diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2020-02-18 11:58:09 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-02-19 01:08:24 +0100 |
| commit | c046f8fd83a902866ba3b122e9f57ca1c7de898c (patch) | |
| tree | abe53b8d654ea8916dd0e452b71c729f42826a12 | |
| parent | spi: rspi: Factor out handling of common mode bits (diff) | |
| download | linux-c046f8fd83a902866ba3b122e9f57ca1c7de898c.tar.xz linux-c046f8fd83a902866ba3b122e9f57ca1c7de898c.zip | |
spi: rspi: Add support for LSB-first word order
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@glider.be>
Link: https://lore.kernel.org/r/20200218105810.902-3-geert+renesas@glider.be
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | drivers/spi/spi-rspi.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 7a1e6d524f34..aef05f2ac749 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; |