linux-kernel - [PATCH 0/8] Support Multi-frequency scale for UFS

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Message-Id: <20250116091150.1167739-1-quic_ziqichen@quicinc.com>
Date: Thu, 16 Jan 2025 17:11:41 +0800
From: Ziqi Chen <quic_ziqichen@...cinc.com>
To: quic_cang@...cinc.com, bvanassche@....org, mani@...nel.org,
        beanhuo@...ron.com, avri.altman@....com, junwoo80.lee@...sung.com,
        martin.petersen@...cle.com, quic_ziqichen@...cinc.com,
        quic_nguyenb@...cinc.com, quic_nitirawa@...cinc.com,
        quic_rampraka@...cinc.com
Cc: linux-scsi@...r.kernel.org, Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
        linux-kernel@...r.kernel.org (open list:ARM/Mediatek SoC support:Keyword:mediatek),
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM/Mediatek SoC support:Keyword:mediatek),
        linux-mediatek@...ts.infradead.org (moderated list:ARM/Mediatek SoC support:Keyword:mediatek)
Subject: [PATCH 0/8] Support Multi-frequency scale for UFS

With OPP V2 enabled, devfreq can scale clocks amongst multiple frequency
plans. However, the gear speed is only toggled between min and max during
clock scaling. Enable multi-level gear scaling by mapping clock frequencies
to gear speeds, so that when devfreq scales clock frequencies we can put
the UFS link at the appropraite gear speeds accordingly.

This series has been tested on below platforms -
SM8650 + UFS3.1
SM8750 + UFS4.0


Can Guo (6):
  scsi: ufs: core: Pass target_freq to clk_scale_notify() vops
  scsi: ufs: qcom: Pass target_freq to clk scale pre and post change
  scsi: ufs: core: Add a vops to map clock frequency to gear speed
  scsi: ufs: qcom: Implement the freq_to_gear_speed() vops
  scsi: ufs: core: Enable multi-level gear scaling
  scsi: ufs: core: Toggle Write Booster during clock scaling base on
    gear speed

Ziqi Chen (2):
  scsi: ufs: core: Check if scaling up is required when disable clkscale
  ARM: dts: msm: Use Operation Points V2 for UFS on SM8650

 arch/arm64/boot/dts/qcom/sm8650.dtsi | 51 ++++++++++++++++----
 drivers/ufs/core/ufshcd-priv.h       | 17 +++++--
 drivers/ufs/core/ufshcd.c            | 71 +++++++++++++++++++++-------
 drivers/ufs/host/ufs-mediatek.c      |  1 +
 drivers/ufs/host/ufs-qcom.c          | 60 ++++++++++++++++++-----
 include/ufs/ufshcd.h                 |  8 +++-
 6 files changed, 166 insertions(+), 42 deletions(-)

-- 
2.34.1