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platform device

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Platform devices are devices that typically appear as autonomous entities in the system. This includes legacy port-based devices and host bridges to peripheral buses, and most controllers integrated into system-on-chip platforms. What they usually have in common is direct addressing from a CPU bus. Rarely, a platform_device will be connected through a segment of some other kind of bus; but its registers will still be directly addressable.

sysfs sysfs.txt platform.txt 使用/sys 文件系统访问Linux 内核 Jarson's blog《linux设备模型》

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