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Commit a02bb401 authored by Robin Gong's avatar Robin Gong Committed by Mark Brown
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spi: imx: use pio mode for i.mx6dl 



For TKT238285 hardware issue which may cause txfifo store data twice can only
be caught on i.mx6dl, we use pio mode instead of DMA mode on i.mx6dl.

Fixes: f62caccd (spi: spi-imx: add DMA support)
Signed-off-by: default avatarRobin Gong <b38343@freescale.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
parent 97bf6af1

drivers/spi/spi-imx.c

+4 −0
Original line number Original line Diff line number Diff line
@@ -823,6 +823,10 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx, 
	struct dma_slave_config slave_config = {};

	struct dma_slave_config slave_config = {};

	int ret;

	int ret;





	/* use pio mode for i.mx6dl chip TKT238285 */

	if (of_machine_is_compatible("fsl,imx6dl"))

		return 0;



	/* Prepare for TX DMA: */

	/* Prepare for TX DMA: */

	master->dma_tx = dma_request_slave_channel(dev, "tx");

	master->dma_tx = dma_request_slave_channel(dev, "tx");

	if (!master->dma_tx) {

	if (!master->dma_tx) {