linux-kernel - RE: [PATCH v7 RESEND 2/3] thermal: exynos_tmu: Support new hardware and update TMU interface

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Message-ID: <000c01dc5d37$7b1b8da0$7152a8e0$@samsung.com>
Date: Mon, 24 Nov 2025 20:42:56 +0900
From: 손신 <shin.son@...sung.com>
To: "'Daniel Lezcano'" <daniel.lezcano@...aro.org>, "'Bartlomiej
 Zolnierkiewicz'" <bzolnier@...il.com>, "'Krzysztof Kozlowski'"
	<krzk@...nel.org>, "'Rafael J . Wysocki'" <rafael@...nel.org>, "'Zhang Rui'"
	<rui.zhang@...el.com>, "'Lukasz	Luba'" <lukasz.luba@....com>, "'Rob
	Herring'" <robh@...nel.org>, "'Conor Dooley'" <conor+dt@...nel.org>, "'Alim
	Akhtar'" <alim.akhtar@...sung.com>
Cc: "'Henrik Grimler'" <henrik@...mler.se>, <linux-pm@...r.kernel.org>,
	<linux-samsung-soc@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<shin.son@...sung.com>
Subject: RE: [PATCH v7 RESEND 2/3] thermal: exynos_tmu: Support new hardware
 and update TMU interface

Hello, Daniel Lezcano.

> -----Original Message-----
> From: Daniel Lezcano [mailto:daniel.lezcano@...aro.org]
> Sent: Monday, November 24, 2025 8:09 PM
> To: 손신 <shin.son@...sung.com>; 'Bartlomiej Zolnierkiewicz'
> <bzolnier@...il.com>; 'Krzysztof Kozlowski' <krzk@...nel.org>; 'Rafael J .
> Wysocki' <rafael@...nel.org>; 'Zhang Rui' <rui.zhang@...el.com>; 'Lukasz
> Luba' <lukasz.luba@....com>; 'Rob Herring' <robh@...nel.org>; 'Conor
> Dooley' <conor+dt@...nel.org>; 'Alim Akhtar' <alim.akhtar@...sung.com>
> Cc: 'Henrik Grimler' <henrik@...mler.se>; linux-pm@...r.kernel.org; linux-
> samsung-soc@...r.kernel.org; devicetree@...r.kernel.org; linux-arm-
> kernel@...ts.infradead.org; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH v7 RESEND 2/3] thermal: exynos_tmu: Support new
> hardware and update TMU interface
> 
> On 11/24/25 12:04, 손신 wrote:
> > Hello, Daniel Lezcano.
> >
> >> On 11/24/25 11:06, 손신 wrote:
> >> [ ... ]
> >>
> >>> However, since ExynosAutov920 diverges significantly from the
> >>> existing driver, Would introducing a separate driver instead of
> >>> unifying
> >> everything be acceptable?
> >>
> >> So this driver is one controller for multiple sensors while the
> >> others drivers are one controller for one sensor, right ?
> >>
> >
> > Yes. As far as I understand, the previous Exynos variants used one TMU
> > controller per sensor, while on ExynosAutoV920 the hardware has multiple
> TMU instances and each instance contains multiple sensors.
> > Therefore, this new automotive SoC requires supporting multiple sensors
> behind a single TMU controller.
> 
> Ok thanks. It makes sense to create a separate driver.

Then, I'll prepare a new patch series. Thank you for your feedback

Best regards,
Shin