linux-kernel - Re: [PATCH] dt-bindings: remoteproc: qcom,adsp: Re-add cx-supply

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Message-ID: <CABTCjFBQOq1pmdou_17ZOV3MgTxD_2byAY4RitqPVN5FYdRuJg@mail.gmail.com>
Date: Thu, 11 Dec 2025 17:41:26 +0300
From: Dzmitry Sankouski <dsankouski@...il.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: Luca Weiss <luca@...aweiss.eu>, Bjorn Andersson <andersson@...nel.org>, 
	Mathieu Poirier <mathieu.poirier@...aro.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Manivannan Sadhasivam <mani@...nel.org>, Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>, 
	~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org, 
	linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: remoteproc: qcom,adsp: Re-add cx-supply

пн, 8 дек. 2025 г. в 19:33, Konrad Dybcio <konrad.dybcio@....qualcomm.com>:
>
> On 12/7/25 11:35 AM, Luca Weiss wrote:
> > Some boards (e.g. sdm845-samsung-starqltechn) provide a cx-supply
> > reference for the SLPI PAS.
> >
> > The Linux driver unconditionally tries getting "cx" and "px" supplies,
> > so it actually is used.
> >
> > Fixes: 3d447dcdae53 ("dt-bindings: remoteproc: qcom,adsp: Make msm8974 use CX as power domain")
> > Signed-off-by: Luca Weiss <luca@...aweiss.eu>
> > ---
> > There's literally one board using this upstream, judging from that I'm
> > not sure this is a misuse of cx-supply or what exactly. An alternative
> > to this patch is of course removing the usage in
> > sdm845-samsung-starqltechn, but as it stands right now the patch under
> > "Fixes" introduces a dtbs_check warning.
>
> FWIW that's likely a hack (because IIUC it needs to power up some
> regulator for the sensor devices to work) but that's "fine"
>

I confirm this probably powers up devices, because firmware boots fine
without cx-supply.

-- 

Best regards,
Dzmitry