[PATCH v4 1/2] dt-bindings: dmaengine: add DT binding for UniPhier MIO DMAC
From: Masahiro Yamada <hidden>
Date: 2018-10-11 16:42:09
Also in:
dmaengine, linux-devicetree, lkml
Subsystem:
dma generic offload engine subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Vinod Koul, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
The MIO DMAC (Media IO DMA Controller) is used in UniPhier LD4, Pro4, and sLD8 SoCs. Signed-off-by: Masahiro Yamada <redacted> Reviewed-by: Rob Herring <robh@kernel.org> --- Changes in v4: None Changes in v3: - Add Rob's Reviewed-by Changes in v2: - Rename the node "dmac" to "dma-controller" - Remove dma-channels property .../devicetree/bindings/dma/uniphier-mio-dmac.txt | 25 ++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/uniphier-mio-dmac.txt
diff --git a/Documentation/devicetree/bindings/dma/uniphier-mio-dmac.txt b/Documentation/devicetree/bindings/dma/uniphier-mio-dmac.txt
new file mode 100644
index 0000000..b12388d
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/uniphier-mio-dmac.txt@@ -0,0 +1,25 @@ +UniPhier Media IO DMA controller + +This works as an external DMA engine for SD/eMMC controllers etc. +found in UniPhier LD4, Pro4, sLD8 SoCs. + +Required properties: +- compatible: should be "socionext,uniphier-mio-dmac". +- reg: offset and length of the register set for the device. +- interrupts: a list of interrupt specifiers associated with the DMA channels. +- clocks: a single clock specifier. +- #dma-cells: should be <1>. The single cell represents the channel index. + +Example: + dmac: dma-controller at 5a000000 { + compatible = "socionext,uniphier-mio-dmac"; + reg = <0x5a000000 0x1000>; + interrupts = <0 68 4>, <0 68 4>, <0 69 4>, <0 70 4>, + <0 71 4>, <0 72 4>, <0 73 4>, <0 74 4>; + clocks = <&mio_clk 7>; + #dma-cells = <1>; + }; + +Note: +In the example above, "interrupts = <0 68 4>, <0 68 4>, ..." is not a typo. +The first two channels share a single interrupt line.
--
2.7.4