How to use the w5500 network module？

[prelude]

I saw the driver code of the w5500 on Nuttx, but I did not find any routine 
using these driver codes. The w5500_initialize interface has not been called by 
any code. Have any friends used the w5500 on nuttx?


int w5500_initialize(FAR struct spi_dev_s *spi_dev,
                    FAR const struct w5500_lower_s *lower,
                    unsigned int devno)
{
 FAR struct w5500_driver_s *self;