xref: /linux/Documentation/devicetree/bindings/watchdog/arm,sp805.yaml (revision 78b421b6a7c6dbb6a213877c742af52330f5026d) 
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/watchdog/arm,sp805.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: ARM AMBA Primecell SP805 Watchdog
8
9maintainers:
10  - Viresh Kumar <vireshk@kernel.org>
11
12description: |+
13  The Arm SP805 IP implements a watchdog device, which triggers an interrupt
14  after a configurable time period. If that interrupt has not been serviced
15  when the next interrupt would be triggered, the reset signal is asserted.
16
17allOf:
18  - $ref: /schemas/watchdog/watchdog.yaml#
19
20# Need a custom select here or 'arm,primecell' will match on lots of nodes
21select:
22  properties:
23    compatible:
24      contains:
25        const: arm,sp805
26  required:
27    - compatible
28
29properties:
30  compatible:
31    items:
32      - const: arm,sp805
33      - const: arm,primecell
34
35  interrupts:
36    maxItems: 1
37
38  reg:
39    maxItems: 1
40
41  clocks:
42    description: |
43      Clocks driving the watchdog timer hardware. The first clock is used
44      for the actual watchdog counter. The second clock drives the register
45      interface.
46    maxItems: 2
47
48  clock-names:
49    items:
50      - const: wdog_clk
51      - const: apb_pclk
52
53required:
54  - compatible
55  - reg
56  - clocks
57  - clock-names
58
59unevaluatedProperties: false
60
61examples:
62  - |
63    #include <dt-bindings/interrupt-controller/arm-gic.h>
64    watchdog@66090000 {
65        compatible = "arm,sp805", "arm,primecell";
66        reg = <0x66090000 0x1000>;
67        interrupts = <GIC_SPI 406 IRQ_TYPE_LEVEL_HIGH>;
68        clocks = <&wdt_clk>, <&apb_pclk>;
69        clock-names = "wdog_clk", "apb_pclk";
70    };
71