Commit 980f8848 authored by Robin Gong's avatar Robin Gong Committed by Shawn Guo
Browse files

spi: imx: fix ERR009165 

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: default avatarRobin Gong <yibin.gong@nxp.com>
Reviewed-by: default avatarLucas Stach <l.stach@pengutronix.de>
Acked-by: default avatarMark Brown <broonie@kernel.org>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent a4965888

drivers/spi/spi-imx.c

+3 −7
Original line number Diff line number Diff line
@@ -591,8 +591,8 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx, 
	ctrl |= mx51_ecspi_clkdiv(spi_imx, spi_imx->spi_bus_clk, &clk);

	spi_imx->spi_bus_clk = clk;



	if (spi_imx->usedma)

		ctrl |= MX51_ECSPI_CTRL_SMC;

	/* ERR009165: work in XHC mode as PIO */

	ctrl &= ~MX51_ECSPI_CTRL_SMC;



	writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);
@@ -623,7 +623,7 @@ static void mx51_setup_wml(struct spi_imx_data *spi_imx) 
	 * 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(0) |

		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);
@@ -1239,10 +1239,6 @@ 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: */