[mirror_ubuntu-bionic-kernel.git] / include / linux / of_mdio.h

/*
 * OF helpers for the MDIO (Ethernet PHY) API
 *
 * Copyright (c) 2009 Secret Lab Technologies, Ltd.
 *
 * This file is released under the GPLv2
 */

#ifndef __LINUX_OF_MDIO_H
#define __LINUX_OF_MDIO_H

#include <linux/phy.h>
#include <linux/of.h>

#if IS_ENABLED(CONFIG_OF_MDIO)
extern int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np);
extern struct phy_device *of_phy_find_device(struct device_node *phy_np);
extern 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);
extern 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);

extern struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
extern int of_phy_register_fixed_link(struct device_node *np);
extern void of_phy_deregister_fixed_link(struct device_node *np);
extern bool of_phy_is_fixed_link(struct device_node *np);


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 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;
}
#endif


#endif /* __LINUX_OF_MDIO_H */
Commit	Line	Data
8bc487d1 GL	1	/*
	2	* OF helpers for the MDIO (Ethernet PHY) API
	3	*
	4	* Copyright (c) 2009 Secret Lab Technologies, Ltd.
	5	*
	6	* This file is released under the GPLv2
	7	*/
	8
	9	#ifndef __LINUX_OF_MDIO_H
	10	#define __LINUX_OF_MDIO_H
	11
	12	#include <linux/phy.h>
	13	#include <linux/of.h>
	14
e6e14f63	15	#if IS_ENABLED(CONFIG_OF_MDIO)
8bc487d1 GL	16	extern int of_mdiobus_register(struct mii_bus mdio, struct device_node np);
	17	extern struct phy_device of_phy_find_device(struct device_node phy_np);
	18	extern struct phy_device of_phy_connect(struct net_device dev,
	19	struct device_node *phy_np,
	20	void (hndlr)(struct net_device ),
	21	u32 flags, phy_interface_t iface);
b7862412 DL	22	extern struct phy_device *
	23	of_phy_get_and_connect(struct net_device dev, struct device_node np,
	24	void (hndlr)(struct net_device ));
7614aba6 AF	25	struct phy_device of_phy_attach(struct net_device dev,
	26	struct device_node *phy_np, u32 flags,
	27	phy_interface_t iface);
8bc487d1	28
25106022	29	extern struct mii_bus of_mdio_find_bus(struct device_node mdio_np);
a5e4bd99	30	extern int of_phy_register_fixed_link(struct device_node *np);
3f65047c	31	extern void of_phy_deregister_fixed_link(struct device_node *np);
a5e4bd99	32	extern bool of_phy_is_fixed_link(struct device_node *np);
25106022	33
4798a714 JM	34
	35	static inline int of_mdio_parse_addr(struct device *dev,
	36	const struct device_node *np)
	37	{
	38	u32 addr;
	39	int ret;
	40
	41	ret = of_property_read_u32(np, "reg", &addr);
	42	if (ret < 0) {
	43	dev_err(dev, "%s has invalid PHY address\n", np->full_name);
	44	return ret;
	45	}
	46
	47	/* A PHY must have a reg property in the range [0-31] */
	48	if (addr >= PHY_MAX_ADDR) {
	49	dev_err(dev, "%s PHY address %i is too large\n",
	50	np->full_name, addr);
	51	return -EINVAL;
	52	}
	53
	54	return addr;
	55	}
	56
e6e14f63	57	#else /* CONFIG_OF_MDIO */
2a5cf801	58	static inline int of_mdiobus_register(struct mii_bus mdio, struct device_node np)
f9dc9ac5	59	{
23a456f0 DM	60	/*
	61	* Fall back to the non-DT function to register a bus.
	62	* This way, we don't have to keep compat bits around in drivers.
	63	*/
	64
	65	return mdiobus_register(mdio);
f9dc9ac5 SK	66	}
f9dc9ac5 SK	67
2a5cf801	68	static inline struct phy_device of_phy_find_device(struct device_node phy_np)
f9dc9ac5 SK	69	{
	70	return NULL;
	71	}
	72
2a5cf801 MB	73	static inline struct phy_device of_phy_connect(struct net_device dev,
	74	struct device_node *phy_np,
	75	void (hndlr)(struct net_device ),
	76	u32 flags, phy_interface_t iface)
f9dc9ac5 SK	77	{
	78	return NULL;
	79	}
	80
b7862412 DL	81	static inline struct phy_device *
	82	of_phy_get_and_connect(struct net_device dev, struct device_node np,
	83	void (hndlr)(struct net_device ))
	84	{
	85	return NULL;
	86	}
	87
7614aba6 AF	88	static inline struct phy_device of_phy_attach(struct net_device dev,
	89	struct device_node *phy_np,
	90	u32 flags, phy_interface_t iface)
	91	{
	92	return NULL;
	93	}
	94
2a5cf801	95	static inline struct mii_bus of_mdio_find_bus(struct device_node mdio_np)
f9dc9ac5 SK	96	{
	97	return NULL;
	98	}
33d67377 FF	99
	100	static inline int of_mdio_parse_addr(struct device *dev,
	101	const struct device_node *np)
	102	{
	103	return -ENOSYS;
	104	}
3be2a49e TP	105	static inline int of_phy_register_fixed_link(struct device_node *np)
	106	{
	107	return -ENOSYS;
	108	}
3f65047c JH	109	static inline void of_phy_deregister_fixed_link(struct device_node *np)
	110	{
	111	}
3be2a49e TP	112	static inline bool of_phy_is_fixed_link(struct device_node *np)
	113	{
	114	return false;
	115	}
	116	#endif
	117
	118
8bc487d1	119	#endif /* __LINUX_OF_MDIO_H */