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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* OF helpers for the MDIO (Ethernet PHY) API
*
* Copyright (c) 2009 Secret Lab Technologies, Ltd.
*/
#ifndef __LINUX_OF_MDIO_H
#define __LINUX_OF_MDIO_H
#include <linux/device.h>
#include <linux/phy.h>
#include <linux/of.h>
#if IS_ENABLED(CONFIG_OF_MDIO)
bool of_mdiobus_child_is_phy(struct device_node *child);
int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np);
int devm_of_mdiobus_register(struct device *dev, struct mii_bus *mdio,
struct device_node *np);
struct phy_device *of_phy_find_device(struct device_node *phy_np);
struct phy_device *
of_phy_connect(struct net_device *dev, struct device_node *phy_np,
void (*hndlr)(struct net_device *), u32 flags,
phy_interface_t iface);
struct phy_device *
of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
void (*hndlr)(struct net_device *));
struct phy_device *
of_phy_attach(struct net_device *dev, struct device_node *phy_np,
u32 flags, phy_interface_t iface);
struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
int of_phy_register_fixed_link(struct device_node *np);
void of_phy_deregister_fixed_link(struct device_node *np);
bool of_phy_is_fixed_link(struct device_node *np);
int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,
struct device_node *child, u32 addr);
static inline int of_mdio_parse_addr(struct device *dev,
const struct device_node *np)
{
u32 addr;
int ret;
ret = of_property_read_u32(np, "reg", &addr);
if (ret < 0) {
dev_err(dev, "%s has invalid PHY address\n", np->full_name);
return ret;
}
/* A PHY must have a reg property in the range [0-31] */
if (addr >= PHY_MAX_ADDR) {
dev_err(dev, "%s PHY address %i is too large\n",
np->full_name, addr);
return -EINVAL;
}
return addr;
}
#else /* CONFIG_OF_MDIO */
static inline bool of_mdiobus_child_is_phy(struct device_node *child)
{
return false;
}
static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
{
/*
* Fall back to the non-DT function to register a bus.
* This way, we don't have to keep compat bits around in drivers.
*/
return mdiobus_register(mdio);
}
static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)
{
return NULL;
}
static inline struct phy_device *of_phy_connect(struct net_device *dev,
struct device_node *phy_np,
void (*hndlr)(struct net_device *),
u32 flags, phy_interface_t iface)
{
return NULL;
}
static inline struct phy_device *
of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
void (*hndlr)(struct net_device *))
{
return NULL;
}
static inline struct phy_device *of_phy_attach(struct net_device *dev,
struct device_node *phy_np,
u32 flags, phy_interface_t iface)
{
return NULL;
}
static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
{
return NULL;
}
static inline int of_mdio_parse_addr(struct device *dev,
const struct device_node *np)
{
return -ENOSYS;
}
static inline int of_phy_register_fixed_link(struct device_node *np)
{
return -ENOSYS;
}
static inline void of_phy_deregister_fixed_link(struct device_node *np)
{
}
static inline bool of_phy_is_fixed_link(struct device_node *np)
{
return false;
}
static inline int of_mdiobus_phy_device_register(struct mii_bus *mdio,
struct phy_device *phy,
struct device_node *child, u32 addr)
{
return -ENOSYS;
}
#endif
#endif /* __LINUX_OF_MDIO_H */
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