xref: /linux/Documentation/devicetree/bindings/watchdog/arm,sp805.yaml (revision 031616c434db05ce766f76c62865f55698e0924f) 
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    minItems: 2
47    maxItems: 2
48
49  clock-names:
50    items:
51      - const: wdog_clk
52      - const: apb_pclk
53
54required:
55  - compatible
56  - reg
57  - clocks
58  - clock-names
59
60unevaluatedProperties: false
61
62examples:
63  - |
64    #include <dt-bindings/interrupt-controller/arm-gic.h>
65    watchdog@66090000 {
66        compatible = "arm,sp805", "arm,primecell";
67        reg = <0x66090000 0x1000>;
68        interrupts = <GIC_SPI 406 IRQ_TYPE_LEVEL_HIGH>;
69        clocks = <&wdt_clk>, <&apb_pclk>;
70        clock-names = "wdog_clk", "apb_pclk";
71    };
72