linux-kernel - Re: [PATCH V1 2/3] dt-bindings: power: sbs-battery: add polling interval property

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Message-ID: <4daabe4d-bebc-4072-b7c6-0c46ee087040@kernel.org>
Date: Mon, 29 Dec 2025 13:47:02 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn>,
 "sre@...nel.org" <sre@...nel.org>, "robh@...nel.org" <robh@...nel.org>,
 "krzk+dt@...nel.org" <krzk+dt@...nel.org>,
 "conor+dt@...nel.org" <conor+dt@...nel.org>,
 "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
 "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc: GEO-CHHER-bsp-development <bsp-development.geo@...ca-geosystems.com>
Subject: Re: [PATCH V1 2/3] dt-bindings: power: sbs-battery: add polling
 interval property

On 29/12/2025 10:50, LI Qingwu wrote:
> 
> 
>> -----Original Message-----
>> From: Krzysztof Kozlowski <krzk@...nel.org>
>> Sent: Monday, December 29, 2025 5:16 PM
>> To: LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn>; sre@...nel.org;
>> robh@...nel.org; krzk+dt@...nel.org; conor+dt@...nel.org;
>> linux-pm@...r.kernel.org; devicetree@...r.kernel.org;
>> linux-kernel@...r.kernel.org
>> Cc: GEO-CHHER-bsp-development
>> <bsp-development.geo@...ca-geosystems.com>
>> Subject: Re: [PATCH V1 2/3] dt-bindings: power: sbs-battery: add polling interval
>> property
>>
>> This email is not from Hexagon’s Office 365 instance. Please be careful while
>> clicking links, opening attachments, or replying to this email.
>>
>>
>> On 29/12/2025 09:56, LI Qingwu wrote:
>>> Add the optional sbs,monitoring-interval-ms property for SBS-compliant
>>> batteries to configure a periodic polling interval on systems without
>>> interrupt support. The driver periodically checks the battery status
>>> and notifies userspace of changes when this property is set, and
>>> ignores it when a GPIO interrupt is available.
>>>
>>> The property defaults to 0 to preserve existing behaviour.
>>>
>>> Signed-off-by: LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn>
>>> ---
>>>  .../bindings/power/supply/sbs,sbs-battery.yaml           | 9 +++++++++
>>>  1 file changed, 9 insertions(+)
>>>
>>> diff --git
>>> a/Documentation/devicetree/bindings/power/supply/sbs,sbs-battery.yaml
>>> b/Documentation/devicetree/bindings/power/supply/sbs,sbs-battery.yaml
>>> index 90b9d3d882a4..fbdd5dd5dda8 100644
>>> ---
>>> a/Documentation/devicetree/bindings/power/supply/sbs,sbs-battery.yaml
>>> +++ b/Documentation/devicetree/bindings/power/supply/sbs,sbs-battery.y
>>> +++ aml
>>> @@ -59,6 +59,15 @@ properties:
>>>        master implementation.
>>>      type: boolean
>>>
>>> +  sbs,monitoring-interval-ms:
>>> +    description:
>>> +      Polling interval in milliseconds for battery status monitoring on
>>> +      systems without interrupt support. The driver periodically checks
>>> +      the battery status and notifies userspace of changes. Ignored when
>>> +      GPIO interrupt is available.
>>
>>
>> You described the desired Linux feature or behavior, not the actual hardware.
>> The bindings are about the latter, so instead you need to rephrase the property
>> and its description to match actual hardware
>> capabilities/features/configuration etc.
>>
> 
> Thanks for the quick feedback!
> How about this?
> 
>   sbs,monitoring-interval-ms:
>     description:
>       Polling interval in milliseconds for battery status monitoring.
>       Intended for hardware designs where the battery's interrupt signal
>       is not connected, necessitating periodic status checks to detect
>       changes.


Nothing changed. It's exactly the same.

Explain me how "polling interval" by Linux driver is a hardware value?
What was not clear in my feedback?

Best regards,
Krzysztof