1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/watchdog/xlnx,versal-wwdt.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Xilinx Versal window watchdog timer controller
8
9 maintainers:
10 - Neeli Srinivas <srinivas.neeli@amd.com>
11
12 description:
13 Versal watchdog intellectual property uses window watchdog mode.
14 Window watchdog timer(WWDT) contains closed(first) and open(second)
15 window with 32 bit width. Write to the watchdog timer within
16 predefined window periods of time. This means a period that is not
17 too soon and a period that is not too late. The WWDT has to be
18 restarted within the open window time. If software tries to restart
19 WWDT outside of the open window time period, it generates a reset.
20
21 allOf:
22 - $ref: watchdog.yaml#
23
24 properties:
25 compatible:
26 enum:
27 - xlnx,versal-wwdt
28
29 reg:
30 maxItems: 1
31
32 clocks:
33 maxItems: 1
34
35 required:
36 - compatible
37 - reg
38 - clocks
39
40 unevaluatedProperties: false
41
42 examples:
43 - |
44 watchdog@fd4d0000 {
45 compatible = "xlnx,versal-wwdt";
46 reg = <0xfd4d0000 0x10000>;
47 clocks = <&clock25>;
48 timeout-sec = <30>;
49 };
50 ...
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