forked from mirrors/linux
5972157c2d
This function will be needed in tja11xx driver for secondary PHY support. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* OF helpers for the MDIO (Ethernet PHY) API
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*
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* Copyright (c) 2009 Secret Lab Technologies, Ltd.
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*/
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#ifndef __LINUX_OF_MDIO_H
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#define __LINUX_OF_MDIO_H
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#include <linux/phy.h>
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#include <linux/of.h>
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#if IS_ENABLED(CONFIG_OF_MDIO)
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extern bool of_mdiobus_child_is_phy(struct device_node *child);
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extern int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np);
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extern struct phy_device *of_phy_find_device(struct device_node *phy_np);
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extern struct phy_device *of_phy_connect(struct net_device *dev,
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struct device_node *phy_np,
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void (*hndlr)(struct net_device *),
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u32 flags, phy_interface_t iface);
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extern struct phy_device *
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of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
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void (*hndlr)(struct net_device *));
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struct phy_device *of_phy_attach(struct net_device *dev,
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struct device_node *phy_np, u32 flags,
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phy_interface_t iface);
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extern struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
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extern int of_phy_register_fixed_link(struct device_node *np);
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extern void of_phy_deregister_fixed_link(struct device_node *np);
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extern bool of_phy_is_fixed_link(struct device_node *np);
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extern int of_mdiobus_phy_device_register(struct mii_bus *mdio,
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struct phy_device *phy,
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struct device_node *child, u32 addr);
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static inline int of_mdio_parse_addr(struct device *dev,
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const struct device_node *np)
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{
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u32 addr;
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int ret;
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ret = of_property_read_u32(np, "reg", &addr);
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if (ret < 0) {
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dev_err(dev, "%s has invalid PHY address\n", np->full_name);
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return ret;
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}
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/* A PHY must have a reg property in the range [0-31] */
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if (addr >= PHY_MAX_ADDR) {
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dev_err(dev, "%s PHY address %i is too large\n",
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np->full_name, addr);
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return -EINVAL;
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}
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return addr;
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}
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#else /* CONFIG_OF_MDIO */
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static inline bool of_mdiobus_child_is_phy(struct device_node *child)
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{
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return false;
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}
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static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
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{
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/*
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* Fall back to the non-DT function to register a bus.
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* This way, we don't have to keep compat bits around in drivers.
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*/
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return mdiobus_register(mdio);
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}
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static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)
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{
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return NULL;
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}
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static inline struct phy_device *of_phy_connect(struct net_device *dev,
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struct device_node *phy_np,
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void (*hndlr)(struct net_device *),
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u32 flags, phy_interface_t iface)
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{
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return NULL;
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}
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static inline struct phy_device *
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of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
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void (*hndlr)(struct net_device *))
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{
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return NULL;
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}
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static inline struct phy_device *of_phy_attach(struct net_device *dev,
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struct device_node *phy_np,
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u32 flags, phy_interface_t iface)
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{
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return NULL;
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}
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static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
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{
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return NULL;
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}
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static inline int of_mdio_parse_addr(struct device *dev,
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const struct device_node *np)
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{
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return -ENOSYS;
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}
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static inline int of_phy_register_fixed_link(struct device_node *np)
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{
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return -ENOSYS;
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}
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static inline void of_phy_deregister_fixed_link(struct device_node *np)
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{
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}
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static inline bool of_phy_is_fixed_link(struct device_node *np)
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{
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return false;
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}
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static inline int of_mdiobus_phy_device_register(struct mii_bus *mdio,
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struct phy_device *phy,
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struct device_node *child, u32 addr)
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{
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return -ENOSYS;
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}
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#endif
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#endif /* __LINUX_OF_MDIO_H */
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