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.
Signed-off-by: Robin Gong <[email protected]>
---
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 961b97d..fe1b769 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) {
--
1.9.1
On Tue, Feb 03, 2015 at 10:25:53AM +0800, Robin Gong wrote:
> 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.
Applied, thanks.