xref: /linux/Documentation/devicetree/bindings/watchdog/starfive,jh7100-wdt.yaml (revision ae22a94997b8a03dcb3c922857c203246711f9d4) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/watchdog/starfive,jh7100-wdt.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: StarFive Watchdog for JH7100 and JH7110 SoC
8
9maintainers:
10  - Xingyu Wu <xingyu.wu@starfivetech.com>
11  - Samin Guo <samin.guo@starfivetech.com>
12
13description:
14  The JH7100 and JH7110 watchdog both are 32 bit counters. JH7100 watchdog
15  has only one timeout phase and reboots. And JH7110 watchdog has two
16  timeout phases. At the first phase, the signal of watchdog interrupt
17  output(WDOGINT) will rise when counter is 0. The counter will reload
18  the timeout value. And then, if counter decreases to 0 again and WDOGINT
19  isn't cleared, the watchdog will reset the system unless the watchdog
20  reset is disabled.
21
22properties:
23  compatible:
24    oneOf:
25      - enum:
26          - starfive,jh7100-wdt
27          - starfive,jh7110-wdt
28      - items:
29          - enum:
30              - starfive,jh8100-wdt
31          - const: starfive,jh7110-wdt
32
33  reg:
34    maxItems: 1
35
36  interrupts:
37    maxItems: 1
38
39  clocks:
40    items:
41      - description: APB clock
42      - description: Core clock
43
44  clock-names:
45    items:
46      - const: apb
47      - const: core
48
49  resets:
50    minItems: 1
51    maxItems: 2
52
53required:
54  - compatible
55  - reg
56  - clocks
57  - clock-names
58  - resets
59
60allOf:
61  - $ref: watchdog.yaml#
62
63  - if:
64      properties:
65        compatible:
66          contains:
67            enum:
68              - starfive,jh8100-wdt
69    then:
70      properties:
71        resets:
72          items:
73            - description: Core reset
74    else:
75      properties:
76        resets:
77          items:
78            - description: APB reset
79            - description: Core reset
80
81unevaluatedProperties: false
82
83examples:
84  - |
85    watchdog@12480000 {
86        compatible = "starfive,jh7100-wdt";
87        reg = <0x12480000 0x10000>;
88        clocks = <&clk 171>,
89                 <&clk 172>;
90        clock-names = "apb", "core";
91        resets = <&rst 99>,
92                 <&rst 100>;
93    };
94