On 16/09/2021 13:18, Akhil R wrote:
Add DT binding document for Nvidia Tegra GPCDMA controller. Signed-off-by: Rajesh Gumasta <rgumasta@xxxxxxxxxx> Signed-off-by: Akhil R <akhilrajeev@xxxxxxxxxx> --- .../bindings/dma/nvidia,tegra186-gpc-dma.yaml | 107 +++++++++++++++++++++ 1 file changed, 107 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..cf76afb --- /dev/null +++ b/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml @@ -0,0 +1,107 @@ +# 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 Genernal 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: + "#dma-cells": + const: 1 + + compatible: + - enum: + - nvidia,tegra186-gpcdma + - nvidia,tegra194-gpcdma + + reg: + maxItems: 1 + + interrupts: + minItems: 1 + maxItems: 32 + + resets: + maxItems: 1 + + reset-names: + const: gpcdma + + iommus: + maxItems: 1 + + nvidia,stream-id: + description: | + stream-id corresponding to GPC DMA clients. + Defaults to TEGRA186_SID_GPCDMA_0 if not given
Does the value programmed here always match that, that is specified in the iommus property? If so we should not need this property.
Jon -- nvpublic
