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8250_omap.c与850_core.c是什么关系

Other Parts Discussed in Thread: DM385

为什么8250_omap.c中已经注册了一个platform_driver:module_platform_driver(omap8250_platform_driver);而后又在8250_core.c中又注册一个驱动:ret = platform_driver_register(&serial8250_isa_driver);  这两个是同一个驱动还是两个不同驱动?