linux-kernel - Re: [PATCH v2 1/2] dt-bindings: hwmon: ti,ina2xx: Add ti,alert-polarity property

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Date: Wed, 29 May 2024 09:20:06 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Conor Dooley <conor@...nel.org>, Amna Waseem <Amna.Waseem@...s.com>
Cc: Jean Delvare <jdelvare@...e.com>, Rob Herring <robh@...nel.org>,
 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 v2 1/2] dt-bindings: hwmon: ti,ina2xx: Add
 ti,alert-polarity property

On 5/29/24 09:17, Conor Dooley wrote:
> On Wed, May 29, 2024 at 11:47:44AM +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 open collector. Value of 1 maps to
>> Inverted (active high open collector).
>>
>> 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..5a16d2d94587 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.
>>   
>> +  ti,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 Normal
>> +      (0 which maps to active-low open collector). The other value is Inverted
>> +      (1 which maps to active-high open collector).
>> +    $ref: /schemas/types.yaml#/definitions/uint32
>> +    enum: [0, 1]
> 
> There's no need for this to have a value, it's sufficient to be a flag
> of "ti,alert-active-high". Present would mean active-high and absent
> active-low. This has the added benefit the devicetree node being
> understandable to a reader.
> 

Agreed, makes sense. Even better, at the same time simplifies the code.

Guenter