[PATCH] spi: mediatek: add SPI_LSB_FIRST support

[Leilk Liu]

this patch add SPI_LSB_FIRST feature support.

Signed-off-by: Leilk Liu <leilk....@mediatek.com>
---
 drivers/spi/spi-mt65xx.c                 |   15 ++++++---------
 include/linux/platform_data/spi-mt65xx.h |    2 --
 2 files changed, 6 insertions(+), 11 deletions(-)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 0cce6f0..7f4dc18 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -131,8 +131,6 @@ struct mtk_spi {
  * 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;
diff --git a/include/linux/platform_data/spi-mt65xx.h 
b/include/linux/platform_data/spi-mt65xx.h
index ba4e4bb..8d5df58 100644
--- a/include/linux/platform_data/spi-mt65xx.h
+++ b/include/linux/platform_data/spi-mt65xx.h
@@ -14,8 +14,6 @@
 
 /* Board specific platform_data */
 struct mtk_chip_config {
-       u32 tx_mlsb;
-       u32 rx_mlsb;
        u32 cs_pol;
        u32 sample_sel;
 };
-- 
1.7.9.5