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soc: ixp4xx: Add DT bindings for IXP4xx NPE
This adds DT bindings for the Intel IXP4xx Network Processing Engine (NPE). These are three firmware-executing units found in the IXP4xx SoC. These bindings use YAML. Cc: devicetree@vger.kernel.org Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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# Copyright 2019 Linaro Ltd.
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%YAML 1.2
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---
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$id: "http://devicetree.org/schemas/firmware/intel-ixp4xx-network-processing-engine.yaml#"
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$schema: "http://devicetree.org/meta-schemas/core.yaml#"
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title: Intel IXP4xx Network Processing Engine
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maintainers:
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- Linus Walleij <linus.walleij@linaro.org>
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description: |
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On the IXP4xx SoCs, the Network Processing Engine (NPE) is a small
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processor that can load a firmware to perform offloading of networking
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and crypto tasks. It also manages the MDIO bus to the ethernet PHYs
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on the IXP4xx platform. All IXP4xx platforms have three NPEs at
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consecutive memory locations. They are all included in the same
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device node since they are not independent of each other.
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properties:
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compatible:
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oneOf:
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- items:
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- const: intel,ixp4xx-network-processing-engine
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reg:
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minItems: 3
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maxItems: 3
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items:
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- description: NPE0 register range
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- description: NPE1 register range
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- description: NPE2 register range
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required:
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- compatible
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- reg
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examples:
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- |
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npe@c8006000 {
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compatible = "intel,ixp4xx-network-processing-engine";
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reg = <0xc8006000 0x1000>, <0xc8007000 0x1000>, <0xc8008000 0x1000>;
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};
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