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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/rtc/apple,smc-rtc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Apple SMC RTC
description:
Apple Silicon Macs (M1, etc.) have an RTC that is part of the PMU IC,
but most of the PMU functionality is abstracted out by the SMC.
An additional RTC offset stored inside NVMEM is required to compute
the current date/time.
maintainers:
- Sven Peter <sven@kernel.org>
properties:
compatible:
const: apple,smc-rtc
nvmem-cells:
items:
- description: 48bit RTC offset, specified in 32768 (2^15) Hz clock ticks
nvmem-cell-names:
items:
- const: rtc_offset
required:
- compatible
- nvmem-cells
- nvmem-cell-names
additionalProperties: false
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