linux-kernel - Re: [PATCH v3 09/11] arm64: dts: qcom: sdm845-lg-common: Add camera flash

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Message-ID: <gk4dxz4wavdc66xr76bwiwu6o4f2d3iyxxwnyr3onmkwhlgk4k@tlvnmzbfbzbl>
Date: Mon, 6 Oct 2025 01:23:21 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Chris Brown <crispybrown@...il.com>
Cc: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Paul Sajna <sajattack@...tmarketos.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, David Heidelberg <david@...t.cz>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, phone-devel@...r.kernel.org,
        Amir Dahan <system64fumo@...tonmail.com>
Subject: Re: [PATCH v3 09/11] arm64: dts: qcom: sdm845-lg-common: Add camera
 flash

On Sun, Oct 05, 2025 at 03:35:56PM -0400, Chris Brown wrote:
> 850mA looks correct for the flash, whereas the flashlight/torch should
> be 100mA based on
> https://github.com/EmanuelCN/android_kernel_lge_sdm845/blob/U/arch/arm64/boot/dts/lge/sdm845-judy/sdm845-camera/sdm845-judy-camera.dtsi
> i.e. led-max-microamp = <100000>;

Please post your answers before the question rather than at the top of
the email.

> On Wed, 1 Oct 2025 at 05:04, Konrad Dybcio
> <konrad.dybcio@....qualcomm.com> wrote:
> >
> > On 9/29/25 7:05 AM, Paul Sajna wrote:
> > > So it can be used as a flashlight
> > >
> > > +             led-max-microamp = <850000>;
> > > +             flash-max-microamp = <850000>;
> >
> > Allowing the same current for flash (brief on/off for night photos)
> > and LED (flashlight which you normally toggle through quick settings)
> > sounds no less than suspicious
> >
> > > +             flash-max-timeout-us = <500000>;

-- 
With best wishes
Dmitry