All RSPI variants support selecting the word order. Advertize support for LSB-first order, and act upon the flag being set. Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> --- drivers/spi/spi-rspi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 7a1e6d524f34a416..aef05f2ac749c21d 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -933,6 +933,8 @@ static int rspi_prepare_message(struct spi_controller *ctlr, rspi->spcmd |= SPCMD_CPOL; if (spi->mode & SPI_CPHA) rspi->spcmd |= SPCMD_CPHA; + if (spi->mode & SPI_LSB_FIRST) + rspi->spcmd |= SPCMD_LSBF; /* Configure slave signal to assert */ rspi->spcmd |= SPCMD_SSLA(spi->cs_gpiod ? rspi->ctlr->unused_native_cs @@ -1255,7 +1257,8 @@ static int rspi_probe(struct platform_device *pdev) ctlr->transfer_one = ops->transfer_one; ctlr->prepare_message = rspi_prepare_message; ctlr->unprepare_message = rspi_unprepare_message; - ctlr->mode_bits = SPI_CPHA | SPI_CPOL | SPI_LOOP | ops->extra_mode_bits; + ctlr->mode_bits = SPI_CPHA | SPI_CPOL | SPI_LSB_FIRST | SPI_LOOP | + ops->extra_mode_bits; ctlr->flags = ops->flags; ctlr->dev.of_node = pdev->dev.of_node; ctlr->use_gpio_descriptors = true; -- 2.17.1
