struct rb4xx_spi *rbspi = spi_master_get_devdata(spi->master);
unsigned long flags;
- if (spi->mode & ~(SPI_CS_HIGH)) {
+ if (spi->mode & ~(SPI_CS_HIGH | SPI_TX_DUAL)) {
dev_err(&spi->dev, "mode %x not supported\n",
(unsigned) spi->mode);
return -EINVAL;