0001 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
0002 # Copyright 2019 Linaro Ltd.
0003 %YAML 1.2
0004 ---
0005 $id: "http://devicetree.org/schemas/firmware/intel,ixp4xx-network-processing-engine.yaml#"
0006 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
0007
0008 title: Intel IXP4xx Network Processing Engine
0009
0010 maintainers:
0011 - Linus Walleij <linus.walleij@linaro.org>
0012
0013 description: |
0014 On the IXP4xx SoCs, the Network Processing Engine (NPE) is a small
0015 processor that can load a firmware to perform offloading of networking
0016 and crypto tasks. It also manages the MDIO bus to the ethernet PHYs
0017 on the IXP4xx platform. All IXP4xx platforms have three NPEs at
0018 consecutive memory locations. They are all included in the same
0019 device node since they are not independent of each other.
0020
0021 properties:
0022 compatible:
0023 oneOf:
0024 - items:
0025 - const: intel,ixp4xx-network-processing-engine
0026
0027 reg:
0028 items:
0029 - description: NPE0 (NPE-A) register range
0030 - description: NPE1 (NPE-B) register range
0031 - description: NPE2 (NPE-C) register range
0032
0033 crypto:
0034 $ref: /schemas/crypto/intel,ixp4xx-crypto.yaml#
0035 type: object
0036 description: Optional node for the embedded crypto engine, the node
0037 should be named with the instance number of the NPE engine used for
0038 the crypto engine.
0039
0040 "#address-cells":
0041 const: 1
0042
0043 "#size-cells":
0044 const: 0
0045
0046 patternProperties:
0047 hss@[0-9]+$:
0048 $ref: /schemas/net/intel,ixp4xx-hss.yaml#
0049 type: object
0050 description: Optional node for the High Speed Serial link (HSS), the
0051 node should be named with the instance number of the NPE engine
0052 used for the HSS.
0053
0054 required:
0055 - compatible
0056 - reg
0057
0058 additionalProperties: false
0059
0060 examples:
0061 - |
0062 #include <dt-bindings/gpio/gpio.h>
0063
0064 npe: npe@c8006000 {
0065 compatible = "intel,ixp4xx-network-processing-engine";
0066 reg = <0xc8006000 0x1000>, <0xc8007000 0x1000>, <0xc8008000 0x1000>;
0067 #address-cells = <1>;
0068 #size-cells = <0>;
0069
0070 hss@0 {
0071 compatible = "intel,ixp4xx-hss";
0072 reg = <0>;
0073 intel,npe-handle = <&npe 0>;
0074 intel,queue-chl-rxtrig = <&qmgr 12>;
0075 intel,queue-chl-txready = <&qmgr 34>;
0076 intel,queue-pkt-rx = <&qmgr 13>;
0077 intel,queue-pkt-tx = <&qmgr 14>, <&qmgr 15>, <&qmgr 16>, <&qmgr 17>;
0078 intel,queue-pkt-rxfree = <&qmgr 18>, <&qmgr 19>, <&qmgr 20>, <&qmgr 21>;
0079 intel,queue-pkt-txdone = <&qmgr 22>;
0080 cts-gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
0081 rts-gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
0082 dcd-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
0083 dtr-gpios = <&gpio_74 2 GPIO_ACTIVE_LOW>;
0084 clk-internal-gpios = <&gpio_74 0 GPIO_ACTIVE_HIGH>;
0085 };
0086
0087 crypto {
0088 compatible = "intel,ixp4xx-crypto";
0089 intel,npe-handle = <&npe 2>;
0090 queue-rx = <&qmgr 30>;
0091 queue-txready = <&qmgr 29>;
0092 };
0093 };
0094 ...
