xref: /linux/Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml (revision be239684b18e1cdcafcf8c7face4a2f562c745ad) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/watchdog/qcom-wdt.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Qualcomm Krait Processor Sub-system (KPSS) Watchdog timer
8
9maintainers:
10  - Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
11
12properties:
13  $nodename:
14    pattern: "^(watchdog|timer)@[0-9a-f]+$"
15
16  compatible:
17    oneOf:
18      - items:
19          - enum:
20              - qcom,kpss-wdt-ipq4019
21              - qcom,apss-wdt-ipq5018
22              - qcom,apss-wdt-ipq5332
23              - qcom,apss-wdt-ipq9574
24              - qcom,apss-wdt-msm8226
25              - qcom,apss-wdt-msm8974
26              - qcom,apss-wdt-msm8994
27              - qcom,apss-wdt-qcm2290
28              - qcom,apss-wdt-qcs404
29              - qcom,apss-wdt-sa8775p
30              - qcom,apss-wdt-sc7180
31              - qcom,apss-wdt-sc7280
32              - qcom,apss-wdt-sc8180x
33              - qcom,apss-wdt-sc8280xp
34              - qcom,apss-wdt-sdm845
35              - qcom,apss-wdt-sdx55
36              - qcom,apss-wdt-sdx65
37              - qcom,apss-wdt-sm6115
38              - qcom,apss-wdt-sm6350
39              - qcom,apss-wdt-sm8150
40              - qcom,apss-wdt-sm8250
41          - const: qcom,kpss-wdt
42      - const: qcom,kpss-wdt
43        deprecated: true
44      - items:
45          - const: qcom,scss-timer
46          - const: qcom,msm-timer
47      - items:
48          - enum:
49              - qcom,kpss-wdt-apq8064
50              - qcom,kpss-wdt-ipq8064
51              - qcom,kpss-wdt-mdm9615
52              - qcom,kpss-wdt-msm8960
53          - const: qcom,kpss-timer
54          - const: qcom,msm-timer
55
56  reg:
57    maxItems: 1
58
59  clocks:
60    maxItems: 1
61
62  clock-names:
63    items:
64      - const: sleep
65
66  clock-frequency:
67    description:
68      The frequency of the general purpose timer in Hz.
69
70  cpu-offset:
71    $ref: /schemas/types.yaml#/definitions/uint32
72    description:
73      Per-CPU offset used when the timer is accessed without the CPU remapping
74      facilities. The offset is cpu-offset + (0x10000 * cpu-nr).
75
76  interrupts:
77    minItems: 1
78    maxItems: 5
79
80required:
81  - compatible
82  - reg
83  - clocks
84
85allOf:
86  - $ref: watchdog.yaml#
87
88  - if:
89      properties:
90        compatible:
91          contains:
92            const: qcom,kpss-wdt
93    then:
94      properties:
95        clock-frequency: false
96        cpu-offset: false
97        interrupts:
98          minItems: 1
99          items:
100            - description: Bark
101            - description: Bite
102
103    else:
104      properties:
105        interrupts:
106          minItems: 3
107          items:
108            - description: Debug
109            - description: First general purpose timer
110            - description: Second general purpose timer
111            - description: First watchdog
112            - description: Second watchdog
113      required:
114        - clock-frequency
115
116unevaluatedProperties: false
117
118examples:
119  - |
120    #include <dt-bindings/interrupt-controller/arm-gic.h>
121
122    watchdog@17c10000 {
123        compatible = "qcom,apss-wdt-sm8150", "qcom,kpss-wdt";
124        reg = <0x17c10000 0x1000>;
125        clocks = <&sleep_clk>;
126        interrupts = <GIC_SPI 0 IRQ_TYPE_EDGE_RISING>;
127        timeout-sec = <10>;
128    };
129
130  - |
131    #include <dt-bindings/interrupt-controller/arm-gic.h>
132
133    watchdog@200a000 {
134        compatible = "qcom,kpss-wdt-ipq8064", "qcom,kpss-timer", "qcom,msm-timer";
135        interrupts = <GIC_PPI 1 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_EDGE_RISING)>,
136                     <GIC_PPI 2 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_EDGE_RISING)>,
137                     <GIC_PPI 3 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_EDGE_RISING)>,
138                     <GIC_PPI 4 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_EDGE_RISING)>,
139                     <GIC_PPI 5 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_EDGE_RISING)>;
140        reg = <0x0200a000 0x100>;
141        clock-frequency = <25000000>;
142        clocks = <&sleep_clk>;
143        clock-names = "sleep";
144        cpu-offset = <0x80000>;
145    };
146