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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>
94 lines
2.0 KiB
YAML
94 lines
2.0 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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$id: http://devicetree.org/schemas/mfd/apple,smc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Apple Mac System Management Controller
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maintainers:
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- Sven Peter <sven@kernel.org>
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description:
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Apple Mac System Management Controller implements various functions
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such as GPIO, RTC, power, reboot.
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properties:
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compatible:
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oneOf:
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- items:
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- const: apple,t6020-smc
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- const: apple,t8103-smc
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- items:
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- enum:
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# Do not add additional SoC to this list.
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- apple,t6000-smc
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- apple,t8103-smc
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- apple,t8112-smc
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- const: apple,smc
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reg:
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items:
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- description: SMC area
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- description: SRAM area
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reg-names:
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items:
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- const: smc
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- const: sram
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mboxes:
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maxItems: 1
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gpio:
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$ref: /schemas/gpio/apple,smc-gpio.yaml
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reboot:
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$ref: /schemas/power/reset/apple,smc-reboot.yaml
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rtc:
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$ref: /schemas/rtc/apple,smc-rtc.yaml
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additionalProperties: false
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required:
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- compatible
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- reg
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- reg-names
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- mboxes
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examples:
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- |
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soc {
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#address-cells = <2>;
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#size-cells = <2>;
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smc@23e400000 {
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compatible = "apple,t8103-smc", "apple,smc";
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reg = <0x2 0x3e400000 0x0 0x4000>,
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<0x2 0x3fe00000 0x0 0x100000>;
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reg-names = "smc", "sram";
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mboxes = <&smc_mbox>;
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smc_gpio: gpio {
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compatible = "apple,smc-gpio";
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gpio-controller;
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#gpio-cells = <2>;
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};
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reboot {
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compatible = "apple,smc-reboot";
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nvmem-cells = <&shutdown_flag>, <&boot_stage>,
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<&boot_error_count>, <&panic_count>;
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nvmem-cell-names = "shutdown_flag", "boot_stage",
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"boot_error_count", "panic_count";
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};
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rtc {
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compatible = "apple,smc-rtc";
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nvmem-cells = <&rtc_offset>;
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nvmem-cell-names = "rtc_offset";
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};
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};
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};
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