Eric Lee / smarc-ti-linux-kernel

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Commit 0ee291a9b487015768465cfbf90366a43941a685

Authored by Robin Gong
Committed by Greg Kroah-Hartman
1 parent 6fe528da40

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>

Showing 1 changed file with 4 additions and 0 deletions Side-by-side Diff

drivers/spi/spi-imx.c
Diff comments   View file @ 0ee291a
... ... @@ -823,6 +823,10 @@
823 823 struct dma_slave_config slave_config = {};
824 824 int ret;
825 825  
  826 + /* use pio mode for i.mx6dl chip TKT238285 */
  827 + if (of_machine_is_compatible("fsl,imx6dl"))
  828 + return 0;
  829 +
826 830 /* Prepare for TX DMA: */
827 831 master->dma_tx = dma_request_slave_channel(dev, "tx");
828 832 if (!master->dma_tx) {