Re: [PATCH 0/2] qcom_battmgr: Add batteryless DC-adapter MAINS support

[Rakesh Kota]

On Tue, Jun 30, 2026 at 04:16:13PM +0200, Konrad Dybcio wrote:
> On 5/22/26 12:56 AM, Bjorn Andersson wrote:
> > On Tue, May 19, 2026 at 12:29:38PM +0530, Rakesh Kota wrote:
> >> On Mon, May 18, 2026 at 04:36:32PM +0200, Konrad Dybcio wrote:
> >>> On 5/18/26 3:49 PM, Rakesh Kota wrote:
> >>>> On batteryless boards powered by 12V DC adapters, registering the
> >>>> power supply as BATTERY causes userspace to incorrectly trigger
> >>>> battery power-saving sequences.
> >>>
> >>> Does battman really offer no way of differentiating whether a battery
> >>> is *actually* present in such cases?
> >>>
> >>> What boards are affected?
> >>>
> >> Currently, batteryless support is only implemented for the
> >> qcs6490-rb3gen2(Kodiak) board.
> >>
> > 
> > What do you mean?
> > 
> > Are you saying that the pmic_glink firmware in Kodiak has a one-off hack
> > that no other implementation of this firmware has?
> > 
> > My Lenovo IdeaCentre (hamoa) doesn't have battery, what should I do now?
> 
> I was going through my inbox.
> This remains unanswered, and I don't see the discussion progressing
> without resolving this.
>
To clarify — there is no platform-side hack involved. The Kodiak board
has a batteryless variant, but the pmic_glink firmware provides no way
to distinguish whether a battery is physically present or not. Since
this can't be determined from firmware, we introduced a DT-based
property to describe the hardware configuration explicitly.

This is not Kodiak-specific — any batteryless board, including hamoa,
can use the same DT property to avoid incorrect BATTERY registration

regards
Rakesh Kota