Change to XCH mode even in dma mode, please refer to the below
errata:
https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf
Signed-off-by: Robin Gong <yibin.g...@nxp.com>
---
drivers/spi/spi-imx.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 09c9a1e..eb56eac 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -585,8 +585,9 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data
*spi_imx,
ctrl |= mx51_ecspi_clkdiv(spi_imx, t->speed_hz, &clk);
spi_imx->spi_bus_clk = clk;
+ /* ERR009165: work in XHC mode as PIO */
if (spi_imx->usedma)
- ctrl |= MX51_ECSPI_CTRL_SMC;
+ ctrl &= ~MX51_ECSPI_CTRL_SMC;
writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);
@@ -612,12 +613,14 @@ static int mx51_ecspi_prepare_transfer(struct
spi_imx_data *spi_imx,
static void mx51_setup_wml(struct spi_imx_data *spi_imx)
{
+ u32 tx_wml = 0;
+
/*
* Configure the DMA register: setup the watermark
* and enable DMA request.
*/
writel(MX51_ECSPI_DMA_RX_WML(spi_imx->wml - 1) |
- MX51_ECSPI_DMA_TX_WML(spi_imx->wml) |
+ MX51_ECSPI_DMA_TX_WML(tx_wml) |
MX51_ECSPI_DMA_RXT_WML(spi_imx->wml) |
MX51_ECSPI_DMA_TEDEN | MX51_ECSPI_DMA_RXDEN |
MX51_ECSPI_DMA_RXTDEN, spi_imx->base + MX51_ECSPI_DMA);
@@ -1265,10 +1268,6 @@ static int spi_imx_sdma_init(struct device *dev, struct
spi_imx_data *spi_imx,
{
int ret;
- /* use pio mode for i.mx6dl chip TKT238285 */
- if (of_machine_is_compatible("fsl,imx6dl"))
- return 0;
-
spi_imx->wml = spi_imx->devtype_data->fifo_size / 2;
/* Prepare for TX DMA: */
--
2.7.4
