lan9252_spi_read
ret = lan9252_spi_read(spi, LAN9252_BYTE_TEST, &data);
ret = lan9252_spi_read(spi, LAN9252_HW_CFG, &data);
ret = lan9252_spi_read(spi, LAN9252_ECAT_CSR_CMD, &data);
ret = lan9252_spi_read(spi, LAN9252_ECAT_CSR_CMD, &data);
ret = lan9252_spi_read(spi, LAN9252_ECAT_CSR_DATA, data);