1.CONFIG_OF

在一些驅動中經常看到#ifdef CONFIG_OF，這里的OF是Open Firmware。

Open Firmware. This was invented long time ago when Apple was producing laptops based on PowerPC CPUs. Openfirmware provides a good description of the devices connected to the platform. In Linux kernel the part that works with device data is called Device Tree (DT). More details in the?Usage model.

詳細參考kernel\Documentation\devicetree\usage-model.txt

總結

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