Messages in this thread Patch in this message | | | From | Amelie Delaunay <> | Subject | [PATCH 1/2] dt-bindings: dma: add direct mode support through device tree in stm32-dma | Date | Wed, 22 Apr 2020 12:29:03 +0200 |
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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: Amelie Delaunay <amelie.delaunay@st.com> --- Documentation/devicetree/bindings/dma/st,stm32-dma.yaml | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/dma/st,stm32-dma.yaml b/Documentation/devicetree/bindings/dma/st,stm32-dma.yaml index 0c0ac11ad55f..71987878e4ae 100644 --- a/Documentation/devicetree/bindings/dma/st,stm32-dma.yaml +++ b/Documentation/devicetree/bindings/dma/st,stm32-dma.yaml @@ -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> -- 2.17.1
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