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dt-bindings: watchdog: Add Renesas WWDT
Describe the Window Watchdog Timer found on Renesas R-Car SoCs from late
Gen3 onwards.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
authored by
Wolfram Sang
and committed by
Wim Van Sebroeck
ece1ad19
fbd10d96
+114
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Documentation/devicetree/bindings/watchdog/renesas,rcar-gen3-wwdt.yaml
+114
Documentation/devicetree/bindings/watchdog/renesas,rcar-gen3-wwdt.yaml
···
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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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$id: http://devicetree.org/schemas/watchdog/renesas,rcar-gen3-wwdt.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Renesas Window Watchdog Timer (WWDT) Controller
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maintainers:
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- Wolfram Sang <wsa+renesas@sang-engineering.com>
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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,r8a77970-wwdt # R-Car V3M
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- renesas,r8a77980-wwdt # R-Car V3H
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- const: renesas,rcar-gen3-wwdt
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- items:
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- enum:
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- renesas,r8a779a0-wwdt # R-Car V3U
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- renesas,r8a779f0-wwdt # R-Car S4
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- renesas,r8a779g0-wwdt # R-Car V4H
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- renesas,r8a779h0-wwdt # R-Car V4M
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- const: renesas,rcar-gen4-wwdt
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reg:
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maxItems: 1
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interrupts:
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items:
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- description: Pretimeout, 75% of overflow reached
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- description: Error occurred
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interrupt-names:
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items:
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- const: pretimeout
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- const: error
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clocks:
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items:
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- description: Counting clock
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- description: Bus clock
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clock-names:
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items:
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- const: cnt
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- const: bus
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resets:
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minItems: 1
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maxItems: 2
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reset-names:
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minItems: 1
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items:
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- const: cnt
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- const: bus
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power-domains:
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maxItems: 1
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required:
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- compatible
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- reg
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- interrupts
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- interrupt-names
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- clocks
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- clock-names
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- resets
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- reset-names
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- power-domains
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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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- renesas,r8a779a0-wwdt
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- renesas,r8a779f0-wwdt
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then:
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properties:
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resets:
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minItems: 2
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reset-names:
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minItems: 2
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/r8a779g0-cpg-mssr.h>
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#include <dt-bindings/power/r8a779g0-sysc.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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watchdog@ffc90000 {
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compatible = "renesas,r8a779g0-wwdt",
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"renesas,rcar-gen4-wwdt";
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reg = <0xffc90000 0x10>;
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interrupts = <GIC_SPI 310 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 311 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "pretimeout", "error";
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clocks = <&cpg CPG_CORE R8A779G0_CLK_R>,
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<&cpg CPG_CORE R8A779G0_CLK_SASYNCRT>;
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clock-names = "cnt", "bus";
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power-domains = <&sysc R8A779G0_PD_ALWAYS_ON>;
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resets = <&cpg 1200>;
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reset-names = "cnt";
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};