linux-kernel - Re: [PATCH v5 1/4] dt-bindings: mmc: Add dll-presets values for HS400 and HS200 modes

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Message-ID: <20251020-talented-inquisitive-bulldog-64aba0@kuoka>
Date: Mon, 20 Oct 2025 12:09:45 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Ram Prakash Gupta <quic_rampraka@...cinc.com>, 
	Ulf Hansson <ulf.hansson@...aro.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Adrian Hunter <adrian.hunter@...el.com>, Bjorn Andersson <andersson@...nel.org>, 
	Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-mmc@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, dmitry.baryshkov@....qualcomm.com, 
	quic_pragalla@...cinc.com, quic_sayalil@...cinc.com, quic_nitirawa@...cinc.com, 
	quic_bhaskarv@...cinc.com, kernel@....qualcomm.com, 
	Sachin Gupta <quic_sachgupt@...cinc.com>
Subject: Re: [PATCH v5 1/4] dt-bindings: mmc: Add dll-presets values for
 HS400 and HS200 modes

On Tue, Oct 14, 2025 at 02:06:46AM +0200, Krzysztof Kozlowski wrote:
> On 13/10/2025 16:53, Ram Prakash Gupta wrote:
> > From: Sachin Gupta <quic_sachgupt@...cinc.com>
> > 
> > Document the 'dll-presets' property for MMC device tree bindings.
> > The 'dll-presets' property defines the DLL configurations for HS400
> > and HS200 modes.
> > 
> > QC SoCs can have 0 to 4 SDHCI instances, and each one may need
> > different tuning.
> > 
> > Signed-off-by: Sachin Gupta <quic_sachgupt@...cinc.com>
> > Signed-off-by: Ram Prakash Gupta <quic_rampraka@...cinc.com>
> > ---
> >  Documentation/devicetree/bindings/mmc/sdhci-msm.yaml | 5 +++++
> >  1 file changed, 5 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.yaml b/Documentation/devicetree/bindings/mmc/sdhci-msm.yaml
> > index 594bd174ff21..f7b3b1ced3ce 100644
> > --- a/Documentation/devicetree/bindings/mmc/sdhci-msm.yaml
> > +++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.yaml
> > @@ -138,6 +138,11 @@ properties:
> >      $ref: /schemas/types.yaml#/definitions/uint32
> >      description: platform specific settings for DLL_CONFIG reg.
> >  
> > +  qcom,dll-presets:
> > +    maxItems: 10
> > +    $ref: /schemas/types.yaml#/definitions/uint32-array
> > +    description: platform specific settings for DLL registers.
> 
> One of my questions, never answered in original submission and in your
> versions, was to see the DTS user of it. I still do not see the DTS user.

There is no answer, so I mark the patch as changes requested.

Best regards,
Krzysztof