linux-hardening - Re: [PATCH 3/8] dt-bindings: mfd: Add Google GS101 TMU Syscon

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Message-ID: <0176a63a-6b04-4e30-b718-847133882050@kernel.org>
Date: Fri, 16 Jan 2026 10:14:28 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Tudor Ambarus <tudor.ambarus@...aro.org>
Cc: "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>, Lee Jones <lee@...nel.org>,
 Alim Akhtar <alim.akhtar@...sung.com>,
 Peter Griffin <peter.griffin@...aro.org>,
 André Draszik <andre.draszik@...aro.org>,
 Bartlomiej Zolnierkiewicz <bzolnier@...il.com>, Kees Cook <kees@...nel.org>,
 "Gustavo A. R. Silva" <gustavoars@...nel.org>, willmcvicker@...gle.com,
 jyescas@...gle.com, shin.son@...sung.com, linux-pm@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org,
 linux-hardening@...r.kernel.org
Subject: Re: [PATCH 3/8] dt-bindings: mfd: Add Google GS101 TMU Syscon

On 16/01/2026 09:50, Tudor Ambarus wrote:
> 
> Because of the hybrid approach I'm arguing the ACPM child node does not
> fully describe the hardware, and it's just a firmware abstraction.
> So option 2/ would be to have just the TMU IP block described with a
> phandle to the ACPM IPC:
> 
> soc: soc@0 {
>     tmu@...a0000 {
>         compatible = "google,gs101-tmu-top";
>         reg = <0x100a0000 0x800>;
>         clocks = <&cmu_misc CLK_GOUT_MISC_TMU_TOP_PCLK>;
>         interrupts = <GIC_SPI 769 IRQ_TYPE_LEVEL_HIGH 0>;
>         
>         /* The "Firmware Phandle" approach */
>         samsung,acpm-ipc = <&acpm_ipc>;
>         
>         #thermal-sensor-cells = <1>;

Yes, this one, I think it's the best representation.

Best regards,
Krzysztof