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 enum:
20 - enum: !! 20 - samsung,s3c2410-wdt # for S3C2410
21 - google,gs101-wdt !! 21 - samsung,s3c6410-wdt # for S3C6410, S5PV210 and Exynos4
22 - samsung,s3c2410-wdt !! 22 - samsung,exynos5250-wdt # for Exynos5250
23 - samsung,s3c6410-wdt !! 23 - samsung,exynos5420-wdt # for Exynos5420
24 - samsung,exynos5250-wdt !! 24 - samsung,exynos7-wdt # for Exynos7
25 - samsung,exynos5420-wdt !! 25 - samsung,exynos850-wdt # for Exynos850
26 - samsung,exynos7-wdt !! 26 - samsung,exynosautov9-wdt # for Exynosautov9
27 - samsung,exynos850-wdt <<
28 - samsung,exynosautov9-wdt <<
29 - items: <<
30 - enum: <<
31 - tesla,fsd-wdt <<
32 - const: samsung,exynos7-wdt <<
33 27
34 reg: 28 reg:
35 maxItems: 1 29 maxItems: 1
36 30
37 clocks: 31 clocks:
38 minItems: 1 32 minItems: 1
39 maxItems: 2 33 maxItems: 2
40 34
41 clock-names: 35 clock-names:
42 minItems: 1 36 minItems: 1
43 maxItems: 2 37 maxItems: 2
44 38
45 interrupts: 39 interrupts:
46 maxItems: 1 40 maxItems: 1
47 41
48 samsung,cluster-index: 42 samsung,cluster-index:
49 $ref: /schemas/types.yaml#/definitions/uin 43 $ref: /schemas/types.yaml#/definitions/uint32
50 description: 44 description:
51 Index of CPU cluster on which watchdog i !! 45 Index of CPU cluster on which watchdog is running (in case of Exynos850)
52 or Google gs101). <<
53 46
54 samsung,syscon-phandle: 47 samsung,syscon-phandle:
55 $ref: /schemas/types.yaml#/definitions/pha 48 $ref: /schemas/types.yaml#/definitions/phandle
56 description: 49 description:
57 Phandle to the PMU system controller nod 50 Phandle to the PMU system controller node (in case of Exynos5250,
58 Exynos5420, Exynos7, Exynos850 and gs101 !! 51 Exynos5420, Exynos7 and Exynos850).
59 52
60 required: 53 required:
61 - compatible 54 - compatible
62 - clocks 55 - clocks
63 - clock-names 56 - clock-names
64 - interrupts 57 - interrupts
65 - reg 58 - reg
66 59
67 allOf: 60 allOf:
68 - $ref: watchdog.yaml# 61 - $ref: watchdog.yaml#
69 - if: 62 - if:
70 properties: 63 properties:
71 compatible: 64 compatible:
72 contains: 65 contains:
73 enum: 66 enum:
74 - google,gs101-wdt <<
75 - samsung,exynos5250-wdt 67 - samsung,exynos5250-wdt
76 - samsung,exynos5420-wdt 68 - samsung,exynos5420-wdt
77 - samsung,exynos7-wdt 69 - samsung,exynos7-wdt
78 - samsung,exynos850-wdt 70 - samsung,exynos850-wdt
79 - samsung,exynosautov9-wdt 71 - samsung,exynosautov9-wdt
80 then: 72 then:
81 required: 73 required:
82 - samsung,syscon-phandle 74 - samsung,syscon-phandle
83 - if: 75 - if:
84 properties: 76 properties:
85 compatible: 77 compatible:
86 contains: 78 contains:
87 enum: 79 enum:
88 - google,gs101-wdt <<
89 - samsung,exynos850-wdt 80 - samsung,exynos850-wdt
90 - samsung,exynosautov9-wdt 81 - samsung,exynosautov9-wdt
91 then: 82 then:
92 properties: 83 properties:
93 clocks: 84 clocks:
94 items: 85 items:
95 - description: Bus clock, used for 86 - description: Bus clock, used for register interface
96 - description: Source clock (drivi 87 - description: Source clock (driving watchdog counter)
97 clock-names: 88 clock-names:
98 items: 89 items:
99 - const: watchdog 90 - const: watchdog
100 - const: watchdog_src 91 - const: watchdog_src
101 samsung,cluster-index: 92 samsung,cluster-index:
102 enum: [0, 1] 93 enum: [0, 1]
103 required: 94 required:
104 - samsung,cluster-index 95 - samsung,cluster-index
105 else: 96 else:
106 properties: 97 properties:
107 clocks: 98 clocks:
108 items: 99 items:
109 - description: Bus clock, which is 100 - description: Bus clock, which is also a source clock
110 clock-names: 101 clock-names:
111 items: 102 items:
112 - const: watchdog 103 - const: watchdog
113 samsung,cluster-index: false 104 samsung,cluster-index: false
114 105
115 unevaluatedProperties: false 106 unevaluatedProperties: false
116 107
117 examples: 108 examples:
118 - | 109 - |
119 watchdog@101d0000 { 110 watchdog@101d0000 {
120 compatible = "samsung,exynos5250-wdt"; 111 compatible = "samsung,exynos5250-wdt";
121 reg = <0x101D0000 0x100>; 112 reg = <0x101D0000 0x100>;
122 interrupts = <0 42 0>; 113 interrupts = <0 42 0>;
123 clocks = <&clock 336>; 114 clocks = <&clock 336>;
124 clock-names = "watchdog"; 115 clock-names = "watchdog";
125 samsung,syscon-phandle = <&pmu_syscon> 116 samsung,syscon-phandle = <&pmu_syscon>;
126 }; 117 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.