diff options
| author | Robin Gong <b38343@freescale.com> | 2015-02-03 10:25:53 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-02-11 15:00:51 +0800 |
| commit | 0ee291a9b487015768465cfbf90366a43941a685 (patch) | |
| tree | c2a0ec44a6b1b972838fdae4a914df452405f4b9 | |
| parent | 6fe528da404537cece61038adffe85181159f22f (diff) | |
| download | lwn-0ee291a9b487015768465cfbf90366a43941a685.tar.gz lwn-0ee291a9b487015768465cfbf90366a43941a685.zip | |
spi: imx: use pio mode for i.mx6dl
commit a02bb401f8ae264be782ee57d98bdd99f14c8022 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/spi/spi-imx.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 3637847b5370..82269a86fd7a 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) { |