1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/watchdog/atmel,sama5d4-wdt.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Atmel SAMA5D4 Watchdog Timer (WDT) Controller
8
9maintainers:
10  - Eugen Hristev <eugen.hristev@microchip.com>
11
12allOf:
13  - $ref: "watchdog.yaml#"
14
15properties:
16  compatible:
17    enum:
18      - atmel,sama5d4-wdt
19      - microchip,sam9x60-wdt
20
21  reg:
22    maxItems: 1
23
24  atmel,watchdog-type:
25    $ref: /schemas/types.yaml#/definitions/string
26    description: should be hardware or software.
27    oneOf:
28      - description:
29          Enable watchdog fault reset. A watchdog fault triggers
30          watchdog reset.
31        const: hardware
32      - description:
33          Enable watchdog fault interrupt. A watchdog fault asserts
34          watchdog interrupt.
35        const: software
36    default: hardware
37
38  atmel,idle-halt:
39    $ref: /schemas/types.yaml#/definitions/flag
40    description: |
41      present if you want to stop the watchdog when the CPU is in idle state.
42      CAUTION: This property should be used with care, it actually makes the
43      watchdog not counting when the CPU is in idle state, therefore the
44      watchdog reset time depends on mean CPU usage and will not reset at all
45      if the CPU stop working while it is in idle state, which is probably
46      not what you want.
47
48  atmel,dbg-halt:
49    $ref: /schemas/types.yaml#/definitions/flag
50    description: |
51      present if you want to stop the watchdog when the CPU is in debug state.
52
53required:
54  - compatible
55  - reg
56
57unevaluatedProperties: false
58
59examples:
60  - |
61    #include <dt-bindings/interrupt-controller/irq.h>
62
63    watchdog@fc068640 {
64      compatible = "atmel,sama5d4-wdt";
65      reg = <0xfc068640 0x10>;
66      interrupts = <4 IRQ_TYPE_LEVEL_HIGH 5>;
67      timeout-sec = <10>;
68      atmel,watchdog-type = "hardware";
69      atmel,dbg-halt;
70      atmel,idle-halt;
71    };
72
73...
74