platform框架
platform框架
- 注册设备进入总线
- platform_device_register函数
- 注册驱动进入总线
- platform_driver_register函数
注册设备进入总线
platform_device_register函数
int platform_device_register(struct platform_device *pdev)
struct platform_device {const char * name; 名字与驱动名一定要相同int id;struct device dev;u32 num_resources;struct resource * resource;struct platform_device_id *id_entry;/* arch specific additions */struct pdev_archdata archdata;
};
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struct device {struct device *parent;struct device_private *p;struct kobject kobj;const char *init_name;/* initial name of the device */struct device_type *type;struct semaphore sem; /* semaphore to synchronize calls to* its driver.*/struct bus_type *bus; /* type of bus device is on */struct device_driver *driver; /* which driver has allocated thisdevice */void *platform_data; /* Platform specific data, devicecore doesn't touch it */struct dev_pm_info power;#ifdef CONFIG_NUMAint numa_node; /* NUMA node this device is close to */
#endifu64 *dma_mask; /* dma mask (if dma'able device) */u64 coherent_dma_mask;/* Like dma_mask, but foralloc_coherent mappings asnot all hardware supports64 bit addresses for consistentallocations 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 memoverride *//* arch specific additions */struct dev_archdata archdata;dev_t devt; /* dev_t, creates the sysfs "dev" */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);
};
注册驱动进入总线
platform_driver_register函数
int platform_driver_register(struct platform_driver *drv)
struct platform_driver {int (*probe)(struct platform_device *);int (*remove)(struct platform_device *);void (*shutdown)(struct platform_device *);int (*suspend)(struct platform_device *, pm_message_t state);int (*resume)(struct platform_device *);struct device_driver driver;struct platform_device_id *id_table;
};
在probe中初始化
在remove中删除