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mdio: Add support for mdio drivers.

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Not all devices on an MDIO bus are PHYs. Meaning not all MDIO drivers
are PHY drivers. Add support for generic MDIO drivers.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn
2016-01-06 20:11:26 +01:00
committed by David S. Miller
parent f89df3f381
commit a9049e0c51
7 changed files with 286 additions and 17 deletions
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50
include/linux/mdio.h
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@@ -15,6 +15,7 @@ struct mii_bus;
struct mdio_device {
struct device dev;
const struct dev_pm_ops *pm_ops;
struct mii_bus *bus;
int (*bus_match)(struct device *dev, struct device_driver *drv);
@@ -24,7 +25,37 @@ struct mdio_device {
};
#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);
int mdio_driver_register(struct mdio_driver *drv);
void mdio_driver_unregister(struct mdio_driver *drv);
static inline bool mdio_phy_id_is_c45(int phy_id)
{
@@ -197,4 +228,23 @@ 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);
/**
* module_mdio_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__ */