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The external crystal can be a second clock input. It is needed for the SCMP counting method which allows using crystals different than 32768Hz. It is also needed for an upcoming SoC which only supports the SCMP method. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20250526095801.35781-6-wsa+renesas@sang-engineering.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
75 lines
1.5 KiB
YAML
75 lines
1.5 KiB
YAML
# 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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$id: http://devicetree.org/schemas/rtc/renesas,rzn1-rtc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Renesas RZ/N1 SoCs Real-Time Clock
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maintainers:
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- Miquel Raynal <miquel.raynal@bootlin.com>
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allOf:
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- $ref: rtc.yaml#
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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,r9a06g032-rtc
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- const: renesas,rzn1-rtc
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reg:
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maxItems: 1
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interrupts:
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minItems: 3
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maxItems: 3
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interrupt-names:
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items:
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- const: alarm
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- const: timer
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- const: pps
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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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items:
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- const: hclk
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- const: xtal
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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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- power-domains
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/clock/r9a06g032-sysctrl.h>
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rtc@40006000 {
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compatible = "renesas,r9a06g032-rtc", "renesas,rzn1-rtc";
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reg = <0x40006000 0x1000>;
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interrupts = <GIC_SPI 66 IRQ_TYPE_EDGE_RISING>,
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<GIC_SPI 67 IRQ_TYPE_EDGE_RISING>,
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<GIC_SPI 68 IRQ_TYPE_EDGE_RISING>;
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interrupt-names = "alarm", "timer", "pps";
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clocks = <&sysctrl R9A06G032_HCLK_RTC>;
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clock-names = "hclk";
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power-domains = <&sysctrl>;
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start-year = <2000>;
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};
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