linux-kernel - Re: [PATCH v5 02/10] dt-bindings: power: reboot: Add Apple Mac SMC Reboot Controller

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Message-ID: <20250514205617.GA3020430-robh@kernel.org>
Date: Wed, 14 May 2025 15:56:17 -0500
From: Rob Herring <robh@...nel.org>
To: Sven Peter <sven@...npeter.dev>
Cc: Janne Grunau <j@...nau.net>, Alyssa Rosenzweig <alyssa@...enzweig.io>,
	Neal Gompa <neal@...pa.dev>, Hector Martin <marcan@...can.st>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Sebastian Reichel <sre@...nel.org>, Lee Jones <lee@...nel.org>,
	Marc Zyngier <maz@...nel.org>,
	"Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
	asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v5 02/10] dt-bindings: power: reboot: Add Apple Mac SMC
 Reboot Controller

On Sun, May 11, 2025 at 08:18:37AM +0000, Sven Peter wrote:
> 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@...enzweig.io>
> Signed-off-by: Sven Peter <sven@...npeter.dev>
> ---
>  .../bindings/power/reset/apple,smc-reboot.yaml     | 52 ++++++++++++++++++++++
>  MAINTAINERS                                        |  1 +
>  2 files changed, 53 insertions(+)
> 
> 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 0000000000000000000000000000000000000000..e55e524914c2f57f7acf239fdefcbdc7a993b69f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/reset/apple,smc-reboot.yaml
> @@ -0,0 +1,52 @@
> +# 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: |

Don't need '|' here.

> +  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.

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>