linux-kernel - Re: [PATCH V5 4/4] arm64: dts: qcom: sm8550: Add max-sd-hs-hz property

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Message-ID: <6deac56f-e21a-4447-bfa7-a414084676b8@kernel.org>
Date: Wed, 3 Sep 2025 10:21:32 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Sarthak Garg <quic_sartgarg@...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>, Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>,
 Adrian Hunter <adrian.hunter@...el.com>
Cc: linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 quic_nguyenb@...cinc.com, quic_rampraka@...cinc.com,
 quic_pragalla@...cinc.com, quic_sayalil@...cinc.com,
 quic_nitirawa@...cinc.com, quic_bhaskarv@...cinc.com, kernel@....qualcomm.com
Subject: Re: [PATCH V5 4/4] arm64: dts: qcom: sm8550: Add max-sd-hs-hz
 property

On 03/09/2025 10:04, Sarthak Garg wrote:
> Due to board-specific hardware constraints particularly related
> to level shifter in this case the maximum frequency for SD High-Speed
> (HS) mode must be limited to 37.5 MHz to ensure reliable operation of SD
> card in HS mode.
> 
> This is achieved by introducing the `max-sd-hs-hz` property in the
> device tree, allowing the controller to operate within safe frequency
> limits for HS mode.
> 

Probably we will now replicate the same discussion... And it will be
happening every time you send the same and not reflect it in commit msg.

Bindings say board setup, this commit msg says board config, but the
patch says SoC. This is not correct.

Best regards,
Krzysztof