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Binding defined two if:then: blocks covering different conditions but not fully constraining the properties per each variant: 1. "if:" to require samsung,syscon-phandle, 2. "if:" with "else:" to narrow number of clocks and require or disallow samsung,cluster-index. This still did not cover following cases: 1. Disallow samsung,syscon-phandle when not applicable, 2. Narrow samsung,cluster-index to [0, 1], for SoCs with only two clusters. Solving this in current format would lead to spaghetti code, so re-write entire "if:then:" approach into mutually exclusive cases so each SoC appears only in one "if:" block. This allows to forbid samsung,syscon-phandle for S3C6410, and narrow samsung,cluster-index to [0, 1]. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com> Acked-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Rob Herring (Arm) <robh@kernel.org> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
165 lines
4.2 KiB
YAML
165 lines
4.2 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/watchdog/samsung-wdt.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Samsung SoC Watchdog Timer Controller
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maintainers:
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- Krzysztof Kozlowski <krzk@kernel.org>
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description: |+
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The Samsung's Watchdog controller is used for resuming system operation
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after a preset amount of time during which the WDT reset event has not
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occurred.
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properties:
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compatible:
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oneOf:
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- enum:
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- google,gs101-wdt # for Google gs101
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- samsung,s3c6410-wdt # for S3C6410, S5PV210 and Exynos4
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- samsung,exynos5250-wdt # for Exynos5250
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- samsung,exynos5420-wdt # for Exynos5420
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- samsung,exynos7-wdt # for Exynos7
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- samsung,exynos850-wdt # for Exynos850
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- samsung,exynos990-wdt # for Exynos990
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- samsung,exynosautov9-wdt # for Exynosautov9
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- samsung,exynosautov920-wdt # for Exynosautov920
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- items:
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- enum:
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- tesla,fsd-wdt
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- const: samsung,exynos7-wdt
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reg:
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maxItems: 1
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clocks:
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minItems: 1
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maxItems: 2
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clock-names:
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minItems: 1
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maxItems: 2
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interrupts:
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maxItems: 1
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samsung,cluster-index:
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [0, 1, 2]
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description:
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Index of CPU cluster on which watchdog is running (in case of Exynos850,
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Exynos990 or Google gs101).
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samsung,syscon-phandle:
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$ref: /schemas/types.yaml#/definitions/phandle
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description:
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Phandle to the PMU system controller node (in case of Exynos5250,
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Exynos5420, Exynos7, Exynos850, Exynos990 and gs101).
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required:
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- compatible
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- clocks
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- clock-names
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- interrupts
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- reg
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allOf:
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- $ref: watchdog.yaml#
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- if:
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properties:
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compatible:
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contains:
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enum:
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- google,gs101-wdt
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- samsung,exynos850-wdt
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- samsung,exynosautov9-wdt
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- samsung,exynosautov920-wdt
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then:
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properties:
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clocks:
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items:
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- description: Bus clock, used for register interface
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- description: Source clock (driving watchdog counter)
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clock-names:
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items:
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- const: watchdog
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- const: watchdog_src
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samsung,cluster-index:
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enum: [0, 1]
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required:
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- samsung,cluster-index
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- samsung,syscon-phandle
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- if:
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properties:
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compatible:
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contains:
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enum:
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- samsung,exynos990-wdt
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then:
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properties:
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clocks:
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items:
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- description: Bus clock, used for register interface
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- description: Source clock (driving watchdog counter)
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clock-names:
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items:
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- const: watchdog
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- const: watchdog_src
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required:
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- samsung,cluster-index
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- samsung,syscon-phandle
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- if:
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properties:
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compatible:
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contains:
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enum:
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- samsung,exynos5250-wdt
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- samsung,exynos5420-wdt
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- samsung,exynos7-wdt
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then:
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properties:
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clocks:
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items:
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- description: Bus clock, which is also a source clock
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clock-names:
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items:
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- const: watchdog
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samsung,cluster-index: false
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required:
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- samsung,syscon-phandle
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- if:
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properties:
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compatible:
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contains:
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enum:
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- samsung,s3c6410-wdt
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then:
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properties:
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clocks:
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items:
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- description: Bus clock, which is also a source clock
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clock-names:
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items:
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- const: watchdog
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samsung,cluster-index: false
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samsung,syscon-phandle: false
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unevaluatedProperties: false
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examples:
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- |
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watchdog@101d0000 {
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compatible = "samsung,exynos5250-wdt";
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reg = <0x101D0000 0x100>;
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interrupts = <0 42 0>;
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clocks = <&clock 336>;
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clock-names = "watchdog";
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samsung,syscon-phandle = <&pmu_syscon>;
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};
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