最終更新:2014-05-23 (金) 04:08:47 (1885d)  

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The basic device structure

http://lxr.onakasuita.org/source/include/linux/device.h#L722

struct device {
        struct device           *parent;

        struct device_private   *p;

        struct kobject kobj;
        const char              *init_name; /* initial name of the device */
        const struct device_type *type;

        struct mutex            mutex;  /* mutex to synchronize calls to
                                         * its driver.
                                         */

        struct bus_type *bus;           /* type of bus device is on */
        struct device_driver *driver;   /* which driver has allocated this
                                           device */
        void            *platform_data; /* Platform specific data, device
                                           core doesn't touch it */
        struct dev_pm_info      power;
        struct dev_pm_domain    *pm_domain;

#ifdef CONFIG_PINCTRL
        struct dev_pin_info     *pins;
#endif

#ifdef CONFIG_NUMA
        int             numa_node;      /* NUMA node this device is close to */
#endif
        u64             *dma_mask;      /* dma mask (if dma'able device) */
        u64             coherent_dma_mask;/* Like dma_mask, but for
                                             alloc_coherent mappings as
                                             not all hardware supports
                                             64 bit addresses for consistent
                                             allocations such descriptors. */

        struct device_dma_parameters *dma_parms;

        struct list_head        dma_pools;      /* dma pools (if dma'ble) */

        struct dma_coherent_mem *dma_mem; /* internal for coherent mem
                                             override */
#ifdef CONFIG_DMA_CMA
        struct cma *cma_area;           /* contiguous memory area for dma
                                           allocations */
#endif
        /* arch specific additions */
        struct dev_archdata     archdata;

        struct device_node      *of_node; /* associated device tree node */
        struct acpi_dev_node    acpi_node; /* associated ACPI device node */

        dev_t                   devt;   /* dev_t, creates the sysfs "dev" */
        u32                     id;     /* device instance */

        spinlock_t              devres_lock;
        struct list_head        devres_head;

        struct klist_node       knode_class;
        struct class            *class;
        const struct attribute_group **groups;  /* optional groups */

        void    (*release)(struct device *dev);
        struct iommu_group      *iommu_group;

        bool                    offline_disabled:1;
        bool                    offline:1;
};

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