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接前一篇文章：Linux网络驱动之Fixed-Link（24）三、深入了解上一回开始解析platform_device_add函数，讲了前边两段，本回继续。为了便于理解和回顾，再次贴出其源码，在drivers/base/platform.c中，如下：/** * platform_device_add - add a platform device to device hierarchy * @pdev: platform device we're adding * * This is part 2 of platform_device_register(), though may be called * separately _iff_ pdev was allocated by platform_device_alloc(). */ int platform_device_add(struct platform_device *pdev) { u32 i; int ret; if (!pdev) return -EINVAL; if (!pdev-dev.parent) pdev-dev.parent = platform_bus; pdev-dev.bus = platform_bus_type; switch (pdev-id) { default: dev_set_name(pdev-dev, "%s.%d", pdev-name, pdev-id); break; case PLATFORM_DEVID_NONE: dev_set_name(pdev-dev, "%s", pdev-name); break; case PLATFORM_D