SHDMA uses only standard DMA Device Tree bindings. This patch adds documentation, exactly describing the use of the bindings and providing examples.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+rene...@gmail.com> --- This patch adds the missing documentation to the patch series "DMA: shdma: add Device Tree support" http://thread.gmane.org/gmane.linux.ports.sh.devel/21972 Arnd, Vinod, I hope, now this series can be applied :) Documentation/devicetree/bindings/dma/shdma.txt | 61 +++++++++++++++++++++++ 1 files changed, 61 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/dma/shdma.txt diff --git a/Documentation/devicetree/bindings/dma/shdma.txt b/Documentation/devicetree/bindings/dma/shdma.txt new file mode 100644 index 0000000..f99618e --- /dev/null +++ b/Documentation/devicetree/bindings/dma/shdma.txt @@ -0,0 +1,61 @@ +* SHDMA Device Tree bindings + +Only generic DMA controller bindings are used for SHDMA DT nodes. + +* DMA controller + +Required properties: +- compatible: should be "renesas,shdma" +- #dma-cells: should be <1>, see "dmas" property below + +Optional properties (currently unused): +- dma-channels: number of DMA channels +- dma-requests: number of DMA request signals + +Example: + dma0: shdma@fe000020 { + compatible = "renesas,shdma"; + reg = <0xfe000020 0x89e0>; + interrupt-parent = <&gic>; + interrupts = <0 129 4 + 0 109 4 + 0 110 4 + 0 111 4 + 0 112 4 + 0 113 4 + 0 114 4 + 0 115 4 + 0 116 4 + 0 117 4 + 0 118 4 + 0 119 4 + 0 120 4 + 0 121 4 + 0 122 4 + 0 123 4 + 0 124 4 + 0 125 4 + 0 126 4 + 0 127 4 + 0 128 4>; + interrupt-names = "error", + "ch0", "ch1", "ch2", "ch3", + "ch4", "ch5", "ch6", "ch7", + "ch8", "ch9", "ch10", "ch11", + "ch12", "ch13", "ch14", "ch15", + "ch16", "ch17", "ch18", "ch19"; + #dma-cells = <1>; + dma-channels = <20>; + dma-requests = <256>; + }; + +* DMA client + +Required properties: +- dmas: a list of <[DMA controller phandle] [MID/RID value]> pairs +- dma-names: a list of DMA channel names, one per "dmas" entry + +Example: + dmas = <&dma0 0xd1 + &dma0 0xd2>; + dma-names = "tx", "rx"; -- 1.7.2.5 _______________________________________________ devicetree-discuss mailing list devicetree-discuss@lists.ozlabs.org https://lists.ozlabs.org/listinfo/devicetree-discuss
