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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>
hifive-unleashed-5.1
Emil Renner Berthing 2018-10-31 11:57:11 +01:00 committed by Mark Brown
parent 65498c6ae2
commit 04290192f7
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 3 additions and 1 deletions
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4
drivers/spi/spi-rockchip.c
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@ -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);