xref: /linux/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml (revision 18f0817d2e9af479a40a1be4d83a849894d6b3f8) 
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,vf610-wdt
41          - const: fsl,imx21-wdt
42
43  reg:
44    maxItems: 1
45
46  interrupts:
47    maxItems: 1
48
49  clocks:
50    maxItems: 1
51
52  big-endian: true
53
54  fsl,ext-reset-output:
55    $ref: /schemas/types.yaml#/definitions/flag
56    description: |
57      If present, the watchdog device is configured to assert its
58      external reset (WDOG_B) instead of issuing a software reset.
59
60  fsl,suspend-in-wait:
61    $ref: /schemas/types.yaml#/definitions/flag
62    description: |
63      If present, the watchdog device is suspended in WAIT mode
64      (Suspend-to-Idle). Only supported on certain devices.
65
66required:
67  - compatible
68  - interrupts
69  - reg
70
71allOf:
72  - $ref: watchdog.yaml#
73  - if:
74      not:
75        properties:
76          compatible:
77            contains:
78              enum:
79                - fsl,imx25-wdt
80                - fsl,imx35-wdt
81                - fsl,imx50-wdt
82                - fsl,imx51-wdt
83                - fsl,imx53-wdt
84                - fsl,imx6q-wdt
85                - fsl,imx6sl-wdt
86                - fsl,imx6sll-wdt
87                - fsl,imx6sx-wdt
88                - fsl,imx6ul-wdt
89                - fsl,imx7d-wdt
90                - fsl,imx8mm-wdt
91                - fsl,imx8mn-wdt
92                - fsl,imx8mp-wdt
93                - fsl,imx8mq-wdt
94                - fsl,vf610-wdt
95    then:
96      properties:
97        fsl,suspend-in-wait: false
98
99  - if:
100      not:
101        properties:
102          compatible:
103            contains:
104              enum:
105                - fsl,ls1012a-wdt
106                - fsl,ls1021a-wdt
107                - fsl,ls1043a-wdt
108    then:
109      properties:
110        big-endian: false
111
112unevaluatedProperties: false
113
114examples:
115  - |
116    #include <dt-bindings/interrupt-controller/arm-gic.h>
117    #include <dt-bindings/clock/imx6qdl-clock.h>
118
119    watchdog@20bc000 {
120        compatible = "fsl,imx21-wdt";
121        reg = <0x020bc000 0x4000>;
122        interrupts = <0 80 IRQ_TYPE_LEVEL_HIGH>;
123        clocks = <&clks IMX6QDL_CLK_IPG>;
124    };
125
126...
127