18c2ecf20Sopenharmony_ci# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 28c2ecf20Sopenharmony_ci%YAML 1.2 38c2ecf20Sopenharmony_ci--- 48c2ecf20Sopenharmony_ci$id: http://devicetree.org/schemas/watchdog/ti,rti-wdt.yaml# 58c2ecf20Sopenharmony_ci$schema: http://devicetree.org/meta-schemas/core.yaml# 68c2ecf20Sopenharmony_ci 78c2ecf20Sopenharmony_cititle: Texas Instruments K3 SoC Watchdog Timer 88c2ecf20Sopenharmony_ci 98c2ecf20Sopenharmony_cimaintainers: 108c2ecf20Sopenharmony_ci - Tero Kristo <t-kristo@ti.com> 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_cidescription: 138c2ecf20Sopenharmony_ci The TI K3 SoC watchdog timer is implemented via the RTI (Real Time 148c2ecf20Sopenharmony_ci Interrupt) IP module. This timer adds a support for windowed watchdog 158c2ecf20Sopenharmony_ci mode, which will signal an error if it is pinged outside the watchdog 168c2ecf20Sopenharmony_ci time window, meaning either too early or too late. The error signal 178c2ecf20Sopenharmony_ci generated can be routed to either interrupt a safety controller or 188c2ecf20Sopenharmony_ci to directly reset the SoC. 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ciallOf: 218c2ecf20Sopenharmony_ci - $ref: "watchdog.yaml#" 228c2ecf20Sopenharmony_ci 238c2ecf20Sopenharmony_ciproperties: 248c2ecf20Sopenharmony_ci compatible: 258c2ecf20Sopenharmony_ci enum: 268c2ecf20Sopenharmony_ci - ti,j7-rti-wdt 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_ci reg: 298c2ecf20Sopenharmony_ci maxItems: 1 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ci clocks: 328c2ecf20Sopenharmony_ci maxItems: 1 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ci power-domains: 358c2ecf20Sopenharmony_ci maxItems: 1 368c2ecf20Sopenharmony_ci 378c2ecf20Sopenharmony_ci assigned-clocks: 388c2ecf20Sopenharmony_ci maxItems: 1 398c2ecf20Sopenharmony_ci 408c2ecf20Sopenharmony_ci assigned-clocks-parents: 418c2ecf20Sopenharmony_ci maxItems: 1 428c2ecf20Sopenharmony_ci 438c2ecf20Sopenharmony_cirequired: 448c2ecf20Sopenharmony_ci - compatible 458c2ecf20Sopenharmony_ci - reg 468c2ecf20Sopenharmony_ci - clocks 478c2ecf20Sopenharmony_ci - power-domains 488c2ecf20Sopenharmony_ci 498c2ecf20Sopenharmony_ciunevaluatedProperties: false 508c2ecf20Sopenharmony_ci 518c2ecf20Sopenharmony_ciexamples: 528c2ecf20Sopenharmony_ci - | 538c2ecf20Sopenharmony_ci /* 548c2ecf20Sopenharmony_ci * RTI WDT in main domain on J721e SoC. Assigned clocks are used to 558c2ecf20Sopenharmony_ci * select the source clock for the watchdog, forcing it to tick with 568c2ecf20Sopenharmony_ci * a 32kHz clock in this case. 578c2ecf20Sopenharmony_ci */ 588c2ecf20Sopenharmony_ci #include <dt-bindings/soc/ti,sci_pm_domain.h> 598c2ecf20Sopenharmony_ci 608c2ecf20Sopenharmony_ci watchdog0: rti@2200000 { 618c2ecf20Sopenharmony_ci compatible = "ti,rti-wdt"; 628c2ecf20Sopenharmony_ci reg = <0x2200000 0x100>; 638c2ecf20Sopenharmony_ci clocks = <&k3_clks 252 1>; 648c2ecf20Sopenharmony_ci power-domains = <&k3_pds 252 TI_SCI_PD_EXCLUSIVE>; 658c2ecf20Sopenharmony_ci assigned-clocks = <&k3_clks 252 1>; 668c2ecf20Sopenharmony_ci assigned-clock-parents = <&k3_clks 252 5>; 678c2ecf20Sopenharmony_ci }; 68