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Message-ID: <3453985c13aa51d068c0174e51e378fb@manjaro.org>
Date: Wed, 03 Sep 2025 10:24:55 +0200
From: Dragan Simic <dsimic@...jaro.org>
To: Sarthak Garg <quic_sartgarg@...cinc.com>
Cc: 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>,
 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 0/4] Add level shifter support for qualcomm SOC's

Hello Sarthak and Krzysztof,

On 2025-09-03 10:04, Sarthak Garg wrote:
> Add level shifter support for qualcomm SOC's.
> 
> - Changed from v4
>     - As suggested by Krzysztof Kozlowski Renamed the property from
>     `max-sd-hs-frequency` to `max-sd-hs-hz` for clarity.

I just spotted this series, so I'm sorry for jumping in late.  To me,
"max-sd-hs-frequency" was actually a better choice, because it goes
together with the already existing "max-frequency" property.

Yes, "max-sd-hs-hz" is obviously more clear, but to me, consistency
is more important.  Just my $.02.

>     - As suggested by Krzysztof Kozlowski remove min/max constraints
>     and add default: 50000000 in dt-bindings.
>     - As suggested by Konrad Dybcio moved max-sd-hs-hz property in the
>     SoC dtsi.
>     - Retained sdhci-caps-mask in sm8550.dtsi for now and will revisit
>     its removal for future targets after thorough validation and 
> testing
>     from the beginning.
> 
> - Changed from v3
>     - As suggested by Krzysztof Kozlowski moved the property from the
>     SoC-level DTS to the board-level DTS.
>     - Revised the commit messages to clearly explain its 
> board-specific.
> 
> - Changed from v2
>     - As suggested by Konrad Dybcio and Ulf Hansson redesigned logic
>       to introduce a new DT property max-sd-hs-frequency and override
>       the hs_max_dtr accordingly in sd.c file.
> 
> - Changed from v1
>     - As suggested by Krzysztof Kozlowski redesigned logic to use
>     compatible property for adding this level shifter support.
>     - Addressed Adrian Hunter comments on V1 with resepect to
>       checkpatch.
>     - Cleared the bits first and then set bits in
>       sdhci_msm_execute_tuning as suggested by Adrian Hunter.
>     - Upated the if condition logic in msm_set_clock_rate_for_bus_mode
>       as suggested by Adrian Hunter.
> 
> Sarthak Garg (4):
>   mmc: sdhci-msm: Enable tuning for SDR50 mode for SD card
>   dt-bindings: mmc: controller: Add max-sd-hs-frequency property
>   mmc: core: Introduce a new flag max-sd-hs-hz
>   arm64: dts: qcom: sm8550: Add max-sd-hs-hz property
> 
>  .../bindings/mmc/mmc-controller-common.yaml       |  8 ++++++++
>  arch/arm64/boot/dts/qcom/sm8550.dtsi              |  1 +
>  drivers/mmc/core/host.c                           |  2 ++
>  drivers/mmc/core/sd.c                             |  2 +-
>  drivers/mmc/host/sdhci-msm.c                      | 15 +++++++++++++++
>  include/linux/mmc/host.h                          |  1 +
>  6 files changed, 28 insertions(+), 1 deletion(-)

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