| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/watchdog/samsung-wdt.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Samsung SoC Watchdog Timer Controller |
| 8 | |
| 9 | maintainers: |
| 10 | - Krzysztof Kozlowski <krzk@kernel.org> |
| 11 | |
| 12 | description: |+ |
| 13 | The Samsung's Watchdog controller is used for resuming system operation |
| 14 | after a preset amount of time during which the WDT reset event has not |
| 15 | occurred. |
| 16 | |
| 17 | properties: |
| 18 | compatible: |
| 19 | enum: |
| 20 | - samsung,s3c2410-wdt # for S3C2410 |
| 21 | - samsung,s3c6410-wdt # for S3C6410, S5PV210 and Exynos4 |
| 22 | - samsung,exynos5250-wdt # for Exynos5250 |
| 23 | - samsung,exynos5420-wdt # for Exynos5420 |
| 24 | - samsung,exynos7-wdt # for Exynos7 |
| 25 | - samsung,exynos850-wdt # for Exynos850 |
| 26 | - samsung,exynosautov9-wdt # for Exynosautov9 |
| 27 | |
| 28 | reg: |
| 29 | maxItems: 1 |
| 30 | |
| 31 | clocks: |
| 32 | minItems: 1 |
| 33 | maxItems: 2 |
| 34 | |
| 35 | clock-names: |
| 36 | minItems: 1 |
| 37 | maxItems: 2 |
| 38 | |
| 39 | interrupts: |
| 40 | maxItems: 1 |
| 41 | |
| 42 | samsung,cluster-index: |
| 43 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 44 | description: |
| 45 | Index of CPU cluster on which watchdog is running (in case of Exynos850) |
| 46 | |
| 47 | samsung,syscon-phandle: |
| 48 | $ref: /schemas/types.yaml#/definitions/phandle |
| 49 | description: |
| 50 | Phandle to the PMU system controller node (in case of Exynos5250, |
| 51 | Exynos5420, Exynos7 and Exynos850). |
| 52 | |
| 53 | required: |
| 54 | - compatible |
| 55 | - clocks |
| 56 | - clock-names |
| 57 | - interrupts |
| 58 | - reg |
| 59 | |
| 60 | allOf: |
| 61 | - $ref: watchdog.yaml# |
| 62 | - if: |
| 63 | properties: |
| 64 | compatible: |
| 65 | contains: |
| 66 | enum: |
| 67 | - samsung,exynos5250-wdt |
| 68 | - samsung,exynos5420-wdt |
| 69 | - samsung,exynos7-wdt |
| 70 | - samsung,exynos850-wdt |
| 71 | - samsung,exynosautov9-wdt |
| 72 | then: |
| 73 | required: |
| 74 | - samsung,syscon-phandle |
| 75 | - if: |
| 76 | properties: |
| 77 | compatible: |
| 78 | contains: |
| 79 | enum: |
| 80 | - samsung,exynos850-wdt |
| 81 | - samsung,exynosautov9-wdt |
| 82 | then: |
| 83 | properties: |
| 84 | clocks: |
| 85 | items: |
| 86 | - description: Bus clock, used for register interface |
| 87 | - description: Source clock (driving watchdog counter) |
| 88 | clock-names: |
| 89 | items: |
| 90 | - const: watchdog |
| 91 | - const: watchdog_src |
| 92 | samsung,cluster-index: |
| 93 | enum: [0, 1] |
| 94 | required: |
| 95 | - samsung,cluster-index |
| 96 | else: |
| 97 | properties: |
| 98 | clocks: |
| 99 | items: |
| 100 | - description: Bus clock, which is also a source clock |
| 101 | clock-names: |
| 102 | items: |
| 103 | - const: watchdog |
| 104 | samsung,cluster-index: false |
| 105 | |
| 106 | unevaluatedProperties: false |
| 107 | |
| 108 | examples: |
| 109 | - | |
| 110 | watchdog@101d0000 { |
| 111 | compatible = "samsung,exynos5250-wdt"; |
| 112 | reg = <0x101D0000 0x100>; |
| 113 | interrupts = <0 42 0>; |
| 114 | clocks = <&clock 336>; |
| 115 | clock-names = "watchdog"; |
| 116 | samsung,syscon-phandle = <&pmu_syscon>; |
| 117 | }; |