xref: /linux/Documentation/devicetree/bindings/watchdog/atmel,sama5d4-wdt.yaml (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80) 
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    oneOf:
18      - enum:
19          - atmel,sama5d4-wdt
20          - microchip,sam9x60-wdt
21          - microchip,sama7g5-wdt
22      - items:
23          - const: microchip,sam9x7-wdt
24          - const: microchip,sam9x60-wdt
25
26  reg:
27    maxItems: 1
28
29  interrupts:
30    maxItems: 1
31
32  atmel,watchdog-type:
33    $ref: /schemas/types.yaml#/definitions/string
34    description: should be hardware or software.
35    oneOf:
36      - description:
37          Enable watchdog fault reset. A watchdog fault triggers
38          watchdog reset.
39        const: hardware
40      - description:
41          Enable watchdog fault interrupt. A watchdog fault asserts
42          watchdog interrupt.
43        const: software
44    default: hardware
45
46  atmel,idle-halt:
47    $ref: /schemas/types.yaml#/definitions/flag
48    description: |
49      present if you want to stop the watchdog when the CPU is in idle state.
50      CAUTION: This property should be used with care, it actually makes the
51      watchdog not counting when the CPU is in idle state, therefore the
52      watchdog reset time depends on mean CPU usage and will not reset at all
53      if the CPU stop working while it is in idle state, which is probably
54      not what you want.
55
56  atmel,dbg-halt:
57    $ref: /schemas/types.yaml#/definitions/flag
58    description: |
59      present if you want to stop the watchdog when the CPU is in debug state.
60
61required:
62  - compatible
63  - reg
64
65unevaluatedProperties: false
66
67examples:
68  - |
69    #include <dt-bindings/interrupt-controller/irq.h>
70
71    watchdog@fc068640 {
72        compatible = "atmel,sama5d4-wdt";
73        reg = <0xfc068640 0x10>;
74        interrupts = <4 IRQ_TYPE_LEVEL_HIGH 5>;
75        timeout-sec = <10>;
76        atmel,watchdog-type = "hardware";
77        atmel,dbg-halt;
78        atmel,idle-halt;
79    };
80
81...
82