linux-kernel - [PATCH V3 0/2] Add regulator load support for QMP UFS PHY

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250819222832.8471-1-quic_nitirawa@quicinc.com>
Date: Wed, 20 Aug 2025 03:58:24 +0530
From: Nitin Rawat <quic_nitirawa@...cinc.com>
To: vkoul@...nel.org, kishon@...nel.org, mani@...nel.org,
        dmitry.baryshkov@....qualcomm.com, andersson@...nel.org,
        konradybcio@...nel.org
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Nitin Rawat <quic_nitirawa@...cinc.com>
Subject: [PATCH V3 0/2] Add regulator load support for QMP UFS PHY

The series improves regulator handling in the QMP UFS PHY driver and
adds load configuration support for SM8650 and SM8750 platforms.

On some SoCs, regulators are shared between the UFS PHY and other IP
blocks. To maintain stability and power efficiency, the regulator
framework needs to know the UFS PHY's peak load, as it determines the
regulator's operating mode.

The first update replaces devm_regulator_bulk_get() with
devm_regulator_bulk_get_const(), converts the regulator name array to
a bulk data structure, and uses the init_load_uA field to automatically
apply regulator_set_load() before the first enable.

The second update adds platform-specific load settings for SM8650 and
SM8750 to ensure proper power management where regulators are shared.

Changes from v2:
1. Addressed Dmitry's comment to replace devm_regulator_bulk_get() with
   devm_regulator_bulk_get_const.
2. inline the qmp_ufs_vreg_init() function

Changes from v1:
1. Addressed comments to move load configuration from device tree to
   hardcoded, per-compatible data within the driver.
2. Accordingly updated commit text to reflect the same.
3. Addressed Manivannan's comment to avoid initialization of load.

Nitin Rawat (2):
  phy: qcom-qmp-ufs: Add regulator load voting for UFS QMP PHY
  phy: qcom-qmp-ufs: Add regulator loads for SM8650 and SM8750

 drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 48 ++++++++++++-------------
 1 file changed, 23 insertions(+), 25 deletions(-)

--
2.48.1