SPI_3WIRE_HIZ
spi->mode |= SPI_3WIRE_HIZ;
if (spi->mode & SPI_3WIRE_HIZ) {
host->mode_bits = SPI_3WIRE | SPI_3WIRE_HIZ | SPI_CPHA | SPI_CPOL |
| SPI_RX_CPHA_FLIP | SPI_3WIRE_HIZ \
mode |= SPI_3WIRE_HIZ;