From: Robin Gong <yibin.gong@xxxxxxx> 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.gong@xxxxxxx> Acked-by: Mark Brown <broonie@xxxxxxxxxx> --- drivers/spi/spi-imx.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 09c9a1e..6795910 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); @@ -1171,7 +1174,11 @@ static int spi_imx_dma_configure(struct spi_master *master) tx.direction = DMA_MEM_TO_DEV; tx.dst_addr = spi_imx->base_phys + MXC_CSPITXDATA; tx.dst_addr_width = buswidth; - tx.dst_maxburst = spi_imx->wml; + /* + * For ERR009165 with tx_wml = 0 could enlarge burst size to fifo size + * to speed up fifo filling as possible. + */ + tx.dst_maxburst = spi_imx->devtype_data->fifo_size; ret = dmaengine_slave_config(master->dma_tx, &tx); if (ret) { dev_err(spi_imx->dev, "TX dma configuration failed with %d\n", ret); @@ -1265,10 +1272,6 @@ 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
