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authorRobin Gong <b38343@freescale.com>2015-02-03 10:25:53 +0800
committerMark Brown <broonie@kernel.org>2015-02-03 12:17:01 +0000
commita02bb401f8ae264be782ee57d98bdd99f14c8022 (patch)
tree9a58706af54e86e93776be55543745b6d2e98f57
parent97bf6af1f928216fd6c5a66e8a57bfa95a659672 (diff)
downloadlinux-stericsson-a02bb401f8ae264be782ee57d98bdd99f14c8022.tar.gz
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 <b38343@freescale.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
-rw-r--r--drivers/spi/spi-imx.c4
1 files changed, 4 insertions, 0 deletions
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) {