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dt-bindings: timer: renesas: tmu: Convert to json-schema
Convert the Renesas R-Mobile/R-Car Timer Unit (TMU) Device Tree binding documentation to json-schema. Document missing properties. Update the example to match reality. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Link: https://lore.kernel.org/r/20201110162014.3290109-3-geert+renesas@glider.be
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Geert Uytterhoeven
Daniel Lezcano
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* Renesas R-Mobile/R-Car Timer Unit (TMU)
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The TMU is a 32-bit timer/counter with configurable clock inputs and
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programmable compare match.
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Channels share hardware resources but their counter and compare match value
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are independent. The TMU hardware supports up to three channels.
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Required Properties:
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- compatible: must contain one or more of the following:
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- "renesas,tmu-r8a7740" for the r8a7740 TMU
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- "renesas,tmu-r8a774a1" for the r8a774A1 TMU
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- "renesas,tmu-r8a774b1" for the r8a774B1 TMU
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- "renesas,tmu-r8a774c0" for the r8a774C0 TMU
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- "renesas,tmu-r8a774e1" for the r8a774E1 TMU
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- "renesas,tmu-r8a7778" for the r8a7778 TMU
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- "renesas,tmu-r8a7779" for the r8a7779 TMU
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- "renesas,tmu-r8a77970" for the r8a77970 TMU
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- "renesas,tmu-r8a77980" for the r8a77980 TMU
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- "renesas,tmu" for any TMU.
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This is a fallback for the above renesas,tmu-* entries
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- reg: base address and length of the registers block for the timer module.
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- interrupts: interrupt-specifier for the timer, one per channel.
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- clocks: a list of phandle + clock-specifier pairs, one for each entry
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in clock-names.
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- clock-names: must contain "fck" for the functional clock.
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Optional Properties:
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- #renesas,channels: number of channels implemented by the timer, must be 2
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or 3 (if not specified the value defaults to 3).
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Example: R8A7779 (R-Car H1) TMU0 node
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tmu0: timer@ffd80000 {
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compatible = "renesas,tmu-r8a7779", "renesas,tmu";
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reg = <0xffd80000 0x30>;
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interrupts = <0 32 IRQ_TYPE_LEVEL_HIGH>,
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<0 33 IRQ_TYPE_LEVEL_HIGH>,
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<0 34 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&mstp0_clks R8A7779_CLK_TMU0>;
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clock-names = "fck";
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#renesas,channels = <3>;
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};
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99
Documentation/devicetree/bindings/timer/renesas,tmu.yaml
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99
Documentation/devicetree/bindings/timer/renesas,tmu.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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$id: http://devicetree.org/schemas/timer/renesas,tmu.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Renesas R-Mobile/R-Car Timer Unit (TMU)
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maintainers:
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- Geert Uytterhoeven <geert+renesas@glider.be>
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- Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
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description:
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The TMU is a 32-bit timer/counter with configurable clock inputs and
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programmable compare match.
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Channels share hardware resources but their counter and compare match value
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are independent. The TMU hardware supports up to three channels.
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properties:
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compatible:
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items:
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- enum:
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- renesas,tmu-r8a7740 # R-Mobile A1
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- renesas,tmu-r8a774a1 # RZ/G2M
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- renesas,tmu-r8a774b1 # RZ/G2N
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- renesas,tmu-r8a774c0 # RZ/G2E
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- renesas,tmu-r8a774e1 # RZ/G2H
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- renesas,tmu-r8a7778 # R-Car M1A
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- renesas,tmu-r8a7779 # R-Car H1
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- renesas,tmu-r8a77970 # R-Car V3M
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- renesas,tmu-r8a77980 # R-Car V3H
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- const: renesas,tmu
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reg:
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maxItems: 1
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interrupts:
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minItems: 2
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maxItems: 3
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clocks:
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maxItems: 1
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clock-names:
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const: fck
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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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'#renesas,channels':
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description:
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Number of channels implemented by the timer.
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [ 2, 3 ]
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default: 3
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required:
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- compatible
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- reg
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- interrupts
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- clocks
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- clock-names
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- power-domains
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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,tmu-r8a7740
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- renesas,tmu-r8a7778
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- renesas,tmu-r8a7779
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then:
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required:
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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/r8a7779-clock.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/power/r8a7779-sysc.h>
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tmu0: timer@ffd80000 {
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compatible = "renesas,tmu-r8a7779", "renesas,tmu";
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reg = <0xffd80000 0x30>;
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interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&mstp0_clks R8A7779_CLK_TMU0>;
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clock-names = "fck";
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power-domains = <&sysc R8A7779_PD_ALWAYS_ON>;
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#renesas,channels = <3>;
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};
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