1 # SPDX-License-Identifier: (GPL-2.0-only OR BS 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/watchdog/at 4 $id: http://devicetree.org/schemas/watchdog/atmel,sama5d4-wdt.yaml#
5 $schema: http://devicetree.org/meta-schemas/co 5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6 6
7 title: Atmel SAMA5D4 Watchdog Timer (WDT) Cont 7 title: Atmel SAMA5D4 Watchdog Timer (WDT) Controller
8 8
9 maintainers: 9 maintainers:
10 - Eugen Hristev <eugen.hristev@microchip.com> 10 - Eugen Hristev <eugen.hristev@microchip.com>
11 11
12 allOf: 12 allOf:
13 - $ref: watchdog.yaml# 13 - $ref: watchdog.yaml#
14 14
15 properties: 15 properties:
16 compatible: 16 compatible:
17 oneOf: 17 oneOf:
18 - enum: 18 - enum:
19 - atmel,sama5d4-wdt 19 - atmel,sama5d4-wdt
20 - microchip,sam9x60-wdt 20 - microchip,sam9x60-wdt
21 - microchip,sama7g5-wdt 21 - microchip,sama7g5-wdt
22 - items: 22 - items:
23 - const: microchip,sam9x7-wdt 23 - const: microchip,sam9x7-wdt
24 - const: microchip,sam9x60-wdt 24 - const: microchip,sam9x60-wdt
25 25
26 reg: 26 reg:
27 maxItems: 1 27 maxItems: 1
28 28
29 interrupts: 29 interrupts:
30 maxItems: 1 30 maxItems: 1
31 31
32 atmel,watchdog-type: 32 atmel,watchdog-type:
33 $ref: /schemas/types.yaml#/definitions/str 33 $ref: /schemas/types.yaml#/definitions/string
34 description: should be hardware or softwar 34 description: should be hardware or software.
35 oneOf: 35 oneOf:
36 - description: 36 - description:
37 Enable watchdog fault reset. A watch 37 Enable watchdog fault reset. A watchdog fault triggers
38 watchdog reset. 38 watchdog reset.
39 const: hardware 39 const: hardware
40 - description: 40 - description:
41 Enable watchdog fault interrupt. A w 41 Enable watchdog fault interrupt. A watchdog fault asserts
42 watchdog interrupt. 42 watchdog interrupt.
43 const: software 43 const: software
44 default: hardware 44 default: hardware
45 45
46 atmel,idle-halt: 46 atmel,idle-halt:
47 $ref: /schemas/types.yaml#/definitions/fla 47 $ref: /schemas/types.yaml#/definitions/flag
48 description: | 48 description: |
49 present if you want to stop the watchdog 49 present if you want to stop the watchdog when the CPU is in idle state.
50 CAUTION: This property should be used wi 50 CAUTION: This property should be used with care, it actually makes the
51 watchdog not counting when the CPU is in 51 watchdog not counting when the CPU is in idle state, therefore the
52 watchdog reset time depends on mean CPU 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 i 53 if the CPU stop working while it is in idle state, which is probably
54 not what you want. 54 not what you want.
55 55
56 atmel,dbg-halt: 56 atmel,dbg-halt:
57 $ref: /schemas/types.yaml#/definitions/fla 57 $ref: /schemas/types.yaml#/definitions/flag
58 description: | 58 description: |
59 present if you want to stop the watchdog 59 present if you want to stop the watchdog when the CPU is in debug state.
60 60
61 required: 61 required:
62 - compatible 62 - compatible
63 - reg 63 - reg
64 64
65 unevaluatedProperties: false 65 unevaluatedProperties: false
66 66
67 examples: 67 examples:
68 - | 68 - |
69 #include <dt-bindings/interrupt-controller 69 #include <dt-bindings/interrupt-controller/irq.h>
70 70
71 watchdog@fc068640 { 71 watchdog@fc068640 {
72 compatible = "atmel,sama5d4-wdt"; 72 compatible = "atmel,sama5d4-wdt";
73 reg = <0xfc068640 0x10>; 73 reg = <0xfc068640 0x10>;
74 interrupts = <4 IRQ_TYPE_LEVEL_HIGH 5> 74 interrupts = <4 IRQ_TYPE_LEVEL_HIGH 5>;
75 timeout-sec = <10>; 75 timeout-sec = <10>;
76 atmel,watchdog-type = "hardware"; 76 atmel,watchdog-type = "hardware";
77 atmel,dbg-halt; 77 atmel,dbg-halt;
78 atmel,idle-halt; 78 atmel,idle-halt;
79 }; 79 };
80 80
81 ... 81 ...
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.