From 50454acaac63c4dea03a765242eb0d662a4fc383 Mon Sep 17 00:00:00 2001 From: Manivannan Sadhasivam Date: Thu, 26 Jul 2018 10:36:55 +0530 Subject: dt-bindings: dmaengine: Add binding for Actions Semi Owl SoCs Add devicetree binding for Actions Semi Owl SoCs DMA controller. Signed-off-by: Manivannan Sadhasivam Reviewed-by: Rob Herring Signed-off-by: Vinod Koul --- Documentation/devicetree/bindings/dma/owl-dma.txt | 47 +++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/owl-dma.txt diff --git a/Documentation/devicetree/bindings/dma/owl-dma.txt b/Documentation/devicetree/bindings/dma/owl-dma.txt new file mode 100644 index 000000000000..03e9bb12b75f --- /dev/null +++ b/Documentation/devicetree/bindings/dma/owl-dma.txt @@ -0,0 +1,47 @@ +* Actions Semi Owl SoCs DMA controller + +This binding follows the generic DMA bindings defined in dma.txt. + +Required properties: +- compatible: Should be "actions,s900-dma". +- reg: Should contain DMA registers location and length. +- interrupts: Should contain 4 interrupts shared by all channel. +- #dma-cells: Must be <1>. Used to represent the number of integer + cells in the dmas property of client device. +- dma-channels: Physical channels supported. +- dma-requests: Number of DMA request signals supported by the controller. + Refer to Documentation/devicetree/bindings/dma/dma.txt +- clocks: Phandle and Specifier of the clock feeding the DMA controller. + +Example: + +Controller: + dma: dma-controller@e0260000 { + compatible = "actions,s900-dma"; + reg = <0x0 0xe0260000 0x0 0x1000>; + interrupts = , + , + , + ; + #dma-cells = <1>; + dma-channels = <12>; + dma-requests = <46>; + clocks = <&clock CLK_DMAC>; + }; + +Client: + +DMA clients connected to the Actions Semi Owl SoCs DMA controller must +use the format described in the dma.txt file, using a two-cell specifier +for each channel. + +The two cells in order are: +1. A phandle pointing to the DMA controller. +2. The channel id. + +uart5: serial@e012a000 { + ... + dma-names = "tx", "rx"; + dmas = <&dma 26>, <&dma 27>; + ... +}; -- cgit v1.2.1