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07049187e8
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. Reviewed-by: Mark Kettenis <kettenis@openbsd.org> Reviewed-by: Neal Gompa <neal@gompa.dev> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Sven Peter <sven@kernel.org> Signed-off-by: James Calligeros <jcalligeros99@gmail.com> Reviewd-by: Mark Kettenis <kettenis@openbsd.org> Link: https://patch.msgid.link/20251112-macsmc-subdevs-v5-1-728e4b91fe81@gmail.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
36 lines
811 B
YAML
36 lines
811 B
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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$id: http://devicetree.org/schemas/rtc/apple,smc-rtc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Apple SMC RTC
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description:
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Apple Silicon Macs (M1, etc.) have an RTC that is part of the PMU IC,
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but most of the PMU functionality is abstracted out by the SMC.
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An additional RTC offset stored inside NVMEM is required to compute
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the current date/time.
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maintainers:
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- Sven Peter <sven@kernel.org>
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properties:
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compatible:
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const: apple,smc-rtc
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nvmem-cells:
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items:
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- description: 48bit RTC offset, specified in 32768 (2^15) Hz clock ticks
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nvmem-cell-names:
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items:
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- const: rtc_offset
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required:
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- compatible
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- nvmem-cells
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- nvmem-cell-names
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additionalProperties: false
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