[PATCH v7 2/3] dt-bindings: hwmon: emc2305: Add fan-shutdown-percent property

[Florin Leotescu]

On Wed, Apr 29, 2026 at 07:18:04PM +0100, Conor Dooley wrote:
> On Wed, Apr 29, 2026 at 09:59:54AM +0300, florin.leotescu at oss.nxp.com wrote:
> > From: Florin Leotescu <florin.leotescu at nxp.com>
> > 
> > The EMC2305 fan controller supports multiple independent PWM fan
> > outputs. Some systems require fans to enter a defined safe state
> > during system shutdown or reboot handoff, until firmware or the next
> > boot stage reconfigures the controller.
> > 
> > Add an optional "fan-shutdown-percent" property to fan child nodes
> > allowing the PWM duty cycle applied during shutdown to be configured
> > per fan output.
> > 
> > Signed-off-by: Florin Leotescu <florin.leotescu at nxp.com>
> 
> Why didn't you pick up my tag from here:
> https://lore.kernel.org/all/20260407-slang-scoff-795164352c62@spud/
>

Apologies, I missed your Acked-by tag when preparing the series.
I will include it in the next revision.

> > ---
> >  .../devicetree/bindings/hwmon/microchip,emc2305.yaml      | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml
> > index d3f06ebc19fa..8c2548539d7f 100644
> > --- a/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml
> > +++ b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml
> > @@ -54,6 +54,12 @@ patternProperties:
> >            The fan number used to determine the associated PWM channel.
> >          maxItems: 1
> >  
> > +      fan-shutdown-percent:
> > +        description:
> > +          PWM duty cycle in percent applied to the fan during shutdown.
> > +        minimum: 0
> > +        maximum: 100
> > +
> >      required:
> >        - reg
> >  
> > @@ -80,12 +86,14 @@ examples:
> >              fan at 0 {
> >                  reg = <0x0>;
> >                  pwms = <&fan_controller 26000 PWM_POLARITY_INVERTED 1>;
> > +                fan-shutdown-percent = <100>;
> >                  #cooling-cells = <2>;
> >              };
> >  
> >              fan at 1 {
> >                  reg = <0x1>;
> >                  pwms = <&fan_controller 26000 0 1>;
> > +                fan-shutdown-percent = <50>;
> >                  #cooling-cells = <2>;
> >              };
> >  
> > -- 
> > 2.34.1
> >