Re: [PATCH 1/2] dt-bindings: soc: qcom: pmic-glink: Document batteryless property

[Konrad Dybcio]

On 5/21/26 11:58 AM, Krzysztof Kozlowski wrote:
> On 21/05/2026 10:46, Konrad Dybcio wrote:
>> On 5/21/26 9:20 AM, Krzysztof Kozlowski wrote:
>>>> Since firmware does not have a way to dynamically tell if it on a
>>>> debug-board powered device or a DCIN powered device, We are required to
>>>> add this new DT property.
>>>
>>> Neither debug-board powered device nor battery-less will have
>>> monitored-battery, thus again, why lack of that property cannot tell you
>>> what you need?
>>
>> A device with a battery will not have a monitored-battery either
> But why? If for such device property "no battery" is suitable, then for
> me "monitored-battery" is suitable as well. IOW, if you say that having
> a property describing batter is not a accurate hardware property here,
> then neither saying "no battery" is, because no batter is basically some
> sort of battery (just like empty set is still a set, empty array is
> still an array).

The battmgr service running on one of the remoteprocs already has all
the information about the battery and it also handles all the type-c,
PD and charger configuration, only letting the OS know about the
results.

Hence, unless there's some other hardware at play (e.g. for custom
200 W charging), which wasn't fully implemented in the QC firmware,
there is no reason to describe a battery separately, since the OS
can't do anything useful with that information

In some abstract way, perhaps monitored_battery = <&pmic_glink> could
be thought of as valid (since that's the data source the OS gets to
see)

Konrad