linux-kernel - Re: [PATCH v5 4/7] dt-bindings: input: matrix_keypad

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Message-ID: <Z71nMdTvyIg5a85Y@google.com>
Date: Mon, 24 Feb 2025 22:46:09 -0800
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Manuel Traut <manuel.traut@...com>
Cc: Markus Burri <markus.burri@...com>, linux-kernel@...r.kernel.org,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Marek Vasut <marek.vasut@...il.com>, linux-input@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v5 4/7] dt-bindings: input: matrix_keypad - add missing
 property

On Wed, Feb 19, 2025 at 05:42:00PM +0100, Manuel Traut wrote:
> On Fri, Jan 10, 2025 at 06:49:03AM +0100, Markus Burri wrote:
> > The property is implemented in the driver but not described in dt-bindings.
> > Add missing property 'gpio-activelow' to DT schema.
> > 
> > Signed-off-by: Markus Burri <markus.burri@...com>
> 
> Reviewed-by: Manuel Traut <manuel.traut@...com>
> 
> > ---
> >  .../devicetree/bindings/input/gpio-matrix-keypad.yaml       | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/input/gpio-matrix-keypad.yaml b/Documentation/devicetree/bindings/input/gpio-matrix-keypad.yaml
> > index 0f348b9..9c91224 100644
> > --- a/Documentation/devicetree/bindings/input/gpio-matrix-keypad.yaml
> > +++ b/Documentation/devicetree/bindings/input/gpio-matrix-keypad.yaml
> > @@ -40,6 +40,12 @@ properties:
> >      type: boolean
> >      description: Do not enable autorepeat feature.
> >  
> > +  gpio-activelow:
> > +    type: boolean
> > +    deprecated: true
> > +    description:
> > +      The GPIOs are low active (deprecated).
> > +      Use the GPIO-flags in gpio controller instead of this property.

No, we unfortunately can not rely on GPIO-flags. This is not how driver
works: current driver behavior is to force GPIOs as active high if the
property is missing and ignore polarity specified in GPIO property.

Thanks.

-- 
Dmitry