| # SPDX-License-Identifier: GPL-2.0 |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/watchdog/samsung-wdt.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: Samsung SoC Watchdog Timer Controller |
| |
| maintainers: |
| - Krzysztof Kozlowski <krzk@kernel.org> |
| |
| description: |+ |
| The Samsung's Watchdog controller is used for resuming system operation |
| after a preset amount of time during which the WDT reset event has not |
| occurred. |
| |
| properties: |
| compatible: |
| oneOf: |
| - enum: |
| - google,gs101-wdt # for Google gs101 |
| - samsung,s3c2410-wdt # for S3C2410 |
| - samsung,s3c6410-wdt # for S3C6410, S5PV210 and Exynos4 |
| - samsung,exynos5250-wdt # for Exynos5250 |
| - samsung,exynos5420-wdt # for Exynos5420 |
| - samsung,exynos7-wdt # for Exynos7 |
| - samsung,exynos850-wdt # for Exynos850 |
| - samsung,exynosautov9-wdt # for Exynosautov9 |
| - items: |
| - enum: |
| - tesla,fsd-wdt |
| - const: samsung,exynos7-wdt |
| |
| reg: |
| maxItems: 1 |
| |
| clocks: |
| minItems: 1 |
| maxItems: 2 |
| |
| clock-names: |
| minItems: 1 |
| maxItems: 2 |
| |
| interrupts: |
| maxItems: 1 |
| |
| samsung,cluster-index: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| description: |
| Index of CPU cluster on which watchdog is running (in case of Exynos850 |
| or Google gs101). |
| |
| samsung,syscon-phandle: |
| $ref: /schemas/types.yaml#/definitions/phandle |
| description: |
| Phandle to the PMU system controller node (in case of Exynos5250, |
| Exynos5420, Exynos7, Exynos850 and gs101). |
| |
| required: |
| - compatible |
| - clocks |
| - clock-names |
| - interrupts |
| - reg |
| |
| allOf: |
| - $ref: watchdog.yaml# |
| - if: |
| properties: |
| compatible: |
| contains: |
| enum: |
| - google,gs101-wdt |
| - samsung,exynos5250-wdt |
| - samsung,exynos5420-wdt |
| - samsung,exynos7-wdt |
| - samsung,exynos850-wdt |
| - samsung,exynosautov9-wdt |
| then: |
| required: |
| - samsung,syscon-phandle |
| - if: |
| properties: |
| compatible: |
| contains: |
| enum: |
| - google,gs101-wdt |
| - samsung,exynos850-wdt |
| - samsung,exynosautov9-wdt |
| then: |
| properties: |
| clocks: |
| items: |
| - description: Bus clock, used for register interface |
| - description: Source clock (driving watchdog counter) |
| clock-names: |
| items: |
| - const: watchdog |
| - const: watchdog_src |
| samsung,cluster-index: |
| enum: [0, 1] |
| required: |
| - samsung,cluster-index |
| else: |
| properties: |
| clocks: |
| items: |
| - description: Bus clock, which is also a source clock |
| clock-names: |
| items: |
| - const: watchdog |
| samsung,cluster-index: false |
| |
| unevaluatedProperties: false |
| |
| examples: |
| - | |
| watchdog@101d0000 { |
| compatible = "samsung,exynos5250-wdt"; |
| reg = <0x101D0000 0x100>; |
| interrupts = <0 42 0>; |
| clocks = <&clock 336>; |
| clock-names = "watchdog"; |
| samsung,syscon-phandle = <&pmu_syscon>; |
| }; |
