From: Hugo Villeneuve <hvilleneuve@dimonoff.com>

Add common property that can be reused by other bindings.

Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
---
Note: a similar property is used by gpio-matrix-keypad.yaml:
  col-scan-delay-us
---
 Documentation/devicetree/bindings/input/input.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/input.yaml b/Documentation/devicetree/bindings/input/input.yaml
index 502e0b7eb500a..14652d324e2ca 100644
--- a/Documentation/devicetree/bindings/input/input.yaml
+++ b/Documentation/devicetree/bindings/input/input.yaml
@@ -66,6 +66,14 @@ properties:
       reset automatically. Device with key pressed reset feature can specify
       this property.
 
+  settling-time-us:
+    description:
+      Delay, in microseconds, when activating an output line/col/row GPIO
+      before we can reliably read other input GPIOs that maybe affected by this
+      output. This can be the case for an output with a RC circuit that affects
+      ramp-up/down times.
+    default: 0
+
 dependencies:
   linux,input-type: [ "linux,code" ]
 
-- 
2.47.3

On Thu, Mar 05, 2026 at 02:20:48PM -0500, Hugo Villeneuve wrote:
> From: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> 
> Add common property that can be reused by other bindings.
> 
> Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> ---
> Note: a similar property is used by gpio-matrix-keypad.yaml:
>   col-scan-delay-us
> ---
>  Documentation/devicetree/bindings/input/input.yaml | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/input/input.yaml b/Documentation/devicetree/bindings/input/input.yaml
> index 502e0b7eb500a..14652d324e2ca 100644
> --- a/Documentation/devicetree/bindings/input/input.yaml
> +++ b/Documentation/devicetree/bindings/input/input.yaml
> @@ -66,6 +66,14 @@ properties:
>        reset automatically. Device with key pressed reset feature can specify
>        this property.
>  
> +  settling-time-us:
> +    description:
> +      Delay, in microseconds, when activating an output line/col/row GPIO
> +      before we can reliably read other input GPIOs that maybe affected by this
> +      output. This can be the case for an output with a RC circuit that affects
> +      ramp-up/down times.

Whether it is GPIOs or not depends on the implementation. Just drop 
'GPIO' and replace 'GPIOs' with 'lines'.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>

Rob

Hi Rob,

On Thu, 12 Mar 2026 10:02:10 -0500
Rob Herring <robh@kernel.org> wrote:

> On Thu, Mar 05, 2026 at 02:20:48PM -0500, Hugo Villeneuve wrote:
> > From: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> > 
> > Add common property that can be reused by other bindings.
> > 
> > Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> > ---
> > Note: a similar property is used by gpio-matrix-keypad.yaml:
> >   col-scan-delay-us
> > ---
> >  Documentation/devicetree/bindings/input/input.yaml | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/input/input.yaml b/Documentation/devicetree/bindings/input/input.yaml
> > index 502e0b7eb500a..14652d324e2ca 100644
> > --- a/Documentation/devicetree/bindings/input/input.yaml
> > +++ b/Documentation/devicetree/bindings/input/input.yaml
> > @@ -66,6 +66,14 @@ properties:
> >        reset automatically. Device with key pressed reset feature can specify
> >        this property.
> >  
> > +  settling-time-us:
> > +    description:
> > +      Delay, in microseconds, when activating an output line/col/row GPIO
> > +      before we can reliably read other input GPIOs that maybe affected by this
> > +      output. This can be the case for an output with a RC circuit that affects
> > +      ramp-up/down times.
> 
> Whether it is GPIOs or not depends on the implementation. Just drop 
> 'GPIO' and replace 'GPIOs' with 'lines'.

Ok, will do for V5.

Hugo

> 
> Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
> 
> Rob
>