* [PATCH v1] spi: imx: use pio mode for i.mx6dl
@ 2015-02-03 2:25 Robin Gong
2015-02-03 12:18 ` Mark Brown
0 siblings, 1 reply; 2+ messages in thread
From: Robin Gong @ 2015-02-03 2:25 UTC (permalink / raw)
To: broonie, l.stach, shawn.guo
Cc: Frank.Li, Fabio.Estevam, hs, linux-spi, linux-kernel
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 <b38343@freescale.com>
---
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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v1] spi: imx: use pio mode for i.mx6dl
2015-02-03 2:25 [PATCH v1] spi: imx: use pio mode for i.mx6dl Robin Gong
@ 2015-02-03 12:18 ` Mark Brown
0 siblings, 0 replies; 2+ messages in thread
From: Mark Brown @ 2015-02-03 12:18 UTC (permalink / raw)
To: Robin Gong
Cc: l.stach, shawn.guo, Frank.Li, Fabio.Estevam, hs, linux-spi, linux-kernel
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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.
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