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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>
This commit is contained in:
Leilk Liu 2019-06-05 11:07:04 +08:00 committed by Mark Brown
parent b0823ee35c
commit 3e582c6e91
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 6 additions and 11 deletions
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15
drivers/spi/spi-mt65xx.c
View File

@ -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;

2
include/linux/platform_data/spi-mt65xx.h
View File

@ -14,8 +14,6 @@
/* Board specific platform_data */
struct mtk_chip_config {
u32 tx_mlsb;
u32 rx_mlsb;
u32 cs_pol;
u32 sample_sel;
};