diff options
| author | Emil Renner Berthing <kernel@esmil.dk> | 2018-10-31 11:57:11 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-11-05 12:42:43 +0100 |
| commit | 04290192f7ebe892828f69ac57c4684e25da378d (patch) | |
| tree | 1d3a08a671d588314d7c88c4f4cc0a13d507c196 /drivers/spi | |
| parent | spi: rockchip: support 4bit words (diff) | |
| download | linux-04290192f7ebe892828f69ac57c4684e25da378d.tar.xz linux-04290192f7ebe892828f69ac57c4684e25da378d.zip | |
spi: rockchip: support lsb-first mode
Add missing support for lsb-first mode.
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-rockchip.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 9e47e81553a1..3912526ead66 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -476,6 +476,8 @@ static void rockchip_spi_config(struct rockchip_spi *rs, cr0 |= rs->rsd << CR0_RSD_OFFSET; cr0 |= (spi->mode & 0x3U) << CR0_SCPH_OFFSET; + if (spi->mode & SPI_LSB_FIRST) + cr0 |= CR0_FBM_LSB << CR0_FBM_OFFSET; if (xfer->rx_buf && xfer->tx_buf) cr0 |= CR0_XFM_TR << CR0_XFM_OFFSET; @@ -681,7 +683,7 @@ static int rockchip_spi_probe(struct platform_device *pdev) master->auto_runtime_pm = true; master->bus_num = pdev->id; - master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LOOP; + master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LOOP | SPI_LSB_FIRST; master->num_chipselect = ROCKCHIP_SPI_MAX_CS_NUM; master->dev.of_node = pdev->dev.of_node; master->bits_per_word_mask = SPI_BPW_MASK(16) | SPI_BPW_MASK(8) | SPI_BPW_MASK(4); |