1*6592d293SSrinivas Neeli# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2*6592d293SSrinivas Neeli%YAML 1.2 3*6592d293SSrinivas Neeli--- 4*6592d293SSrinivas Neeli$id: http://devicetree.org/schemas/watchdog/cdns,wdt-r1p2.yaml# 5*6592d293SSrinivas Neeli$schema: http://devicetree.org/meta-schemas/core.yaml# 6*6592d293SSrinivas Neeli 7*6592d293SSrinivas Neelititle: Cadence watchdog timer controller 8*6592d293SSrinivas Neeli 9*6592d293SSrinivas Neelimaintainers: 10*6592d293SSrinivas Neeli - Neeli Srinivas <srinivas.neeli@amd.com> 11*6592d293SSrinivas Neeli 12*6592d293SSrinivas Neelidescription: 13*6592d293SSrinivas Neeli The cadence watchdog timer is used to detect and recover from 14*6592d293SSrinivas Neeli system malfunctions. This watchdog contains 24 bit counter and 15*6592d293SSrinivas Neeli a programmable reset period. The timeout period varies from 1 ms 16*6592d293SSrinivas Neeli to 30 seconds while using a 100Mhz clock. 17*6592d293SSrinivas Neeli 18*6592d293SSrinivas NeeliallOf: 19*6592d293SSrinivas Neeli - $ref: watchdog.yaml# 20*6592d293SSrinivas Neeli 21*6592d293SSrinivas Neeliproperties: 22*6592d293SSrinivas Neeli compatible: 23*6592d293SSrinivas Neeli enum: 24*6592d293SSrinivas Neeli - cdns,wdt-r1p2 25*6592d293SSrinivas Neeli 26*6592d293SSrinivas Neeli reg: 27*6592d293SSrinivas Neeli maxItems: 1 28*6592d293SSrinivas Neeli 29*6592d293SSrinivas Neeli clocks: 30*6592d293SSrinivas Neeli maxItems: 1 31*6592d293SSrinivas Neeli 32*6592d293SSrinivas Neeli interrupts: 33*6592d293SSrinivas Neeli maxItems: 1 34*6592d293SSrinivas Neeli 35*6592d293SSrinivas Neeli reset-on-timeout: 36*6592d293SSrinivas Neeli type: boolean 37*6592d293SSrinivas Neeli description: | 38*6592d293SSrinivas Neeli If this property exists, then a reset is done when watchdog 39*6592d293SSrinivas Neeli times out. 40*6592d293SSrinivas Neeli 41*6592d293SSrinivas Neelirequired: 42*6592d293SSrinivas Neeli - compatible 43*6592d293SSrinivas Neeli - reg 44*6592d293SSrinivas Neeli - clocks 45*6592d293SSrinivas Neeli - interrupts 46*6592d293SSrinivas Neeli 47*6592d293SSrinivas NeeliunevaluatedProperties: false 48*6592d293SSrinivas Neeli 49*6592d293SSrinivas Neeliexamples: 50*6592d293SSrinivas Neeli - | 51*6592d293SSrinivas Neeli #include <dt-bindings/interrupt-controller/arm-gic.h> 52*6592d293SSrinivas Neeli 53*6592d293SSrinivas Neeli watchdog@f8005000 { 54*6592d293SSrinivas Neeli compatible = "cdns,wdt-r1p2"; 55*6592d293SSrinivas Neeli reg = <0xf8005000 0x1000>; 56*6592d293SSrinivas Neeli clocks = <&clkc 45>; 57*6592d293SSrinivas Neeli interrupt-parent = <&intc>; 58*6592d293SSrinivas Neeli interrupts = <GIC_SPI 9 IRQ_TYPE_EDGE_RISING>; 59*6592d293SSrinivas Neeli reset-on-timeout; 60*6592d293SSrinivas Neeli timeout-sec = <10>; 61*6592d293SSrinivas Neeli }; 62*6592d293SSrinivas Neeli... 63