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Date: Mon, 1 Jan 2024 21:13:36 +0530
From: Manivannan Sadhasivam <mani@kernel.org>
To: Luca Weiss <luca@z3ntu.xyz>
Cc: Bjorn Andersson <andersson@kernel.org>,
	Konrad Dybcio <konrad.dybcio@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Conor Dooley <conor+dt@kernel.org>,
	David Heidelberg <david@ixit.cz>,
	Caleb Connolly <caleb.connolly@linaro.org>,
	linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Manivannan Sadhasivam <mani@kernel.org>
Subject: Re: [PATCH] arm64: dts: qcom: sdm845: add power domain to UFS phy
 interface
Message-ID: <20240101154336.GA3280@thinkpad>
References: <20231229202959.266502-1-david@ixit.cz>
 <2710291.mvXUDI8C0e@z3ntu.xyz>
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In-Reply-To: <2710291.mvXUDI8C0e@z3ntu.xyz>

On Fri, Dec 29, 2023 at 10:37:56PM +0100, Luca Weiss wrote:
> On Freitag, 29. Dezember 2023 21:29:54 CET David Heidelberg wrote:
> > Reported by: `make CHECK_DTBS=1 qcom/sdm845-oneplus-enchilada.dtb`
> > 
> > Signed-off-by: David Heidelberg <david@ixit.cz>
> > ---
> >  arch/arm64/boot/dts/qcom/sdm845.dtsi | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > b/arch/arm64/boot/dts/qcom/sdm845.dtsi index c2244824355a..ad8677b62bfb
> > 100644
> > --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > @@ -2644,6 +2644,8 @@ ufs_mem_phy: phy@1d87000 {
> >  			clocks = <&gcc GCC_UFS_MEM_CLKREF_CLK>,
> >  				 <&gcc GCC_UFS_PHY_PHY_AUX_CLK>;
> > 
> > +			power-domains = <&gcc UFS_PHY_GDSC>;
> > +
> >  			resets = <&ufs_mem_hc 0>;
> >  			reset-names = "ufsphy";
> 
> This is potentially the wrong power domain, see the conversation here:
> https://lore.kernel.org/linux-arm-msm/20231204172829.GA69580@thinkpad/
> 

Yes, GDSCs are the power domain of the controllers, not PHYs. This applies to
other peripherals such as USB, PCIe etc...

- Mani

> Hopefully Mani can give some input here :)
> 
> Regards
> Luca
> 
> 

-- 
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