xref: /linux/Documentation/devicetree/bindings/watchdog/mediatek,mtk-wdt.yaml (revision bf5802238dc181b1f7375d358af1d01cd72d1c11) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/watchdog/mediatek,mtk-wdt.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: MediaTek SoCs Watchdog timer
8
9maintainers:
10  - Matthias Brugger <matthias.bgg@gmail.com>
11
12description:
13  The watchdog supports a pre-timeout interrupt that fires
14  timeout-sec/2 before the expiry.
15
16allOf:
17  - $ref: watchdog.yaml#
18
19properties:
20  compatible:
21    oneOf:
22      - enum:
23          - mediatek,mt2712-wdt
24          - mediatek,mt6589-wdt
25          - mediatek,mt6735-wdt
26          - mediatek,mt6795-wdt
27          - mediatek,mt7986-wdt
28          - mediatek,mt7988-wdt
29          - mediatek,mt8183-wdt
30          - mediatek,mt8186-wdt
31          - mediatek,mt8188-wdt
32          - mediatek,mt8192-wdt
33          - mediatek,mt8195-wdt
34      - items:
35          - enum:
36              - mediatek,mt2701-wdt
37              - mediatek,mt6582-wdt
38              - mediatek,mt6797-wdt
39              - mediatek,mt7622-wdt
40              - mediatek,mt7623-wdt
41              - mediatek,mt7629-wdt
42              - mediatek,mt8173-wdt
43              - mediatek,mt8365-wdt
44              - mediatek,mt8516-wdt
45          - const: mediatek,mt6589-wdt
46
47  reg:
48    maxItems: 1
49
50  interrupts:
51    items:
52      - description: Watchdog pre-timeout (bark) interrupt
53
54  mediatek,disable-extrst:
55    description: Disable sending output reset signal
56    type: boolean
57
58  mediatek,reset-by-toprgu:
59    description: The Top Reset Generation Unit (TOPRGU) generates reset signals
60      and distributes them to each IP. If present, the watchdog timer will be
61      reset by TOPRGU once system resets.
62    type: boolean
63
64  '#reset-cells':
65    const: 1
66
67required:
68  - compatible
69  - reg
70
71unevaluatedProperties: false
72
73examples:
74  - |
75    #include <dt-bindings/interrupt-controller/arm-gic.h>
76
77    soc {
78        #address-cells = <2>;
79        #size-cells = <2>;
80
81        watchdog: watchdog@10007000 {
82            compatible = "mediatek,mt8183-wdt";
83            reg = <0 0x10007000 0 0x100>;
84            interrupts = <GIC_SPI 139 IRQ_TYPE_LEVEL_LOW>;
85            mediatek,disable-extrst;
86            timeout-sec = <10>;
87            #reset-cells = <1>;
88        };
89    };
90