1 // SPDX-License-Identifier: GPL-2.0+
2 /* MDIO Bus interface
42 #include "mdio-boardinfo.h"
47 	mdiodev->reset_gpio = gpiod_get_optional(&mdiodev->dev,  in mdiobus_register_gpiod()
49 	if (IS_ERR(mdiodev->reset_gpio))  in mdiobus_register_gpiod()
50 		return PTR_ERR(mdiodev->reset_gpio);  in mdiobus_register_gpiod()
52 	if (mdiodev->reset_gpio)  in mdiobus_register_gpiod()
53 		gpiod_set_consumer_name(mdiodev->reset_gpio, "PHY reset");  in mdiobus_register_gpiod()
62 	reset = reset_control_get_optional_exclusive(&mdiodev->dev, "phy");  in mdiobus_register_reset()
66 	mdiodev->reset_ctrl = reset;  in mdiobus_register_reset()
75 	if (mdiodev->bus->mdio_map[mdiodev->addr])  in mdiobus_register_device()
76 		return -EBUSY;  in mdiobus_register_device()
78 	if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY) {  in mdiobus_register_device()
91 	mdiodev->bus->mdio_map[mdiodev->addr] = mdiodev;  in mdiobus_register_device()
99 	if (mdiodev->bus->mdio_map[mdiodev->addr] != mdiodev)  in mdiobus_unregister_device()
100 		return -EINVAL;  in mdiobus_unregister_device()
102 	reset_control_put(mdiodev->reset_ctrl);  in mdiobus_unregister_device()
104 	mdiodev->bus->mdio_map[mdiodev->addr] = NULL;  in mdiobus_unregister_device()
110 static struct mdio_device *mdiobus_find_device(struct mii_bus *bus, int addr)  in mdiobus_find_device()  argument
112 	bool addr_valid = addr >= 0 && addr < ARRAY_SIZE(bus->mdio_map);  in mdiobus_find_device()
114 	if (WARN_ONCE(!addr_valid, "addr %d out of range\n", addr))  in mdiobus_find_device()
117 	return bus->mdio_map[addr];  in mdiobus_find_device()
120 struct phy_device *mdiobus_get_phy(struct mii_bus *bus, int addr)  in mdiobus_get_phy()  argument
124 	mdiodev = mdiobus_find_device(bus, addr);  in mdiobus_get_phy()
128 	if (!(mdiodev->flags & MDIO_DEVICE_FLAG_PHY))  in mdiobus_get_phy()
135 bool mdiobus_is_registered_device(struct mii_bus *bus, int addr)  in mdiobus_is_registered_device()  argument
137 	return mdiobus_find_device(bus, addr) != NULL;  in mdiobus_is_registered_device()
142  * mdiobus_alloc_size - allocate a mii_bus structure
144  * If non-zero, then bus->priv is points to that memory.
146  * Description: called by a bus driver to allocate an mii_bus
151 	struct mii_bus *bus;  in mdiobus_alloc_size()  local
152 	size_t aligned_size = ALIGN(sizeof(*bus), NETDEV_ALIGN);  in mdiobus_alloc_size()
160 		alloc_size = sizeof(*bus);  in mdiobus_alloc_size()
162 	bus = kzalloc(alloc_size, GFP_KERNEL);  in mdiobus_alloc_size()
163 	if (!bus)  in mdiobus_alloc_size()
166 	bus->state = MDIOBUS_ALLOCATED;  in mdiobus_alloc_size()
168 		bus->priv = (void *)bus + aligned_size;  in mdiobus_alloc_size()
170 	/* Initialise the interrupts to polling and 64-bit seqcounts */  in mdiobus_alloc_size()
172 		bus->irq[i] = PHY_POLL;  in mdiobus_alloc_size()
173 		u64_stats_init(&bus->stats[i].syncp);  in mdiobus_alloc_size()
176 	return bus;  in mdiobus_alloc_size()
181  * mdiobus_release - mii_bus device release callback
189 	struct mii_bus *bus = to_mii_bus(d);  in mdiobus_release()  local
191 	WARN(bus->state != MDIOBUS_RELEASED &&  in mdiobus_release()
193 	     bus->state != MDIOBUS_ALLOCATED,  in mdiobus_release()
195 	     bus->id);  in mdiobus_release()
196 	kfree(bus);  in mdiobus_release()
200 	int addr;  member
211 		start = u64_stats_fetch_begin(&s->syncp);  in mdio_bus_get_stat()
213 	} while (u64_stats_fetch_retry(&s->syncp, start));  in mdio_bus_get_stat()
218 static u64 mdio_bus_get_global_stat(struct mii_bus *bus, unsigned int offset)  in mdio_bus_get_global_stat()  argument
224 		val += mdio_bus_get_stat(&bus->stats[i], offset);  in mdio_bus_get_global_stat()
233 	struct mii_bus *bus = to_mii_bus(dev);  in mdio_bus_stat_field_show()  local
239 	sattr = eattr->var;  in mdio_bus_stat_field_show()
241 	if (sattr->addr < 0)  in mdio_bus_stat_field_show()
242 		val = mdio_bus_get_global_stat(bus, sattr->field_offset);  in mdio_bus_stat_field_show()
244 		val = mdio_bus_get_stat(&bus->stats[sattr->addr],  in mdio_bus_stat_field_show()
245 					sattr->field_offset);  in mdio_bus_stat_field_show()
255 	struct mii_bus *bus = mdiodev->bus;  in mdio_bus_device_stat_field_show()  local
258 	int addr = mdiodev->addr;  in mdio_bus_device_stat_field_show()  local
262 	sattr = eattr->var;  in mdio_bus_device_stat_field_show()
264 	val = mdio_bus_get_stat(&bus->stats[addr], sattr->field_offset);  in mdio_bus_device_stat_field_show()
275 		-1, offsetof(struct mdio_bus_stats, field)		\
283 		-1, offsetof(struct mdio_bus_stats, field)		\
295 #define MDIO_BUS_STATS_ADDR_ATTR_DECL(field, addr, file)		\  argument
296 static struct dev_ext_attribute dev_attr_mdio_bus_addr_##field##_##addr = { \
301 		addr, offsetof(struct mdio_bus_stats, field)		\
305 #define MDIO_BUS_STATS_ADDR_ATTR(field, addr)				\  argument
306 	MDIO_BUS_STATS_ADDR_ATTR_DECL(field, addr,			\
307 				 __stringify(field) "_" __stringify(addr))
309 #define MDIO_BUS_STATS_ADDR_ATTR_GROUP_DECL(addr)			\  argument
310 	MDIO_BUS_STATS_ADDR_ATTR(transfers, addr);			\
311 	MDIO_BUS_STATS_ADDR_ATTR(errors, addr);				\
312 	MDIO_BUS_STATS_ADDR_ATTR(writes, addr);				\
313 	MDIO_BUS_STATS_ADDR_ATTR(reads, addr)				\
348 #define MDIO_BUS_STATS_ADDR_ATTR_GROUP(addr)				\  argument
349 	&dev_attr_mdio_bus_addr_transfers_##addr.attr.attr,		\
350 	&dev_attr_mdio_bus_addr_errors_##addr.attr.attr,		\
351 	&dev_attr_mdio_bus_addr_writes_##addr.attr.attr,		\
352 	&dev_attr_mdio_bus_addr_reads_##addr.attr.attr			\
411  * mdio_find_bus - Given the name of a mdiobus, find the mii_bus.
416  * and this must be put_deviced'ed once the bus is finished with.
429  * of_mdio_find_bus - Given an mii_bus node, find the mii_bus.
434  * and this must be put once the bus is finished with.
453 /* Walk the list of subnodes of a mdio bus and look for a node that
456  * auto-probed phy devices to be supplied with information passed in
459 static void of_mdiobus_link_mdiodev(struct mii_bus *bus,  in of_mdiobus_link_mdiodev()  argument
462 	struct device *dev = &mdiodev->dev;  in of_mdiobus_link_mdiodev()
465 	if (dev->of_node || !bus->dev.of_node)  in of_mdiobus_link_mdiodev()
468 	for_each_available_child_of_node(bus->dev.of_node, child) {  in of_mdiobus_link_mdiodev()
469 		int addr;  in of_mdiobus_link_mdiodev()  local
471 		addr = of_mdio_parse_addr(dev, child);  in of_mdiobus_link_mdiodev()
472 		if (addr < 0)  in of_mdiobus_link_mdiodev()
475 		if (addr == mdiodev->addr) {  in of_mdiobus_link_mdiodev()
492  * mdiobus_create_device - create a full MDIO device given
494  * @bus: MDIO bus to create the devices on
499 static int mdiobus_create_device(struct mii_bus *bus,  in mdiobus_create_device()  argument
505 	mdiodev = mdio_device_create(bus, bi->mdio_addr);  in mdiobus_create_device()
507 		return -ENODEV;  in mdiobus_create_device()
509 	strncpy(mdiodev->modalias, bi->modalias,  in mdiobus_create_device()
510 		sizeof(mdiodev->modalias));  in mdiobus_create_device()
511 	mdiodev->bus_match = mdio_device_bus_match;  in mdiobus_create_device()
512 	mdiodev->dev.platform_data = (void *)bi->platform_data;  in mdiobus_create_device()
521 static struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr, bool c45)  in mdiobus_scan()  argument
523 	struct phy_device *phydev = ERR_PTR(-ENODEV);  in mdiobus_scan()
526 	phydev = get_phy_device(bus, addr, c45);  in mdiobus_scan()
530 	/* For DT, see if the auto-probed phy has a corresponding child  in mdiobus_scan()
531 	 * in the bus node, and set the of_node pointer in this case.  in mdiobus_scan()
533 	of_mdiobus_link_mdiodev(bus, &phydev->mdio);  in mdiobus_scan()
538 		return ERR_PTR(-ENODEV);  in mdiobus_scan()
545  * mdiobus_scan_c22 - scan one address on a bus for C22 MDIO devices.
546  * @bus: mii_bus to scan
547  * @addr: address on bus to scan
549  * This function scans one address on the MDIO bus, looking for
556 struct phy_device *mdiobus_scan_c22(struct mii_bus *bus, int addr)  in mdiobus_scan_c22()  argument
558 	return mdiobus_scan(bus, addr, false);  in mdiobus_scan_c22()
563  * mdiobus_scan_c45 - scan one address on a bus for C45 MDIO devices.
564  * @bus: mii_bus to scan
565  * @addr: address on bus to scan
567  * This function scans one address on the MDIO bus, looking for
574 static struct phy_device *mdiobus_scan_c45(struct mii_bus *bus, int addr)  in mdiobus_scan_c45()  argument
576 	return mdiobus_scan(bus, addr, true);  in mdiobus_scan_c45()
579 static int mdiobus_scan_bus_c22(struct mii_bus *bus)  in mdiobus_scan_bus_c22()  argument
584 		if ((bus->phy_mask & BIT(i)) == 0) {  in mdiobus_scan_bus_c22()
587 			phydev = mdiobus_scan_c22(bus, i);  in mdiobus_scan_bus_c22()
588 			if (IS_ERR(phydev) && (PTR_ERR(phydev) != -ENODEV))  in mdiobus_scan_bus_c22()
595 static int mdiobus_scan_bus_c45(struct mii_bus *bus)  in mdiobus_scan_bus_c45()  argument
600 		if ((bus->phy_mask & BIT(i)) == 0) {  in mdiobus_scan_bus_c45()
604 			if (bus->mdio_map[i])  in mdiobus_scan_bus_c45()
607 			phydev = mdiobus_scan_c45(bus, i);  in mdiobus_scan_bus_c45()
608 			if (IS_ERR(phydev) && (PTR_ERR(phydev) != -ENODEV))  in mdiobus_scan_bus_c45()
616  * transaction on the bus, like accepting a read themselves, and
622 static bool mdiobus_prevent_c45_scan(struct mii_bus *bus)  in mdiobus_prevent_c45_scan()  argument
630 		phydev = mdiobus_get_phy(bus, i);  in mdiobus_prevent_c45_scan()
633 		oui = phydev->phy_id >> 10;  in mdiobus_prevent_c45_scan()
642  * __mdiobus_register - bring up all the PHYs on a given bus and attach them to bus
643  * @bus: target mii_bus
644  * @owner: module containing bus accessor functions
646  * Description: Called by a bus driver to bring up all the PHYs
647  *   on a given bus, and attach them to the bus. Drivers should use
655 int __mdiobus_register(struct mii_bus *bus, struct module *owner)  in __mdiobus_register()  argument
662 	if (!bus || !bus->name)  in __mdiobus_register()
663 		return -EINVAL;  in __mdiobus_register()
666 	if (!!bus->read != !!bus->write || !!bus->read_c45 != !!bus->write_c45)  in __mdiobus_register()
667 		return -EINVAL;  in __mdiobus_register()
670 	if (!bus->read && !bus->read_c45)  in __mdiobus_register()
671 		return -EINVAL;  in __mdiobus_register()
673 	if (bus->parent && bus->parent->of_node)  in __mdiobus_register()
674 		bus->parent->of_node->fwnode.flags |=  in __mdiobus_register()
677 	WARN(bus->state != MDIOBUS_ALLOCATED &&  in __mdiobus_register()
678 	     bus->state != MDIOBUS_UNREGISTERED,  in __mdiobus_register()
679 	     "%s: not in ALLOCATED or UNREGISTERED state\n", bus->id);  in __mdiobus_register()
681 	bus->owner = owner;  in __mdiobus_register()
682 	bus->dev.parent = bus->parent;  in __mdiobus_register()
683 	bus->dev.class = &mdio_bus_class;  in __mdiobus_register()
684 	bus->dev.groups = NULL;  in __mdiobus_register()
685 	dev_set_name(&bus->dev, "%s", bus->id);  in __mdiobus_register()
692 	bus->state = MDIOBUS_UNREGISTERED;  in __mdiobus_register()
694 	err = device_register(&bus->dev);  in __mdiobus_register()
696 		pr_err("mii_bus %s failed to register\n", bus->id);  in __mdiobus_register()
697 		return -EINVAL;  in __mdiobus_register()
700 	mutex_init(&bus->mdio_lock);  in __mdiobus_register()
701 	mutex_init(&bus->shared_lock);  in __mdiobus_register()
703 	/* assert bus level PHY GPIO reset */  in __mdiobus_register()
704 	gpiod = devm_gpiod_get_optional(&bus->dev, "reset", GPIOD_OUT_HIGH);  in __mdiobus_register()
706 		err = dev_err_probe(&bus->dev, PTR_ERR(gpiod),  in __mdiobus_register()
708 				    bus->id);  in __mdiobus_register()
709 		device_del(&bus->dev);  in __mdiobus_register()
712 		bus->reset_gpiod = gpiod;  in __mdiobus_register()
713 		fsleep(bus->reset_delay_us);  in __mdiobus_register()
715 		if (bus->reset_post_delay_us > 0)  in __mdiobus_register()
716 			fsleep(bus->reset_post_delay_us);  in __mdiobus_register()
719 	if (bus->reset) {  in __mdiobus_register()
720 		err = bus->reset(bus);  in __mdiobus_register()
725 	if (bus->read) {  in __mdiobus_register()
726 		err = mdiobus_scan_bus_c22(bus);  in __mdiobus_register()
731 	prevent_c45_scan = mdiobus_prevent_c45_scan(bus);  in __mdiobus_register()
733 	if (!prevent_c45_scan && bus->read_c45) {  in __mdiobus_register()
734 		err = mdiobus_scan_bus_c45(bus);  in __mdiobus_register()
739 	mdiobus_setup_mdiodev_from_board_info(bus, mdiobus_create_device);  in __mdiobus_register()
741 	bus->state = MDIOBUS_REGISTERED;  in __mdiobus_register()
742 	dev_dbg(&bus->dev, "probed\n");  in __mdiobus_register()
747 		mdiodev = bus->mdio_map[i];  in __mdiobus_register()
751 		mdiodev->device_remove(mdiodev);  in __mdiobus_register()
752 		mdiodev->device_free(mdiodev);  in __mdiobus_register()
756 	if (bus->reset_gpiod)  in __mdiobus_register()
757 		gpiod_set_value_cansleep(bus->reset_gpiod, 1);  in __mdiobus_register()
759 	device_del(&bus->dev);  in __mdiobus_register()
764 void mdiobus_unregister(struct mii_bus *bus)  in mdiobus_unregister()  argument
769 	if (WARN_ON_ONCE(bus->state != MDIOBUS_REGISTERED))  in mdiobus_unregister()
771 	bus->state = MDIOBUS_UNREGISTERED;  in mdiobus_unregister()
774 		mdiodev = bus->mdio_map[i];  in mdiobus_unregister()
778 		if (mdiodev->reset_gpio)  in mdiobus_unregister()
779 			gpiod_put(mdiodev->reset_gpio);  in mdiobus_unregister()
781 		mdiodev->device_remove(mdiodev);  in mdiobus_unregister()
782 		mdiodev->device_free(mdiodev);  in mdiobus_unregister()
786 	if (bus->reset_gpiod)  in mdiobus_unregister()
787 		gpiod_set_value_cansleep(bus->reset_gpiod, 1);  in mdiobus_unregister()
789 	device_del(&bus->dev);  in mdiobus_unregister()
794  * mdiobus_free - free a struct mii_bus
795  * @bus: mii_bus to free
801 void mdiobus_free(struct mii_bus *bus)  in mdiobus_free()  argument
804 	if (bus->state == MDIOBUS_ALLOCATED) {  in mdiobus_free()
805 		kfree(bus);  in mdiobus_free()
809 	WARN(bus->state != MDIOBUS_UNREGISTERED,  in mdiobus_free()
810 	     "%s: not in UNREGISTERED state\n", bus->id);  in mdiobus_free()
811 	bus->state = MDIOBUS_RELEASED;  in mdiobus_free()
813 	put_device(&bus->dev);  in mdiobus_free()
820 	u64_stats_update_begin(&stats->syncp);  in mdiobus_stats_acct()
822 	u64_stats_inc(&stats->transfers);  in mdiobus_stats_acct()
824 		u64_stats_inc(&stats->errors);  in mdiobus_stats_acct()
829 		u64_stats_inc(&stats->reads);  in mdiobus_stats_acct()
831 		u64_stats_inc(&stats->writes);  in mdiobus_stats_acct()
833 	u64_stats_update_end(&stats->syncp);  in mdiobus_stats_acct()
838  * __mdiobus_read - Unlocked version of the mdiobus_read function
839  * @bus: the mii_bus struct
840  * @addr: the phy address
843  * Read a MDIO bus register. Caller must hold the mdio bus lock.
847 int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum)  in __mdiobus_read()  argument
851 	lockdep_assert_held_once(&bus->mdio_lock);  in __mdiobus_read()
853 	if (bus->read)  in __mdiobus_read()
854 		retval = bus->read(bus, addr, regnum);  in __mdiobus_read()
856 		retval = -EOPNOTSUPP;  in __mdiobus_read()
858 	trace_mdio_access(bus, 1, addr, regnum, retval, retval);  in __mdiobus_read()
859 	mdiobus_stats_acct(&bus->stats[addr], true, retval);  in __mdiobus_read()
866  * __mdiobus_write - Unlocked version of the mdiobus_write function
867  * @bus: the mii_bus struct
868  * @addr: the phy address
872  * Write a MDIO bus register. Caller must hold the mdio bus lock.
876 int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val)  in __mdiobus_write()  argument
880 	lockdep_assert_held_once(&bus->mdio_lock);  in __mdiobus_write()
882 	if (bus->write)  in __mdiobus_write()
883 		err = bus->write(bus, addr, regnum, val);  in __mdiobus_write()
885 		err = -EOPNOTSUPP;  in __mdiobus_write()
887 	trace_mdio_access(bus, 0, addr, regnum, val, err);  in __mdiobus_write()
888 	mdiobus_stats_acct(&bus->stats[addr], false, err);  in __mdiobus_write()
895  * __mdiobus_modify_changed - Unlocked version of the mdiobus_modify function
896  * @bus: the mii_bus struct
897  * @addr: the phy address
907 int __mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,  in __mdiobus_modify_changed()  argument
912 	ret = __mdiobus_read(bus, addr, regnum);  in __mdiobus_modify_changed()
920 	ret = __mdiobus_write(bus, addr, regnum, new);  in __mdiobus_modify_changed()
927  * __mdiobus_c45_read - Unlocked version of the mdiobus_c45_read function
928  * @bus: the mii_bus struct
929  * @addr: the phy address
933  * Read a MDIO bus register. Caller must hold the mdio bus lock.
937 int __mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum)  in __mdiobus_c45_read()  argument
941 	lockdep_assert_held_once(&bus->mdio_lock);  in __mdiobus_c45_read()
943 	if (bus->read_c45)  in __mdiobus_c45_read()
944 		retval = bus->read_c45(bus, addr, devad, regnum);  in __mdiobus_c45_read()
946 		retval = -EOPNOTSUPP;  in __mdiobus_c45_read()
948 	trace_mdio_access(bus, 1, addr, regnum, retval, retval);  in __mdiobus_c45_read()
949 	mdiobus_stats_acct(&bus->stats[addr], true, retval);  in __mdiobus_c45_read()
956  * __mdiobus_c45_write - Unlocked version of the mdiobus_write function
957  * @bus: the mii_bus struct
958  * @addr: the phy address
963  * Write a MDIO bus register. Caller must hold the mdio bus lock.
967 int __mdiobus_c45_write(struct mii_bus *bus, int addr, int devad, u32 regnum,  in __mdiobus_c45_write()  argument
972 	lockdep_assert_held_once(&bus->mdio_lock);  in __mdiobus_c45_write()
974 	if (bus->write_c45)  in __mdiobus_c45_write()
975 		err = bus->write_c45(bus, addr, devad, regnum, val);  in __mdiobus_c45_write()
977 		err = -EOPNOTSUPP;  in __mdiobus_c45_write()
979 	trace_mdio_access(bus, 0, addr, regnum, val, err);  in __mdiobus_c45_write()
980 	mdiobus_stats_acct(&bus->stats[addr], false, err);  in __mdiobus_c45_write()
987  * __mdiobus_c45_modify_changed - Unlocked version of the mdiobus_modify function
988  * @bus: the mii_bus struct
989  * @addr: the phy address
1000 static int __mdiobus_c45_modify_changed(struct mii_bus *bus, int addr,  in __mdiobus_c45_modify_changed()  argument
1006 	ret = __mdiobus_c45_read(bus, addr, devad, regnum);  in __mdiobus_c45_modify_changed()
1014 	ret = __mdiobus_c45_write(bus, addr, devad, regnum, new);  in __mdiobus_c45_modify_changed()
1020  * mdiobus_read_nested - Nested version of the mdiobus_read function
1021  * @bus: the mii_bus struct
1022  * @addr: the phy address
1025  * In case of nested MDIO bus access avoid lockdep false positives by
1029  * because the bus read/write functions may wait for an interrupt
1032 int mdiobus_read_nested(struct mii_bus *bus, int addr, u32 regnum)  in mdiobus_read_nested()  argument
1036 	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);  in mdiobus_read_nested()
1037 	retval = __mdiobus_read(bus, addr, regnum);  in mdiobus_read_nested()
1038 	mutex_unlock(&bus->mdio_lock);  in mdiobus_read_nested()
1045  * mdiobus_read - Convenience function for reading a given MII mgmt register
1046  * @bus: the mii_bus struct
1047  * @addr: the phy address
1051  * because the bus read/write functions may wait for an interrupt
1054 int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum)  in mdiobus_read()  argument
1058 	mutex_lock(&bus->mdio_lock);  in mdiobus_read()
1059 	retval = __mdiobus_read(bus, addr, regnum);  in mdiobus_read()
1060 	mutex_unlock(&bus->mdio_lock);  in mdiobus_read()
1067  * mdiobus_c45_read - Convenience function for reading a given MII mgmt register
1068  * @bus: the mii_bus struct
1069  * @addr: the phy address
1074  * because the bus read/write functions may wait for an interrupt
1077 int mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum)  in mdiobus_c45_read()  argument
1081 	mutex_lock(&bus->mdio_lock);  in mdiobus_c45_read()
1082 	retval = __mdiobus_c45_read(bus, addr, devad, regnum);  in mdiobus_c45_read()
1083 	mutex_unlock(&bus->mdio_lock);  in mdiobus_c45_read()
1090  * mdiobus_c45_read_nested - Nested version of the mdiobus_c45_read function
1091  * @bus: the mii_bus struct
1092  * @addr: the phy address
1096  * In case of nested MDIO bus access avoid lockdep false positives by
1100  * because the bus read/write functions may wait for an interrupt
1103 int mdiobus_c45_read_nested(struct mii_bus *bus, int addr, int devad,  in mdiobus_c45_read_nested()  argument
1108 	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);  in mdiobus_c45_read_nested()
1109 	retval = __mdiobus_c45_read(bus, addr, devad, regnum);  in mdiobus_c45_read_nested()
1110 	mutex_unlock(&bus->mdio_lock);  in mdiobus_c45_read_nested()
1117  * mdiobus_write_nested - Nested version of the mdiobus_write function
1118  * @bus: the mii_bus struct
1119  * @addr: the phy address
1123  * In case of nested MDIO bus access avoid lockdep false positives by
1127  * because the bus read/write functions may wait for an interrupt
1130 int mdiobus_write_nested(struct mii_bus *bus, int addr, u32 regnum, u16 val)  in mdiobus_write_nested()  argument
1134 	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);  in mdiobus_write_nested()
1135 	err = __mdiobus_write(bus, addr, regnum, val);  in mdiobus_write_nested()
1136 	mutex_unlock(&bus->mdio_lock);  in mdiobus_write_nested()
1143  * mdiobus_write - Convenience function for writing a given MII mgmt register
1144  * @bus: the mii_bus struct
1145  * @addr: the phy address
1150  * because the bus read/write functions may wait for an interrupt
1153 int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val)  in mdiobus_write()  argument
1157 	mutex_lock(&bus->mdio_lock);  in mdiobus_write()
1158 	err = __mdiobus_write(bus, addr, regnum, val);  in mdiobus_write()
1159 	mutex_unlock(&bus->mdio_lock);  in mdiobus_write()
1166  * mdiobus_c45_write - Convenience function for writing a given MII mgmt register
1167  * @bus: the mii_bus struct
1168  * @addr: the phy address
1174  * because the bus read/write functions may wait for an interrupt
1177 int mdiobus_c45_write(struct mii_bus *bus, int addr, int devad, u32 regnum,  in mdiobus_c45_write()  argument
1182 	mutex_lock(&bus->mdio_lock);  in mdiobus_c45_write()
1183 	err = __mdiobus_c45_write(bus, addr, devad, regnum, val);  in mdiobus_c45_write()
1184 	mutex_unlock(&bus->mdio_lock);  in mdiobus_c45_write()
1191  * mdiobus_c45_write_nested - Nested version of the mdiobus_c45_write function
1192  * @bus: the mii_bus struct
1193  * @addr: the phy address
1198  * In case of nested MDIO bus access avoid lockdep false positives by
1202  * because the bus read/write functions may wait for an interrupt
1205 int mdiobus_c45_write_nested(struct mii_bus *bus, int addr, int devad,  in mdiobus_c45_write_nested()  argument
1210 	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);  in mdiobus_c45_write_nested()
1211 	err = __mdiobus_c45_write(bus, addr, devad, regnum, val);  in mdiobus_c45_write_nested()
1212 	mutex_unlock(&bus->mdio_lock);  in mdiobus_c45_write_nested()
1219  * __mdiobus_modify - Convenience function for modifying a given mdio device
1221  * @bus: the mii_bus struct
1222  * @addr: the phy address
1227 int __mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask,  in __mdiobus_modify()  argument
1232 	err = __mdiobus_modify_changed(bus, addr, regnum, mask, set);  in __mdiobus_modify()
1239  * mdiobus_modify - Convenience function for modifying a given mdio device
1241  * @bus: the mii_bus struct
1242  * @addr: the phy address
1247 int mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask, u16 set)  in mdiobus_modify()  argument
1251 	mutex_lock(&bus->mdio_lock);  in mdiobus_modify()
1252 	err = __mdiobus_modify(bus, addr, regnum, mask, set);  in mdiobus_modify()
1253 	mutex_unlock(&bus->mdio_lock);  in mdiobus_modify()
1260  * mdiobus_c45_modify - Convenience function for modifying a given mdio device
1262  * @bus: the mii_bus struct
1263  * @addr: the phy address
1269 int mdiobus_c45_modify(struct mii_bus *bus, int addr, int devad, u32 regnum,  in mdiobus_c45_modify()  argument
1274 	mutex_lock(&bus->mdio_lock);  in mdiobus_c45_modify()
1275 	err = __mdiobus_c45_modify_changed(bus, addr, devad, regnum,  in mdiobus_c45_modify()
1277 	mutex_unlock(&bus->mdio_lock);  in mdiobus_c45_modify()
1284  * mdiobus_modify_changed - Convenience function for modifying a given mdio
1286  * @bus: the mii_bus struct
1287  * @addr: the phy address
1292 int mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,  in mdiobus_modify_changed()  argument
1297 	mutex_lock(&bus->mdio_lock);  in mdiobus_modify_changed()
1298 	err = __mdiobus_modify_changed(bus, addr, regnum, mask, set);  in mdiobus_modify_changed()
1299 	mutex_unlock(&bus->mdio_lock);  in mdiobus_modify_changed()
1306  * mdiobus_c45_modify_changed - Convenience function for modifying a given mdio
1308  * @bus: the mii_bus struct
1309  * @addr: the phy address
1315 int mdiobus_c45_modify_changed(struct mii_bus *bus, int addr, int devad,  in mdiobus_c45_modify_changed()  argument
1320 	mutex_lock(&bus->mdio_lock);  in mdiobus_c45_modify_changed()
1321 	err = __mdiobus_c45_modify_changed(bus, addr, devad, regnum, mask, set);  in mdiobus_c45_modify_changed()
1322 	mutex_unlock(&bus->mdio_lock);  in mdiobus_c45_modify_changed()
1329  * mdio_bus_match - determine if given MDIO driver supports the given
1344 	/* Both the driver and device must type-match */  in mdio_bus_match()
1345 	if (!(mdiodrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY) !=  in mdio_bus_match()
1346 	    !(mdio->flags & MDIO_DEVICE_FLAG_PHY))  in mdio_bus_match()
1352 	if (mdio->bus_match)  in mdio_bus_match()
1353 		return mdio->bus_match(dev, drv);  in mdio_bus_match()
1362 	/* Some devices have extra OF data and an OF-style MODALIAS */  in mdio_uevent()
1364 	if (rc != -ENODEV)  in mdio_uevent()
1421 MODULE_DESCRIPTION("MDIO bus/device layer");