+static struct i2c_client *lm4857_client;
+
+static int __init neo1973_add_lm4857_device(struct platform_device *pdev,
+ int i2c_bus,
+ unsigned short i2c_address)
+{
+ struct i2c_board_info info;
+ struct i2c_adapter *adapter;
+ struct i2c_client *client;
+ int ret;
+
+ ret = i2c_add_driver(&lm4857_i2c_driver);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "can't add lm4857 driver\n");
+ return ret;
+ }
+
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ info.addr = i2c_address;
+ strlcpy(info.type, "neo1973_lm4857", I2C_NAME_SIZE);
+
+ adapter = i2c_get_adapter(i2c_bus);
+ if (!adapter) {
+ dev_err(&pdev->dev, "can't get i2c adapter %d\n", i2c_bus);
+ goto err_driver;
+ }
+
+ client = i2c_new_device(adapter, &info);
+ i2c_put_adapter(adapter);
+ if (!client) {
+ dev_err(&pdev->dev, "can't add lm4857 device at 0x%x\n",
+ (unsigned int)info.addr);
+ goto err_driver;
+ }
+
+ lm4857_client = client;
+ return 0;
+
+err_driver:
+ i2c_del_driver(&lm4857_i2c_driver);
+ return -ENODEV;
+}