# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/rtc/rtc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: RTC Generic Binding
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maintainers:
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- Alexandre Belloni <alexandre.belloni@bootlin.com>
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description: |
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This document describes generic bindings which can be used to
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describe Real Time Clock devices in a device tree.
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properties:
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$nodename:
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pattern: "^rtc(@.*|-[0-9a-f])*$"
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aux-voltage-chargeable:
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [0, 1]
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description: |
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Tells whether the battery/supercap of the RTC (if any) is
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chargeable or not:
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0: not chargeable
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1: chargeable
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quartz-load-femtofarads:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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The capacitive load of the quartz(x-tal), expressed in femto
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Farad (fF). The default value shall be listed (if optional),
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and likewise all valid values.
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start-year:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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If provided, the default hardware range supported by the RTC is
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shifted so the first usable year is the specified one.
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trickle-diode-disable:
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$ref: /schemas/types.yaml#/definitions/flag
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description:
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Do not use internal trickle charger diode. Should be given if
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internal trickle charger diode should be disabled.
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deprecated: true
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trickle-resistor-ohms:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Selected resistor for trickle charger. Should be given
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if trickle charger should be enabled.
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trickle-voltage-millivolt:
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description:
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Selected voltage for trickle charger. Should be given
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if trickle charger should be enabled and the trickle voltage is different
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from the RTC main power supply.
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wakeup-source:
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$ref: /schemas/types.yaml#/definitions/flag
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description:
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Enables wake up of host system on alarm.
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reset-source:
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$ref: /schemas/types.yaml#/definitions/flag
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description:
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The RTC is able to reset the machine.
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additionalProperties: true
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...
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