On 26/06/2025 16:04, muhammed.efecetin.67@gmail.com wrote:
> From: Muhammed Efe Cetin <efectn@protonmail.com>
>
> Add fan controlling step property which is used by Khadas Edge 2.
>
> Signed-off-by: Muhammed Efe Cetin <efectn@protonmail.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
>