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: <aaa3c616-a317-7a87-e6ef-82ebbb06d67d@quicinc.com>
Date: Wed, 22 Oct 2025 12:17:24 +0530
From: Ram Prakash Gupta <quic_rampraka@...cinc.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
        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 10/20/2025 3:39 PM, Krzysztof Kozlowski wrote:
> 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

ok, I will provide this in next patchset.

Thanks,
Ram

>