xref: /linux/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml (revision 4fd18fc38757217c746aa063ba9e4729814dc737) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/watchdog/ti,rti-wdt.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Texas Instruments K3 SoC Watchdog Timer
8
9maintainers:
10  - Tero Kristo <t-kristo@ti.com>
11
12description:
13  The TI K3 SoC watchdog timer is implemented via the RTI (Real Time
14  Interrupt) IP module. This timer adds a support for windowed watchdog
15  mode, which will signal an error if it is pinged outside the watchdog
16  time window, meaning either too early or too late. The error signal
17  generated can be routed to either interrupt a safety controller or
18  to directly reset the SoC.
19
20allOf:
21  - $ref: "watchdog.yaml#"
22
23properties:
24  compatible:
25    enum:
26      - ti,j7-rti-wdt
27
28  reg:
29    maxItems: 1
30
31  clocks:
32    maxItems: 1
33
34  power-domains:
35    maxItems: 1
36
37  assigned-clocks:
38    maxItems: 1
39
40  assigned-clocks-parents:
41    maxItems: 1
42
43required:
44  - compatible
45  - reg
46  - clocks
47  - power-domains
48
49unevaluatedProperties: false
50
51examples:
52  - |
53    /*
54     * RTI WDT in main domain on J721e SoC. Assigned clocks are used to
55     * select the source clock for the watchdog, forcing it to tick with
56     * a 32kHz clock in this case.
57     */
58    #include <dt-bindings/soc/ti,sci_pm_domain.h>
59
60    watchdog0: rti@2200000 {
61        compatible = "ti,rti-wdt";
62        reg = <0x2200000 0x100>;
63        clocks = <&k3_clks 252 1>;
64        power-domains = <&k3_pds 252 TI_SCI_PD_EXCLUSIVE>;
65        assigned-clocks = <&k3_clks 252 1>;
66        assigned-clock-parents = <&k3_clks 252 5>;
67    };
68