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net: phy: Allow pre-declaration of MDIO devices

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Allow board support code to collect pre-declarations for MDIO devices by
registering them with mdiobus_register_board_info(). SPI and I2C buses
have a similar feature, we were missing this for MDIO devices, but this
is particularly useful for e.g: MDIO-connected switches which need to
provide their port layout (often board-specific) to a MDIO Ethernet
switch driver.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2017-02-04 13:02:44 -08:00 • committed by David S. Miller
parent 71e0bbde0d
commit 648ea01340
8 changed files with 145 additions and 1 deletions
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3
include/linux/mdio.h
View file

@ -10,6 +10,7 @@
#define __LINUX_MDIO_H__
#include <uapi/linux/mdio.h>
#include <linux/mod_devicetable.h>
struct mii_bus;
@ -29,6 +30,7 @@ struct mdio_device {
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);
@ -71,6 +73,7 @@ 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);
int mdio_device_bus_match(struct device *dev, struct device_driver *drv);
static inline bool mdio_phy_id_is_c45(int phy_id)
{

1
include/linux/mod_devicetable.h
View file

@ -501,6 +501,7 @@ struct platform_device_id {
kernel_ulong_t driver_data;
};
#define MDIO_NAME_SIZE 32
#define MDIO_MODULE_PREFIX "mdio:"
#define MDIO_ID_FMT "%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d"

19
include/linux/phy.h
View file

@ -886,6 +886,25 @@ void mdio_bus_exit(void);
extern struct bus_type mdio_bus_type;
struct mdio_board_info {
const char *bus_id;
char modalias[MDIO_NAME_SIZE];
int mdio_addr;
const void *platform_data;
};
#if IS_ENABLED(CONFIG_PHYLIB)
int mdiobus_register_board_info(const struct mdio_board_info *info,
unsigned int n);
#else
static inline int mdiobus_register_board_info(const struct mdio_board_info *i,
unsigned int n)
{
return 0;
}
#endif
/**
* module_phy_driver() - Helper macro for registering PHY drivers
* @__phy_drivers: array of PHY drivers to register