xref: /linux/Documentation/devicetree/bindings/timer/arm,twd-timer.yaml (revision 762f99f4f3cb41a775b5157dd761217beba65873) 
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