Platform驱动模型匹配过程

#device方面：
platform_device_register(struct platform_device *dev)
------platform_device_add(pdev)；
----------device_add(&pdev->dev);
--------------bus_probe_device(dev);
-------------------device_attach(dev);
-------------------------bus_for_each_drv(dev->bus, NULL, dev, __device_attach);
-------------------------------driver_match_device(drv, dev)；成功才向下执行probe！
-------------------------------------driver_probe_device(drv, dev);
--------------------------------------------really_probe(dev, drv);
----------------------------------------------------dev->bus->probe(dev);或者drv->probe(dev);platform_device_add(pdev)；

#driver方面：
platform_driver_register(struct platform_driver * drv)
--------driver_register(&drv->driver);
------------bus_add_driver(drv);
-----------------driver_attach(drv);
------------------------bus_for_each_dev(drv->bus, NULL, drv, __driver_attach); 遍历所有节点!
-------------------------------driver_match_device(drv, dev)；成功才向下执行probe！
---------------------------------------driver_probe_device(drv, dev);
------------------------------------------------really_probe(dev, drv);
---------------------------------------------------------dev->bus->probe(dev);或者drv->probe(dev);



driver_match_device()  是匹配的关键，实质是上执行：
--------return drv->bus->match ? drv->bus->match(dev, drv) : 1;
------------------.match = platform_match  最终调用bus中的platform_match函数来匹配。


bus_for_each_drv/dev()  函数中：
---------while ((dev = next_device(&i)) && !error)  遍历所有节点;