linux-kernel - Re: [PATCH 1/5] dt-bindings: mfd: khadas-mcu: add cooling-levels property

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <60f437b3-2780-4bd3-95a4-d0453dcb83e7@linaro.org>
Date: Thu, 26 Jun 2025 16:12:50 +0200
From: neil.armstrong@...aro.org
To: muhammed.efecetin.67@...il.com, linux-rockchip@...ts.infradead.org
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, robh+dt@...nel.org,
 krzysztof.kozlowski+dt@...aro.org, heiko@...ech.de, lee@...nel.org,
 rafael@...nel.org, efectn@...tonmail.com, daniel.lezcano@...aro.org
Subject: Re: [PATCH 1/5] dt-bindings: mfd: khadas-mcu: add cooling-levels
 property

On 26/06/2025 16:04, muhammed.efecetin.67@...il.com wrote:
> From: Muhammed Efe Cetin <efectn@...tonmail.com>
> 
> Add fan controlling step property which is used by Khadas Edge 2.
> 
> Signed-off-by: Muhammed Efe Cetin <efectn@...tonmail.com>
> ---
>   Documentation/devicetree/bindings/mfd/khadas,mcu.yaml | 9 ++++++++-
>   1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml b/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
> index 084960fd5..f69643aae 100644
> --- a/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
> +++ b/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
> @@ -11,7 +11,7 @@ maintainers:
>   
>   description: |
>     Khadas embeds a microcontroller on their VIM and Edge boards adding some
> -  system feature as PWM Fan control (for VIM2 rev14 or VIM3), User memory
> +  system feature as PWM Fan control (for VIM2 rev14, VIM3, Edge2), User memory
>     storage, IR/Key resume control, system power LED control and more.
>   
>   properties:
> @@ -22,6 +22,13 @@ properties:
>     "#cooling-cells": # Only needed for boards having FAN control feature
>       const: 2
>   
> +  cooling-levels:
> +    description:
> +      Max speed of PWM fan, from 0 to 100. This property is necessary for Khadas Edge 2.
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    items:
> +      maximum: 100

The cooling level can be detected dynamically by reading the MCU register, so
just set the max_level to 100 when edge2 is detected, and drop this property.

Neil

> +
>     reg:
>       maxItems: 1
>