转自:https://www.cnblogs.com/sky-heaven/p/6869591.html
版权声明:本文为博主原创文章,遵循 CC 4.0 BY-SA 版权协议,转载请附上原文出处链接和本声明。
本文链接:https://blog.csdn.net/Obsession2015/article/details/77933852
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;
---------------error = fn(dev, data); 使用id_table匹配方式则可匹配多个设备。
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版权声明:本文为CSDN博主「Linux匿名者」的原创文章,遵循 CC 4.0 BY-SA 版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/obsession2015/article/details/77933852