Linux Kernel设备驱动模型之struct device_private

最新推荐文章于 2025-05-29 18:39:46 发布

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最新推荐文章于 2025-05-29 18:39:46 发布

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分类专栏： Linux Kernel 设备驱动

本文链接：https://blog.youkuaiyun.com/sunlei0625/article/details/60966357

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本文详细介绍了设备私有数据结构device_private的具体内容，包括其内部字段如klist_children、knode_parent等的作用及意义，并强调了这些字段仅用于驱动核心部分且不应被外部访问。

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设备私有数据描述：

/**
 * struct device_private - structure to hold the private to the driver core portions of the device structure.
 *
 * @klist_children - klist containing all children of this device
 * @knode_parent - node in sibling list
 * @knode_driver - node in driver list
 * @knode_bus - node in bus list
 * @deferred_probe - entry in deferred_probe_list which is used to retry the
 * binding of drivers which were unable to get all the resources needed by
 * the device; typically because it depends on another driver getting
 * probed first.
 * @device - pointer back to the struct device that this structure is
 * associated with.
 *
 * Nothing outside of the driver core should ever touch these fields.
 */
struct device_private {
 struct klist klist_children;
 struct klist_node knode_parent;
 struct klist_node knode_driver;
 struct klist_node knode_bus;
 struct list_head deferred_probe;
 struct device *device;
};