TUSB1046_REG_GENERAL
val = i2c_smbus_read_byte_data(client, TUSB1046_REG_GENERAL);
ret = i2c_smbus_write_byte_data(client, TUSB1046_REG_GENERAL, val);
val = i2c_smbus_read_byte_data(client, TUSB1046_REG_GENERAL);
ret = i2c_smbus_write_byte_data(client, TUSB1046_REG_GENERAL, val);