Add DT bindings document for Platform DMA(PDMA) driver of board, HiFive Unleashed Rev A00. Reviewed-by: Rob Herring <robh@xxxxxxxxxx> Reviewed-by: Pragnesh Patel <pragnesh.patel@xxxxxxxxxx> Signed-off-by: Green Wan <green.wan@xxxxxxxxxx> --- .../bindings/dma/sifive,fu540-c000-pdma.yaml | 55 +++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml diff --git a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml new file mode 100644 index 000000000000..2ca3ddbe1ff4 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/sifive,fu540-c000-pdma.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: SiFive Unleashed Rev C000 Platform DMA + +maintainers: + - Green Wan <green.wan@xxxxxxxxxx> + - Palmer Debbelt <palmer@xxxxxxxxxx> + - Paul Walmsley <paul.walmsley@xxxxxxxxxx> + +description: | + Platform DMA is a DMA engine of SiFive Unleashed. It supports 4 + channels. Each channel has 2 interrupts. One is for DMA done and + the other is for DME error. + + In different SoC, DMA could be attached to different IRQ line. + DT file need to be changed to meet the difference. For technical + doc, + + https://static.dev.sifive.com/FU540-C000-v1.0.pdf + +properties: + compatible: + items: + - const: sifive,fu540-c000-pdma + + reg: + maxItems: 1 + + interrupts: + minItems: 1 + maxItems: 8 + + '#dma-cells': + const: 1 + +required: + - compatible + - reg + - interrupts + - '#dma-cells' + +examples: + - | + dma@3000000 { + compatible = "sifive,fu540-c000-pdma"; + reg = <0x0 0x3000000 0x0 0x8000>; + interrupts = <23 24 25 26 27 28 29 30>; + #dma-cells = <1>; + }; + +... -- 2.17.1
