linux-kernel - [PATCH v2 0/2] Enable 1GHz OPP am335x-bonegreen-eco

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: <20251106-fix_tps65219-v2-0-a7d608c4272f@bootlin.com>
Date: Thu, 06 Nov 2025 11:49:01 +0100
From: "Kory Maincent (TI.com)" <kory.maincent@...tlin.com>
To: Aaro Koskinen <aaro.koskinen@....fi>, 
 Andreas Kemnade <andreas@...nade.info>, Kevin Hilman <khilman@...libre.com>, 
 Roger Quadros <rogerq@...nel.org>, Tony Lindgren <tony@...mide.com>, 
 Lee Jones <lee@...nel.org>, Shree Ramamoorthy <s-ramamoorthy@...com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Andrew Davis <afd@...com>, Bajjuri Praneeth <praneeth@...com>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, linux-omap@...r.kernel.org, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 "Kory Maincent (TI.com)" <kory.maincent@...tlin.com>, 
 stable@...r.kernel.org
Subject: [PATCH v2 0/2] Enable 1GHz OPP am335x-bonegreen-eco

The vdd_mpu regulator maximum voltage was previously limited to 1.2985V,
which prevented the CPU from reaching the 1GHz operating point. This
limitation was put in place because voltage changes were not working
correctly, causing the board to stall when attempting higher frequencies.
Increase the maximum voltage to 1.3515V to allow the full 1GHz OPP to be
used.

Add a TPS65219 PMIC driver fixes that properly implement the LOCK register
handling, to make voltage transitions work reliably.

Changes in v2:
- Setup a custom regmap_bus only for the TPS65214 instead of checking
  the chip_id every time reg_write is called.
- Add the am335x-bonegreen-eco devicetree change in the same patch
  series.

Signed-off-by: Kory Maincent (TI.com) <kory.maincent@...tlin.com>
---
Kory Maincent (TI.com) (2):
      mfd: tps65219: Implement LOCK register handling for TPS65214
      ARM: dts: am335x-bonegreen-eco: Enable 1GHz OPP by increasing vdd_mpu voltage

 arch/arm/boot/dts/ti/omap/am335x-bonegreen-eco.dts |  2 +-
 drivers/mfd/tps65219.c                             | 51 +++++++++++++++++++++-
 include/linux/mfd/tps65219.h                       |  2 +
 3 files changed, 53 insertions(+), 2 deletions(-)
---
base-commit: 1c353dc8d962de652bc7ad2ba2e63f553331391c
change-id: 20251106-fix_tps65219-dd62141d22cf

Best regards,
-- 
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com