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