1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/timer/arm,twd-timer.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: ARM Timer-Watchdog Timer 8 9maintainers: 10 - Rob Herring <robh@kernel.org> 11 12description: 13 ARM 11MP, Cortex-A5 and Cortex-A9 are often associated with a per-core 14 Timer-Watchdog (aka TWD), which provides both a per-cpu local timer 15 and watchdog. 16 17 The TWD is usually attached to a GIC to deliver its two per-processor 18 interrupts. 19 20properties: 21 compatible: 22 enum: 23 - arm,cortex-a9-twd-timer 24 - arm,cortex-a5-twd-timer 25 - arm,arm11mp-twd-timer 26 27 reg: 28 maxItems: 1 29 30 interrupts: 31 maxItems: 1 32 33 clocks: 34 maxItems: 1 35 36 always-on: 37 description: 38 If present, the timer is powered through an always-on power domain, 39 therefore it never loses context. 40 41required: 42 - compatible 43 - reg 44 - interrupts 45 46additionalProperties: false 47 48examples: 49 - | 50 #include <dt-bindings/interrupt-controller/arm-gic.h> 51 52 timer@2c000600 { 53 compatible = "arm,arm11mp-twd-timer"; 54 reg = <0x2c000600 0x20>; 55 interrupts = <GIC_PPI 13 0xf01>; 56 }; 57