Commit 86e673f7 authored by Amelie Delaunay's avatar Amelie Delaunay Committed by Vinod Koul
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dt-bindings: dma: add direct mode support through device tree in stm32-dma 



Direct mode or FIFO mode is computed by stm32-dma driver. Add a way for the
user to force direct mode, by setting bit 2 in the bitfield value
specifying DMA features in the device tree.

Signed-off-by: default avatarAmelie Delaunay <amelie.delaunay@st.com>
Link: https://lore.kernel.org/r/20200422102904.1448-2-amelie.delaunay@st.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 920c5974

Documentation/devicetree/bindings/dma/st,stm32-dma.yaml

+5 −0
Original line number Diff line number Diff line
@@ -36,6 +36,11 @@ description: | 
         0x1: 1/2 full FIFO

         0x2: 3/4 full FIFO

         0x3: full FIFO

       -bit 2: DMA direct mode

         0x0: FIFO mode with threshold selectable with bit 0-1

         0x1: Direct mode: each DMA request immediately initiates a transfer

              from/to the memory, FIFO is bypassed.





maintainers:

  - Amelie Delaunay <amelie.delaunay@st.com>