linux-kernel - Re: [PATCH v2 10/11] arm64: dts: apple: Add common hwmon sensors and fans

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Message-ID: <20250925220254.GE637503@robin.jannau.net>
Date: Fri, 26 Sep 2025 00:02:54 +0200
From: Janne Grunau <j@...nau.net>
To: James Calligeros <jcalligeros99@...il.com>
Cc: Sven Peter <sven@...nel.org>, Alyssa Rosenzweig <alyssa@...enzweig.io>,
	Neal Gompa <neal@...pa.dev>, Lee Jones <lee@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Jean Delvare <jdelvare@...e.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>, asahi@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-rtc@...r.kernel.org,
	linux-hwmon@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: [PATCH v2 10/11] arm64: dts: apple: Add common hwmon sensors and
 fans

On Wed, Aug 27, 2025 at 09:22:44PM +1000, James Calligeros wrote:
> Each Apple Silicon device exposes a unique set of sensors and fans,
> however some have been found to be reliably common across devices.
> 
> Add these as .dtsi files so that they can be combined with any
> device-specific sensors without excessive repetition.
> 
> Signed-off-by: James Calligeros <jcalligeros99@...il.com>
> ---
>  .../boot/dts/apple/hwmon-common.dtsi     | 37 +++++++++++++++++++++++++
>  .../boot/dts/apple/hwmon-fan-dual.dtsi   | 24 ++++++++++++++++
>  arch/arm64/boot/dts/apple/hwmon-fan.dtsi | 19 +++++++++++++
>  .../boot/dts/apple/hwmon-laptop.dtsi     | 35 +++++++++++++++++++++++
>  .../boot/dts/apple/hwmon-mac-mini.dtsi   | 17 ++++++++++++
>  5 files changed, 132 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/apple/hwmon-common.dtsi b/arch/arm64/boot/dts/apple/hwmon-common.dtsi
> new file mode 100644
> index 0000000000000000000000000000000000000000..bac4e44d3f9892fe8ad04125e47dcccb2bcf57a0
> --- /dev/null
> +++ b/arch/arm64/boot/dts/apple/hwmon-common.dtsi
> @@ -0,0 +1,37 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
> +/*
> + * Hardawre monitoring sensors expected to be found on all Apple Silicon devices

typo: "Hardawre"

> + *
> + * Copyright The Asahi Linux Contributors
> + */
> +
> +&smc {
> +	hwmon {
> +		compatible = "apple,smc-hwmon";

I think it woiuld make more sense to add the hwmon child node with the
compatible in the SoC *.dtsi and then only add the sensor nodes to
"&smc_hwmon" in these hwmon-*.dtsi files

Janne