5.4-stable review patch. If anyone has any objections, please let me know.
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From: Ralf Schlatterbeck rsc@runtux.com
commit 269e31aecdd0b70f53a05def79480f15cbcc0fd6 upstream.
There was a change in the mxs-dma engine that uses a new custom flag. The change was not applied to the mxs spi driver. This results in chipselect being deasserted too early. This fixes the chipselect problem by using the new flag in the mxs-spi driver.
Fixes: ceeeb99cd821 ("dmaengine: mxs: rename custom flag") Signed-off-by: Ralf Schlatterbeck rsc@runtux.com Link: https://msgid.link/r/20240202115330.wxkbfmvd76sy3a6a@runtux.com Signed-off-by: Mark Brown broonie@kernel.org Cc: Stefan Wahren wahrenst@gmx.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/spi/spi-mxs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/spi/spi-mxs.c +++ b/drivers/spi/spi-mxs.c @@ -40,6 +40,7 @@ #include <linux/spi/spi.h> #include <linux/spi/mxs-spi.h> #include <trace/events/spi.h> +#include <linux/dma/mxs-dma.h>
#define DRIVER_NAME "mxs-spi"
@@ -253,7 +254,7 @@ static int mxs_spi_txrx_dma(struct mxs_s desc = dmaengine_prep_slave_sg(ssp->dmach, &dma_xfer[sg_count].sg, 1, (flags & TXRX_WRITE) ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM, - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + DMA_PREP_INTERRUPT | MXS_DMA_CTRL_WAIT4END);
if (!desc) { dev_err(ssp->dev,