linux-kernel - Re: [PATCH v4 1/4] dt-bindings: mmc: Add dll-hsr-list for HS400 and HS200 modes

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Message-ID: <20251006214830.GB625548-robh@kernel.org>
Date: Mon, 6 Oct 2025 16:48:30 -0500
From: Rob Herring <robh@...nel.org>
To: Ram Prakash Gupta <quic_rampraka@...cinc.com>
Cc: Ulf Hansson <ulf.hansson@...aro.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>, 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 v4 1/4] dt-bindings: mmc: Add dll-hsr-list for HS400 and
 HS200 modes

On Mon, Sep 29, 2025 at 05:05:12PM +0530, Ram Prakash Gupta wrote:
> From: Sachin Gupta <quic_sachgupt@...cinc.com>
> 
> Document the 'dll-hsr-list' property for MMC device tree bindings.
> The 'dll-hsr-list' 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 22d1f50c3fd1..a60222473990 100644
> --- a/Documentation/devicetree/bindings/mmc/sdhci-msm.yaml
> +++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.yaml
> @@ -137,6 +137,11 @@ properties:
>      $ref: /schemas/types.yaml#/definitions/uint32
>      description: platform specific settings for DLL_CONFIG reg.
>  
> +  qcom,dll-hsr-list:

'-list' doesn't add anything.

What is 'hsr'?

> +    maxItems: 10
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    description: platform specific settings for DLL registers.
> +
>    iommus:
>      minItems: 1
>      maxItems: 8
> -- 
> 2.34.1
>