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1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)2# Copyright 2019 Linaro Ltd.3%YAML 1.24---5$id: http://devicetree.org/schemas/firmware/intel,ixp4xx-network-processing-engine.yaml#6$schema: http://devicetree.org/meta-schemas/core.yaml#7 8title: Intel IXP4xx Network Processing Engine9 10maintainers:11 - Linus Walleij <linus.walleij@linaro.org>12 13description: |14 On the IXP4xx SoCs, the Network Processing Engine (NPE) is a small15 processor that can load a firmware to perform offloading of networking16 and crypto tasks. It also manages the MDIO bus to the ethernet PHYs17 on the IXP4xx platform. All IXP4xx platforms have three NPEs at18 consecutive memory locations. They are all included in the same19 device node since they are not independent of each other.20 21properties:22 compatible:23 oneOf:24 - items:25 - const: intel,ixp4xx-network-processing-engine26 27 reg:28 items:29 - description: NPE0 (NPE-A) register range30 - description: NPE1 (NPE-B) register range31 - description: NPE2 (NPE-C) register range32 33 crypto:34 $ref: /schemas/crypto/intel,ixp4xx-crypto.yaml#35 type: object36 description: Optional node for the embedded crypto engine, the node37 should be named with the instance number of the NPE engine used for38 the crypto engine.39 40 "#address-cells":41 const: 142 43 "#size-cells":44 const: 045 46patternProperties:47 hss@[0-9]+$:48 $ref: /schemas/net/intel,ixp4xx-hss.yaml#49 type: object50 description: Optional node for the High Speed Serial link (HSS), the51 node should be named with the instance number of the NPE engine52 used for the HSS.53 54required:55 - compatible56 - reg57 58additionalProperties: false59 60examples:61 - |62 #include <dt-bindings/gpio/gpio.h>63 64 npe: npe@c8006000 {65 compatible = "intel,ixp4xx-network-processing-engine";66 reg = <0xc8006000 0x1000>, <0xc8007000 0x1000>, <0xc8008000 0x1000>;67 #address-cells = <1>;68 #size-cells = <0>;69 70 hss@0 {71 compatible = "intel,ixp4xx-hss";72 reg = <0>;73 intel,npe-handle = <&npe 0>;74 intel,queue-chl-rxtrig = <&qmgr 12>;75 intel,queue-chl-txready = <&qmgr 34>;76 intel,queue-pkt-rx = <&qmgr 13>;77 intel,queue-pkt-tx = <&qmgr 14>, <&qmgr 15>, <&qmgr 16>, <&qmgr 17>;78 intel,queue-pkt-rxfree = <&qmgr 18>, <&qmgr 19>, <&qmgr 20>, <&qmgr 21>;79 intel,queue-pkt-txdone = <&qmgr 22>;80 cts-gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;81 rts-gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;82 dcd-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;83 dtr-gpios = <&gpio_74 2 GPIO_ACTIVE_LOW>;84 clk-internal-gpios = <&gpio_74 0 GPIO_ACTIVE_HIGH>;85 };86 87 crypto {88 compatible = "intel,ixp4xx-crypto";89 intel,npe-handle = <&npe 2>;90 queue-rx = <&qmgr 30>;91 queue-txready = <&qmgr 29>;92 };93 };94...95