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net: phy: Add helpers to determine if PHY driver is generic 

We are already checking in phy_detach() that the PHY driver is of
generic kind (1G or 10G) and we are going to make use of that in the SFP
layer as well for 1000BaseT SFP modules, so expose helper functions to
return that information.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2019-01-15 15:09:35 -08:00 committed by David S. Miller
parent 6f24e15991
commit 5db5ea995f
2 changed files with 35 additions and 2 deletions
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34
drivers/net/phy/phy_device.c
View File

@ -1277,6 +1277,36 @@ struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
}
EXPORT_SYMBOL(phy_attach);
static bool phy_driver_is_genphy_kind(struct phy_device *phydev,
struct device_driver *driver)
{
struct device *d = &phydev->mdio.dev;
bool ret = false;
if (!phydev->drv)
return ret;
get_device(d);
ret = d->driver == driver;
put_device(d);
return ret;
}
bool phy_driver_is_genphy(struct phy_device *phydev)
{
return phy_driver_is_genphy_kind(phydev,
&genphy_driver.mdiodrv.driver);
}
EXPORT_SYMBOL_GPL(phy_driver_is_genphy);
bool phy_driver_is_genphy_10g(struct phy_device *phydev)
{
return phy_driver_is_genphy_kind(phydev,
&genphy_10g_driver.mdiodrv.driver);
}
EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g);
/**
* phy_detach - detach a PHY device from its network device
* @phydev: target phy_device struct
@ -1308,8 +1338,8 @@ void phy_detach(struct phy_device *phydev)
* from the generic driver so that there's a chance a
* real driver could be loaded
*/
if (phydev->mdio.dev.driver == &genphy_10g_driver.mdiodrv.driver ||
phydev->mdio.dev.driver == &genphy_driver.mdiodrv.driver)
if (phy_driver_is_genphy(phydev) ||
phy_driver_is_genphy_10g(phydev))
device_release_driver(&phydev->mdio.dev);
/*

3
include/linux/phy.h
View File

@ -1183,4 +1183,7 @@ module_exit(phy_module_exit)
#define module_phy_driver(__phy_drivers) \
phy_module_driver(__phy_drivers, ARRAY_SIZE(__phy_drivers))
bool phy_driver_is_genphy(struct phy_device *phydev);
bool phy_driver_is_genphy_10g(struct phy_device *phydev);
#endif /* __PHY_H */