From a02bb401f8ae264be782ee57d98bdd99f14c8022 Mon Sep 17 00:00:00 2001 From: Robin Gong Date: Tue, 3 Feb 2015 10:25:53 +0800 Subject: 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: f62caccd12c17e4 (spi: spi-imx: add DMA support) Signed-off-by: Robin Gong Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- drivers/spi/spi-imx.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 961b97d43b43..fe1b7699fab6 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -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) { -- cgit v1.2.3