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/** * I2C_BOARD_INFO - macro used to list an i2c device and its address * @dev_type: identifies the device type * @dev_addr: the device's address on the bus. * * This macro initializes essential fields of a struct i2c_board_info, * declaring what has been provided on a particular board.  Optional * fields (such as associated irq, or device-specific platform_data) * are provided using conventional syntax. */#define I2C_BOARD_INFO(dev_type, dev_addr) \	.type = dev_type, .addr = (dev_addr)/** * struct i2c_board_info - template for device creation * @type: chip type, to initialize i2c_client.name * @flags: to initialize i2c_client.flags * @addr: stored in i2c_client.addr * @platform_data: stored in i2c_client.dev.platform_data * @archdata: copied into i2c_client.dev.archdata * @of_node: pointer to OpenFirmware device node * @acpi_node: ACPI device node * @irq: stored in i2c_client.irq * * I2C doesn't actually support hardware probing, although controllers and * devices may be able to use I2C_SMBUS_QUICK to tell whether or not there's * a device at a given address.  Drivers commonly need more information than * that, such as chip type, configuration, associated IRQ, and so on. * * i2c_board_info is used to build tables of information listing I2C devices * that are present.  This information is used to grow the driver model tree. * For mainboards this is done statically using i2c_register_board_info(); * bus numbers identify adapters that aren't yet available.  For add-on boards, * i2c_new_device() does this dynamically with the adapter already known. */struct i2c_board_info {
   	char		type[I2C_NAME_SIZE];	unsigned short	flags;	unsigned short	addr;	void		*platform_data;	struct dev_archdata	*archdata;	struct device_node *of_node;	struct acpi_dev_node acpi_node;	int		irq;};

//找到了//在busses下面有很多文件,这些文件就是i2c_driver端#define HI_I2C  "hisi_i2c"//device 端的名字在下面声明static struct i2c_board_info hi_info ={
       I2C_BOARD_INFO("nvp6124", 0x60),};//上面创建了一个info结构体,然后创建设备的时候用了.struct i2c_client *i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info){
     ...  struct i2c_client	*client;  ...  strlcpy(client->name, info->type, sizeof(client->name));  ...}//然后在这里面,就完成了一个拷贝.

static int i2c_device_match(struct device *dev, struct device_driver *drv){
   	struct i2c_client	*client = i2c_verify_client(dev);	struct i2c_driver	*driver;	if (!client)		return 0;	/* Attempt an OF style match */	if (of_driver_match_device(dev, drv))		return 1;	/* Then ACPI style match */	if (acpi_driver_match_device(dev, drv))		return 1;	driver = to_i2c_driver(drv);	/* match on an id table if there is one */	if (driver->id_table)		return i2c_match_id(driver->id_table, client) != NULL;	return 0;}//这里面是i2c的匹配过程

所以这里面就应该将设备的name 和 dirver端的name 匹配正确才行

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