1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/rtc/apple,smc-rtc.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Apple SMC RTC 8 9description: 10 Apple Silicon Macs (M1, etc.) have an RTC that is part of the PMU IC, 11 but most of the PMU functionality is abstracted out by the SMC. 12 An additional RTC offset stored inside NVMEM is required to compute 13 the current date/time. 14 15maintainers: 16 - Sven Peter <sven@kernel.org> 17 18properties: 19 compatible: 20 const: apple,smc-rtc 21 22 nvmem-cells: 23 items: 24 - description: 48bit RTC offset, specified in 32768 (2^15) Hz clock ticks 25 26 nvmem-cell-names: 27 items: 28 - const: rtc_offset 29 30required: 31 - compatible 32 - nvmem-cells 33 - nvmem-cell-names 34 35additionalProperties: false 36