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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>;
};
|
