diff options
| author | Sven Peter <sven@kernel.org> | 2025-06-10 15:29:43 +0000 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2025-07-24 09:47:33 +0100 |
| commit | 51bb1f6d4694cd84491847ea59eb194311b7d7f8 (patch) | |
| tree | 5db8b1a892980b862634659ba8af4b90dc98f5c2 | |
| parent | 0f0a7bd04e7e00cef6da5f4955749d6f1fc27b32 (diff) | |
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: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Reviewed-by: "Rob Herring (Arm)" <robh@kernel.org>
Signed-off-by: Sven Peter <sven@kernel.org>
Link: https://lore.kernel.org/r/20250610-smc-6-15-v7-2-556cafd771d3@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/power/reset/apple,smc-reboot.yaml | 40 | ||||
| -rw-r--r-- | MAINTAINERS | 1 |
2 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/power/reset/apple,smc-reboot.yaml b/Documentation/devicetree/bindings/power/reset/apple,smc-reboot.yaml new file mode 100644 index 000000000000..ce5ed88493cd --- /dev/null +++ b/Documentation/devicetree/bindings/power/reset/apple,smc-reboot.yaml @@ -0,0 +1,40 @@ +# 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 diff --git a/MAINTAINERS b/MAINTAINERS index 68097b1a4425..1dd004f7dff6 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -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 |