Messages in this thread | | | Subject | Re: [PATCH v5 1/4] dt-bindings: dmaengine: Add doc for tegra gpcdma | From | Jon Hunter <> | Date | Thu, 16 Sep 2021 15:30:49 +0100 |
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On 16/09/2021 13:18, Akhil R wrote: > Add DT binding document for Nvidia Tegra GPCDMA controller. > > Signed-off-by: Rajesh Gumasta <rgumasta@nvidia.com> > Signed-off-by: Akhil R <akhilrajeev@nvidia.com> > --- > .../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@nvidia.com> > + - Rajesh Gumasta <rgumasta@nvidia.com> > + > +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
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