linux-kernel - Re: [PATCH 1/2] dt-bindings: battery: Add SiLION battery bindings technology

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Message-ID: <20251126130652.mnsy5s3a2ymh33nw@hu-kotarake-hyd.qualcomm.com>
Date: Wed, 26 Nov 2025 18:36:52 +0530
From: Rakesh Kota <rakesh.kota@....qualcomm.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        kamal.wadhwa@....qualcomm.com, fenglin.wu@....qualcomm.com
Subject: Re: [PATCH 1/2] dt-bindings: battery: Add SiLION battery bindings
 technology

On Wed, Nov 26, 2025 at 09:14:23AM +0100, Krzysztof Kozlowski wrote:
> On 25/11/2025 15:59, Rakesh Kota wrote:
> > On Mon, Nov 24, 2025 at 12:37:01PM +0100, Krzysztof Kozlowski wrote:
> >> On 24/11/2025 12:12, Rakesh Kota wrote:
> >>> Document a new battery chemistry for silicon-anode lithium-ion
> >>> cells.
> >>>
> >>> Signed-off-by: Rakesh Kota <rakesh.kota@....qualcomm.com>
> >>> ---
> >>>  Documentation/devicetree/bindings/power/supply/battery.yaml | 1 +
> >>>  1 file changed, 1 insertion(+)
> >>>
> >>> diff --git a/Documentation/devicetree/bindings/power/supply/battery.yaml b/Documentation/devicetree/bindings/power/supply/battery.yaml
> >>> index 491488e7b970397b409c248fb0c2a524301686a9..49cbd03956eeb9fc8be72540d8bf35840ccd7156 100644
> >>> --- a/Documentation/devicetree/bindings/power/supply/battery.yaml
> >>> +++ b/Documentation/devicetree/bindings/power/supply/battery.yaml
> >>> @@ -44,6 +44,7 @@ properties:
> >>>        - const: lithium-ion-polymer
> >>>        - const: lithium-ion-iron-phosphate
> >>>        - const: lithium-ion-manganese-oxide
> >>> +      - const: lithium-ion-silicon-anode
> >>
> >>
> >> Where is any DTS user of this? You have entire cover letter to explain
> >> the background WHY you are doing this.
> > This new lithium-ion-silicon-anode chemistry is intended for the
> > Kaanapali platform, where we validate the silicon-anode Li-ion cells.
> > The bindings and driver changes were tested with the Kaanapali device.
> Again: DTS. Please answer that part.
>
Actually, the device-chemistry property (lithium-ion-silicon-anode) is
not added in Kaanapali DT because this battery chemistry and other
information is obtained from the charger firmware, which runs on
the remote processor.

I added this change mainly for completeness. If you feel it isn’t
necessary, I’m fine with dropping it and proceeding without this change.

Best regards,
Rakesh

> Best regards,
> Krzysztof