[mirror_ubuntu-focal-kernel.git] / include / linux / mdio.h

/*
 * linux/mdio.h: definitions for MDIO (clause 45) transceivers
 * Copyright 2006-2009 Solarflare Communications Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation, incorporated herein by reference.
 */
#ifndef __LINUX_MDIO_H__
#define __LINUX_MDIO_H__

#include <uapi/linux/mdio.h>
#include <linux/mod_devicetable.h>

struct gpio_desc;
struct mii_bus;

/* Multiple levels of nesting are possible. However typically this is
 * limited to nested DSA like layer, a MUX layer, and the normal
 * user. Instead of trying to handle the general case, just define
 * these cases.
 */
enum mdio_mutex_lock_class {
	MDIO_MUTEX_NORMAL,
	MDIO_MUTEX_MUX,
	MDIO_MUTEX_NESTED,
};

struct mdio_device {
	struct device dev;

	const struct dev_pm_ops *pm_ops;
	struct mii_bus *bus;
	char modalias[MDIO_NAME_SIZE];

	int (*bus_match)(struct device *dev, struct device_driver *drv);
	void (*device_free)(struct mdio_device *mdiodev);
	void (*device_remove)(struct mdio_device *mdiodev);

	/* Bus address of the MDIO device (0-31) */
	int addr;
	int flags;
	struct gpio_desc *reset;
	unsigned int reset_assert_delay;
	unsigned int reset_deassert_delay;
};
#define to_mdio_device(d) container_of(d, struct mdio_device, dev)

/* struct mdio_driver_common: Common to all MDIO drivers */
struct mdio_driver_common {
	struct device_driver driver;
	int flags;
};
#define MDIO_DEVICE_FLAG_PHY		1
#define to_mdio_common_driver(d) \
	container_of(d, struct mdio_driver_common, driver)

/* struct mdio_driver: Generic MDIO driver */
struct mdio_driver {
	struct mdio_driver_common mdiodrv;

	/*
	 * Called during discovery.  Used to set
	 * up device-specific structures, if any
	 */
	int (*probe)(struct mdio_device *mdiodev);

	/* Clears up any memory if needed */
	void (*remove)(struct mdio_device *mdiodev);
};
#define to_mdio_driver(d)						\
	container_of(to_mdio_common_driver(d), struct mdio_driver, mdiodrv)

void mdio_device_free(struct mdio_device *mdiodev);
struct mdio_device *mdio_device_create(struct mii_bus *bus, int addr);
int mdio_device_register(struct mdio_device *mdiodev);
void mdio_device_remove(struct mdio_device *mdiodev);
void mdio_device_reset(struct mdio_device *mdiodev, int value);
int mdio_driver_register(struct mdio_driver *drv);
void mdio_driver_unregister(struct mdio_driver *drv);
int mdio_device_bus_match(struct device *dev, struct device_driver *drv);

static inline bool mdio_phy_id_is_c45(int phy_id)
{
	return (phy_id & MDIO_PHY_ID_C45) && !(phy_id & ~MDIO_PHY_ID_C45_MASK);
}

static inline __u16 mdio_phy_id_prtad(int phy_id)
{
	return (phy_id & MDIO_PHY_ID_PRTAD) >> 5;
}

static inline __u16 mdio_phy_id_devad(int phy_id)
{
	return phy_id & MDIO_PHY_ID_DEVAD;
}

/**
 * struct mdio_if_info - Ethernet controller MDIO interface
 * @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown)
 * @mmds: Mask of MMDs expected to be present in the PHY.  This must be
 *	non-zero unless @prtad = %MDIO_PRTAD_NONE.
 * @mode_support: MDIO modes supported.  If %MDIO_SUPPORTS_C22 is set then
 *	MII register access will be passed through with @devad =
 *	%MDIO_DEVAD_NONE.  If %MDIO_EMULATE_C22 is set then access to
 *	commonly used clause 22 registers will be translated into
 *	clause 45 registers.
 * @dev: Net device structure
 * @mdio_read: Register read function; returns value or negative error code
 * @mdio_write: Register write function; returns 0 or negative error code
 */
struct mdio_if_info {
	int prtad;
	u32 mmds;
	unsigned mode_support;

	struct net_device *dev;
	int (*mdio_read)(struct net_device *dev, int prtad, int devad,
			 u16 addr);
	int (*mdio_write)(struct net_device *dev, int prtad, int devad,
			  u16 addr, u16 val);
};

#define MDIO_PRTAD_NONE			(-1)
#define MDIO_DEVAD_NONE			(-1)
#define MDIO_SUPPORTS_C22		1
#define MDIO_SUPPORTS_C45		2
#define MDIO_EMULATE_C22		4

struct ethtool_cmd;
struct ethtool_pauseparam;
extern int mdio45_probe(struct mdio_if_info *mdio, int prtad);
extern int mdio_set_flag(const struct mdio_if_info *mdio,
			 int prtad, int devad, u16 addr, int mask,
			 bool sense);
extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds);
extern int mdio45_nway_restart(const struct mdio_if_info *mdio);
extern void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
				      struct ethtool_cmd *ecmd,
				      u32 npage_adv, u32 npage_lpa);
extern void
mdio45_ethtool_ksettings_get_npage(const struct mdio_if_info *mdio,
				   struct ethtool_link_ksettings *cmd,
				   u32 npage_adv, u32 npage_lpa);

/**
 * mdio45_ethtool_gset - get settings for ETHTOOL_GSET
 * @mdio: MDIO interface
 * @ecmd: Ethtool request structure
 *
 * Since the CSRs for auto-negotiation using next pages are not fully
 * standardised, this function does not attempt to decode them.  Use
 * mdio45_ethtool_gset_npage() to specify advertisement bits from next
 * pages.
 */
static inline void mdio45_ethtool_gset(const struct mdio_if_info *mdio,
				       struct ethtool_cmd *ecmd)
{
	mdio45_ethtool_gset_npage(mdio, ecmd, 0, 0);
}

/**
 * mdio45_ethtool_ksettings_get - get settings for ETHTOOL_GLINKSETTINGS
 * @mdio: MDIO interface
 * @cmd: Ethtool request structure
 *
 * Since the CSRs for auto-negotiation using next pages are not fully
 * standardised, this function does not attempt to decode them.  Use
 * mdio45_ethtool_ksettings_get_npage() to specify advertisement bits
 * from next pages.
 */
static inline void
mdio45_ethtool_ksettings_get(const struct mdio_if_info *mdio,
			     struct ethtool_link_ksettings *cmd)
{
	mdio45_ethtool_ksettings_get_npage(mdio, cmd, 0, 0);
}

extern int mdio_mii_ioctl(const struct mdio_if_info *mdio,
			  struct mii_ioctl_data *mii_data, int cmd);

/**
 * mmd_eee_cap_to_ethtool_sup_t
 * @eee_cap: value of the MMD EEE Capability register
 *
 * A small helper function that translates MMD EEE Capability (3.20) bits
 * to ethtool supported settings.
 */
static inline u32 mmd_eee_cap_to_ethtool_sup_t(u16 eee_cap)
{
	u32 supported = 0;

	if (eee_cap & MDIO_EEE_100TX)
		supported |= SUPPORTED_100baseT_Full;
	if (eee_cap & MDIO_EEE_1000T)
		supported |= SUPPORTED_1000baseT_Full;
	if (eee_cap & MDIO_EEE_10GT)
		supported |= SUPPORTED_10000baseT_Full;
	if (eee_cap & MDIO_EEE_1000KX)
		supported |= SUPPORTED_1000baseKX_Full;
	if (eee_cap & MDIO_EEE_10GKX4)
		supported |= SUPPORTED_10000baseKX4_Full;
	if (eee_cap & MDIO_EEE_10GKR)
		supported |= SUPPORTED_10000baseKR_Full;

	return supported;
}

/**
 * mmd_eee_adv_to_ethtool_adv_t
 * @eee_adv: value of the MMD EEE Advertisement/Link Partner Ability registers
 *
 * A small helper function that translates the MMD EEE Advertisment (7.60)
 * and MMD EEE Link Partner Ability (7.61) bits to ethtool advertisement
 * settings.
 */
static inline u32 mmd_eee_adv_to_ethtool_adv_t(u16 eee_adv)
{
	u32 adv = 0;

	if (eee_adv & MDIO_EEE_100TX)
		adv |= ADVERTISED_100baseT_Full;
	if (eee_adv & MDIO_EEE_1000T)
		adv |= ADVERTISED_1000baseT_Full;
	if (eee_adv & MDIO_EEE_10GT)
		adv |= ADVERTISED_10000baseT_Full;
	if (eee_adv & MDIO_EEE_1000KX)
		adv |= ADVERTISED_1000baseKX_Full;
	if (eee_adv & MDIO_EEE_10GKX4)
		adv |= ADVERTISED_10000baseKX4_Full;
	if (eee_adv & MDIO_EEE_10GKR)
		adv |= ADVERTISED_10000baseKR_Full;

	return adv;
}

/**
 * ethtool_adv_to_mmd_eee_adv_t
 * @adv: the ethtool advertisement settings
 *
 * A small helper function that translates ethtool advertisement settings
 * to EEE advertisements for the MMD EEE Advertisement (7.60) and
 * MMD EEE Link Partner Ability (7.61) registers.
 */
static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv)
{
	u16 reg = 0;

	if (adv & ADVERTISED_100baseT_Full)
		reg |= MDIO_EEE_100TX;
	if (adv & ADVERTISED_1000baseT_Full)
		reg |= MDIO_EEE_1000T;
	if (adv & ADVERTISED_10000baseT_Full)
		reg |= MDIO_EEE_10GT;
	if (adv & ADVERTISED_1000baseKX_Full)
		reg |= MDIO_EEE_1000KX;
	if (adv & ADVERTISED_10000baseKX4_Full)
		reg |= MDIO_EEE_10GKX4;
	if (adv & ADVERTISED_10000baseKR_Full)
		reg |= MDIO_EEE_10GKR;

	return reg;
}

int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
int mdiobus_read_nested(struct mii_bus *bus, int addr, u32 regnum);
int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
int mdiobus_write_nested(struct mii_bus *bus, int addr, u32 regnum, u16 val);

int mdiobus_register_device(struct mdio_device *mdiodev);
int mdiobus_unregister_device(struct mdio_device *mdiodev);
bool mdiobus_is_registered_device(struct mii_bus *bus, int addr);
struct phy_device *mdiobus_get_phy(struct mii_bus *bus, int addr);

/**
 * mdio_module_driver() - Helper macro for registering mdio drivers
 *
 * Helper macro for MDIO drivers which do not do anything special in module
 * init/exit. Each module may only use this macro once, and calling it
 * replaces module_init() and module_exit().
 */
#define mdio_module_driver(_mdio_driver)				\
static int __init mdio_module_init(void)				\
{									\
	return mdio_driver_register(&_mdio_driver);			\
}									\
module_init(mdio_module_init);						\
static void __exit mdio_module_exit(void)				\
{									\
	mdio_driver_unregister(&_mdio_driver);				\
}									\
module_exit(mdio_module_exit)

#endif /* __LINUX_MDIO_H__ */
Commit	Line	Data
52c94dfa BH	1	/*
	2	* linux/mdio.h: definitions for MDIO (clause 45) transceivers
	3	* Copyright 2006-2009 Solarflare Communications Inc.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published
	7	* by the Free Software Foundation, incorporated herein by reference.
	8	*/
52c94dfa BH	9	#ifndef __LINUX_MDIO_H__
	10	#define __LINUX_MDIO_H__
	11
607ca46e	12	#include <uapi/linux/mdio.h>
648ea013	13	#include <linux/mod_devicetable.h>
52c94dfa	14
bafbdd52	15	struct gpio_desc;
bac83c65	16	struct mii_bus;
9c717758	17
9a6f2b01 AL	18	/* Multiple levels of nesting are possible. However typically this is
	19	* limited to nested DSA like layer, a MUX layer, and the normal
	20	* user. Instead of trying to handle the general case, just define
	21	* these cases.
	22	*/
	23	enum mdio_mutex_lock_class {
	24	MDIO_MUTEX_NORMAL,
	25	MDIO_MUTEX_MUX,
	26	MDIO_MUTEX_NESTED,
	27	};
	28
e5a03bfd AL	29	struct mdio_device {
e5a03bfd AL	30	struct device dev;
a9049e0c	31
bc87922f	32	const struct dev_pm_ops *pm_ops;
e5a03bfd	33	struct mii_bus *bus;
648ea013	34	char modalias[MDIO_NAME_SIZE];
711fdba3	35
e76a4957	36	int (bus_match)(struct device dev, struct device_driver *drv);
711fdba3 AL	37	void (device_free)(struct mdio_device mdiodev);
	38	void (device_remove)(struct mdio_device mdiodev);
	39
e5a03bfd AL	40	/* Bus address of the MDIO device (0-31) */
e5a03bfd AL	41	int addr;
7f854420	42	int flags;
bafbdd52	43	struct gpio_desc *reset;
04f629f7 RL	44	unsigned int reset_assert_delay;
04f629f7 RL	45	unsigned int reset_deassert_delay;
e5a03bfd AL	46	};
	47	#define to_mdio_device(d) container_of(d, struct mdio_device, dev)
	48
a9049e0c AL	49	/* struct mdio_driver_common: Common to all MDIO drivers */
	50	struct mdio_driver_common {
	51	struct device_driver driver;
	52	int flags;
	53	};
7f854420	54	#define MDIO_DEVICE_FLAG_PHY 1
a9049e0c AL	55	#define to_mdio_common_driver(d) \
	56	container_of(d, struct mdio_driver_common, driver)
	57
	58	/* struct mdio_driver: Generic MDIO driver */
	59	struct mdio_driver {
	60	struct mdio_driver_common mdiodrv;
	61
	62	/*
	63	* Called during discovery. Used to set
	64	* up device-specific structures, if any
	65	*/
	66	int (probe)(struct mdio_device mdiodev);
	67
	68	/* Clears up any memory if needed */
	69	void (remove)(struct mdio_device mdiodev);
	70	};
	71	#define to_mdio_driver(d) \
	72	container_of(to_mdio_common_driver(d), struct mdio_driver, mdiodrv)
	73
	74	void mdio_device_free(struct mdio_device *mdiodev);
	75	struct mdio_device mdio_device_create(struct mii_bus bus, int addr);
	76	int mdio_device_register(struct mdio_device *mdiodev);
	77	void mdio_device_remove(struct mdio_device *mdiodev);
bafbdd52	78	void mdio_device_reset(struct mdio_device *mdiodev, int value);
a9049e0c AL	79	int mdio_driver_register(struct mdio_driver *drv);
a9049e0c AL	80	void mdio_driver_unregister(struct mdio_driver *drv);
648ea013	81	int mdio_device_bus_match(struct device dev, struct device_driver drv);
7f854420	82
52c94dfa BH	83	static inline bool mdio_phy_id_is_c45(int phy_id)
	84	{
	85	return (phy_id & MDIO_PHY_ID_C45) && !(phy_id & ~MDIO_PHY_ID_C45_MASK);
	86	}
	87
	88	static inline __u16 mdio_phy_id_prtad(int phy_id)
	89	{
	90	return (phy_id & MDIO_PHY_ID_PRTAD) >> 5;
	91	}
	92
	93	static inline __u16 mdio_phy_id_devad(int phy_id)
	94	{
	95	return phy_id & MDIO_PHY_ID_DEVAD;
	96	}
	97
1b1c2e95 BH	98	/**
	99	* struct mdio_if_info - Ethernet controller MDIO interface
	100	* @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown)
	101	* @mmds: Mask of MMDs expected to be present in the PHY. This must be
	102	* non-zero unless @prtad = %MDIO_PRTAD_NONE.
	103	* @mode_support: MDIO modes supported. If %MDIO_SUPPORTS_C22 is set then
	104	* MII register access will be passed through with @devad =
	105	* %MDIO_DEVAD_NONE. If %MDIO_EMULATE_C22 is set then access to
	106	* commonly used clause 22 registers will be translated into
	107	* clause 45 registers.
	108	* @dev: Net device structure
	109	* @mdio_read: Register read function; returns value or negative error code
	110	* @mdio_write: Register write function; returns 0 or negative error code
	111	*/
	112	struct mdio_if_info {
	113	int prtad;
23428e6b	114	u32 mmds;
1b1c2e95 BH	115	unsigned mode_support;
	116
	117	struct net_device *dev;
	118	int (mdio_read)(struct net_device dev, int prtad, int devad,
	119	u16 addr);
	120	int (mdio_write)(struct net_device dev, int prtad, int devad,
	121	u16 addr, u16 val);
	122	};
	123
	124	#define MDIO_PRTAD_NONE (-1)
	125	#define MDIO_DEVAD_NONE (-1)
9c717758 BH	126	#define MDIO_SUPPORTS_C22 1
9c717758 BH	127	#define MDIO_SUPPORTS_C45 2
1b1c2e95 BH	128	#define MDIO_EMULATE_C22 4
	129
	130	struct ethtool_cmd;
	131	struct ethtool_pauseparam;
	132	extern int mdio45_probe(struct mdio_if_info *mdio, int prtad);
	133	extern int mdio_set_flag(const struct mdio_if_info *mdio,
	134	int prtad, int devad, u16 addr, int mask,
	135	bool sense);
	136	extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds);
	137	extern int mdio45_nway_restart(const struct mdio_if_info *mdio);
	138	extern void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
	139	struct ethtool_cmd *ecmd,
	140	u32 npage_adv, u32 npage_lpa);
8e4881aa PR	141	extern void
	142	mdio45_ethtool_ksettings_get_npage(const struct mdio_if_info *mdio,
	143	struct ethtool_link_ksettings *cmd,
	144	u32 npage_adv, u32 npage_lpa);
1b1c2e95 BH	145
	146	/**
	147	* mdio45_ethtool_gset - get settings for ETHTOOL_GSET
	148	* @mdio: MDIO interface
	149	* @ecmd: Ethtool request structure
	150	*
	151	* Since the CSRs for auto-negotiation using next pages are not fully
	152	* standardised, this function does not attempt to decode them. Use
	153	* mdio45_ethtool_gset_npage() to specify advertisement bits from next
	154	* pages.
	155	*/
	156	static inline void mdio45_ethtool_gset(const struct mdio_if_info *mdio,
	157	struct ethtool_cmd *ecmd)
	158	{
	159	mdio45_ethtool_gset_npage(mdio, ecmd, 0, 0);
	160	}
	161
8e4881aa PR	162	/**
	163	* mdio45_ethtool_ksettings_get - get settings for ETHTOOL_GLINKSETTINGS
	164	* @mdio: MDIO interface
	165	* @cmd: Ethtool request structure
	166	*
	167	* Since the CSRs for auto-negotiation using next pages are not fully
	168	* standardised, this function does not attempt to decode them. Use
	169	* mdio45_ethtool_ksettings_get_npage() to specify advertisement bits
	170	* from next pages.
	171	*/
	172	static inline void
	173	mdio45_ethtool_ksettings_get(const struct mdio_if_info *mdio,
	174	struct ethtool_link_ksettings *cmd)
	175	{
	176	mdio45_ethtool_ksettings_get_npage(mdio, cmd, 0, 0);
	177	}
	178
1b1c2e95 BH	179	extern int mdio_mii_ioctl(const struct mdio_if_info *mdio,
	180	struct mii_ioctl_data *mii_data, int cmd);
	181
b32607dd AB	182	/**
	183	* mmd_eee_cap_to_ethtool_sup_t
	184	* @eee_cap: value of the MMD EEE Capability register
	185	*
	186	* A small helper function that translates MMD EEE Capability (3.20) bits
	187	* to ethtool supported settings.
	188	*/
	189	static inline u32 mmd_eee_cap_to_ethtool_sup_t(u16 eee_cap)
	190	{
	191	u32 supported = 0;
	192
	193	if (eee_cap & MDIO_EEE_100TX)
	194	supported \|= SUPPORTED_100baseT_Full;
	195	if (eee_cap & MDIO_EEE_1000T)
	196	supported \|= SUPPORTED_1000baseT_Full;
	197	if (eee_cap & MDIO_EEE_10GT)
	198	supported \|= SUPPORTED_10000baseT_Full;
	199	if (eee_cap & MDIO_EEE_1000KX)
	200	supported \|= SUPPORTED_1000baseKX_Full;
	201	if (eee_cap & MDIO_EEE_10GKX4)
	202	supported \|= SUPPORTED_10000baseKX4_Full;
	203	if (eee_cap & MDIO_EEE_10GKR)
	204	supported \|= SUPPORTED_10000baseKR_Full;
	205
	206	return supported;
	207	}
	208
	209	/**
	210	* mmd_eee_adv_to_ethtool_adv_t
	211	* @eee_adv: value of the MMD EEE Advertisement/Link Partner Ability registers
	212	*
	213	* A small helper function that translates the MMD EEE Advertisment (7.60)
	214	* and MMD EEE Link Partner Ability (7.61) bits to ethtool advertisement
	215	* settings.
	216	*/
	217	static inline u32 mmd_eee_adv_to_ethtool_adv_t(u16 eee_adv)
	218	{
	219	u32 adv = 0;
	220
	221	if (eee_adv & MDIO_EEE_100TX)
	222	adv \|= ADVERTISED_100baseT_Full;
	223	if (eee_adv & MDIO_EEE_1000T)
	224	adv \|= ADVERTISED_1000baseT_Full;
	225	if (eee_adv & MDIO_EEE_10GT)
	226	adv \|= ADVERTISED_10000baseT_Full;
	227	if (eee_adv & MDIO_EEE_1000KX)
	228	adv \|= ADVERTISED_1000baseKX_Full;
	229	if (eee_adv & MDIO_EEE_10GKX4)
	230	adv \|= ADVERTISED_10000baseKX4_Full;
	231	if (eee_adv & MDIO_EEE_10GKR)
	232	adv \|= ADVERTISED_10000baseKR_Full;
	233
	234	return adv;
	235	}
	236
	237	/**
	238	* ethtool_adv_to_mmd_eee_adv_t
	239	* @adv: the ethtool advertisement settings
	240	*
	241	* A small helper function that translates ethtool advertisement settings
	242	* to EEE advertisements for the MMD EEE Advertisement (7.60) and
	243	* MMD EEE Link Partner Ability (7.61) registers.
	244	*/
	245	static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv)
246	{
247	u16 reg = 0;
248
249	if (adv & ADVERTISED_100baseT_Full)
250	reg \|= MDIO_EEE_100TX;
251	if (adv & ADVERTISED_1000baseT_Full)
252	reg \|= MDIO_EEE_1000T;
253	if (adv & ADVERTISED_10000baseT_Full)
254	reg \|= MDIO_EEE_10GT;
255	if (adv & ADVERTISED_1000baseKX_Full)
256	reg \|= MDIO_EEE_1000KX;
257	if (adv & ADVERTISED_10000baseKX4_Full)
258	reg \|= MDIO_EEE_10GKX4;
259	if (adv & ADVERTISED_10000baseKR_Full)
260	reg \|= MDIO_EEE_10GKR;
261
262	return reg;
263	}
264
bac83c65 AL	265	int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
	266	int mdiobus_read_nested(struct mii_bus *bus, int addr, u32 regnum);
	267	int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
	268	int mdiobus_write_nested(struct mii_bus *bus, int addr, u32 regnum, u16 val);
	269
7f854420 AL	270	int mdiobus_register_device(struct mdio_device *mdiodev);
	271	int mdiobus_unregister_device(struct mdio_device *mdiodev);
	272	bool mdiobus_is_registered_device(struct mii_bus *bus, int addr);
	273	struct phy_device mdiobus_get_phy(struct mii_bus bus, int addr);
	274
a9049e0c	275	/**
b70f43a1	276	* mdio_module_driver() - Helper macro for registering mdio drivers
a9049e0c AL	277	*
	278	* Helper macro for MDIO drivers which do not do anything special in module
	279	* init/exit. Each module may only use this macro once, and calling it
	280	* replaces module_init() and module_exit().
	281	*/
	282	#define mdio_module_driver(_mdio_driver) \
	283	static int __init mdio_module_init(void) \
	284	{ \
	285	return mdio_driver_register(&_mdio_driver); \
	286	} \
	287	module_init(mdio_module_init); \
	288	static void __exit mdio_module_exit(void) \
	289	{ \
	290	mdio_driver_unregister(&_mdio_driver); \
	291	} \
	292	module_exit(mdio_module_exit)
	293
52c94dfa	294	#endif /* __LINUX_MDIO_H__ */