Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0ee291a9 authored by Robin Gong's avatar Robin Gong Committed by Greg Kroah-Hartman
Browse files

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: f62caccd (spi: spi-imx: add DMA support)
Signed-off-by: default avatarRobin Gong <b38343@freescale.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6fe528da

drivers/spi/spi-imx.c

+4 −0
Original line number Diff line number Diff line
@@ -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) {