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spi: imx: use pio mode for i.mx6dl

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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: f62caccd12 (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
This commit is contained in:
Robin Gong 2015-02-03 10:25:53 +08:00 committed by Mark Brown
parent 97bf6af1f9
commit a02bb401f8
1 changed files with 4 additions and 0 deletions
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4
drivers/spi/spi-imx.c
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@ -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) {