[PATCH v2 1/2] dt-bindings: thermal: mediatek: Make resets optional for MT8196

[Chen-Yu Tsai]

On Tue, Jul 21, 2026 at 6:52 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno at collabora.com> wrote:
>
> Both LVTS-AP and LVTS-MCU may be shared with SoC-internal MCUs
> running some sort of firmware that checks thermals in order to
> scale frequency, or to take action for critical SoC thermal
> protection - and this is seen on most MT8196 boards.

Yes the number of MCUs on this SoC is a bit crazy, and the OS
has almost no control over them. :D

> Make resets optional, as doing a HW reset on such boards will
> result in either an immediate thermal protect shutdown or in
> a rather important and usually permanent system slowdown.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>

Reviewed-by: Chen-Yu Tsai <wenst at chromium.org>

> ---
>  .../bindings/thermal/mediatek,lvts-thermal.yaml     | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml b/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
> index 975235130670..29f431fcdcd5 100644
> --- a/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
> +++ b/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
> @@ -94,12 +94,23 @@ allOf:
>          nvmem-cell-names:
>            minItems: 2
>
> +  - if:
> +      properties:
> +        compatible:
> +          not:
> +            contains:
> +              enum:
> +                - mediatek,mt8196-lvts-ap
> +                - mediatek,mt8196-lvts-mcu
> +    then:
> +      required:
> +        - resets
> +
>  required:
>    - compatible
>    - reg
>    - interrupts
>    - clocks
> -  - resets
>    - nvmem-cells
>    - nvmem-cell-names
>
> --
> 2.55.0
>