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