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      - microchip,sama7g5-wdt
21
22  reg:
23    maxItems: 1
24
25  atmel,watchdog-type:
26    $ref: /schemas/types.yaml#/definitions/string
27    description: should be hardware or software.
28    oneOf:
29      - description:
30          Enable watchdog fault reset. A watchdog fault triggers
31          watchdog reset.
32        const: hardware
33      - description:
34          Enable watchdog fault interrupt. A watchdog fault asserts
35          watchdog interrupt.
36        const: software
37    default: hardware
38
39  atmel,idle-halt:
40    $ref: /schemas/types.yaml#/definitions/flag
41    description: |
42      present if you want to stop the watchdog when the CPU is in idle state.
43      CAUTION: This property should be used with care, it actually makes the
44      watchdog not counting when the CPU is in idle state, therefore the
45      watchdog reset time depends on mean CPU usage and will not reset at all
46      if the CPU stop working while it is in idle state, which is probably
47      not what you want.
48
49  atmel,dbg-halt:
50    $ref: /schemas/types.yaml#/definitions/flag
51    description: |
52      present if you want to stop the watchdog when the CPU is in debug state.
53
54required:
55  - compatible
56  - reg
57
58unevaluatedProperties: false
59
60examples:
61  - |
62    #include <dt-bindings/interrupt-controller/irq.h>
63
64    watchdog@fc068640 {
65      compatible = "atmel,sama5d4-wdt";
66      reg = <0xfc068640 0x10>;
67      interrupts = <4 IRQ_TYPE_LEVEL_HIGH 5>;
68      timeout-sec = <10>;
69      atmel,watchdog-type = "hardware";
70      atmel,dbg-halt;
71      atmel,idle-halt;
72    };
73
74...
75