Unverified Commit 3e582c6e authored by Leilk Liu's avatar Leilk Liu Committed by Mark Brown
Browse files

spi: mediatek: add SPI_LSB_FIRST support 



this patch add SPI_LSB_FIRST feature support.

Signed-off-by: default avatarLeilk Liu <leilk.liu@mediatek.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent b0823ee3

drivers/spi/spi-mt65xx.c

+6 −9
Original line number Diff line number Diff line
@@ -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;

include/linux/platform_data/spi-mt65xx.h

+0 −2
Original line number Diff line number Diff line
@@ -14,8 +14,6 @@ 


/* Board specific platform_data */

struct mtk_chip_config {

	u32 tx_mlsb;

	u32 rx_mlsb;

	u32 cs_pol;

	u32 sample_sel;

};