dt-bindings: watchdog: renesas-wdt: Convert to json-schema
Convert the Renesas Watchdog Timer (WDT) Controller Device Tree binding documentation to json-schema. Add missing "renesas,r8a77980-wdt" compatible value. Document missing properties. Update the example to match reality. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by: Rob Herring <robh@kernel.org>
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Geert Uytterhoeven
Rob Herring
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Renesas Watchdog Timer (WDT) Controller
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Required properties:
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- compatible : Must be "renesas,<soctype>-wdt", followed by a generic
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fallback compatible string when compatible with the generic
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version.
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Examples with soctypes are:
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- "renesas,r8a7743-wdt" (RZ/G1M)
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- "renesas,r8a7744-wdt" (RZ/G1N)
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- "renesas,r8a7745-wdt" (RZ/G1E)
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- "renesas,r8a77470-wdt" (RZ/G1C)
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- "renesas,r8a774a1-wdt" (RZ/G2M)
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- "renesas,r8a774b1-wdt" (RZ/G2N)
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- "renesas,r8a774c0-wdt" (RZ/G2E)
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- "renesas,r8a7790-wdt" (R-Car H2)
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- "renesas,r8a7791-wdt" (R-Car M2-W)
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- "renesas,r8a7792-wdt" (R-Car V2H)
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- "renesas,r8a7793-wdt" (R-Car M2-N)
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- "renesas,r8a7794-wdt" (R-Car E2)
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- "renesas,r8a7795-wdt" (R-Car H3)
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- "renesas,r8a7796-wdt" (R-Car M3-W)
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- "renesas,r8a77961-wdt" (R-Car M3-W+)
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- "renesas,r8a77965-wdt" (R-Car M3-N)
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- "renesas,r8a77970-wdt" (R-Car V3M)
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- "renesas,r8a77990-wdt" (R-Car E3)
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- "renesas,r8a77995-wdt" (R-Car D3)
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- "renesas,r7s72100-wdt" (RZ/A1)
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- "renesas,r7s9210-wdt" (RZ/A2)
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The generic compatible string must be:
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- "renesas,rza-wdt" for RZ/A
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- "renesas,rcar-gen2-wdt" for R-Car Gen2 and RZ/G1
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- "renesas,rcar-gen3-wdt" for R-Car Gen3 and RZ/G2
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- reg : Should contain WDT registers location and length
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- clocks : the clock feeding the watchdog timer.
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Optional properties:
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- timeout-sec : Contains the watchdog timeout in seconds
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- power-domains : the power domain the WDT belongs to
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- interrupts: Some WDTs have an interrupt when used in interval timer mode
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Examples:
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wdt0: watchdog@e6020000 {
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compatible = "renesas,r8a7795-wdt", "renesas,rcar-gen3-wdt";
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reg = <0 0xe6020000 0 0x0c>;
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clocks = <&cpg CPG_MOD 402>;
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power-domains = <&cpg>;
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timeout-sec = <60>;
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};
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/watchdog/renesas,wdt.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Renesas Watchdog Timer (WDT) Controller
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maintainers:
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- Wolfram Sang <wsa+renesas@sang-engineering.com>
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- Geert Uytterhoeven <geert+renesas@glider.be>
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allOf:
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- $ref: "watchdog.yaml#"
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properties:
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compatible:
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oneOf:
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- items:
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- enum:
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- renesas,r7s72100-wdt # RZ/A1
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- renesas,r7s9210-wdt # RZ/A2
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- const: renesas,rza-wdt # RZ/A
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- items:
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- enum:
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- renesas,r8a7743-wdt # RZ/G1M
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- renesas,r8a7744-wdt # RZ/G1N
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- renesas,r8a7745-wdt # RZ/G1E
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- renesas,r8a77470-wdt # RZ/G1C
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- renesas,r8a7790-wdt # R-Car H2
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- renesas,r8a7791-wdt # R-Car M2-W
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- renesas,r8a7792-wdt # R-Car V2H
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- renesas,r8a7793-wdt # R-Car M2-N
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- renesas,r8a7794-wdt # R-Car E2
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- const: renesas,rcar-gen2-wdt # R-Car Gen2 and RZ/G1
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- items:
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- enum:
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- renesas,r8a774a1-wdt # RZ/G2M
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- renesas,r8a774b1-wdt # RZ/G2N
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- renesas,r8a774c0-wdt # RZ/G2E
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- renesas,r8a7795-wdt # R-Car H3
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- renesas,r8a7796-wdt # R-Car M3-W
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- renesas,r8a77961-wdt # R-Car M3-W+
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- renesas,r8a77965-wdt # R-Car M3-N
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- renesas,r8a77970-wdt # R-Car V3M
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- renesas,r8a77980-wdt # R-Car V3H
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- renesas,r8a77990-wdt # R-Car E3
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- renesas,r8a77995-wdt # R-Car D3
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- const: renesas,rcar-gen3-wdt # R-Car Gen3 and RZ/G2
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clocks:
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maxItems: 1
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power-domains:
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maxItems: 1
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resets:
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maxItems: 1
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timeout-sec: true
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required:
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- compatible
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- reg
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- clocks
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if:
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not:
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properties:
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compatible:
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contains:
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enum:
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- renesas,rza-wdt
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then:
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required:
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- power-domains
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- resets
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/r8a7795-cpg-mssr.h>
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#include <dt-bindings/power/r8a7795-sysc.h>
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wdt0: watchdog@e6020000 {
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compatible = "renesas,r8a7795-wdt", "renesas,rcar-gen3-wdt";
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reg = <0xe6020000 0x0c>;
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clocks = <&cpg CPG_MOD 402>;
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power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
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resets = <&cpg 402>;
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timeout-sec = <60>;
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};
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