Commit a02bb401 authored Feb 03, 2015 by Robin Gong Committed by Mark Brown Feb 03, 2015

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: Robin Gong <b38343@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

parent 97bf6af1

drivers/spi/spi-imx.c

+4 −0

Original line number	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 = {};
		int ret;

		/* use pio mode for i.mx6dl chip TKT238285 */
		if (of_machine_is_compatible("fsl,imx6dl"))
		return 0;

		/* Prepare for TX DMA: */
		master->dma_tx = dma_request_slave_channel(dev, "tx");
		if (!master->dma_tx) {

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