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+# 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:
+ enum:
+ - 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
+
+ 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)
+
+ samsung,syscon-phandle:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ Phandle to the PMU system controller node (in case of Exynos5250,
+ Exynos5420, Exynos7 and Exynos850).
+
+required:
+ - compatible
+ - clocks
+ - clock-names
+ - interrupts
+ - reg
+
+allOf:
+ - $ref: watchdog.yaml#
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - 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:
+ - 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>;
+ };