linux-kernel - Re: [PATCH 01/22] dt-bindings: thermal: samsung,exynos: specify cells

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Message-ID: <003b73f2-3b5d-40b7-a87c-2fc937e81bcd@kernel.org>
Date: Sat, 15 Jun 2024 11:39:12 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Alim Akhtar <alim.akhtar@...sung.com>,
 'Krzysztof Kozlowski' <krzysztof.kozlowski@...aro.org>,
 'Daniel Lezcano' <daniel.lezcano@...aro.org>,
 'Zhang Rui' <rui.zhang@...el.com>, 'Lukasz Luba' <lukasz.luba@....com>,
 'Rob Herring' <robh@...nel.org>, 'Conor Dooley' <conor+dt@...nel.org>,
 'Guillaume La Roque' <glaroque@...libre.com>,
 'Krzysztof Kozlowski' <krzk+dt@...nel.org>,
 'Vasily Khoruzhick' <anarsoul@...il.com>, 'Chen-Yu Tsai' <wens@...e.org>,
 'Jernej Skrabec' <jernej.skrabec@...il.com>,
 'Samuel Holland' <samuel@...lland.org>, 'Shawn Guo' <shawnguo@...nel.org>,
 'Sascha Hauer' <s.hauer@...gutronix.de>,
 'Pengutronix Kernel Team' <kernel@...gutronix.de>,
 'Fabio Estevam' <festevam@...il.com>, 'Anson Huang' <Anson.Huang@....com>,
 'Thierry Reding' <thierry.reding@...il.com>,
 'Jonathan Hunter' <jonathanh@...dia.com>,
 'Dmitry Baryshkov' <dmitry.baryshkov@...aro.org>,
 'Amit Kucheria' <amitk@...nel.org>,
 'Niklas Söderlund' <niklas.soderlund@...natech.se>,
 'Heiko Stuebner' <heiko@...ech.de>, 'Biju Das' <biju.das.jz@...renesas.com>,
 'Orson Zhai' <orsonzhai@...il.com>,
 'Baolin Wang' <baolin.wang@...ux.alibaba.com>,
 'Chunyan Zhang' <zhang.lyra@...il.com>,
 'Alexandre Torgue' <alexandre.torgue@...s.st.com>,
 'Pascal Paillet' <p.paillet@...s.st.com>, 'Keerthy' <j-keerthy@...com>,
 'Broadcom internal kernel review list'
 <bcm-kernel-feedback-list@...adcom.com>,
 'Florian Fainelli' <florian.fainelli@...adcom.com>,
 'Scott Branden' <sbranden@...adcom.com>,
 'zhanghongchen' <zhanghongchen@...ngson.cn>,
 'Matthias Brugger' <matthias.bgg@...il.com>,
 'AngeloGioacchino Del Regno' <angelogioacchino.delregno@...labora.com>,
 'Bjorn Andersson' <andersson@...nel.org>,
 'Geert Uytterhoeven' <geert+renesas@...der.be>
Cc: 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, linux-amlogic@...ts.infradead.org,
 linux-sunxi@...ts.linux.dev, imx@...ts.linux.dev,
 linux-tegra@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 linux-renesas-soc@...r.kernel.org, linux-rockchip@...ts.infradead.org,
 linux-stm32@...md-mailman.stormreply.com,
 'Florian Fainelli' <f.fainelli@...il.com>,
 linux-rpi-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
 cpgs@...sung.com
Subject: Re: [PATCH 01/22] dt-bindings: thermal: samsung,exynos: specify cells

On 14/06/2024 16:29, Alim Akhtar wrote:
> Hi Krzysztof,
> 
>> -----Original Message-----
>> From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>> Sent: Friday, June 14, 2024 3:16 PM
>> To: Daniel Lezcano <daniel.lezcano@...aro.org
> .stormreply.com;
>> Subject: [PATCH 01/22] dt-bindings: thermal: samsung,exynos: specify cells
>>
>> All Samsung Exynos SoCs Thermal Management Units have only one sensor, so
>> make '#thermal-sensor-cells' fixed at 0.
>>
> This is not entirely true, there are SoCs which have multiple temp sensors.
> It is true that currently only one sensor support is added though.

All supported by mainline. Others do not exist now :)

> 
> So we can leave this as is or you suggest to make it to support only one sensor
> (to match the current DT support), and later (in near future) change it again to
> match what HW actually support?

Yes, different devices can have different value (and bindings).
Best regards,
Krzysztof