MDIO总线相关

MDIO总线相关_3

2024-05-27 16:58

文章标签 相关总线 mdio

本文主要是介绍MDIO总线相关_3，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

##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));
}