xref: /linux/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml (revision 77e67d5daaf155f7d0f99f4e797c4842169ec19e) 
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,ls1021a-wdt
39              - fsl,ls1043a-wdt
40              - fsl,ls1046a-wdt
41              - fsl,vf610-wdt
42          - const: fsl,imx21-wdt
43
44  reg:
45    maxItems: 1
46
47  interrupts:
48    maxItems: 1
49
50  clocks:
51    maxItems: 1
52
53  big-endian: true
54
55  fsl,ext-reset-output:
56    $ref: /schemas/types.yaml#/definitions/flag
57    description: |
58      If present, the watchdog device is configured to assert its
59      external reset (WDOG_B) instead of issuing a software reset.
60
61  fsl,suspend-in-wait:
62    $ref: /schemas/types.yaml#/definitions/flag
63    description: |
64      If present, the watchdog device is suspended in WAIT mode
65      (Suspend-to-Idle). Only supported on certain devices.
66
67required:
68  - compatible
69  - interrupts
70  - reg
71
72allOf:
73  - $ref: watchdog.yaml#
74  - if:
75      not:
76        properties:
77          compatible:
78            contains:
79              enum:
80                - fsl,imx25-wdt
81                - fsl,imx35-wdt
82                - fsl,imx50-wdt
83                - fsl,imx51-wdt
84                - fsl,imx53-wdt
85                - fsl,imx6q-wdt
86                - fsl,imx6sl-wdt
87                - fsl,imx6sll-wdt
88                - fsl,imx6sx-wdt
89                - fsl,imx6ul-wdt
90                - fsl,imx7d-wdt
91                - fsl,imx8mm-wdt
92                - fsl,imx8mn-wdt
93                - fsl,imx8mp-wdt
94                - fsl,imx8mq-wdt
95                - fsl,vf610-wdt
96    then:
97      properties:
98        fsl,suspend-in-wait: false
99
100  - if:
101      not:
102        properties:
103          compatible:
104            contains:
105              enum:
106                - fsl,ls1012a-wdt
107                - fsl,ls1021a-wdt
108                - fsl,ls1043a-wdt
109                - fsl,ls1046a-wdt
110    then:
111      properties:
112        big-endian: false
113
114unevaluatedProperties: false
115
116examples:
117  - |
118    #include <dt-bindings/interrupt-controller/arm-gic.h>
119    #include <dt-bindings/clock/imx6qdl-clock.h>
120
121    watchdog@20bc000 {
122        compatible = "fsl,imx21-wdt";
123        reg = <0x020bc000 0x4000>;
124        interrupts = <0 80 IRQ_TYPE_LEVEL_HIGH>;
125        clocks = <&clks IMX6QDL_CLK_IPG>;
126    };
127
128...
129