1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/watchdog/sa 4 $id: http://devicetree.org/schemas/watchdog/samsung-wdt.yaml#
5 $schema: http://devicetree.org/meta-schemas/co 5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6 6
7 title: Samsung SoC Watchdog Timer Controller 7 title: Samsung SoC Watchdog Timer Controller
8 8
9 maintainers: 9 maintainers:
10 - Krzysztof Kozlowski <krzk@kernel.org> 10 - Krzysztof Kozlowski <krzk@kernel.org>
11 11
12 description: |+ 12 description: |+
13 The Samsung's Watchdog controller is used fo 13 The Samsung's Watchdog controller is used for resuming system operation
14 after a preset amount of time during which t 14 after a preset amount of time during which the WDT reset event has not
15 occurred. 15 occurred.
16 16
17 properties: 17 properties:
18 compatible: 18 compatible:
19 oneOf: 19 oneOf:
20 - enum: 20 - enum:
21 - google,gs101-wdt 21 - google,gs101-wdt # for Google gs101
22 - samsung,s3c2410-wdt 22 - samsung,s3c2410-wdt # for S3C2410
23 - samsung,s3c6410-wdt 23 - samsung,s3c6410-wdt # for S3C6410, S5PV210 and Exynos4
24 - samsung,exynos5250-wdt 24 - samsung,exynos5250-wdt # for Exynos5250
25 - samsung,exynos5420-wdt 25 - samsung,exynos5420-wdt # for Exynos5420
26 - samsung,exynos7-wdt 26 - samsung,exynos7-wdt # for Exynos7
27 - samsung,exynos850-wdt 27 - samsung,exynos850-wdt # for Exynos850
28 - samsung,exynosautov9-wdt 28 - samsung,exynosautov9-wdt # for Exynosautov9
29 - items: 29 - items:
30 - enum: 30 - enum:
31 - tesla,fsd-wdt 31 - tesla,fsd-wdt
32 - const: samsung,exynos7-wdt 32 - const: samsung,exynos7-wdt
33 33
34 reg: 34 reg:
35 maxItems: 1 35 maxItems: 1
36 36
37 clocks: 37 clocks:
38 minItems: 1 38 minItems: 1
39 maxItems: 2 39 maxItems: 2
40 40
41 clock-names: 41 clock-names:
42 minItems: 1 42 minItems: 1
43 maxItems: 2 43 maxItems: 2
44 44
45 interrupts: 45 interrupts:
46 maxItems: 1 46 maxItems: 1
47 47
48 samsung,cluster-index: 48 samsung,cluster-index:
49 $ref: /schemas/types.yaml#/definitions/uin 49 $ref: /schemas/types.yaml#/definitions/uint32
50 description: 50 description:
51 Index of CPU cluster on which watchdog i 51 Index of CPU cluster on which watchdog is running (in case of Exynos850
52 or Google gs101). 52 or Google gs101).
53 53
54 samsung,syscon-phandle: 54 samsung,syscon-phandle:
55 $ref: /schemas/types.yaml#/definitions/pha 55 $ref: /schemas/types.yaml#/definitions/phandle
56 description: 56 description:
57 Phandle to the PMU system controller nod 57 Phandle to the PMU system controller node (in case of Exynos5250,
58 Exynos5420, Exynos7, Exynos850 and gs101 58 Exynos5420, Exynos7, Exynos850 and gs101).
59 59
60 required: 60 required:
61 - compatible 61 - compatible
62 - clocks 62 - clocks
63 - clock-names 63 - clock-names
64 - interrupts 64 - interrupts
65 - reg 65 - reg
66 66
67 allOf: 67 allOf:
68 - $ref: watchdog.yaml# 68 - $ref: watchdog.yaml#
69 - if: 69 - if:
70 properties: 70 properties:
71 compatible: 71 compatible:
72 contains: 72 contains:
73 enum: 73 enum:
74 - google,gs101-wdt 74 - google,gs101-wdt
75 - samsung,exynos5250-wdt 75 - samsung,exynos5250-wdt
76 - samsung,exynos5420-wdt 76 - samsung,exynos5420-wdt
77 - samsung,exynos7-wdt 77 - samsung,exynos7-wdt
78 - samsung,exynos850-wdt 78 - samsung,exynos850-wdt
79 - samsung,exynosautov9-wdt 79 - samsung,exynosautov9-wdt
80 then: 80 then:
81 required: 81 required:
82 - samsung,syscon-phandle 82 - samsung,syscon-phandle
83 - if: 83 - if:
84 properties: 84 properties:
85 compatible: 85 compatible:
86 contains: 86 contains:
87 enum: 87 enum:
88 - google,gs101-wdt 88 - google,gs101-wdt
89 - samsung,exynos850-wdt 89 - samsung,exynos850-wdt
90 - samsung,exynosautov9-wdt 90 - samsung,exynosautov9-wdt
91 then: 91 then:
92 properties: 92 properties:
93 clocks: 93 clocks:
94 items: 94 items:
95 - description: Bus clock, used for 95 - description: Bus clock, used for register interface
96 - description: Source clock (drivi 96 - description: Source clock (driving watchdog counter)
97 clock-names: 97 clock-names:
98 items: 98 items:
99 - const: watchdog 99 - const: watchdog
100 - const: watchdog_src 100 - const: watchdog_src
101 samsung,cluster-index: 101 samsung,cluster-index:
102 enum: [0, 1] 102 enum: [0, 1]
103 required: 103 required:
104 - samsung,cluster-index 104 - samsung,cluster-index
105 else: 105 else:
106 properties: 106 properties:
107 clocks: 107 clocks:
108 items: 108 items:
109 - description: Bus clock, which is 109 - description: Bus clock, which is also a source clock
110 clock-names: 110 clock-names:
111 items: 111 items:
112 - const: watchdog 112 - const: watchdog
113 samsung,cluster-index: false 113 samsung,cluster-index: false
114 114
115 unevaluatedProperties: false 115 unevaluatedProperties: false
116 116
117 examples: 117 examples:
118 - | 118 - |
119 watchdog@101d0000 { 119 watchdog@101d0000 {
120 compatible = "samsung,exynos5250-wdt"; 120 compatible = "samsung,exynos5250-wdt";
121 reg = <0x101D0000 0x100>; 121 reg = <0x101D0000 0x100>;
122 interrupts = <0 42 0>; 122 interrupts = <0 42 0>;
123 clocks = <&clock 336>; 123 clocks = <&clock 336>;
124 clock-names = "watchdog"; 124 clock-names = "watchdog";
125 samsung,syscon-phandle = <&pmu_syscon> 125 samsung,syscon-phandle = <&pmu_syscon>;
126 }; 126 };
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