xref: /linux/Documentation/devicetree/bindings/timer/nvidia,tegra186-timer.yaml (revision 1043897681808118c0f7e70b210774000fe06621) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: "http://devicetree.org/schemas/timer/nvidia,tegra186-timer.yaml#"
5$schema: "http://devicetree.org/meta-schemas/core.yaml#"
6
7title: NVIDIA Tegra186 timer
8
9maintainers:
10  - Thierry Reding <treding@nvidia.com>
11
12description: >
13  The Tegra timer provides 29-bit timer counters and a 32-bit timestamp
14  counter. Each NV timer selects its timing reference signal from the 1 MHz
15  reference generated by USEC, TSC or either clk_m or OSC. Each TMR can be
16  programmed to generate one-shot, periodic, or watchdog interrupts.
17
18
19properties:
20  compatible:
21    oneOf:
22      - const: nvidia,tegra186-timer
23        description: >
24          The Tegra186 timer provides ten 29-bit timer counters.
25      - const: nvidia,tegra234-timer
26        description: >
27          The Tegra234 timer provides sixteen 29-bit timer counters.
28
29  reg:
30    maxItems: 1
31
32  interrupts: true
33
34allOf:
35  - if:
36      properties:
37        compatible:
38          contains:
39            const: nvidia,tegra186-timer
40    then:
41      properties:
42        interrupts:
43          maxItems: 10
44          description: >
45            One per each timer channels 0 through 9.
46
47  - if:
48      properties:
49        compatible:
50          contains:
51            const: nvidia,tegra234-timer
52    then:
53      properties:
54        interrupts:
55          maxItems: 16
56          description: >
57            One per each timer channels 0 through 15.
58
59required:
60  - compatible
61  - reg
62  - interrupts
63
64additionalProperties: false
65
66examples:
67  - |
68    #include <dt-bindings/interrupt-controller/arm-gic.h>
69    #include <dt-bindings/interrupt-controller/irq.h>
70
71    timer@3010000 {
72        compatible = "nvidia,tegra186-timer";
73        reg = <0x03010000 0x000e0000>;
74        interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
75                     <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
76                     <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>,
77                     <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
78                     <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
79                     <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>,
80                     <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
81                     <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
82                     <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
83                     <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
84    };
85
86  - |
87    #include <dt-bindings/interrupt-controller/arm-gic.h>
88    #include <dt-bindings/interrupt-controller/irq.h>
89
90    timer@2080000 {
91        compatible = "nvidia,tegra234-timer";
92        reg = <0x02080000 0x00121000>;
93        interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
94                     <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
95                     <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>,
96                     <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
97                     <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
98                     <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>,
99                     <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
100                     <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
101                     <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
102                     <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>,
103                     <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>,
104                     <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
105                     <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
106                     <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>,
107                     <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>,
108                     <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>;
109    };
110