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authorLeilk Liu <leilk.liu@mediatek.com>2019-06-05 11:07:04 +0800
committerMark Brown <broonie@kernel.org>2019-06-06 22:24:00 +0100
commit3e582c6e911ffe6c90b9f90324bdf85fc728d0c3 (patch)
treed5d8eeffebce70504215a1422a8bb0801cff265c /drivers/spi
parentb0823ee35cf9bc6b9a5403c12f12bd3e0b490045 (diff)
downloadlinux-3e582c6e911ffe6c90b9f90324bdf85fc728d0c3.tar.bz2
spi: mediatek: add SPI_LSB_FIRST support
this patch add SPI_LSB_FIRST feature support. Signed-off-by: Leilk Liu <leilk.liu@mediatek.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-mt65xx.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 0cce6f0ba824..7f4dc1844789 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -131,8 +131,6 @@ static const struct mtk_spi_compatible mt8183_compat = {
* supplies it.
*/
static const struct mtk_chip_config mtk_default_chip_info = {
- .rx_mlsb = 1,
- .tx_mlsb = 1,
.cs_pol = 0,
.sample_sel = 0,
};
@@ -203,14 +201,13 @@ static int mtk_spi_prepare_message(struct spi_master *master,
reg_val &= ~SPI_CMD_CPOL;
/* set the mlsbx and mlsbtx */
- if (chip_config->tx_mlsb)
- reg_val |= SPI_CMD_TXMSBF;
- else
+ if (spi->mode & SPI_LSB_FIRST) {
reg_val &= ~SPI_CMD_TXMSBF;
- if (chip_config->rx_mlsb)
- reg_val |= SPI_CMD_RXMSBF;
- else
reg_val &= ~SPI_CMD_RXMSBF;
+ } else {
+ reg_val |= SPI_CMD_TXMSBF;
+ reg_val |= SPI_CMD_RXMSBF;
+ }
/* set the tx/rx endian */
#ifdef __LITTLE_ENDIAN
@@ -607,7 +604,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
master->auto_runtime_pm = true;
master->dev.of_node = pdev->dev.of_node;
- master->mode_bits = SPI_CPOL | SPI_CPHA;
+ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
master->set_cs = mtk_spi_set_cs;
master->prepare_message = mtk_spi_prepare_message;