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##这里主要是匹配

总线匹配

struct bus_type mdio_bus_type = {
   	.name		= "mdio_bus",	.match		= mdio_bus_match,	.pm		= MDIO_BUS_PM_OPS,	.dev_attrs	= mdio_dev_attrs,};

从上面的结构体可以看出,linux中有多种总线类型.估计是从来匹配的.

例如platform的

struct bus_type platform_bus_type = {
         .name = “platform”,      .dev_attrs = platform_dev_attrs,      .match = platform_match,      .uevent = platform_uevent,      .pm = PLATFORM_PM_OPS_PTR,  };

可以看出和猜想一致

接下来看一下我们关心的匹配的总线

/** * mdio_bus_match - determine if given PHY driver supports the given PHY device * @dev: target PHY device * @drv: given PHY driver * * Description: Given a PHY device, and a PHY driver, return 1 if *   the driver supports the device.  Otherwise, return 0. */static int mdio_bus_match(struct device *dev, struct device_driver *drv){
   	struct phy_device *phydev = to_phy_device(dev);	struct phy_driver *phydrv = to_phy_driver(drv);	if (of_driver_match_device(dev, drv))		return 1;	if (phydrv->match_phy_device)		return phydrv->match_phy_device(phydev);	return ((phydrv->phy_id & phydrv->phy_id_mask) ==		(phydev->phy_id & phydrv->phy_id_mask));}

可以看出来是根据是根据phy_id & phy_id_mask 是否想等来确定的.

那这个函数是谁调用的呢?应该是内核里面的核心吧.找不到

可以看到,最后一句里面的东西

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