xref: /linux/Documentation/devicetree/bindings/arm/amlogic/amlogic,meson-gx-ao-secure.yaml (revision a6021aa24f6417416d93318bbfa022ab229c33c8) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2# Copyright 2019 BayLibre, SAS
3%YAML 1.2
4---
5$id: http://devicetree.org/schemas/arm/amlogic/amlogic,meson-gx-ao-secure.yaml#
6$schema: http://devicetree.org/meta-schemas/core.yaml#
7
8title: Amlogic Meson Firmware registers Interface
9
10maintainers:
11  - Neil Armstrong <neil.armstrong@linaro.org>
12
13description: |
14  The Meson SoCs have a register bank with status and data shared with the
15  secure firmware.
16
17# We need a select here so we don't match all nodes with 'syscon'
18select:
19  properties:
20    compatible:
21      contains:
22        const: amlogic,meson-gx-ao-secure
23  required:
24    - compatible
25
26properties:
27  compatible:
28    oneOf:
29      - items:
30          - const: amlogic,meson-gx-ao-secure
31          - const: syscon
32      - items:
33          - enum:
34              - amlogic,a4-ao-secure
35              - amlogic,c3-ao-secure
36              - amlogic,s4-ao-secure
37              - amlogic,t7-ao-secure
38          - const: amlogic,meson-gx-ao-secure
39          - const: syscon
40  reg:
41    maxItems: 1
42
43  amlogic,has-chip-id:
44    description: |
45      A firmware register encodes the SoC type, package and revision
46      information on the Meson GX SoCs. If present, the interface gives
47      the current SoC version.
48    type: boolean
49
50required:
51  - compatible
52  - reg
53
54additionalProperties: false
55
56examples:
57  - |
58    ao-secure@140 {
59          compatible = "amlogic,meson-gx-ao-secure", "syscon";
60          reg = <0x140 0x140>;
61          amlogic,has-chip-id;
62    };
63