xref: /linux/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml (revision 94901b7a74d82bfd30420f1d9d00898278fdc8bf) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/watchdog/fsl-imx-wdt.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Freescale i.MX Watchdog Timer (WDT) Controller
8
9maintainers:
10  - Shawn Guo <shawnguo@kernel.org>
11  - Sascha Hauer <s.hauer@pengutronix.de>
12  - Fabio Estevam <festevam@gmail.com>
13
14properties:
15  compatible:
16    oneOf:
17      - const: fsl,imx21-wdt
18      - items:
19          - enum:
20              - fsl,imx25-wdt
21              - fsl,imx27-wdt
22              - fsl,imx31-wdt
23              - fsl,imx35-wdt
24              - fsl,imx50-wdt
25              - fsl,imx51-wdt
26              - fsl,imx53-wdt
27              - fsl,imx6q-wdt
28              - fsl,imx6sl-wdt
29              - fsl,imx6sll-wdt
30              - fsl,imx6sx-wdt
31              - fsl,imx6ul-wdt
32              - fsl,imx7d-wdt
33              - fsl,imx8mm-wdt
34              - fsl,imx8mn-wdt
35              - fsl,imx8mp-wdt
36              - fsl,imx8mq-wdt
37              - fsl,ls1012a-wdt
38              - fsl,ls1043a-wdt
39              - fsl,vf610-wdt
40          - const: fsl,imx21-wdt
41
42  reg:
43    maxItems: 1
44
45  interrupts:
46    maxItems: 1
47
48  clocks:
49    maxItems: 1
50
51  big-endian: true
52
53  fsl,ext-reset-output:
54    $ref: /schemas/types.yaml#/definitions/flag
55    description: |
56      If present, the watchdog device is configured to assert its
57      external reset (WDOG_B) instead of issuing a software reset.
58
59  fsl,suspend-in-wait:
60    $ref: /schemas/types.yaml#/definitions/flag
61    description: |
62      If present, the watchdog device is suspended in WAIT mode
63      (Suspend-to-Idle). Only supported on certain devices.
64
65required:
66  - compatible
67  - interrupts
68  - reg
69
70allOf:
71  - $ref: watchdog.yaml#
72  - if:
73      not:
74        properties:
75          compatible:
76            contains:
77              enum:
78                - fsl,imx25-wdt
79                - fsl,imx35-wdt
80                - fsl,imx50-wdt
81                - fsl,imx51-wdt
82                - fsl,imx53-wdt
83                - fsl,imx6q-wdt
84                - fsl,imx6sl-wdt
85                - fsl,imx6sll-wdt
86                - fsl,imx6sx-wdt
87                - fsl,imx6ul-wdt
88                - fsl,imx7d-wdt
89                - fsl,imx8mm-wdt
90                - fsl,imx8mn-wdt
91                - fsl,imx8mp-wdt
92                - fsl,imx8mq-wdt
93                - fsl,vf610-wdt
94    then:
95      properties:
96        fsl,suspend-in-wait: false
97
98  - if:
99      not:
100        properties:
101          compatible:
102            contains:
103              enum:
104                - fsl,ls1012a-wdt
105                - fsl,ls1043a-wdt
106    then:
107      properties:
108        big-endian: false
109
110unevaluatedProperties: false
111
112examples:
113  - |
114    #include <dt-bindings/interrupt-controller/arm-gic.h>
115    #include <dt-bindings/clock/imx6qdl-clock.h>
116
117    watchdog@20bc000 {
118        compatible = "fsl,imx21-wdt";
119        reg = <0x020bc000 0x4000>;
120        interrupts = <0 80 IRQ_TYPE_LEVEL_HIGH>;
121        clocks = <&clks IMX6QDL_CLK_IPG>;
122    };
123
124...
125