Commit 51bb1f6d authored by Sven Peter's avatar Sven Peter Committed by Lee Jones
Browse files

dt-bindings: power: reboot: Add Apple Mac SMC Reboot Controller 



On Apple Silicon machines a clean shutdown or reboot requires
talking to SMC and writing to NVMEM cells. Add a binding for
this MFD sub-device.

Reviewed-by: default avatarAlyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: default avatarNeal Gompa <neal@gompa.dev>
Reviewed-by: default avatar"Rob Herring (Arm)" <robh@kernel.org>
Signed-off-by: default avatarSven Peter <sven@kernel.org>
Link: https://lore.kernel.org/r/20250610-smc-6-15-v7-2-556cafd771d3@kernel.org


Signed-off-by: default avatarLee Jones <lee@kernel.org>
parent 0f0a7bd0

Documentation/devicetree/bindings/power/reset/apple,smc-reboot.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/power/reset/apple,smc-reboot.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: Apple SMC Reboot Controller



description:

  The Apple System Management Controller (SMC) provides reboot functionality

  on Apple Silicon SoCs. It uses NVMEM cells to store and track various

  system state information related to boot, shutdown, and panic events.



maintainers:

  - Sven Peter <sven@kernel.org>



properties:

  compatible:

    const: apple,smc-reboot



  nvmem-cells:

    items:

      - description: Flag indicating shutdown (as opposed to reboot)

      - description: Stage at which the boot process stopped (0x30 for normal boot)

      - description: Counter for boot errors

      - description: Counter for system panics



  nvmem-cell-names:

    items:

      - const: shutdown_flag

      - const: boot_stage

      - const: boot_error_count

      - const: panic_count



required:

  - compatible

  - nvmem-cells

  - nvmem-cell-names



additionalProperties: false

MAINTAINERS

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@@ -2346,6 +2346,7 @@ F: Documentation/devicetree/bindings/nvmem/apple,spmi-nvmem.yaml 
F:	Documentation/devicetree/bindings/pci/apple,pcie.yaml

F:	Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml

F:	Documentation/devicetree/bindings/power/apple*

F:	Documentation/devicetree/bindings/power/reset/apple,smc-reboot.yaml

F:	Documentation/devicetree/bindings/pwm/apple,s5l-fpwm.yaml

F:	Documentation/devicetree/bindings/spi/apple,spi.yaml

F:	Documentation/devicetree/bindings/spmi/apple,spmi.yaml