diff options
Diffstat (limited to 'include/linux/of_mdio.h')
| -rw-r--r-- | include/linux/of_mdio.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/include/linux/of_mdio.h b/include/linux/of_mdio.h new file mode 100644 index 000000000..8a52ef2e6 --- /dev/null +++ b/include/linux/of_mdio.h @@ -0,0 +1,154 @@ +/* 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, + struct module *owner); + +static inline int of_mdiobus_register(struct mii_bus *mdio, + struct device_node *np) +{ + return __of_mdiobus_register(mdio, np, THIS_MODULE); +} + +int __devm_of_mdiobus_register(struct device *dev, struct mii_bus *mdio, + struct device_node *np, struct module *owner); + +static inline int devm_of_mdiobus_register(struct device *dev, + struct mii_bus *mdio, + struct device_node *np) +{ + return __devm_of_mdiobus_register(dev, mdio, np, THIS_MODULE); +} + +struct mdio_device *of_mdio_find_device(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 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 int devm_of_mdiobus_register(struct device *dev, + struct mii_bus *mdio, + struct device_node *np) +{ + return devm_mdiobus_register(dev, mdio); +} + +static inline struct mdio_device *of_mdio_find_device(struct device_node *np) +{ + return NULL; +} + +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 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 */ |