linux-kernel - Re: [PATCH 1/2] dt-bindings: hwmon: ti,ina2xx: Add alert-polarity property

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Message-ID: <20240603154728.GA480397-robh@kernel.org>
Date: Mon, 3 Jun 2024 10:47:28 -0500
From: Rob Herring <robh@...nel.org>
To: Amna Waseem <Amna.Waseem@...s.com>
Cc: Jean Delvare <jdelvare@...e.com>, Guenter Roeck <linux@...ck-us.net>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk@...nel.org>, linux-hwmon@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel@...s.com
Subject: Re: [PATCH 1/2] dt-bindings: hwmon: ti,ina2xx: Add alert-polarity
 property

On Wed, May 29, 2024 at 08:07:14AM +0200, Amna Waseem wrote:
> Add a property to the binding to configure the Alert Polarity.
> Alert pin is asserted based on the value of Alert Polarity bit of
> Mask/Enable register. It is by default 0 which means Alert pin is
> configured to be active low. To configure it to active high, set
> alert-polarity property value to 1.
> 
> Signed-off-by: Amna Waseem <Amna.Waseem@...s.com>
> ---
>  Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml b/Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml
> index df86c2c92037..a3f0fd71fcc6 100644
> --- a/Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml
> +++ b/Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml
> @@ -66,6 +66,14 @@ properties:
>      description: phandle to the regulator that provides the VS supply typically
>        in range from 2.7 V to 5.5 V.
>  
> +  alert-polarity:
> +    description: |
> +      Alert polarity bit value of Mask/Enable register. Alert pin is asserted
> +      based on the value of Alert polarity Bit. Default value is active low.
> +      0 selects active low, 1 selects active high.
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    enum: [0, 1]

This is alert as in SMBus Alert? That's handled as an interrupt, but 
this binding has no interrupt property. And the interrupt binding 
provides a way already to specify active trigger state. Why do we need a 
second way to do this?

Rob