linux-hardening - Re: [PATCH v2 2/7] firmware: samsung: acpm: Add TMU protocol support

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Message-ID: <4f7571ee-53a6-4144-817e-831bbb9d55cf@kernel.org>
Date: Fri, 13 Feb 2026 11:07:15 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Tudor Ambarus <tudor.ambarus@...aro.org>,
 "Rafael J. Wysocki" <rafael@...nel.org>,
 Daniel Lezcano <daniel.lezcano@...aro.org>, Zhang Rui <rui.zhang@...el.com>,
 Lukasz Luba <lukasz.luba@....com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>,
 Bartlomiej Zolnierkiewicz <bzolnier@...il.com>, Kees Cook <kees@...nel.org>,
 "Gustavo A. R. Silva" <gustavoars@...nel.org>,
 Peter Griffin <peter.griffin@...aro.org>,
 André Draszik <andre.draszik@...aro.org>
Cc: willmcvicker@...gle.com, jyescas@...gle.com, shin.son@...sung.com,
 linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2 2/7] firmware: samsung: acpm: Add TMU protocol support

On 19/01/2026 13:08, Tudor Ambarus wrote:
> The Thermal Management Unit (TMU) on the Google GS101 SoC is managed
> through a hybrid model shared between the kernel and the Alive Clock
> and Power Manager (ACPM) firmware.
> 
> Add the protocol helpers required to communicate with the ACPM for
> thermal operations, including initialization, threshold configuration,
> temperature reading, and system suspend/resume handshakes.
> 
> Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
> ---
>  drivers/firmware/samsung/Makefile                  |   1 +
>  drivers/firmware/samsung/exynos-acpm-tmu.c         | 212 +++++++++++++++++++++
>  drivers/firmware/samsung/exynos-acpm-tmu.h         |  33 ++++
>  drivers/firmware/samsung/exynos-acpm.c             |  12 ++
>  .../linux/firmware/samsung/exynos-acpm-protocol.h  |  24 +++
>  5 files changed, 282 insertions(+)

I understood from the cover letter this should go via thermal tree, so:

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>

Best regards,
Krzysztof