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path: root/drivers/spi
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Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-imx.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index e7a19be87c38..50769078e72e 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -211,11 +211,15 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
struct spi_transfer *transfer)
{
struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
- unsigned int bpw = transfer->bits_per_word;
+ unsigned int bpw;
if (!master->dma_rx)
return false;
+ if (!transfer)
+ return false;
+
+ bpw = transfer->bits_per_word;
if (!bpw)
bpw = spi->bits_per_word;
@@ -333,8 +337,9 @@ static void __maybe_unused mx51_ecspi_trigger(struct spi_imx_data *spi_imx)
static int __maybe_unused mx51_ecspi_config(struct spi_imx_data *spi_imx,
struct spi_imx_config *config)
{
- u32 ctrl = MX51_ECSPI_CTRL_ENABLE, cfg = 0;
+ u32 ctrl = MX51_ECSPI_CTRL_ENABLE;
u32 clk = config->speed_hz, delay, reg;
+ u32 cfg = readl(spi_imx->base + MX51_ECSPI_CONFIG);
/*
* The hardware seems to have a race condition when changing modes. The
@@ -358,13 +363,20 @@ static int __maybe_unused mx51_ecspi_config(struct spi_imx_data *spi_imx,
if (config->mode & SPI_CPHA)
cfg |= MX51_ECSPI_CONFIG_SCLKPHA(config->cs);
+ else
+ cfg &= ~MX51_ECSPI_CONFIG_SCLKPHA(config->cs);
if (config->mode & SPI_CPOL) {
cfg |= MX51_ECSPI_CONFIG_SCLKPOL(config->cs);
cfg |= MX51_ECSPI_CONFIG_SCLKCTL(config->cs);
+ } else {
+ cfg &= ~MX51_ECSPI_CONFIG_SCLKPOL(config->cs);
+ cfg &= ~MX51_ECSPI_CONFIG_SCLKCTL(config->cs);
}
if (config->mode & SPI_CS_HIGH)
cfg |= MX51_ECSPI_CONFIG_SSBPOL(config->cs);
+ else
+ cfg &= ~MX51_ECSPI_CONFIG_SSBPOL(config->cs);
if (spi_imx->usedma)
ctrl |= MX51_ECSPI_CTRL_SMC;