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//mdio

在drivers/net/ethernet/hieth-gmac/下面有一个文件higmac.c 里面实现了一个platform框架,并且创建了一个杂项设备.       	ret = platform_device_register(&higmac_platform_device);      	if (ret) {
         		pr_err("register netdevice device failed!");      		goto _error_register_device;      	}            	ret = platform_driver_register(&higmac_dev_driver);      	if (ret) {
         		pr_err("register netdevice driver failed!");      		goto _error_register_driver;      	}      	ret = misc_register(&gmac_dev);      	if (ret) {
         		pr_err("register misc device failed!");      		goto _error_register_misc_dev;      	} else      		miscdev_registered = 1;

//platform device端static struct platform_device higmac_platform_device = {
   	.name		= HIGMAC_DRIVER_NAME,	.id		= 0,	.dev		= {
   		.dma_mask = &higmac_dmamask,		.coherent_dma_mask = DMA_BIT_MASK(32),		.release = higmac_platform_dev_release,	},	.num_resources	= ARRAY_SIZE(higmac_resources),	.resource	= higmac_resources,};

//platform driver端static struct platform_driver higmac_dev_driver = {
   	.probe		= higmac_dev_probe,//init	.remove		= higmac_dev_remove,//remove	.suspend	= higmac_dev_suspend,//pause	.resume		= higmac_dev_resume,//reset	.driver		= {
   		.owner	= THIS_MODULE,		.name	= HIGMAC_DRIVER_NAME,	},};

//杂项设备static struct miscdevice gmac_dev = {
   	MISC_DYNAMIC_MINOR,	"gmac",	&gmac_fops};

看driver 端的probe函数,驱动一经插入,就开始执行/*1. init glb adapter*/  /*2. 填充id netdev 和 higmac_board_info*/  /*3.  init hw controller*/  /*4. phy reset*/  /*5. fwd_setup*/  /*6. init hw desc queue*/  /*7. register mdio bus*/  /*8. connect phy*/  /*9. request irq*/  /*10. register netdevice*/

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