113b19169SEugen Hristev# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 213b19169SEugen Hristev%YAML 1.2 313b19169SEugen Hristev--- 413b19169SEugen Hristev$id: http://devicetree.org/schemas/watchdog/atmel,sama5d4-wdt.yaml# 513b19169SEugen Hristev$schema: http://devicetree.org/meta-schemas/core.yaml# 613b19169SEugen Hristev 713b19169SEugen Hristevtitle: Atmel SAMA5D4 Watchdog Timer (WDT) Controller 813b19169SEugen Hristev 913b19169SEugen Hristevmaintainers: 1013b19169SEugen Hristev - Eugen Hristev <eugen.hristev@microchip.com> 1113b19169SEugen Hristev 1213b19169SEugen HristevallOf: 13*81c00b58SRob Herring - $ref: watchdog.yaml# 1413b19169SEugen Hristev 1513b19169SEugen Hristevproperties: 1613b19169SEugen Hristev compatible: 1713b19169SEugen Hristev enum: 1813b19169SEugen Hristev - atmel,sama5d4-wdt 1913b19169SEugen Hristev - microchip,sam9x60-wdt 2012dbbf08SEugen Hristev - microchip,sama7g5-wdt 2113b19169SEugen Hristev 2213b19169SEugen Hristev reg: 2313b19169SEugen Hristev maxItems: 1 2413b19169SEugen Hristev 259696fe26SRob Herring interrupts: 269696fe26SRob Herring maxItems: 1 279696fe26SRob Herring 2813b19169SEugen Hristev atmel,watchdog-type: 2913b19169SEugen Hristev $ref: /schemas/types.yaml#/definitions/string 3013b19169SEugen Hristev description: should be hardware or software. 3113b19169SEugen Hristev oneOf: 3213b19169SEugen Hristev - description: 3313b19169SEugen Hristev Enable watchdog fault reset. A watchdog fault triggers 3413b19169SEugen Hristev watchdog reset. 3513b19169SEugen Hristev const: hardware 3613b19169SEugen Hristev - description: 3713b19169SEugen Hristev Enable watchdog fault interrupt. A watchdog fault asserts 3813b19169SEugen Hristev watchdog interrupt. 3913b19169SEugen Hristev const: software 4013b19169SEugen Hristev default: hardware 4113b19169SEugen Hristev 4213b19169SEugen Hristev atmel,idle-halt: 4313b19169SEugen Hristev $ref: /schemas/types.yaml#/definitions/flag 4413b19169SEugen Hristev description: | 4513b19169SEugen Hristev present if you want to stop the watchdog when the CPU is in idle state. 4613b19169SEugen Hristev CAUTION: This property should be used with care, it actually makes the 4713b19169SEugen Hristev watchdog not counting when the CPU is in idle state, therefore the 4813b19169SEugen Hristev watchdog reset time depends on mean CPU usage and will not reset at all 4913b19169SEugen Hristev if the CPU stop working while it is in idle state, which is probably 5013b19169SEugen Hristev not what you want. 5113b19169SEugen Hristev 5213b19169SEugen Hristev atmel,dbg-halt: 5313b19169SEugen Hristev $ref: /schemas/types.yaml#/definitions/flag 5413b19169SEugen Hristev description: | 5513b19169SEugen Hristev present if you want to stop the watchdog when the CPU is in debug state. 5613b19169SEugen Hristev 5713b19169SEugen Hristevrequired: 5813b19169SEugen Hristev - compatible 5913b19169SEugen Hristev - reg 6013b19169SEugen Hristev 6113b19169SEugen HristevunevaluatedProperties: false 6213b19169SEugen Hristev 6313b19169SEugen Hristevexamples: 6413b19169SEugen Hristev - | 6513b19169SEugen Hristev #include <dt-bindings/interrupt-controller/irq.h> 6613b19169SEugen Hristev 6713b19169SEugen Hristev watchdog@fc068640 { 6813b19169SEugen Hristev compatible = "atmel,sama5d4-wdt"; 6913b19169SEugen Hristev reg = <0xfc068640 0x10>; 7013b19169SEugen Hristev interrupts = <4 IRQ_TYPE_LEVEL_HIGH 5>; 7113b19169SEugen Hristev timeout-sec = <10>; 7213b19169SEugen Hristev atmel,watchdog-type = "hardware"; 7313b19169SEugen Hristev atmel,dbg-halt; 7413b19169SEugen Hristev atmel,idle-halt; 7513b19169SEugen Hristev }; 7613b19169SEugen Hristev 7713b19169SEugen Hristev... 78