	int err;
+
+	if (!IS_ENABLED(CONFIG_OF_MDIO))
+		return 0;
+
+	if (!node)
+		return 0;
+
+	leds = of_get_child_by_name(node, "leds");
+	if (!leds)
+		return 0;
+
+	for_each_available_child_of_node(leds, led) {
+		err = of_phy_led(phydev, led);
+		if (err) {
+			of_node_put(led);
+			phy_leds_unregister(phydev);
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * fwnode_mdio_find_device - Given a fwnode, find the mdio_device
+ * @fwnode: pointer to the mdio_device's fwnode
+ *
+ * If successful, returns a pointer to the mdio_device with the embedded
+ * struct device refcount incremented by one, or NULL on failure.
+ * The caller should call put_device() on the mdio_device after its use.
+ */
+struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode)
+{
+	struct device *d;
+
+	if (!fwnode)
+		return NULL;
+
+	d = bus_find_device_by_fwnode(&mdio_bus_type, fwnode);
+	if (!d)
+		return NULL;
+
+	return to_mdio_device(d);
+}
+EXPORT_SYMBOL(fwnode_mdio_find_device);
+
+/**
+ * fwnode_phy_find_device - For provided phy_fwnode, find phy_device.
+ *
+ * @phy_fwnode: Pointer to the phy's fwnode.
+ *
+ * If successful, returns a pointer to the phy_device with the embedded
+ * struct device refcount incremented by one, or NULL on failure.
+ */
+struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode)
+{
+	struct mdio_device *mdiodev;
+
+	mdiodev = fwnode_mdio_find_device(phy_fwnode);
+	if (!mdiodev)
+		return NULL;
+
+	if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
+		return to_phy_device(&mdiodev->dev);
+
+	put_device(&mdiodev->dev);
+
+	return NULL;
+}
+EXPORT_SYMBOL(fwnode_phy_find_device);
+
+/**
+ * device_phy_find_device - For the given device, get the phy_device
+ * @dev: Pointer to the given device
+ *
+ * Refer return conditions of fwnode_phy_find_device().
+ */
+struct phy_device *device_phy_find_device(struct device *dev)
+{
+	return fwnode_phy_find_device(dev_fwnode(dev));
+}
+EXPORT_SYMBOL_GPL(device_phy_find_device);
+
+/**
+ * fwnode_get_phy_node - Get the phy_node using the named reference.
+ * @fwnode: Pointer to fwnode from which phy_node has to be obtained.
+ *
+ * Refer return conditions of fwnode_find_reference().
+ * For ACPI, only "phy-handle" is supported. Legacy DT properties "phy"
+ * and "phy-device" are not supported in ACPI. DT supports all the three
+ * named references to the phy node.
+ */
+struct fwnode_handle *fwnode_get_phy_node(const struct fwnode_handle *fwnode)
+{
+	struct fwnode_handle *phy_node;
+
+	/* Only phy-handle is used for ACPI */
+	phy_node = fwnode_find_reference(fwnode, "phy-handle", 0);
+	if (is_acpi_node(fwnode) || !IS_ERR(phy_node))
+		return phy_node;
+	phy_node = fwnode_find_reference(fwnode, "phy", 0);
+	if (IS_ERR(phy_node))
+		phy_node = fwnode_find_reference(fwnode, "phy-device", 0);
+	return phy_node;
+}
+EXPORT_SYMBOL_GPL(fwnode_get_phy_node);
+
+/**
+ * phy_probe - probe and init a PHY device
+ * @dev: device to probe and init
+ *
+ * Take care of setting up the phy_device structure, set the state to READY.
+ */
+static int phy_probe(struct device *dev)
+{
+	struct phy_device *phydev = to_phy_device(dev);
+	struct device_driver *drv = phydev->mdio.dev.driver;
+	struct phy_driver *phydrv = to_phy_driver(drv);
+	int err = 0;
+
+	phydev->drv = phydrv;
+
+	/* Disable the interrupt if the PHY doesn't support it
+	 * but the interrupt is still a valid one
+	 */
+	if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev))
+		phydev->irq = PHY_POLL;
+
+	if (phydrv->flags & PHY_IS_INTERNAL)
+		phydev->is_internal = true;
+
+	/* Deassert the reset signal */
+	phy_device_reset(phydev, 0);
+
+	if (phydev->drv->probe) {
+		err = phydev->drv->probe(phydev);
+		if (err)
+			goto out;
+	}
+
+	phy_disable_interrupts(phydev);
+
+	/* Start out supporting everything. Eventually,
+	 * a controller will attach, and may modify one
+	 * or both of these values
+	 */
+	if (phydrv->features) {
+		linkmode_copy(phydev->supported, phydrv->features);
+		genphy_c45_read_eee_abilities(phydev);
+	}
+	else if (phydrv->get_features)
+		err = phydrv->get_features(phydev);
+	else if (phydev->is_c45)
+		err = genphy_c45_pma_read_abilities(phydev);
+	else
+		err = genphy_read_abilities(phydev);
+
+	if (err)
+		goto out;
+
+	if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
+			       phydev->supported))
+		phydev->autoneg = 0;
+
+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
+			      phydev->supported))
+		phydev->is_gigabit_capable = 1;
+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
+			      phydev->supported))
+		phydev->is_gigabit_capable = 1;
+
+	of_set_phy_supported(phydev);
+	phy_advertise_supported(phydev);
+
+	/* Get PHY default EEE advertising modes and handle them as potentially
+	 * safe initial configuration.
+	 */
+	err = genphy_c45_read_eee_adv(phydev, phydev->advertising_eee);
+	if (err)
+		goto out;
+
+	/* There is no "enabled" flag. If PHY is advertising, assume it is
+	 * kind of enabled.
+	 */
+	phydev->eee_enabled = !linkmode_empty(phydev->advertising_eee);
+
+	/* Some PHYs may advertise, by default, not support EEE modes. So,
+	 * we need to clean them.
+	 */
+	if (phydev->eee_enabled)
+		linkmode_and(phydev->advertising_eee, phydev->supported_eee,
+			     phydev->advertising_eee);
+
+	/* Get the EEE modes we want to prohibit. We will ask
+	 * the PHY stop advertising these mode later on
+	 */
+	of_set_phy_eee_broken(phydev);
+
+	/* The Pause Frame bits indicate that the PHY can support passing
+	 * pause frames. During autonegotiation, the PHYs will determine if
+	 * they should allow pause frames to pass.  The MAC driver should then
+	 * use that result to determine whether to enable flow control via
+	 * pause frames.
+	 *
+	 * Normally, PHY drivers should not set the Pause bits, and instead
+	 * allow phylib to do that.  However, there may be some situations
+	 * (e.g. hardware erratum) where the driver wants to set only one
+	 * of these bits.
+	 */
+	if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) &&
+	    !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) {
+		linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+				 phydev->supported);
+		linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+				 phydev->supported);
+	}
+
+	/* Set the state to READY by default */
+	phydev->state = PHY_READY;
+
+	/* Get the LEDs from the device tree, and instantiate standard
+	 * LEDs for them.
+	 */
+	if (IS_ENABLED(CONFIG_PHYLIB_LEDS))
+		err = of_phy_leds(phydev);
+
+out:
+	/* Re-assert the reset signal on error */
+	if (err)
+		phy_device_reset(phydev, 1);
+
+	return err;
+}
+
+static int phy_remove(struct device *dev)
+{
+	struct phy_device *phydev = to_phy_device(dev);
+
+	cancel_delayed_work_sync(&phydev->state_queue);
+
+	if (IS_ENABLED(CONFIG_PHYLIB_LEDS))
+		phy_leds_unregister(phydev);
+
+	phydev->state = PHY_DOWN;
+
+	sfp_bus_del_upstream(phydev->sfp_bus);
+	phydev->sfp_bus = NULL;
+
+	if (phydev->drv && phydev->drv->remove)
+		phydev->drv->remove(phydev);
+
+	/* Assert the reset signal */
+	phy_device_reset(phydev, 1);
+
+	phydev->drv = NULL;
+
+	return 0;
+}
+
+/**
+ * phy_driver_register - register a phy_driver with the PHY layer
+ * @new_driver: new phy_driver to register
+ * @owner: module owning this PHY
+ */
+int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
+{
+	int retval;
+
+	/* Either the features are hard coded, or dynamically
+	 * determined. It cannot be both.
+	 */
+	if (WARN_ON(new_driver->features && new_driver->get_features)) {
+		pr_err("%s: features and get_features must not both be set\n",
+		       new_driver->name);
+		return -EINVAL;
+	}
+
+	/* PHYLIB device drivers must not match using a DT compatible table
+	 * as this bypasses our checks that the mdiodev that is being matched
+	 * is backed by a struct phy_device. If such a case happens, we will
+	 * make out-of-bounds accesses and lockup in phydev->lock.
+	 */
+	if (WARN(new_driver->mdiodrv.driver.of_match_table,
+		 "%s: driver must not provide a DT match table\n",
+		 new_driver->name))
+		return -EINVAL;
+
+	new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
+	new_driver->mdiodrv.driver.name = new_driver->name;
+	new_driver->mdiodrv.driver.bus = &mdio_bus_type;
+	new_driver->mdiodrv.driver.probe = phy_probe;
+	new_driver->mdiodrv.driver.remove = phy_remove;
+	new_driver->mdiodrv.driver.owner = owner;
+	new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS;
+
+	retval = driver_register(&new_driver->mdiodrv.driver);
+	if (retval) {
+		pr_err("%s: Error %d in registering driver\n",
+		       new_driver->name, retval);
+
+		return retval;
+	}
+
+	pr_debug("%s: Registered new driver\n", new_driver->name);
+
+	return 0;
+}
+EXPORT_SYMBOL(phy_driver_register);
+
+int phy_drivers_register(struct phy_driver *new_driver, int n,
+			 struct module *owner)
+{
+	int i, ret = 0;
+
+	for (i = 0; i < n; i++) {
+		ret = phy_driver_register(new_driver + i, owner);
+		if (ret) {
+			while (i-- > 0)
+				phy_driver_unregister(new_driver + i);
+			break;
+		}
+	}
+	return ret;
+}
+EXPORT_SYMBOL(phy_drivers_register);
+
+void phy_driver_unregister(struct phy_driver *drv)
+{
+	driver_unregister(&drv->mdiodrv.driver);
+}
+EXPORT_SYMBOL(phy_driver_unregister);
+
+void phy_drivers_unregister(struct phy_driver *drv, int n)
+{
+	int i;
+
+	for (i = 0; i < n; i++)
+		phy_driver_unregister(drv + i);
+}
+EXPORT_SYMBOL(phy_drivers_unregister);
+
+static struct phy_driver genphy_driver = {
+	.phy_id		= 0xffffffff,
+	.phy_id_mask	= 0xffffffff,
+	.name		= "Generic PHY",
+	.get_features	= genphy_read_abilities,
+	.suspend	= genphy_suspend,
+	.resume		= genphy_resume,
+	.set_loopback   = genphy_loopback,
+};
+
+static const struct ethtool_phy_ops phy_ethtool_phy_ops = {
+	.get_sset_count		= phy_ethtool_get_sset_count,
+	.get_strings		= phy_ethtool_get_strings,
+	.get_stats		= phy_ethtool_get_stats,
+	.get_plca_cfg		= phy_ethtool_get_plca_cfg,
+	.set_plca_cfg		= phy_ethtool_set_plca_cfg,
+	.get_plca_status	= phy_ethtool_get_plca_status,
+	.start_cable_test	= phy_start_cable_test,
+	.start_cable_test_tdr	= phy_start_cable_test_tdr,
+};
+
+static const struct phylib_stubs __phylib_stubs = {
+	.hwtstamp_get = __phy_hwtstamp_get,
+	.hwtstamp_set = __phy_hwtstamp_set,
+};
+
+static void phylib_register_stubs(void)
+{
+	phylib_stubs = &__phylib_stubs;
+}
+
+static void phylib_unregister_stubs(void)
+{
+	phylib_stubs = NULL;
+}
+
+static int __init phy_init(void)
+{
+	int rc;
+
+	rtnl_lock();
+	ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops);
+	phylib_register_stubs();
+	rtnl_unlock();
+
+	rc = mdio_bus_init();
+	if (rc)
+		goto err_ethtool_phy_ops;
+
+	features_init();
+
+	rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE);
+	if (rc)
+		goto err_mdio_bus;
+
+	rc = phy_driver_register(&genphy_driver, THIS_MODULE);
+	if (rc)
+		goto err_c45;
+
+	return 0;
+
+err_c45:
+	phy_driver_unregister(&genphy_c45_driver);
+err_mdio_bus:
+	mdio_bus_exit();
+err_ethtool_phy_ops:
+	rtnl_lock();
+	phylib_unregister_stubs();
+	ethtool_set_ethtool_phy_ops(NULL);
+	rtnl_unlock();
+
+	return rc;
+}
+
+static void __exit phy_exit(void)
+{
+	phy_driver_unregister(&genphy_c45_driver);
+	phy_driver_unregister(&genphy_driver);
+	mdio_bus_exit();
+	rtnl_lock();
+	phylib_unregister_stubs();
+	ethtool_set_ethtool_phy_ops(NULL);
+	rtnl_unlock();
+}
+
+subsys_initcall(phy_init);
+module_exit(phy_exit);