xref: /linux/Documentation/devicetree/bindings/firmware/intel,ixp4xx-network-processing-engine.yaml (revision a1c613ae4c322ddd58d5a8539dbfba2a0380a8c0) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2# Copyright 2019 Linaro Ltd.
3%YAML 1.2
4---
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 Engine
9
10maintainers:
11  - Linus Walleij <linus.walleij@linaro.org>
12
13description: |
14  On the IXP4xx SoCs, the Network Processing Engine (NPE) is a small
15  processor that can load a firmware to perform offloading of networking
16  and crypto tasks. It also manages the MDIO bus to the ethernet PHYs
17  on the IXP4xx platform. All IXP4xx platforms have three NPEs at
18  consecutive memory locations. They are all included in the same
19  device node since they are not independent of each other.
20
21properties:
22  compatible:
23    oneOf:
24      - items:
25          - const: intel,ixp4xx-network-processing-engine
26
27  reg:
28    items:
29      - description: NPE0 (NPE-A) register range
30      - description: NPE1 (NPE-B) register range
31      - description: NPE2 (NPE-C) register range
32
33  crypto:
34    $ref: /schemas/crypto/intel,ixp4xx-crypto.yaml#
35    type: object
36    description: Optional node for the embedded crypto engine, the node
37      should be named with the instance number of the NPE engine used for
38      the crypto engine.
39
40  "#address-cells":
41    const: 1
42
43  "#size-cells":
44    const: 0
45
46patternProperties:
47  hss@[0-9]+$:
48    $ref: /schemas/net/intel,ixp4xx-hss.yaml#
49    type: object
50    description: Optional node for the High Speed Serial link (HSS), the
51      node should be named with the instance number of the NPE engine
52      used for the HSS.
53
54required:
55  - compatible
56  - reg
57
58additionalProperties: false
59
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