Add DT binding document for Nvidia Tegra GPCDMA controller. Signed-off-by: Rajesh Gumasta <rgumasta@xxxxxxxxxx> Signed-off-by: Akhil R <akhilrajeev@xxxxxxxxxx> Reviewed-by: Jon Hunter <jonathanh@xxxxxxxxxx> --- .../bindings/dma/nvidia,tegra186-gpc-dma.yaml | 111 +++++++++++++++++++++ 1 file changed, 111 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml diff --git a/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml b/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml new file mode 100644 index 0000000..3a5a70d --- /dev/null +++ b/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml @@ -0,0 +1,111 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/nvidia,tegra186-gpc-dma.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVIDIA Tegra GPC DMA Controller Device Tree Bindings + +description: | + The Tegra General Purpose Central (GPC) DMA controller is used for faster + data transfers between memory to memory, memory to device and device to + memory. + +maintainers: + - Jon Hunter <jonathanh@xxxxxxxxxx> + - Rajesh Gumasta <rgumasta@xxxxxxxxxx> + +allOf: + - $ref: "dma-controller.yaml#" + +properties: + compatible: + oneOf: + - const: nvidia,tegra186-gpcdma + - items: + - const: nvidia,tegra186-gpcdma + - const: nvidia,tegra194-gpcdma + + "#dma-cells": + const: 1 + + reg: + maxItems: 1 + + interrupts: + description: + Should contain all of the per-channel DMA interrupts in + ascending order with respect to the DMA channel index. + minItems: 1 + maxItems: 32 + + resets: + maxItems: 1 + + reset-names: + const: gpcdma + + iommus: + maxItems: 1 + + dma-coherent: true + +required: + - compatible + - reg + - interrupts + - resets + - reset-names + - "#dma-cells" + - iommus + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/memory/tegra186-mc.h> + #include <dt-bindings/reset/tegra186-reset.h> + + dma-controller@2600000 { + compatible = "nvidia,tegra186-gpcdma"; + reg = <0x2600000 0x0>; + resets = <&bpmp TEGRA186_RESET_GPCDMA>; + reset-names = "gpcdma"; + interrupts = <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 79 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 81 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 93 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 99 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 104 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 105 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 106 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 107 IRQ_TYPE_LEVEL_HIGH>; + #dma-cells = <1>; + iommus = <&smmu TEGRA186_SID_GPCDMA_0>; + dma-coherent; + }; +... -- 2.7.4
