dmaengine: stm32-dma: add copy_align constraint

This patch adds copy_align property in accordance with hardware
restriction.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Link: https://lore.kernel.org/r/20200129153628.29329-7-amelie.delaunay@st.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c
index b7e18cf..01a2374 100644 (file)
--- a/drivers/dma/stm32-dma.c
+++ b/drivers/dma/stm32-dma.c
@@ -1345,6 +1345,7 @@ static int stm32_dma_probe(struct platform_device *pdev)
                BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
        dd->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
        dd->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
+       dd->copy_align = DMAENGINE_ALIGN_32_BYTES;
        dd->max_burst = STM32_DMA_MAX_BURST;
        dd->descriptor_reuse = true;
        dd->dev = &pdev->dev;