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Date: Wed, 15 Apr 2026 16:48:15 -0500
From: Rob Herring <robh@kernel.org>
To: Ronald Claveau <linux-kernel-dev@aliel.fr>
Cc: Neil Armstrong <neil.armstrong@linaro.org>, Lee Jones <lee@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Andi Shyti <andi.shyti@kernel.org>,
	Kevin Hilman <khilman@baylibre.com>,
	Jerome Brunet <jbrunet@baylibre.com>,
	Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	Beniamino Galvani <b.galvani@gmail.com>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Daniel Lezcano <daniel.lezcano@kernel.org>,
	Zhang Rui <rui.zhang@intel.com>, Lukasz Luba <lukasz.luba@arm.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Mark Brown <broonie@kernel.org>, linux-amlogic@lists.infradead.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-pm@vger.kernel.org
Subject: Re: [PATCH v2 1/8] dt-bindings: mfd: khadas: Add new compatible for
 Khadas VIM4 MCU
Message-ID: <20260415214815.GA602572-robh@kernel.org>
References: <20260403-add-mcu-fan-khadas-vim4-v2-0-70536b22439a@aliel.fr>
 <20260403-add-mcu-fan-khadas-vim4-v2-1-70536b22439a@aliel.fr>
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In-Reply-To: <20260403-add-mcu-fan-khadas-vim4-v2-1-70536b22439a@aliel.fr>

On Fri, Apr 03, 2026 at 06:08:34PM +0200, Ronald Claveau wrote:
> The Khadas VIM4 MCU register is slightly different
> from previous boards' MCU.
> This board also features a switchable power source for its fan.
> 
> Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
> ---
>  Documentation/devicetree/bindings/mfd/khadas,mcu.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml b/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
> index 084960fd5a1fd..67769ef5d58b1 100644
> --- a/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
> +++ b/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
> @@ -18,6 +18,7 @@ properties:
>    compatible:
>      enum:
>        - khadas,mcu # MCU revision is discoverable

The revision is no longer discoverable as was claimed?

> +      - khadas,vim4-mcu
>  
>    "#cooling-cells": # Only needed for boards having FAN control feature
>      const: 2
> @@ -25,6 +26,10 @@ properties:
>    reg:
>      maxItems: 1
>  
> +  fan-supply:
> +    description: Phandle to the regulator that powers the fan.
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +
>  required:
>    - compatible
>    - reg
> 
> -- 
> 2.49.0
>